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groups:mg:clocklaser [2017/04/27 09:02] – ssauergroups:mg:clocklaser [2018/08/31 13:25] (current) – removed ssauer
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-===== Clocklaser ===== 
  
-==== Turning on the Laser ==== 
-We use toptica electronics: 
-  - Turning the main-key to on. The LED´s from the temperature control will go on! 
-  - Push the green button. The green LED from the button will go on! 
-  - Switch on the toggle (=Kippschalter) from the laserdiode. The green LED from the laserdiode module will go on! 
-  - Switch on the toggle from the TA, if he is seeded! The green LED from the TA module will go on! 
-If the switches are on, then not steps 3. & 4.:-) 
- 
-==== Turning off the Laser ==== 
-Both toggles to switch to off(Laserdiode/TA) is not required!  
-  - Push the red button. The green LED will go out! 
-  - Turning the main-key to "mains" 
- 
-=== Turning off the Laserdiode === 
-  - Switch off the toggle from the TA. The green LED from the TA module will go out! 
-  - Switch off the toggle from the laserdiode. The green LED from the laserdiode module will go out! 
- 
-=== Turning off or on only the TA === 
-  - Switch off or on the toggle from the TA. The green LED from the TA module will go out or on! 
- 
-==== Locking to the resonators ==== 
- 
-==== Littmann design ==== 
-{{ :groups:mg:img_0260.jpg?300|}} 
-{{ :groups:mg:img_0259.jpg?300|}}\\ 
- 
-**Typical efficiencies at 916 nm:** 
-  * Isolators: 80 % 
-  * AOMs: 50-60 % 
-  * Fiber coupling: 50 %  
- 
-**Typical values for the laser:** 
-  * Frequency: 327.5293 THz (doubled upstairs directly behind SHG: 655.058 566 THz) 
-  * Power after ECDL: ~12 mW (@ ~90 mA) 
-  * Power after TA: ~200 mW (@ ~1000 mA) 
-  * TA current should be <1.2A otherwise the fiber stabilization will soar (=aufschwingen) 
- 
-**Typical values in front fibers:** 
-  * Power before fiber for wavemeter/comb/mode analysis cavity:~12 mW 
-  * Power before AtomLabFiber: ~30 mW -> 15 mW upstairs before TA 
-  * Power to R2: ~2.5 mW 
- 
-**Typical values for the resonators:** 
-  * In front of telescope: 2.2 mW 
-  * In front of AOM: 1.5 mW 
-  * In front of fiber: 450 µW 
-  * 100 µW between Isolator and BS 
-  * 50 µW in front of Resonator 
- 
-**Typical values for locking signals:** 
-  * PDH error signal locked ~500 mV PP / unlocked ~200 mV PP 
-  * Intensity Error signal ~2 mV PP / DC:  
-  * Fiber Stabilization Locked ~200 mV PP / Unlocked ~2 Volt PP 
- 
- 
-**Manuals and Datasheets**