Clocklaser

Laserdiode

Datasheet [Serial Number: BA-02465]

Datasheet [Serial Number: BA-02464]

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

Put a Paper infront R1 - Check Laserdiodepower after Laserhousing - TA Lock: If the incoupling is good → 1A - after TA: ~200mW - Nessasray lock power: 200mW - Intensity Lock - after Isolator ~120müW - otherwise improve the optical way to the Isolator for more power - mit Output Offset des Intenstitäts-PID auf 100müW herunterdrehen - Check Power after Isolator of R1: !

Only aktivate PDH/TA, if the power is 70-100müW after the Isolator of R1

Tune the Piezo to TEM00

Lock RAM

Lock Fiberstabilization

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) [2016]

~<fc #ff0000>XX</fc> mW (@ ~96 mA) [2016]

Power after TA:

~200 mW (@ ~1000 mA) [2016]

~<fc #ff0000>XX</fc> mW (@ ~1165 mA) [2018]

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