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d2:laser_servo [2019/07/15 22:50] – [Laser Lock Troubleshooting] Michael Radunskyd2:laser_servo [2019/09/06 17:35] – [Right Side Panel] Michael Radunsky
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 Located at the top of the front panel, the monitor section contains 6 BNC outputs for monitoring various signals used by the Laser Servo. The logic of the monitors is shown in <imgref image1> Open a {{d2:d2-125:d2-125_monitor_logic.pdf|pdf of this image }}. Located at the top of the front panel, the monitor section contains 6 BNC outputs for monitoring various signals used by the Laser Servo. The logic of the monitors is shown in <imgref image1> Open a {{d2:d2-125:d2-125_monitor_logic.pdf|pdf of this image }}.
  
-<WRAP center round box 420px><imgcaption image1|Monitor output logic>{{ d2:d2-125:d2-125_monitor_logic.jpeg?400|}}</imgcaption></WRAP>+<WRAP center round box 420px><imgcaption image1|Monitor output logic>{{ d2:d2-125:d2-125_monitor_logic.jpeg?600|}}</imgcaption></WRAP>
  
 **Error In** **Error In**
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 **Ramp Master / Slave (Jumper)** **Ramp Master / Slave (Jumper)**
  
-This jumper is only accessible by removing the right side panel (see above) and sets whether the ramp input is in master or slave mode. It is factory set to be in MASTER MODE. In SLAVE MODE (jumper off) the RAMP signal is generated externally and input through the back panel RAMP I/O port. In MASTER MODE (jumper on) the ramp is generated internally and is sent out to the RAMP I/O port for driving other D2-125 Laser Servos configured in SLAVE MODE.+This jumper is only accessible by removing the right side panel (see above) and sets whether the ramp input is in master or slave mode. It is factory set to be in MASTER MODE. In SLAVE MODE (jumper off) the RAMP signal is generated externally and input through the back panel RAMP I/O port. In MASTER MODE (jumper on) the ramp is generated internally and is sent out to the RAMP I/O port for driving other D2-125 Laser Servos configured in SLAVE MODE.   
 + 
 +The amplitude of the slave ramp is about -5x of the master ramp input (at slave Ramp Amp maximum).  The DC offset is applied after amplification.
  
 ====Lock Guard==== ====Lock Guard====
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 If you are having problems locking the laser, it is a good idea to not use the AUXILIARY SERVO OUTPUT as this complicates the system. Once you get the locking to work properly, you can reconnect this cable. If you are having problems locking the laser, it is a good idea to not use the AUXILIARY SERVO OUTPUT as this complicates the system. Once you get the locking to work properly, you can reconnect this cable.
  
-<imgref factory_settings> shows the nominal corner settings for locking the Vescent D2-100 to atomic spectroscopy.  If all else fails, return to these setting, turn down the gain and try again.+<imgref factory_settings> shows and <tabref factory_setting> lists the nominal corner settings for locking the Vescent D2-100 (or a Photodigm TOSA) to atomic spectroscopy.  If all else fails, return to these setting, turn down the gain and try again.
  
 <WRAP center round box 400px><imgcaption factory_settings|Factory settings for locking a D2-100> <WRAP center round box 400px><imgcaption factory_settings|Factory settings for locking a D2-100>
-{{ {{ d2:d2-125:factory_settings_red.png?direct&400 |}} |}}</imgcaption></WRAP>+{{ {{ d2:d2-125:factory_settings_red.png?direct&700 |}} |}}</imgcaption></WRAP> 
 + 
 +<WRAP center round box 60%><tabcaption factory_setting |D2-125 locking D2-100 or TOSA> 
 +| **Corner**                                                       | **Value**       | **Units** 
 +| First Integrator (high freq.)                                    | low freq.             | 
 +| First Integrator (low freq.)                                     | 10              | Hz         | 
 +| Second Integrator (high freq.)                                   | low freq.             | 
 +| Second Integrator (low freq.)                                    | 500             | Hz         | 
 +| Differential (high freq.)                                        | OFF             | 
 +| Differential (low freq.)                                         | 100              | kHz         | 
 + 
 +</tabcaption></WRAP>
  
  =====D2-125 Stand-alone Test=====  =====D2-125 Stand-alone Test=====
d2/laser_servo.txt · Last modified: 2021/12/17 01:58 by 127.0.0.1