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Clocklaser

Turning on the Laser

Turning off the Laser

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