Frequency Comb

Setup

Laser diode current: 9.0
AC: 950, DC: 850 (in Fiber laser software)
Powers:
- after fiber laser: ~ 200 mW @ 1560 nm
- after SHG:
  - ~ 3 W @ 780 nm
  - ~ 95 mW @ 1550 nm
- direct after filter:
  - ~ 32 mW @ 780 nm
- direct infront PCF:
  - ~ 300 mW @ 780 nm without filter
  - ~ 20 mW @ 780 nm with filter
  - ~ 8 mW @ 1550 nm without filter
- after PCF:
  - ~ 8.5 mW @ 780 nm without filter (red light should be visible)
  - ~ 1.8 mW @ 780 nm with filter
  - ~ 250 µW @ 1550 nm without filter
Clock Laser / DUT ~ 5 mW; FWHM « 100 MHz
(right picture is an old measurement and we don´t know where in the comb)
CEO frequency has a linewidth of ~500kHz
- yellow = good lock
- white = bad lock, because the platform and width

Comb has to be optimized almost every day: Most of the times just tuning potis @ SHG & PCF is enough
Low power in general: Maybe pump diodes should be exchanged (15.09.2016: 145 mW Output @ 9.5)
Fiberlaser software does not start: Maybe wrong COM Port: Change @ Windows Device Manager
FiberLaser software starts, but Fiber Comb does not: Maybe NI card not attached properly
You can´t lock CEO and Reprate, than restart the hole lasersysteme [probable all ~1-2 months].

Turn off the frequency comb:
1. Push Amplifier button (LED off)
2. Push Laser button (LED off)
3. turning the upper key (position 0)
4. turning the lower key (position 0)
Turn on:
1. exactly the other way arround

Data under ResLab: D:\Dokumente\Daten\Frequenzkamm\Spektren 161115 1064 nm Port.

measured with optical spectrumanalysizer from AG-Morgner
Resolution: for peak 0.2nm and full range measurement 1.5nm
pdf-files: frequency_comb_spectrum_rf-fiber-output.pdf frequency_comb_spectrum_rf-fiber-output_full_range_.pdf