Clocklaser

Turning on the Laser

We use toptica electronics:

Turning the main-key to on

Push the green button. The green LED will go on!

Switch on the toggle (=Kippschalter) from the laserdiode.

Switch on the toggle from the TA, if he is seeded!

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”

Locking to the resonators

Littmann design

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