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groups:mg:experiment:laser:383nmlaser [2018/06/07 11:25] – pgehrkegroups:mg:experiment:laser:383nmlaser [2022/04/01 09:07] (current) – fim
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   * Injection Power: 32 mW   * Injection Power: 32 mW
   * Power behind 30dB Isolator: 1.05 W   * Power behind 30dB Isolator: 1.05 W
 +  * Originally this TA was used: EYP-TPA-0765-01500-3006-CMT03-0000. Is this still true?
  
 **Fiber** **Fiber**
Line 33: Line 34:
   * Waist: 30µm (crystal), 130µm (long arm)   * Waist: 30µm (crystal), 130µm (long arm)
   * Transmission: TS3 = 0.049%, T1 = 1.2 %   * Transmission: TS3 = 0.049%, T1 = 1.2 %
-  * ENL = 6.1*10^(-5)/W+  * Conversion efficiency ENL = 6.1*10^(-5)/W 
 +$$E_{NL} = \kappa L_c k_1 h_m (B,\xi) $$
   * Linear losses: eL = 0.85(0.15) %   * Linear losses: eL = 0.85(0.15) %
   * Finesse: F = 270   * Finesse: F = 270
  
 +{{ :groups:mg:experiment:laser:ueberhoeungsresonator_mg.png?400 |}}
  
 ===== Stabilisation ===== ===== Stabilisation =====
   * PDH-Method   * PDH-Method
   * Error signal at about 20 MHz   * Error signal at about 20 MHz
 +
  
 {{ :groups:mg:experiment:laser:mg_aufbau.png?400 |}} {{ :groups:mg:experiment:laser:mg_aufbau.png?400 |}}
 +
 +===== Stabilisation: Laser 4 - Potassium =====
 +{{ :groups:mg:experiment:laser:image_2022-04-01_110522.png?400|}}
 +Dopplerfree Saturation Spectroscopy on D1 line of Potassium:
 +
 +  * 1st the two beams with similar intensity are generated by the beam sampler and are send trough the glas cell
 +  * one part of the initial beam is going trough the sampler to a double pass aom and then in the other direction trough the glas cell, crossing only one beam. Important: the beam coming from the aom must have a much higher intensity!
 +  * the first two beams, coming from the sampler trough the cell are than monitored by the PD. The signal is substracted
 +  * in or case e use the aom to create the peak on one side of the mainpeak. This is important for the lock-in scheme
 +
 +{{ :groups:mg:experiment:laser:dopplerfreespectrosc.gif?700|}}
 +
 +
 +