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d2:laser_controller

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d2:laser_controller [2021/02/26 22:52] – Michael Radunskyd2:laser_controller [2021/08/26 14:26] – external edit 127.0.0.1
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   - Measure the resistance across GND5 and probe point GAIN2. Set this resistance to between 1.2 kΩ and 1.4 kΩ by adjusting trimpot PROPGAIN2.   - Measure the resistance across GND5 and probe point GAIN2. Set this resistance to between 1.2 kΩ and 1.4 kΩ by adjusting trimpot PROPGAIN2.
  
-<WRAP center round box 570px><imgcaption factory_set_post6987|Factory settings of T2 (left) and T1 (right) poles for units with S/N 2675 or higher (PCBs with S/N 6987 and higher)>[{{ :d2:d2-105:temp_loop_post_sn_6987_w_text.png?nolink&550 | filler text }}]</imgcaption></WRAP>+<WRAP center round box 570px><imgcaption factory_set_post6987|Factory settings of T2 (left) and T1 (right) poles for units with S/N 2675 or higher (PCBs with S/N 6987 and higher)>[{{ :d2:d2-105:Modern_Corners.jpg?nolink&550 | filler text }}]</imgcaption></WRAP>
  
 <WRAP center round box 60%><tabcaption factory_set2_post6987|Factory settings of T2 Proportional poles (first DIP switch in figure) and T2 Differential poles (second DIP switch in figure) for units with S/N 2675 or higher (PCBs with S/N 6987 and higher)> <WRAP center round box 60%><tabcaption factory_set2_post6987|Factory settings of T2 Proportional poles (first DIP switch in figure) and T2 Differential poles (second DIP switch in figure) for units with S/N 2675 or higher (PCBs with S/N 6987 and higher)>
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 //NOTE: Depending on the thermal design, nested temperature loops can fight each other, causing oscillations and instability. If you observe this, you will need to reduce the gain and/or increase the time-constants on the slower stage. // //NOTE: Depending on the thermal design, nested temperature loops can fight each other, causing oscillations and instability. If you observe this, you will need to reduce the gain and/or increase the time-constants on the slower stage. //
  
-===Tuning Temperature Loop for Photodigm Mercury Lasers===+===Tuning Temperature Loop for Photodigm Mercury Lasers if you have an older D2-105=== 
 +If you have a D2-105 with S/N 2674 or lower (PCBs with S/N 6986 and lower), then you may still be able to tune the parameters of the loop to stably control the temperature of the TOSA by following the protocol below:
  
 If you are using the D2-105 laser controller to drive a Photodigm Mercury laser in a TOSA package, the following may be helpful as a starting point for setting the thermal control loop parameters.((Courtesy of [[http://www.photodigm.com|Photodigm]]))  Refer to <imgref side_adjustb>. If you are using the D2-105 laser controller to drive a Photodigm Mercury laser in a TOSA package, the following may be helpful as a starting point for setting the thermal control loop parameters.((Courtesy of [[http://www.photodigm.com|Photodigm]]))  Refer to <imgref side_adjustb>.
d2/laser_controller.txt · Last modified: 2024/03/27 15:33 by Thomas Bersano