d2:laser_controller
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d2:laser_controller [2019/07/19 18:19] – Michael Radunsky | d2:laser_controller [2019/08/29 17:20] – Michael Radunsky | ||
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[[http:// | [[http:// | ||
- | =====Description: | + | ===== Description: |
The laser controller has two temperature controllers capable of sub-mK stability(( Sub-mK stability requires a proper thermal design and proper tuning of the temperature controller to the thermal plant. If you did not purchase a D2-100 Diode Laser with your Laser Controller, please read the section on tuning the temperature controller.)) and a 200 mA or 500 mA precision current source based on the Libbrecht-Hall(( Libbrecht and Hall, A Low-Noise, High-Speed Current Controller, Rev. Sci. Inst. 64, pp. 2133-2135 (1993).)) circuit. | The laser controller has two temperature controllers capable of sub-mK stability(( Sub-mK stability requires a proper thermal design and proper tuning of the temperature controller to the thermal plant. If you did not purchase a D2-100 Diode Laser with your Laser Controller, please read the section on tuning the temperature controller.)) and a 200 mA or 500 mA precision current source based on the Libbrecht-Hall(( Libbrecht and Hall, A Low-Noise, High-Speed Current Controller, Rev. Sci. Inst. 64, pp. 2133-2135 (1993).)) circuit. | ||
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- | =====Purchase Includes: | + | ===== Purchase Includes: ===== |
<WRAP group> | <WRAP group> | ||
<WRAP half column> | <WRAP half column> | ||
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**Setpoint In** | **Setpoint In** | ||
- | SETPOINT IN is an analog input. When the SETPOINT ENABLE is LOW (0 V) the SETPOINT IN voltage value sets the injection current instead of the front panel dial. | + | SETPOINT IN is an analog input. When the SETPOINT ENABLE is LOW (0 V) the SETPOINT IN voltage value sets the injection current instead of the front panel dial. |
This input is rolled off at 14 Hz, which is not much higher frequency than the front panel dial, which rolls off at 8 Hz, with a second pole at 4 Hz. Therefore, noise can enter the circuit at this point and this input should be used with caution. | This input is rolled off at 14 Hz, which is not much higher frequency than the front panel dial, which rolls off at 8 Hz, with a second pole at 4 Hz. Therefore, noise can enter the circuit at this point and this input should be used with caution. | ||
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When disconnected, | When disconnected, | ||
- | The Servo Input on the front panel continues to function when the SETPOINT ENABLE is pulled low. | + | The Servo Input on the front panel continues to function when the SETPOINT ENABLE is pulled low. Only the Coarse and Fine Current Adjustments are disabled. |
=====Turning on the Laser Diode===== | =====Turning on the Laser Diode===== |
d2/laser_controller.txt · Last modified: 2024/03/27 15:33 by Thomas Bersano