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New Focus Swept-Wavelength Tunable Laser Source TLB 6500 Series, User Manual

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New Focus Swept-Wavelength Tunable Laser Source TLB 6500 Series User Manual Download Page 82

Swept-Wavelength Tunable Laser Source

™

Principles of Operation • 83

Principles of Operation

Overview

Traditional diode-laser technology provides high reliability, high 
electrical efficiency, and a wide range of available wavelengths in a 
compact package. By using an external cavity built around a diode 
laser, the Swept-Wavelength Tunable Laser Source provides enhanced 
performance compared to an off-the-shelf diode laser, guaranteeing 
single-mode operation with narrow linewidth and precise wavelength 
tuning. 

General Theory

The Swept-Wavelength 
Tunable Laser Source is 
based on the Littman-
Metcalf design (see 
“References” on page 85), 
which uses a diffraction 
grating at grazing 
incidence to provide 
wavelength selectivity. 
Essential to the 
performance of tunable external-cavity diode lasers (ECDLs) is a high-
quality anti-reflection (AR) coating on the front facet of the diode. The 
AR coating turns the diode into purely a gain element. A collimating 
lens directs the output of the diode across a diffraction grating at 
grazing incidence. The retroreflector in the laser cavity reflects the first-
order diffraction off the grating to provide feedback. Dispersion 

Pivot
Point

Laser Diode

Chip

HR

Coating

AR 

Coating

Collimating Lens

Retroreflector

Diffraction

Grating

Laser

Output

Wavelength

Tuning

Littman-Metcalf Laser Cavity

US Patent #5,319,668

Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com

Summary of Contents for Swept-Wavelength Tunable Laser Source TLB 6500 Series

Page 1: ...underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos In stock Ready to ship TAR certified secure asset solutions Expert team I Trust guarantee I 100 satisfaction All trademarks brand names and brands appearing herein are the property of their respective o...

Page 2: ...nts Pending Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure 2584 Junction Ave San Jose CA 95134 1902 USA phone 408 919 1500 e mail contact newfocus com www newfocus com Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 3: ...cribed in this document are covered by U S Patent 5 319 668 and patents pending Information in this document is subject to change without notice Copyright 2003 2002 1998 New Focus Inc All rights reserved The and logos the symbol and NEW FOCUS Inc are registered trademarks and Swept Wavelength Tunable Laser Source is a trademark of New Focus Inc Document Number 650152 Rev E Artisan Technology Group...

Page 4: ...wer 15 Turning Off the Power 15 General Operation 17 Overview 17 What s Inside 17 Understanding the Laser s Operating Modes 18 Performing a Wavelength Sweep Sweep Mode 22 Performing a Step Scan 26 Scanning Wavelengths in Track Mode 29 Scanning Wavelengths in Program Mode 32 Configuring the System 35 Monitoring Swept Scans 38 Modulating the Laser Output 39 Reading an Input Signal 40 Artisan Technol...

Page 5: ... Won t Work 85 Can t Access Some Commands or Screen Controls 85 Computer Control Doesn t Work 85 Wavelength Not Set to the Start Wavelength 86 Scans Won t Start 86 Power Display Flashes 86 Temperature Display Flashes 87 Triggers are Inconsistent 87 Error Codes 87 Calibrating the Laser 88 Customer Service 89 Service and Maintenance 89 Technical Support 89 Appendices 91 Appendix A Physical Specifica...

Page 6: ...Swept Wavelength Tunable Laser Source 7 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 7: ...8 NEW FOCUS Inc Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 8: ...rotective goggles or eyeglasses appropriate for working with laser light Avoid looking at the beam directly Be aware of the warning and safety labels examples are shown on page 10 To completely shut off electrical power to the unit disconnect the power cord from the product Do not open the laser system There are no user serviceable parts inside the unit Viewing the laser output with certain optica...

Page 9: ...se be aware of them and use caution when working with the laser Model Wavelength Range Max Power TLB 6500 L CL 1450 1650 nm 55 mW TLB 6500 H CL 1450 1650 nm 55 mW TLB 6500 L ES 1400 1540 nm 55 mW TLB 6500 H ES 1400 1540 nm 55 mW TLB 6500 L O 1150 1350 nm 55 mW TLB 6500 H O 1150 1350 nm 55 mW TLB 6500 H 09 940 1050 nm 55 mW Unauthorized opening of the laser will void the warranty and may result in ...

Page 10: ...and Patents Pending Model Number Serial Number Manufactured Complies with 21 CFR 1040 10 and 1040 11 except for deviations pursuant to Laser Notice 50 dated 7 26 2001 CAUTION Risk of electric shock do not remove cover Refer servicing to qualified service personnel 100 240 VAC 4 3 1 7A 48 66 Hz Input VAC Fuse 100 120 5 0 A T 220 240 2 5 A T WARNING For continued protection against fire hazard repla...

Page 11: ...lock terminals Do not remove this jumper unless you are using the safety interlock feature the laser will not emit light unless the interlock circuit is closed The circuit carries 15 V DC For the exact location of the safety interlock connector see Controller Back Panel and Tunable Laser Cavity Connections on page 15 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www art...

Page 12: ... damage such as dented or scratched covers or broken knobs please contact New Focus immediately Save the shipping container and packing material for future shipping needs Familiarizing Yourself with the System Controller Front Panel The Swept Wavelength Tunable Laser Source has two control options local and remote In local mode the detatchable front screen located in the front panel of the laser p...

Page 13: ...diode until the Laser Power but ton is activated 2 Front Screen Use this removable screen to control the laser using an icon based interface 3 Selection Knob Use this knob on the front screen to navigate through numeric inputs on the screen 4 Laser Output Connector for FC APC connectorized fiber The polarization is aligned parallel to the key on the FC connector Note Note Make sure the laser outpu...

Page 14: ... external keyboard to the laser for data entry 7 Printer port Port used to connect an external printer to the laser 8 Detector Input BNC connector for monitoring an external instrument through the laser controller s computer interface 9 Monitor port Use this port to connect an external monitor to the laser 10 Current Modulation Input BNC connector for modulating the laser current amplitude 1 3 12 ...

Page 15: ...the laser system at least 4 hours to equalize The laser is shipped with brackets for mounting the system in a rack and with rubber feet for using the system on a table top Use a 1 8 Allen wrench to add or remove the feet or the brackets Connecting Fiber to the Laser Use only FC APC connectorized fiber with the Swept Wavelength Tunable Laser Source This laser operates with polarization maintaining ...

Page 16: ...ning on the Front Panel button to initialize system to allow the system to warm up Once you turn on the power and the system initializes about 30 seconds you can operate the system remotely through the IEEE 488 GPIB RS 232 or Ethernet ports Refer to the Computer Control chapter beginning on page 43 for details The system will take another 2 minutes to start the Welcome screen Turning Off the Power...

Page 17: ...18 Getting Started NEW FOCUS Inc Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 18: ...rol on page 43 What s Inside The Swept Wavelength Tunable Laser Source is an external cavity diode laser ECDL based on the Littman Metcalf design see Principles of Operation on page 83 The laser is designed to provide very accurate and linear wavelength scans Smooth and fast tuning is achieved with a brushless DC motor An optional wavelength ramp ensures linearity by adding 2 nm before and after t...

Page 19: ...across a wavelength range you specify stopping at set intervals and dwelling at each wavelength for the time you specify Track Mode Use Track Mode to tune to a specific wavelength Program Mode Use Program Mode to perform a sweep across a list of wavelengths you specify System Configuration Use this mode to access the following system settings Display Laser Information Wavelength Offset and Trim ca...

Page 20: ...s If this is the first time you have powered up the system enter the default password 1234 Figure 6 The Password screen Enabling Local Control The Swept Wavelength Tunable Laser Source comes with a detachable touch screen icon based interface Commands sent over the IEEE GPIB RS 232 or Ethernet interface will switch the laser into remote mode and disable most of the front screen controls This remot...

Page 21: ...on the Swept Wavelength Tunable Laser Source require numeric inputs When you select an icon on the front screen representing a function that requires numeric inputs a keypad appears Enter values by touching the number pads on the screen Use the CE pad to clear the value use the C pad to exit from the keypad without changing or entering a new value use the forward and backward pads to move forward ...

Page 22: ...board to Enter Data You can enter or edit numeric data using a standard keyboard attached to the laser through the back keyboard port See Controller Back Panel and Tunable Laser Cavity Connections on page 15 for the location of the keyboard port You can use the keyboard instead of the graphical keypad or front knob to enter numeric data However even with a keyboard attached the graphical keypad an...

Page 23: ...eep Mode select the Sweep Mode icon The Sweep Mode screen appears From this screen you can set the parameters for your wavelength sweep Figure 8 The Sweep Mode screen Setting the Start Wavelength To set the wavelength at which the sweep will begin 1 Select the Start Wavelength icon The keypad appears 2 Enter the start wavelength value and choose Enter when you are finished Note Note You cannot cha...

Page 24: ... nm to THz 1 Select the Set Speed icon The keypad appears 2 Enter the scan speed value and choose Enter when you are finished Setting Output Triggers A and B As the laser sweeps it is capable of sending trigger pulses to external measurement instruments The signals are sent through two back panel outputs Output Trigger A and Output Trigger B The rising edge of the output pulse corresponds with the...

Page 25: ...oose Enter when you are finished Using the Wavelength Ramp In order to obtain extremely linear tuning the laser can add 2 nm ramps to the beginning and end of the scan range which allow the motor to get up to speed before the specified start wavelength and to Pulse Width 660 µs Note Note For the location of the Trigger A and Trigger B outputs on the back panel see Controller Back Panel and Tunable...

Page 26: ...ontinuous scan When you select the Single Scan icon the keypad appears 2 Enter the number of times you d like the laser to run the sweep 3 To set the laser to run continuously through a scan routine select the Continuous Scan icon The laser will run the sweep until you select the Reset icon See page 77 for information about setting the specific number of sweeps using computer control Setting the P...

Page 27: ... icon The laser will finish the current sweep and return to the Start wavelength 2 To abort a sweep select the Reset icon twice The laser will immediately stop the current sweep and return to the Start wavelength Performing a Step Scan Step scans allow you to dwell at evenly spaced wavelengths through the range you specify You control the start and stop wavelengths the step size and the dwell time...

Page 28: ... wavelength at which the step scan will end 1 Select the Stop Wavelength icon The keypad appears 2 Enter the stop wavelength value and choose Enter when you are finished Setting the Laser Power To set the constant power at which the laser will operate through the step scan 1 Select the Set Power Level icon The keypad appears Note Note You cannot change the start or stop wavelengths during a scan S...

Page 29: ...n the scan 3 To set the laser to run continuously through a scan routine select the Continuous Scan icon The laser will run the scan until you select the Reset icon See page 77 for information about setting the specific number of scans using computer control Setting the Pause Time When the laser is in Step Scan Mode the Pause Time icon is used to set the amount of time the laser should dwell at ea...

Page 30: ...eset icon The laser will fin ish the current sweep and return to the Start wavelength 2 To abort a sweep select the Reset icon twice The laser will immediately stop the current sweep and return to the Start wavelength Scanning Wavelengths in Track Mode The Swept Wavelength Tunable Laser Source can tune to a specific wavelength This is called Track Mode While in Track Mode you can actively control ...

Page 31: ...d choose Enter when you are finished 3 To scan a different wavelength select the Set Wavelength icon again The keypad appears 4 Enter the next wavelength value and choose Enter when you are finished 5 The system will store the wavelength values you enter in a list 6 To switch between wavelengths click the wavelength values in the list Artisan Technology Group Quality Instrumentation Guaranteed 888...

Page 32: ...nished Turning Laser Diode On or Off To turn on the current to the laser diode select the Laser Diode icon When the current is off this icon will display a grey star When the current is on this icon will display a green star The icon will flash during the five second safety delay before the current is activated The icon will remain green while current is flowing to the laser diode Artisan Technolo...

Page 33: ...rogram Mode icon The Program Mode screen appears From this screen you can enter the wavelengths you want to scan You can also set the laser power and dwell time at each wavelength Figure 11 The Program Mode screen Creating the Wavelength List To create a list of wavelengths to scan 1 Select the Set Wavelength icon The Wavelength List screen appears 2 On this screen you can Add Edit or Delete Wavel...

Page 34: ...lly in the list Editing Wavelength Values If you need to change a wavelength value you have entered select the wavelength value from the list and select the Edit a Wavelength icon The keypad appears displaying the wavelength value you selected Change the value and choose Enter when you are finished Deleting Wavelength Values To delete a wavelength value from the list select the wavelength value fr...

Page 35: ...oggles between single and continuous scan When you select the Single Scan icon the keypad appears 2 Enter the number of times you d like the laser to run the sweep 3 To set the laser to run continuously through a scan routine select the Continuous Scan icon The laser will run the sweep until you select the Reset icon See page 77 for information about setting the specific number of sweeps using com...

Page 36: ...weep select the Reset icon twice The laser will immediately stop the current sweep and return to the Start wavelength Configuring the System To configure your system select the System icon The System screen appears From this screen you can Display Information Set Offset and Trim used for laser calibration Set Preferences Set Language preference and select the Interface type for your ports Figure 1...

Page 37: ...is function is password protected Setting Preferences The Set Preferences icon displays the Preferences screen From this screen you can Choose to set laser in Constant Power Mode or Constant Current Mode Choose to see power values in dBm or mW Choose to see wavelength values in nm or frequency values in Thz Change passwords The laser can operate in either Constant Power Mode or Constant Current Mo...

Page 38: ...nished Select the green CheckMark icon to finish Setting the Language The Set Language icon displays the list of language choices for the Help file English is the default language Selecting the Communication Interface Select Port The Select Port icon displays the Select Port screen From this screen choose between communication interfaces GPIB RS 232 or Ethernet for peripheral devices This function...

Page 39: ...ring the wavelength ramps or as the laser resets from the stop wavelength back to the start wavelength Laser Sync Output Specifications Connector Type BNC Voltage Range 3 4 V Max Load Impedance 50 Ω Accuracy rising edge 2 5 ms Note Note You should not use the Laser Sync Output as a trigger since the error is usually greater than 1 ms Artisan Technology Group Quality Instrumentation Guaranteed 888 ...

Page 40: ... adding the current shown on the front panel display to the modulation input Current Modulation Input Guidelines DC coupled Connector Type BNC Max Voltage 10 V Input Frequency Range 10 kHz 1 MHz Impedance 1 kΩ Modulation 1 mA V The DC coupled Current Modulation Input is NOT current limited DO NOT modulate the current with input voltages above 10 V Note Note Since changes in the current affect the ...

Page 41: ... photodetector during a wavelength scan The signal from this input can only be read using computer control see page 57 it will not be displayed on the front screen Connect the line for the input signal to the BNC connector on the back of the laser controller Make sure the signal conforms to the following specifications Detector Input Guidelines Connector Type BNC Voltage Range 0 V to 10 V Input Fr...

Page 42: ...ace allows for communication over a network Upon receiving a command over the computer interface the front panel functions are locked out Use the Local button on the front panel to re enable the front panel All front panel operations are available through computer control In addition several functions are unique to computer control Before attempting to communicate with the instrument you must set ...

Page 43: ...gn a device address to the laser controller that is unique from all the other IEEE 488 components attached to your computer See Programming for this Laser on page 48 for more information on using the IEEE interface Setting the Device Address 1 On the main screen choose the System icon The System screen appears 2 On the System screen choose the Select Port icon The keypad appears 3 Enter your passw...

Page 44: ...g for this Laser on page 48 for more information on using the RS 232 interface Setting the Baud Rate for RS 232 The RS 232 interface works at baud rates of 300 1200 2400 4800 9600 19200 38400 or 57600 1 On the main screen choose the System icon The System screen appears 2 On the System screen choose the Select Port icon The keypad appears 3 Enter your password using the keypad The Select Port scre...

Page 45: ...he controller to use the Ethernet interface The Ethernet connector on the back of the laser controller allows for remote communication with the laser through a standard network cable The connector is 10 base T The port is 1034 on the TCP IP protocol See Programming for this Laser on page 48 for more information on using the Ethernet interface Configuring the Ethernet Interface 1 On the main screen...

Page 46: ...Enter button Select the Gateway Address field The keypad appears Enter a unique Gateway Address using the keypad and choose the green Enter button 3 When you have finished choose the green CheckMark icon 4 You must reset the laser once the Ethernet setting has been changed Restoring Local Control Commands sent over the IEEE GPIB RS 232 or Ethernet interface will switch the laser into remote mode a...

Page 47: ...aser When programming for the laser keep the following rules in mind For IEEE 488 issue all commands using the IBWRT function call To read the controller s response use the IBRD function call For IEEE 488 a command is not parsed until a hardware EOI is detected IEEE 488 For RS 232 operation end each command with a carriage return 0x0c Numbers may contain at most 15 characters The number 1550 will ...

Page 48: ...to the output buffer a first in first out FIFO buffer with a capacity for 5 outgoing messages You will need to send a separate command to read the response from the buffer The controller does not echo commands When the controller is first turned on all computer control commands other than OPC will receive the response Initializing The controller returns OK for properly executed set commands If una...

Page 49: ...he commands are case insensitive If the syntax shown is SOURce CURRent then the controller will accept any of the following SOUR CURR sour curr or sour current It will not accept commands such as SOURC CURR or sour curre Optional values and portions of syntax are indicated by square brackets Values to be input are indicated by angle brackets and are separated from the command either by a space or ...

Page 50: ...e from Detector Input 57 OUTP SCAN MAIN Starts a Maintenance Cycle 58 SYST PASS Set Instrument Password 58 Syntax Command Page OUTP on off Turn Laser Power On Off 58 OUTP Query Laser Power On Off 59 POW value Set Laser Output Power dBm 1 59 POW Query Laser Power Setpoint 1 60 POW TRIM value Set Power Trim 1 60 POW TRIM Read Power Trim 1 61 POW UNIT dBm mW Set Power Unit Type 1 61 POW UNIT Query Po...

Page 51: ...ue Set Wavelength Offset nm 1 66 WAVE OFFS Query Wavelength Offset 1 66 Syntax Command Page OUTP TRAC OFF Switch to Scan Mode 67 OUTP SCAN STAT Query Scan State 67 WAVE SLEW value MIN MAX Set Scan Speed nm sec 68 WAVE SLEW MIN MAX Query Scan Speed 68 PAUS value Set Pause ms Set delay between consecutive scans 69 PAUS Query Pause 69 WAVE DWEL value Set Dwell Time ms Set delay between steps of a ste...

Page 52: ...le Disable Wavelength Ramp 76 WAVE RAMP Query Wavelength Ramp Status 76 OUTP SCAN STAR value Start Scanning 77 OUTP SCAN STEP Next Step in Interactive Step Scan 77 OUTP SCAN RESE Reset Scan finish scan and reset 78 OUTP SCAN ABOR Abort Scan cancel scan and reset 78 OUTP SCAN TRIG Set Trigger Mode to Software Enabled 79 SCAN TRIG Query Trigger Mode State 79 Syntax Command Page Syntax Command Page C...

Page 53: ...order to access or set any parameter of these commands you must send the system password before sending these commands Syntax Command Page SYST ERR Read Reset and Clear Latest Error Flag 81 SYST ERR LOG List Errors 81 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 54: ...as five long term operations Turning on the system system initialization Turning on the diode OUTPut ON Scanning OUTPut SCAN START Resetting OUTPut SCAN RESEt Set Wavelength SOURce WAVElength Starting any of these operations clears the OPC sta tus bit When the laser returns to the start wave length or reaches the target wavelength the OPC status bit is set to 1 The bit is also set to 1 if the move...

Page 55: ...r interface The laser will use the current power setpoint when it switches to remote control The front panel dis plays will change as sensed Target values can differ by up to 3 due to component variations EXT returns control to the external front panel controls The laser power will return to the last level set from the front panel Example SYST MCON INT OK The laser switches to remote mode and the ...

Page 56: ... VOLTage LEVel AUXiliary Description Returns the voltage detected at the Detector Input on the back panel of the laser controller Note This is the only way this value can be read it cannot be read on the front panel The resolution for the Detector Input is 10 bits so the step size is 5 V 210 4 88 mV The response will be rounded to the nearest mV Response x xxx Range 0 to 5 Units volts V Example SE...

Page 57: ...0 characters Default pass word 1234 Example Change the password to 5678 SYST PASS 5678 OK sets the laser controller password to 5678 Turn Laser Power On Off Command Syntax OUTPut STATe ON OFF 1 0 Description Turns the laser on or off When turning the laser on the light in the front panel s Laser Power switch will flash for five seconds before the power is turned on Argument OFF ON 0 or 1 0 or OFF ...

Page 58: ...n Sets the power level This command will not turn on power to the laser Changes mad1e during a scan will not affect the scan Argument x x Range See Appendix C Specifications on page 95 Units dBm or mW depending on the power unit set ting chosen See Set Power Unit Type on page 61 Note Power is wavelength dependent You may not be able to achieve the set power at all wavelengths See Appendix C Specif...

Page 59: ...ple POW 2 8 Laser output is set to 2 8 dBm Set Power Trim Syntax SOURce POWer TRIM value Description Allows you to calibrate the output power to an exter nal power meter Note The laser power must be off to change the trim Argument x xx Range 0 5 dBm Example The power level shown on the front panel is off when measured by an external power meter so you want to increase the output power to 0 40 POW ...

Page 60: ...type to dBm or mW This com mand is password protected The system password must be set before sending this command Argument dBm or mW Example POW UNIT mW mW The power unit type has been set to milliwatts Query Power Unit Type Syntax SOURce POWer UNIT Description Reads the Power Unit type This command is pass word protected The system password must be set before sending this command Response dBm or ...

Page 61: ... the laser returns an out of range error and no other action is taken Argument x xxx MIN or MAX Range Within the laser s minimum and maximum wavelength range These values are laser depen dent use the Query Wavelength command to determine your laser s range Units nanometers nm Example Set the wavelength to 1525 nm WAVE 1525 OK The wavelength starts changing at the maximum rate until it reaches 1525...

Page 62: ...t of range error and no other action is taken Note see also SOURce WAVElength val MIN MAX Argument x xxx Range Within the laser s minimum and maximum wavelength range These values are laser depen dent use the Query Wavelength command to determine your laser s range Units nanometers nm Example Activate Track Mode and set the wavelength to 1525 nm OUTP WAVE 1525 OK Artisan Technology Group Quality I...

Page 63: ...UNIT nm OK Query Wavelength Unit Type Syntax SOURce WAVElength UNIT Description Reads the wavelength unit type nm or THz Example Set the Wavelength unit type to nanometers WAVE UNIT nm Set Wavelength Resolution Syntax SOURce WAVElength RESolution HI LOWW Description Sets the Wavelength resolution to HI or LOW If the resolution is set to HI the laser will display 0 0001 nm If the resolution is set ...

Page 64: ...ill display 0 001nm Example WAVE RES HI the wavelength resolution is set to high Query Wavelength Syntax SOURce WAVElength MIN MAX Description Queries the wavelength setpoint for track mode or the minimum or maximum available wavelengths Response x xxxx Units nanometers nm Example WAVE 1525 2552 The wavelength is set to 1525 2552 nm WAVE MIN 1500 0000 The minimum wavelength is 1500 0000 nm Artisan...

Page 65: ...nt panel is 0 2 nm more than the reading on the meter WAVE OFFS 0 2 OK You will not notice a difference without using an external wavelength meter Query Wavelength Offset Syntax SOURce WAVElength OFFSet Description Checks the value of the wavelength offset The units are in nanometers Response x xxxxx Units nanometers nm Example WAVE OFFS 0 03000 The wavelength has been offset by 0 030 nm from the ...

Page 66: ...ff track mode and set the laser to the start wavelength in scan mode OUTP TRAC OFF OK Query Scan State Syntax OUTPut SCAN STATe Description Reads the scan state of the laser Response x x 0 The laser is in the process of performing that number of scans x 0 The laser is in scan mode waiting at the start wavelength x 1 The laser is repeatedly running swept scans x 2 The laser is in track mode x 3 The...

Page 67: ... mode the motor moves at the maximum rate Changes made during a scan will not take effect until the current scan finishes or is cancelled and a new scan is started Argument x MIN or MAX Range 1 100 Units nanometers per second nm s Example Set the scan speed to 15 nm s WAVE SLEW 15 OK Query Scan Speed Syntax SOURce WAVElength SLEWrate MIN MAX Description Checks the set value of the scan speed Respo...

Page 68: ...uses before performing the next scan Argument x x will round to nearest integer Units milliseconds ms Range 0 to 4x109 Example Set a 1 5 second pause between consecutive scans PAUS 1500 OK Query Pause Syntax SOURce WAVElength PAUSe Description Checks the delay between consecutive scans Response x Units milliseconds ms Example PAUS 800 The laser is set to pause for 800 ms between scans Artisan Tech...

Page 69: ...s ms Range 0 to 8x106 Example Set a 3 second pause between steps of a step scan WAVE DWEL 3000 OK Query Dwell time Syntax SOURce WAVElength DWELl Description Checks the delay between steps of an automated step scan Response x Units milliseconds ms Example WAVE DWEL 3000 The laser is set to pause for 3000 ms between steps Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www...

Page 70: ...r s operating range The minimum and maximum values are laser dependent See Query Wavelength on page 65 Units nanometers nm Example Set scans to start at 1530 nm WAVE STAR 1530 OK Query Starting Wavelength Syntax SOURce WAVElength STARt Description Queries the starting wavelength for scans Note If the wavelength ramp is enabled scans will start 2 nm before this wavelength See page 26 for more on th...

Page 71: ...g range The minimum and maximum values are laser dependent See Query Wavelength above Units nanometers nm Example Set scans to stop at 1560 nm WAVE STOP 1560 OK Query Stopping Wavelength Syntax SOURce WAVElength STOP Description Queries the ending wavelength for scans Note If the wavelength ramp is enabled the laser will stop scanning 2 nm after the stop wavelength See page 26 for more on the ramp...

Page 72: ...e maximum value is the difference between the laser s minimum and maximum wavelengths Units nanometers nm Example Set the laser to tune in 25 nm steps this only applies to step scan mode WAVE STEP 25 OK Query Step Size Syntax SOURce WAVElength STEP Description Queries the step size Response x xxxx Units nanometers nm Example WAVE STEP 25 0000 In step scan mode the laser will tune in 25 nm incremen...

Page 73: ...n the laser s start and stop wavelengths To ensure accurate triggers either enable the wave length ramp or set the triggers at least 2 nm away from the start wavelength Units nanometers nm Example Send a trigger pulse when the scan crosses 1552 655 nm WAVE TRIG A 1552 655 OK Query Trigger A Syntax SOURce WAVElength TRIGger A Description Queries the trigger A wavelength Response x xxxx Units nanome...

Page 74: ...uld be between the laser s start and stop wavelengths To ensure accurate triggers either enable the wave length ramp or set the triggers at least 2 nm away from the start wavelength Units nanometers nm Example Send a trigger pulse when the scan crosses 1559 25 nm WAVE TRIG B 1559 25 OK Query Trigger B Syntax SOURce WAVElength TRIGger B Description Queries the trigger B wavelength Response x xxxx U...

Page 75: ...eed The laser then tunes at a constant rate through the stop wavelength and uses the ramp to decelerate to a stop The default setting for the ramp is disabled Argument 0 1 ON or OFF 1 or ON enables the ramp 0 or OFF disables it Example Enable the wavelength ramp WAVE RAMP 1 OK Query Wavelength Ramp Status Syntax SOURce WAVElength RAMPenable Description Checks the status of the 2 nm wavelength ramp...

Page 76: ...avelength x 0 Run that number of continuous scans x 1 Repeatedly run swept scans until scanning is cancelled or aborted x 3 Run one automated step scan x 4 Run one interactive step scan Example Run 25 swept scans OUTP SCAN STAR 25 OK Next Step Syntax OUTPut SCAN STEP Description In interactive step scan mode tunes the laser to the next step as defined by the step size page 73 If the next step is p...

Page 77: ...e Complete the current scan and return to ready mode at the start wavelength OUTP SCAN RESE OK Abort Scan Syntax OUTPut SCAN ABORt Description Immediately cancels the current scan and sets the laser to the start wavelength This is similar to the Reset Scan command except that the current scan is not completed If the laser is in track mode it will switch to scan mode Example Cancel the current scan...

Page 78: ...r Mode is hardware enabled 0 if Trigger Mode is disabled 1 if Trigger Mode is software enabled Example SCAN TRIG 0 Trigger Mode is disabled Set Diode Current Syntax SOURce CURRent LEVel DIODe MIN MAX val Description Sets laser to the specified minimum diode current maximum diode current or the specified diode cur rent This command will only work in Constant Current Mode Argument MIN or MAX x xxx R...

Page 79: ...x xxx mA Switch Laser Mode Syntax SYSTem LCONstpwr 1 0 Description Reads laser mode Argument 0 Constant Power Mode 1 Constant Current Mode Example SYST LCON 0 OK Read Laser Mode Syntax SYSTem LCONstpwr Description Reads laser mode Argument 0 Constant Power Mode 1 Constant Current Mode Example SYST LCON 1 Laser was set to Constant Current Mode Artisan Technology Group Quality Instrumentation Guaran...

Page 80: ...ets the error and clears the error flag Example SYST ERR 0 No error found List Errors Syntax SYSTem ERRor LOG Description Lists the last 16 errors from the latest to the oldest Example SYST ERR LOG List of last 16 Errors latest on TOP Error 30 Error 10 Error 15 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 81: ...82 Computer Control NEW FOCUS Inc Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 82: ...nces onpage 85 which uses a diffraction grating at grazing incidence to provide wavelength selectivity Essential to the performance of tunable external cavity diode lasers ECDLs is a high quality anti reflection AR coating on the front facet of the diode The AR coating turns the diode into purely a gain element A collimating lens directs the output of the diode across a diffraction grating at graz...

Page 83: ...he end mirror causes parameters in both equations to change An appropriately selected point of rotation synchronizes the two such that the cavity length remains the same number of half wavelengths long as the mirror is being rotated Thus mode hop free tuning is achieved When this condition is not met the lasing wavelength will periodically hop from one mode to the next e g from N to N 1 as the las...

Page 84: ...an and H J Metcalf Spectrally narrow pulsed dye laser without beam expander Applied Optics vol 17 pages 2224 2227 1978 M G Littman Single mode operation of grazing incidence pulsed dye laser Optics Letters vol 3 pages 138 140 1978 M G Littman Single mode pulsed tunable dye laser Applied Optics vol 23 pages 4465 4468 1984 K Liu and M G Littman Novel geometry for single mode scanning of tunable lase...

Page 85: ...86 Principles of Operation NEW FOCUS Inc Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 86: ...nctions See Command Summary on page 51 for the list of commands that are password protected Screen controls that are password protected will require password entry before allowing access Computer Control Doesn t Work If you are using the IEEE GPIB interface make sure the laser is set to the same device address as your software is requesting see page 44 If you are using the RS 232 interface make su...

Page 87: ...nd stop wavelengths Another 2 nm ramp after the stop wavelength is used to slow down the motor See page 76 for information about using the computer interface to enable or disable the ramp See page 26 for information about using the front screen controls to enable or disable the ramp If the wavelength display does not match the wavelength measured by an external wavelength meter you can recalibrate...

Page 88: ...ff power to the system and allow the laser time to adjust to the new climate time will vary depending on the temperature of the previous environment If this problem persists contact New Focus technical support Triggers are Inconsistent The normal timing jitter of the triggers is within 150 µs Due to timing issues relating to the start wavelength the trigger wavelengths and the scan speed you may e...

Page 89: ...avelength see page 66 Error Description E 1 Key Jam E 9 Motor temperature too high E 10 Laser cavity temperature too high E 20 Over current protection E 21 Interlock error or over power protection If you are not using the safety interlock feature page 12 check to make sure the jumper on the back of the controller is securely in place E 30 Motor controller error E31 Printing error Paper Out E32 Pri...

Page 90: ...nada use our toll free number 1 866 NUFOCUS 1 866 683 6287 For quickest response ask for Technical Support and have your model and serial number available The model and serial number can be read from the certification label on the back panel of the laser You can also send technical questions by email directly to our Technical Support department at techsupport newfocus com We will typically respond...

Page 91: ...92 Customer Service NEW FOCUS Inc Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 92: ...s product conforms to the applicable requirements of 21 CFR 1040 10 and 1040 11 at the date of manufacture 2584 Junction Ave San Jose CA 95134 1902 CAUTION Risk of electric shock do not remove cover Refer servicing to qualified service personnel 100 240 VAC 4 3 1 7A 48 66 Hz Input VAC Fuse 100 120 5 0 A T 220 240 2 5 A T WARNING For continued protection against fire hazard replace only with the sa...

Page 93: ...If you have trouble communicating with the laser over the RS 232 port you may need to use a null modem adapter or cable Figure 15 RS 232 Female 9 Pin D Connector 9 8 7 6 5 4 3 2 1 Gnd Rx Tx Pin Name Description 1 Not Connected 2 Rx Data Received by laser 3 Tx Data Transmitted from laser 4 Not Connected 5 Ground Digital Ground Line 6 9 Not Connected Artisan Technology Group Quality Instrumentation ...

Page 94: ...0 1620 nm Power Repeatability 7 0 01 dB 0 01 dB Power Stability 3 0 01 dB 0 01 dB Amplified Spontaneous Emission ASE 8 40 dB 4 45 dB 4 1460 1525 nm 70 dB 4 90 dB 5 Integrated Dynamic Range 8 55 dB 6 60 dB 6 7 1540 1620 nm Side Mode Suppression Ratio 7 50 dB 50 dB Control Pad Icon Based Touch Screen Icon Based Touch Screen Control Pad Cord Length 4 feet 4 feet Fiber Connector FC APC FC APC Fiber Ty...

Page 95: ... Temperature 15 to 35 ºC 15 to 35 ºC Storage Temperature 20 ºC to 70 ºC 20 ºC to 70 ºC Shock Vibration ISTB Procedure 2B ISTB Procedure 2B Operating Humidity 80 RH non condensing 80 RH non condensing Warm Up Time 45 minutes 45 minutes Size 19 Rack Mount 3U high 19 Rack Mount 3U high Viewing the laser output with certain optical instruments for example eye loupes magnifiers and microscopes within a...

Page 96: ... 7 0 01 dB 0 01 dB Power Stability 3 0 01 dB 0 01 dB Amplified Spontaneous Emission ASE 8 40 dB 4 45 dB 4 1460 1525 nm 70 dB 4 90 dB 5 Integrated Dynamic Range 8 55 dB 6 60 dB 6 7 1460 1525 nm Side Mode Suppression Ratio 7 50 dB 50 dB Control Pad Icon Based Touch Screen Icon Based Touch Screen Control Pad Cord Length 4 feet 4 feet Fiber Connector FC APC FC APC Fiber Type Polarization Maintaining P...

Page 97: ...m rated power Storage Temperature 20 ºC to 70 ºC 20 ºC to 70 ºC Shock Vibration ISTB Procedure 2B ISTB Procedure 2B Operating Humidity 80 RH non condensing 80 RH non condensing Warm Up Time 45 minutes 45 minutes Size 19 Rack Mount 3U high 19 Rack Mount 3U high Viewing the laser output with certain optical instruments for example eye loupes magnifiers and microscopes within a distance of 100 mm may...

Page 98: ...t Power 6 dBm 1 dBm 1290 1340 nm 1 dBm 1260 1340 nm Power Repeatability 7 0 01 dB 0 01 dB Power Stability 3 0 01 dB 0 01 dB Amplified Spontaneous Emission ASE 8 40 dB 4 45 dB 4 1290 1340 nm 70 dB 4 90 dB 5 Integrated Dynamic Range 8 55 dB 6 60 dB 6 7 1290 1340 nm Side Mode Suppression Ratio 7 50 dB 50 dB Control Pad Icon Based Touch Screen Icon Based Touch Screen Control Pad Cord Length 4 feet 4 f...

Page 99: ...e IEEE RS232C Ethernet Keyboard and Mouse Operating Temperature 15 to 35 ºC 15 to 35 ºC Storage Temperature 20 ºC to 70 ºC 20 ºC to 70 ºC Shock Vibration ISTB Procedure 2B ISTB Procedure 2B Operating Humidity 80 RH non condensing 80 RH non condensing Warm Up Time 45 minutes 45 minutes Size 19 Rack Mount 3U high 19 Rack Mount 3U high Viewing the laser output with certain optical instruments for exa...

Page 100: ...Swept Wavelength Tunable Laser Source Appendices 101 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 101: ...epeatability 7 0 01 dB Power Stability 3 0 01 dB Amplified Spontaneous Emission ASE 8 35 dB 4 45 dB 4 965 990 nm Integrated Dynamic Range 8 Side Mode Suppression Ratio 7 50 dB Control Pad Icon Based Touch Screen Control Pad Cord Length 4 feet Fiber Connector FC APC Fiber Type Polarization Maintaining PM TTL Triggers 2 Settable Triggers Computer Interface IEEE RS232C Ethernet Keyboard and Mouse Ope...

Page 102: ... Signal to total ASE 0 5 nm from carrier 7 Typical 8 Measurement taken at maximum rated power Shock Vibration ISTB Procedure 2B Operating Humidity 80 RH non condensing Warm Up Time 45 minutes Size 19 Rack Mount 3U high Specification TLB 6500 H 09 Viewing the laser output with certain optical instruments for example eye loupes magnifiers and microscopes within a distance of 100 mm may pose an eye h...

Page 103: ...nia based products can damage the surface Never spray the LCD front screen with cleaning solution directly Cleaning the Back Panel Connectors To clean the Back Panel connectors see Figure 4 1 Remove the AC power cord from Power Module 2 Scrub the connectors with a small brush dipped in isopropyl alcohol 91 3 Allow 30 minutes for the alcohol to dry completely before reconnecting the AC power cord a...

Page 104: ...ree absorbent tipped applicator into cleanroom grade alcohol and swipe the tip of the output ferrule with a circular motion 9 Apply compressed air directly to the output ferrule and the uninstalled Laser FC Adapter 10 Reinstall the Laser FC Adapter Make sure the FC Adapter key mates with its corresponding key slot in the connector 11 Measure Laser Output by using any type of power measurement devi...

Page 105: ...106 Appendices NEW FOCUS Inc Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com ...

Page 106: ...quipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentation Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate representative or authorized distributor for any manufacturer listed herein We re here to make your life easier How...

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