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groups:mg:experiment:laser:clocklaser [2015/09/01 21:48] – klaus | groups:mg:experiment:laser:clocklaser [2017/05/29 17:55] (current) – [SHG] njha | ||
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The laser frequency can be controlled by a piezo and jumps cyclicly with linear length change. An intra-ECDL-etalon is used to course-adjust the frequency and jump-ranges. | The laser frequency can be controlled by a piezo and jumps cyclicly with linear length change. An intra-ECDL-etalon is used to course-adjust the frequency and jump-ranges. | ||
**Do not** use the laser-diode current to change the frequency. | **Do not** use the laser-diode current to change the frequency. | ||
+ | |||
+ | === Typical power values === | ||
+ | * Laser diode: 7-10 mW @ 80 mA | ||
+ | * TA: 100 mW @ 800 mA | ||
+ | * Power infront of fiber going upstairs: 30 mW | ||
+ | * Power for the double-pass AOMs: ~ 10 mW | ||
+ | * Power infront of the clock-resonators: | ||
+ | <note important> | ||
===== Tapered amplifier (upstairs) ===== | ===== Tapered amplifier (upstairs) ===== | ||
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* Seedpower: min 10 mW | * Seedpower: min 10 mW | ||
- | * Outputpower: | + | * Outputpower: |
* Max outpupower related to the datasheet: 1.5 W @ 3 A | * Max outpupower related to the datasheet: 1.5 W @ 3 A | ||
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* Outputower: ~ 120 mW | * Outputower: ~ 120 mW | ||
- | * Power transfered through the fiber: 20 mW | + | * Power transfered through the fiber: |
* Power behind the lattice mirror: ~7 - 8 mW | * Power behind the lattice mirror: ~7 - 8 mW | ||
- | SHG Photodiode is saturated for full TA power. | + | SHG Photodiode |
- | * SHG beamprofil has some additional //spots// on one side | + | * SHG beamprofil has some additional //spots// on both sides (before realigning the spots has been mostly on on side) |
+ | * The SHG beam is at the edge of the lens direct behind the SHG outcoupling mirror. In case of low power check if the beam do not fully pass the lens. | ||
* SHG beam direction of the blue beam changes with the TA power -> Adjust at maximal power. | * SHG beam direction of the blue beam changes with the TA power -> Adjust at maximal power. | ||
+ | * If the Toptica PID cannot lock the SHG signal, try removing and re-connecting the " | ||