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d2:laser_servo [2019/02/21 17:46] – Michael Radunsky | d2:laser_servo [2019/07/15 22:50] – [Laser Lock Troubleshooting] Michael Radunsky |
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**Auxiliary Servo Output** | **Auxiliary Servo Output** |
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The AUXILIARY SERVO OUTPUT is generated from integrating the SERVO OUTPUT. Its purpose is to supply a correction signal to drive the SERVO OUTPUT to zero. When used with Vescent DBR lasers and the D2-105 Laser Controller, the AUXILIARY SERVO OUTPUT can be connected to the TEMP SERVO IN to adjust the laser diode temperature to keep the feedback laser current constant. Similarly, AUXILIARY SERVO OUTPUT can drive a PZT on an external-cavity laser diode to keep the laser diode current constant. See [[d2:laser_servo#Aux Gain: + / Aux Gain - (2-position switch)|AUXILIARY SERVO: GAIN SIGN]] and [[d2:laser_servo#Auxiliary Servo: Gain (25-turn trimpot)|AUXILIARY SERVO: GAIN]] for information on setting the gain and and gain sign of the AUXILIARY SERVO OUTPUT. | The AUXILIARY SERVO OUTPUT is generated from integrating the SERVO OUTPUT. Its purpose is to supply a correction signal to drive the SERVO OUTPUT to zero. When used with Vescent DBR lasers and the D2-105 Laser Controller, the AUXILIARY SERVO OUTPUT can be connected to the TEMP SERVO IN to adjust the laser diode temperature to keep the feedback laser current constant. Similarly, AUXILIARY SERVO OUTPUT can drive a PZT on an external-cavity laser diode to keep the laser diode current constant. See [[d2:laser_servo#Aux Gain: + / Aux Gain - (2-position switch)|AUXILIARY SERVO: GAIN SIGN]] and [[d2:laser_servo#Auxiliary Servo: Gain (25-turn trimpot)|AUXILIARY SERVO: GAIN]] for information on setting the gain and gain sign of the AUXILIARY SERVO OUTPUT. |
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**Ramp Offset** | **Ramp Offset** |
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<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.jpg?direct&400 |}} |}}</imgcaption></WRAP> | {{ {{ d2:d2-125:factory_settings_red.png?direct&400 |}} |}}</imgcaption></WRAP> |
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=====D2-125 Stand-alone Test===== | =====D2-125 Stand-alone Test===== |