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THORLABS SA201, Руководство по эксплуатации

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Spectrum Analyzer Controller

 

 

Page 3

 

Rev D, February 26, 2013

 

Chapter 1 

Overview 

The SA201 is specifically designed to control Thorlabs SA200 Series Fabry Perot 
Interferometers.  The controller generates a voltage ramp, which is used to scan 
the separation between the two cavity mirrors. The controller provides 
adjustment of the ramp voltage and scan time, allowing the user to choose the 
scan range and speed. An offset control is provided to allow the spectrum 
displayed on the oscilloscope to be shifted right or left. Another convenient 
feature of the controller is a zoom capability that provides a 1X, 2X, 5X, 10X, 
20X, 50X and 100X increase in the spectral display resolution. The output TTL 
level trigger allows the user to externally trigger an oscilloscope on either the 
beginning or midpoint of the ramp waveform. 

The SA201 also includes a high precision photodetector amplifier circuit used to 
monitor the transmission of the cavity. The amplifier provides an adjustable 
transimpedance gain of 10K, 100K, and 1M V/A when driving a high impedance 
load, such as an oscilloscope. Using the output sync signal from the controller, 
an oscilloscope can be used to display the spectrum of the input laser. The 
detector circuitry incorporates a blanking circuit, which disables the photodiode 
response during the falling edge of the saw tooth waveform. 

1.1.1. Parts 

List 

Below is a list of all components shipped with the SA201 Spectrum Analyzer 
Controller.  

•

 

SA201 Spectrum Analyzer Controller  

•

 Operating 

Manual 

 

•

  120 VAC US Power Supply Line Cord (with the SA201) or 230 VAC 

Power Supply Line Cord for Europe (with the SA201-EC) 

•

 

125 mA Fuse for use at 230 VAC operation (250 mA fuse installed in 
unit) 

1.1.2. 

Compatible Fabry-Perot Scanning Heads 

This product has been designed to be used with one of our SA200 or SA210 
Series Scanning Fabry-Perot Interferometers. Below is a list of available heads. 
Note this list is subject to change without notice. Please visit the website for the 
most current information. 

Содержание SA201

Страница 1: ...SA201 SA201 EC Spectrum Analyzer Controller Operating Manual ...

Страница 2: ... 1 Parts List 3 1 1 2 Compatible Fabry Perot Scanning Heads 3 Chapter 2 Description 5 Chapter 3 Operation 10 3 1 PD Blanking Circuit 10 3 2 Replacing the Fuse 11 1 1 3 Cleaning 12 Chapter 4 Recommended Setup 13 Chapter 5 Specifications 14 Chapter 2 Regulatory 17 Chapter 3 Thorlabs Worldwide Contacts 18 ...

Страница 3: ...w 6679 D02 Page 2 Table of Figures Figure 1 SA201 Front Panel Controls 5 Figure 2 Trigger Logic 7 Figure 3 Saw tooth Waveform left Triangle Waveform right 7 Figure 4 SA201 Rear Panel Connections 8 Figure 5 Recommended Setup Diagram 13 ...

Страница 4: ... to monitor the transmission of the cavity The amplifier provides an adjustable transimpedance gain of 10K 100K and 1M V A when driving a high impedance load such as an oscilloscope Using the output sync signal from the controller an oscilloscope can be used to display the spectrum of the input laser The detector circuitry incorporates a blanking circuit which disables the photodiode response duri...

Страница 5: ...2B 1275 2000 nm 1 5 GHz FSR SA200 14A 1450 1625 nm 1 5 GHz FSR SA200 18B 1800 2500 nm 1 5 GHz FSR Item Description SA210 3B 350 535 nm 10 GHz FSR SA210 5A 525 650 nm 10 GHz FSR SA210 5B 535 820 nm 10 GHz FSR SA210 7A 780 930 nm 10 GHz FSR SA210 8B 820 1275 nm 10 GHz FSR SA210 9A 900 1100 nm 10 GHz FSR SA210 12A 1250 1400 nm 10 GHz FSR SA210 12B 1275 2000 nm 10 GHz FSR SA210 14A 1450 1625 nm 10 GHz...

Страница 6: ...rent to voltage gain of 10K 100K and 1M V A while driving a Hi Z load such as an oscilloscope For better noise and performance characteristics it is recommended that a 50 W coax cable with a 50 Ω terminating resistor be used The Photodetector input and output BNC s are located on the rear panel DC Offset Control The DC Offset provides a continuously adjustable offset voltage over the range of 0 to...

Страница 7: ...ntrol allows the user to adjust the ramp amplitude from 1 to 30 V peak to peak using a 10 turn trim pot Note the ramp signal is added to the DC offset This means that when the offset is set to 0V the ramp will start a 0V and increase to the amplitude limit setting The amplitude is used to determine how far the mirror will be scanned or to set the spectral range of the optical head Rise Time Contro...

Страница 8: ... 1 to 45 V The output is capable of driving 0 6 µF piezo loads at a ramp rate of 1 ms over the full voltage range The output current is internally limited to prevent damage to the output drive Note the output performance specifications assume a Thorlabs Fabry Perot Interferometer module is connected Figure 3 Saw tooth Waveform left Triangle Waveform right ...

Страница 9: ... supplied photo detectors however it is possible to operate user supplied photo detectors To do so the BNC center contact must be connected to the photo detector cathode and the BNC shell must be connected to the photodiode anode unbiased operation If a biased detector is to be used the BNC shell must be connected to the bias ground and the bias voltage must be negative for the circuit to operate ...

Страница 10: ...0 Ω load connected Voltage Selector Switch The voltage selector switch allows the user to select the input line voltage The factory default setting is 100 115 VAC as shown in figure 4 To operate at 230 VAC this switch will have to be moved to the 230 V position The line fuse will also need to be changed to properly protect the unit See page 11 for detailed instructions ...

Страница 11: ...isconnect the scanning head or any piezo device from the SA201 output Disconnect the power cord Do not open the unit if the power cord is connected 1 Remove the two screws securing the enclosure cover with a Phillips head screwdriver The screws are located on the bottom side rear corners of the unit Do not lose the screws 2 Carefully remove the cover by sliding toward the rear of the unit 3 Locate...

Страница 12: ...he factory This must be installed when operating the unit at 100 115 VAC 125 mA Type T Slow Blow Fuse The 125 mA fuse is required for 230 V operation only Thorlabs supplies a 125 mA fuse with all of its SA201 units and must be installed when operating at 230 VAC Phillips Head Screwdriver 2 Preferred We do not recommend using electrically powered screwdrivers Fuse Replacement IMPORTANT Disconnect t...

Страница 13: ...5 VAC and 125 mA for 230 VAC 6 Replace the enclosure cover and secure with the enclosure screws Selecting the Line Voltage 1 Replace the line fuse as described above 2 Locate the voltage selector switch on the rear panel See page 9 3 Switch to the appropriate line voltage 4 Install the appropriate line cord 1 1 3 Cleaning The SA201 should only be cleaned with a soft cloth and a mild soap detergent...

Страница 14: ...igure 5 Recommended Setup Diagram PD AMPLIFIER OUTPUT INPUT TRIGGER CHANNEL 2 CHANNEL 1 OUTPUT TRIGGER 115 V VOLTAGE SELECT SA201 REAR PANEL OSCILLOSCOPE SA201 FRONT PANEL DETECTOR POWER SCAN CONTROLS SPECTRUM ANALYZER CONTROLER SELECT CALIBRATION AMPLITUDE RISETIME GAIN SA200 xB FSR x xGhz ...

Страница 15: ... b 26 mA Max Short Circuit Duration b Continuous Offset Adj Range 0 to 15 VDC Amplitude Adj Range 1 to 30 V Rise Time Adj Range c 0 01 to 0 1 s 1X Sweep Exp 1 to 10 s 100X Sweep Exp Sweep Expansion Settings 1X 2X 5X 10X 20X 50X 100X Sweep Scale Error d 0 5 Output Noise e 1 mVRMS 6 6 mVPP Trigger Characteristics Item SA201 Trigger Output Voltage TTL levels VOH RL 50 W 2 V Min VOL RL 50 W 0 5 V Max ...

Страница 16: ...ndwidth h 250KHz Noise RMS h 0 1 mV 10K 0 2 mV 100K 1 5 mV 1M Offset h 1 mV 10K 5 mV 100K 20 mV 1M Physical Features Item SA201 Dimensions W x H x D 5 8 x 2 8 x 12 5 147 mm x 71 mm x 317 5 mm Input and Output Connectors BNCs Offset Control 10 turn Potentiometer Amplitude Control 10 turn Trim pot Rise Time Control 10 turn Trim pot Sweep Expansion Control 7 Position Rotary Switch Photodiode Gain Con...

Страница 17: ...t will heat up causing stress to the electronics c The rise time adjustment range for each sweep setting is as follows 0 01 Sweep Expansion Setting to 0 1 Sweep Expansion Setting d Defined as the scaling error between 1X and any other gain settings ex 2X 0 5 e Measures with SA200 series scanning head connected to output f Ramp refers to the rising or scanning edge of the Output waveform g The gain...

Страница 18: ...products such as Pure OEM products that means assemblies to be built into a unit by the user e g OEM laser driver cards Components Mechanics and optics Left over parts of units disassembled by the user PCB s housings etc If you wish to return a Thorlabs unit for waste recovery please contact Thorlabs or your nearest dealer for further information 2 1 Waste Treatment is Your Own Responsibility If y...

Страница 19: ...bs com Scandinavia Thorlabs Sweden AB Mölndalsvägen 3 412 63 Göteborg Sweden Tel 46 31 733 30 00 Fax 46 31 703 40 45 www thorlabs com Email scandinavia thorlabs com France Thorlabs SAS 109 rue des Côtes 78600 Maisons Laffitte France Tel 33 0 970 444 844 Fax 33 0 825 744 800 www thorlabs com Email sales fr thorlabs com Brazil Thorlabs Vendas de Fotônicos Ltda Rua Riachuelo 171 São Carlos SP 13560 1...

Страница 20: ...www thorlabs com ...

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