Differences
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| Both sides previous revisionPrevious revisionNext revision | Previous revisionNext revisionBoth sides next revision |
| d2:laser_servo [2019/02/21 15:55] – [Right Side Panel] Michael Radunsky | d2:laser_servo [2019/07/12 23:10] – 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** |
| ===Auxiliary Servo: Gain (25-turn trimpot)=== | ===Auxiliary Servo: Gain (25-turn trimpot)=== |
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| This trimpot sets the gain for the AUXILIARY SERVO OUTPUT. The Aux Servo is a pure integrator and the gain ranges from 500 μs to 5 s. | This trimpot sets the gain for the AUXILIARY SERVO OUTPUT. The Aux Servo is a pure integrator and the gain ranges from 500 μs to 5 s. Full ccw sets gain to minimum (5 s), full cw sets gain to maximum (500 µs). |
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| <WRAP center round box 420px><imgcaption d2_125_side_panel_photo|Certain rarely used controls are only accessible by removing the right-side panel, as shown in the figure above.> | <WRAP center round box 420px><imgcaption d2_125_side_panel_photo|Certain rarely used controls are only accessible by removing the right-side panel, as shown in the figure above.> |
