User’s Guide
Keysight N777-C Series
Tunable Laser Family
N7776C Tunable Laser Source
N7778C Tunable Laser Source
N7779C Tunable Laser Source
Страница 1: ...User s Guide Keysight N777 C Series Tunable Laser Family N7776C Tunable Laser Source N7778C Tunable Laser Source N7779C Tunable Laser Source...
Страница 2: ...equire ments beyond those set forth in the EULA shall apply except to the extent that those terms rights or licenses are explicitly required from all providers of commercial computer software pursuant...
Страница 3: ...ed from temperature extremes and changes in temperature that may cause condensation within it The operating temperature is from 10 C to 35 C The storage temperature is from 40 C to 70 C Option D00 sta...
Страница 4: ...n Communications and Media Authority This symbol is a South Korean Class A EMC Declaration with the product identification code R R Kst 3E18526 R Identification of authorization prefix R Identificatio...
Страница 5: ...oducts may be downloaded from the Web Go to http www keysight com go conformity You can then search by product number to find the latest Declaration of Conformity Safety Symbol Description This produc...
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Страница 7: ...iew 14 Laser Safety Information 15 Initial Safety Information for Keysight N777 C Family Lasers 15 Laser Safety Labels 16 Laser Safety Symbols 17 Operating Environment 18 Handling the Instrument 20 St...
Страница 8: ...ption for CWDM8 Component Testing 29 N777 C Front and Rear Panel 30 Input Output Signals 31 Optical Output 32 LAN Interface 34 The LAN LED 34 The LAN Reset button 34 USB Interface 35 Powering Up the I...
Страница 9: ...pped mode 52 Return loss 53 Side mode suppression ratio 53 Signal to source spontaneous emission SSE ratio 54 Signal to total source spontaneous emission ratio 55 Wavelength range 55 Wavelength repeat...
Страница 10: ...at If You Forget Your Password 77 How to perform Realignment 77 Lambda Zeroing 78 Update Rate 79 Reboot Device 80 How to Configure LAN 80 5 N777 C Instrument s Front Panel Display N777 C Instrument s...
Страница 11: ...Cleaning Instructions 108 Safety Precautions 108 Why is it important to clean optical devices 108 What materials do I need for proper cleaning 109 General Cleaning Procedure 111 Further Cleaning Infor...
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Страница 13: ...ight N777 C Series Tunable Laser Family User s Guide 1 General Operating Considerations Overview 14 Laser Safety Information 15 Operating Environment 18 Handling the Instrument 20 Obtaining Source Cod...
Страница 14: ...onnect the power cord either at the rear power inlet or at the AC line power source receptacle One of these must always be accessible If the instrument is in a cabinet it must be disconnected from the...
Страница 15: ...215 N7776C 116 N7778C 116 N7779C 116 N7776C 114 N7778C 114 N7779C 114 N7776C 113 N7778C 113 N7779C 113 Laser type EC Laser InGaAsP EC Laser InGaAsP EC Laser InGaAsP EC Laser InGaAsP EC Laser InGaAsP W...
Страница 16: ...nces look into the end of an optical cable attached to the optical output when the instrument is operational The laser radiation can seriously damage your eyesight Do not enable the laser when there i...
Страница 17: ...l Operating Considerations 1 Laser Safety Symbols The apparatus will be marked with this symbol when it is necessary for the user to refer to the instruction manual in order to protect the apparatus a...
Страница 18: ...circulate through it freely Operating Position When operating the instrument choose a location that provides at least 75 mm 3 inches of clearance at the rear and at least 25 mm 1 inch of clearance at...
Страница 19: ...Keysight N777 C Series Tunable Laser Family User s Guide 19 General Operating Considerations 1 Figure 2 Operating Position of the Instrument 25 mm 1 inch 25 mm 1 inch 75 mm 3 inches...
Страница 20: ...on within it The Keysight N777 C Tunable Laser System can be stored either in its operating position or on its back legs The back legs protect the connectors on the back panel from damage Carrying the...
Страница 21: ...Laser Family User s Guide 21 General Operating Considerations 1 To rack mount a single instrument order adapter kit N7799C 2CM Figure 4 shows an example where an instrument is mounted on a rack Figure...
Страница 22: ...the extent required by the applicable open source license s Keysight makes source code available upon request To request source code please contact Keysight Support at www keysight com main support js...
Страница 23: ...s Guide 2 Getting Started Initial Inspection 24 Power Supply Requirements 26 N777 C Series of Tunable Laser Family 28 N777 C Front and Rear Panel 30 LAN Interface 34 Powering Up the Instrument 36 Conn...
Страница 24: ...ologies Sales Service Office The Keysight Technologies Sales Service Office will arrange for repair or replacement of the unit without waiting for settlement of the claim against the carrier Return Sh...
Страница 25: ...ct control panel with cardboard Seal shipping container securely Mark shipping container FRAGILE to encourage careful handling In any correspondence with Keysight refer to the instrument by model numb...
Страница 26: ...ree wire power cable When connected to an appropriate AC power receptacle this cable earths the instrument cabinet The power switch allows you to switch between stand by mode and power on mode Figure...
Страница 27: ...27 Getting Started 2 When the instrument is in stand by mode the Power LED is orange When the instrument is powered on the Power LED is green The AC power requirements are summarized on the rear panel...
Страница 28: ...ce For further details on its features application and specifications refer to the product datasheet available on www keysight com The Keysight N7776C Top Line Tunable Laser Source The new Keysight N7...
Страница 29: ...or transmission experiments O band option for Silicon Photonics Integrated Photonics Applications The N777 C option 113 covers the wavelength range from 1240 nm to 1380 nm for an important set of app...
Страница 30: ...N777 C Series Tunable Laser Source Figure 7 shows the front panel of the N777 C Series Tunable Laser Source with the optional display unit Option D01 Figure 7 Front Panel of the N777 C Instrument wit...
Страница 31: ...ector on the front panel of the Keysight N777 C An absolute maximum of 5 V can be applied as an external voltage to the BNC connector CAUTION Rear Panel There is one input BNC connector Trigger In Thi...
Страница 32: ...ectors The N777 C Series Tunable Laser instruments are outfitted with an angled polished connector Angled contact connectors help you to control return loss With angled fiber end faces reflected light...
Страница 33: ...ould connect straight contact fiber end connectors with neutral sleeves to straight contact connectors and connect angled contact fiber end connectors with green sleeves to angled contact connectors C...
Страница 34: ...connected directly to a PC The LAN Reset button This recessed button has two functions Pressing the button briefly invokes a preset of the instrument and restores default measurement settings This is...
Страница 35: ...is a USB device with a USB Type B connector which is available on the rear side of the instrument NOTE It is recommended to use the Keysight IO Libraries Suite to enable instrument communication for a...
Страница 36: ...ering Up the Instrument When you power on the instrument the LEDs on the front panel show the various stages of the instrument Power LAN Status Yellow Standby mode Searching for LAN Warming Up Green O...
Страница 37: ...n the instrument 2 Connect the PC to the instrument using a USB cable 3 The operating system will detect and display the new instrument as a new drive 4 Double click on this new drive It will show a s...
Страница 38: ...ing start the Keysight Connection Expert software The Discovery Service automatically discovers LAN instruments on the same subnet as the PC on which the service is running 3 To add LAN instruments to...
Страница 39: ...utside of the local subnet a Click select LAN Instrument from the context list This opens the list of discovered LAN instruments b Click the Enter Address tab c Enter the LAN address or host name and...
Страница 40: ...40 Keysight N777 C Series Tunable Laser Family User s Guide 2 Getting Started 5 Linux or macOS can use the zeroconf mdns discovery service with tools like Avahi GNU Linux or Bonjour Mac...
Страница 41: ...ffers the N777 C Tunable Laser Source instruments with an optional display Figure 12 shows the user interface accessed in the instrument s display Figure 12 N777 C Instrument User Interface For detail...
Страница 42: ...13 shows the web interface of the N777 C Option D00 non display instruments where the user interface can be used in a web browser on your computer Figure 13 N777 C Web Interface For details on the we...
Страница 43: ...erature and humidity 48 Output isolation 48 Polarization extinction ratio 48 Power flatness versus wavelength 49 Power linearity 50 Power repeatability 50 Power stability 51 Relative intensity noise R...
Страница 44: ...the logging function Stepped mode In stepped mode the tunable laser source is operated statically so that a user s measurement is made at a fixed wavelength of the tunable laser source When tuning to...
Страница 45: ...op Absolute wavelength accuracy stepped mode The maximum difference between the displayed wavelength and the actual wavelength of the tunable lase source Wavelength is defined as wavelength in vacuum...
Страница 46: ...power constant power setting constant temperature no mode hop Other conditions as specified Measurement Reference sweep speed value 0 5 nm s Effective linewidth The time averaged 3 dB width of the op...
Страница 47: ...zer and the linewidth calculated from the heterodyne spectrum Alternatively Using a heterodyning technique The output of the laser under test is mixed on a wide bandwidth photo detector with another l...
Страница 48: ...olator in the backward direction Measurement This characteristic cannot be measured from outside the instrument It is based on known isolator characteristics Polarization extinction ratio Specifies th...
Страница 49: ...tinction ratio Power flatness versus wavelength Specifies half the span in dB between the maximum and the minimum actual power levels of the tunable laser source when changing the wavelength Figure 18...
Страница 50: ...s Uninterrupted tunable laser source output power constant wavelength setting constant temperature Other conditions as specified Power repeatability The uncertainty in reproducing the power level afte...
Страница 51: ...Power stability Conditions Time span as specified Uninterrupted tunable laser source output power constant wavelength and power level settings constant temperature Other conditions as specified Relati...
Страница 52: ...in Continuous sweep mode the dynamic wavelength accuracy is half the span between the maximum and the minimum value of all differences Figure 21 Relative wavelength accuracy continuous sweep mode Con...
Страница 53: ...nt Using a wavelength meter averaging time 1 s Return loss Specifies the ratio of the optical power incident to the tunable laser source output port at the wavelength set on the tunable laser source t...
Страница 54: ...nm window around the signal wavelength where 1 nm around the signal wavelength are excluded expressed in dB per specified bandwidth Figure 23 Signal to source spontaneous emission ratio Conditions Ou...
Страница 55: ...pontaneous emission and excluding the remnant signal For the low SSE output if applicable with a fiber Bragg grating inserted between the tunable laser source and the OSA to suppress the signal thereb...
Страница 56: ...alyzing the variation of the determined interpolated wavelength of the peak Wavelength repeatability stepped mode The random uncertainty in reproducing a wavelength after changing and re setting the w...
Страница 57: ...ver time expressed as half the span between the maximum and minimum of all wavelengths Conditions Time span as specified uninterrupted tunable laser source output power constant wavelength and power l...
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Страница 59: ...Keysight N777 C Series Tunable Laser Family User s Guide 4 N777 C Web Interface Reference N777 C Web Interface 60 Controlling N777 C Instruments 62 How to Use Auxiliary Functions 74...
Страница 60: ...ious tabs that help the user to control the instruments Home This tab displays the various instrument settings For details refer How to Get Current Instrument Settings on page 74 Control Instrument Th...
Страница 61: ...C Web User Interface Reference 4 Configure LAN This tab displays the current LAN configuration In addition this tab also allows you to edit the current LAN configuration For details refer to How to C...
Страница 62: ...rface Reference Controlling N777 C Instruments Control Instrument Tab The Control Instrument tab is used to control the N777 C instruments The Control Instrument tab provides the following features Di...
Страница 63: ...gth button 2 Use the left or right arrows to move the position of the cursor pointer either to the left or right 3 Use the up or down arrows to increase or decrease the wavelength 4 Click on the unit...
Страница 64: ...d with EXP on the power display For details see How to Avoid Access Power on page 66 Working with Markers To add a marker double click at a point on the graph where you want to add the marker A small...
Страница 65: ...nstrument has a permitted wavelength range This range is greater than the specified range The permitted wavelength range varies for each Tunable Laser instrument You can set the wavelength to any valu...
Страница 66: ...r than the laser diode can produce at the selected wavelength To avoid this you can reduce the optical output power click Set Pmax in the Measurement Setting option to select the highest permissible p...
Страница 67: ...peat mode see How to Set the Repeat Mode on page 68 Sweep Speed the speed of a continuous sweep Cycles the number of times the sweep is repeated Dwell the amount of time spent at the wavelength during...
Страница 68: ...Twoway if you want to start every odd sweep cycle at Start and to start each even sweep cycle at Stop Select Oneway if you want to start every sweep cycle at Start and to end every sweep cycle at Sto...
Страница 69: ...onstant for the whole sweep How to Perform a Sweep There are three sweep modes Stepped which dwells at wavelengths that are separated by a certain step size Continuous which sweeps continually at the...
Страница 70: ...g trigger configuration modes are available 1 Disabled select this mode if you do not want to use triggering In this case input and output connectors are disabled 2 Default select this mode if you wan...
Страница 71: ...put trigger automatically generates an input trigger or using the TRIGger1 command see your Programming Guide How to Use Output Triggering You can configure your Tunable Laser instrument to output a t...
Страница 72: ...Wavelength Locking You can choose wavelength locking as the modulation source so the change in output wavelength is roughly proportional to the voltage you apply to the input BNC connector on the fro...
Страница 73: ...nstrument page click to Settings Measurement Settings and then go to Shutter Open option 2 Click on the Shutter Open button the turn ON OFF the high power laser Ensure that your device is unlocked 3 A...
Страница 74: ...This tab displays the following settings Description Displays the instrument description such as instrument s model no serial no firmware version and description of the current instrument VISA Instru...
Страница 75: ...n indicator available on the N777 C Home tab The Status LED on the front panel of the connected instrument will start flashing How to Capture an Image of the Graph The Get Image tab on the N777 C web...
Страница 76: ...te the target file and click Open The settings will be loaded in the instrument Logging In Out of the N777 C Web Interface The login screen allows the authorized users to control the N777 C instrument...
Страница 77: ...rd 2 Enter the current password the default password is blank 3 Enter the new password 4 Click the Change Password button The password will be changed What If You Forget Your Password If you forget yo...
Страница 78: ...ength This wavelength may drift due to a change in temperature and other environmental conditions The regulated wavelength and wavelength logging data remain accurate but the sweep may be offset from...
Страница 79: ...last Lambda Zero was performed Please wait until the Lambda Zeroing is completed Update Rate You can use the Update Rate feature to set the refresh rates in milliseconds for the instrument settings an...
Страница 80: ...Click on the Reboot System button This action will restart the instrument and take at least 180 seconds Please wait until the reboot process is completed How to Configure LAN Show the Current LAN Sett...
Страница 81: ...ure LAN tab also allows you to edit the currently used LAN settings To do so 1 Click on the Edit button The Edit Network Configuration page will appear as shown in the figure below WARNING Your connec...
Страница 82: ...set all LAN parameters to the factory default To do so 1 Click the Advance Options button available on Configure LAN tab The Advance Network Options page will appear NOTE For IP address and DNS server...
Страница 83: ...Reference 4 2 Click on the Reset button to reset all LAN parameters to the factory default WARNING Your browser connection to the instrument may be broken after executing the reset network configurat...
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Страница 85: ...Keysight N777 C Series Tunable Laser Family User s Guide 5 N777 C Instrument s Front Panel Display N777 C Instrument s Front Panel Display 86 Controlling N777 C Instruments 88...
Страница 86: ...nstrument s front panel provides the following elements Elements Caption Description Control Instrument This button opens the Control Instrument window which allows you to set the parameters to contro...
Страница 87: ...ion Configure LAN This button opens the Configure LAN window which displays the current LAN configuration and allows you to edit the current LAN configuration For details refer to How to Configure LAN...
Страница 88: ...Instrument s Front Panel Display Controlling N777 C Instruments Control Instrument Window To access the instrument settings and to manually control the instrument click Control Instrument present on t...
Страница 89: ...res Display Wavelength and Power Displays the instrument s current wavelength and power Changing Wavelength Power and Units Allows you to change the instrument s current wavelength power and their res...
Страница 90: ...e click on Done button 5 The unit button is a toggle button Click on this button to change the unit The allowed units for Wavelength are nm and THz The allowed units for Power are mW and dBm Wavelengt...
Страница 91: ...ength value by directly clicking on the Wavelength button For details see Changing Wavelength Power and Units on page 89 Every Tunable Laser instrument has a specified wavelength range This range is a...
Страница 92: ...ng on the Power button For details see Changing Wavelength Power and Units on page 89 How to Set the Power Unit Pressing the unit button allows you to switch either mW or dBm as the units in which pow...
Страница 93: ...the Setting option to select the highest permissible power for the selected wavelength click Set Pmax Sweep to select the highest permissible power for the selected wavelength sweep How to Perform a...
Страница 94: ...times the sweep is repeated Dwell the amount of time spent at the wavelength during each step for a stepped sweep Sweep Start the wavelength at which the sweep begins Sweep Stop the wavelength at whi...
Страница 95: ...The Repeat Mode determines how the instrument performs a multi cycle sweep Select Twoway if you want to start every odd sweep cycle at Start and to start each even sweep cycle at Stop Select Oneway i...
Страница 96: ...he whole sweep How to Perform a Sweep There are three sweep modes Stepped which dwells at wavelengths that are separated by a certain step size Continuous which sweeps continually at the speed you set...
Страница 97: ...ut trigger signals to external measurement instruments To view the Trigger window click on the Trigger VIEW tab The following window appears How to Set the Trigger Configuration The trigger level at t...
Страница 98: ...ther instrument almost simultaneously How to Use Input Triggering You can configure your N777 C Tunable Laser instrument to perform certain tasks when you apply a trigger to the Input Trigger Connecto...
Страница 99: ...nstrument to output a trigger when the instrument performs certain tasks To set your instrument s Output Trigger Configuration 1 From the Control Instrument window click Trigger VIEW tab 2 Use the men...
Страница 100: ...al to between 50 and 500 MHz typically Coherence control greatly reduces interference effects and therefore improves the power stability in sensitive test setups The N777 C instruments also allow adju...
Страница 101: ...he tunable laser instruments This helps in avoiding accidents that are caused due to laser To lock an instrument go to the Control Instrument window and click the Device Locked button to either lock o...
Страница 102: ...tings This window displays the following settings Description Displays the instrument description such as instrument s model no serial no firmware version and description of the current instrument VIS...
Страница 103: ...n configure LAN setting through the Configure LAN window To open the Configure LAN window click on the Configure LAN button The Configure LAN window displays the currently used LAN settings It display...
Страница 104: ...the figure below This dialog allows you to edit the following LAN configuration parameters Select the Use automatic configuration checkbox if you want to the system to use the automatic configuration...
Страница 105: ...age after 30 seconds to see the updated settings Changes in hostname and description require reboot or LAN restart to take effect WARNING Your connection to the instrument may be broken after executin...
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Страница 107: ...Keysight N777 C Series Tunable Laser Family User s Guide 6 Maintenance Cleaning Instructions 108 Further Cleaning Information 112 Firmware Upgrades 113 Contact Keysight Technologies 114...
Страница 108: ...ng procedures To prevent electrical shock disconnect the instrument from the mains before cleaning Use a dry cloth or one slightly dampened with water to clean the external case parts Do not attempt t...
Страница 109: ...ollowing standard equipment Dust and shutter caps Isopropyl alcohol Cotton swabs Soft tissues Compressed air Dust and shutter caps All of Keysight Technologies lightwave instruments are delivered with...
Страница 110: ...much pressure may scratch the surface and could cause your device to become misaligned It is advisable to rub gently over the surface using only a small circular movement Swabs should be used straigh...
Страница 111: ...clean the instrument housing Do not open the instruments as there is a danger of electric shock or electrostatic discharge Opening the instrument can cause damage to sensitive components and in addit...
Страница 112: ...Laser Family User s Guide 6 Maintenance Further Cleaning Information For further information on cleaning and safety matters for optical devices refer the following document https literature cdn keysi...
Страница 113: ...irmware for the N777 C series tunable laser instruments you require a PC running Windows 10 on it To update the firmware you need to download the current firmware which consist of two components Firmw...
Страница 114: ...the firmware update file on your local PC After the firmware has been updated the instrument will automatically restart itself with the new software During the update process the Status and the Activ...
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Страница 116: ...This information is subject to change without notice Keysight Technologies 2021 Edition 2 1 February 2021 www keysight com...
