[ Light Conversion ] Extending TOPAS-prime CEP stabilisation measurements to 1 hour

01 Sep, 2014

TOPAS-prime CEP stability measurements for idler wave @ 1900nm have been extended to 1 hour time frame. As idler wave is passively CEP locked due to three-wave parametrical interaction only small phase drift caused by environmental conditions has to be compensated. Compensation is performed by employing an f-2f interferometer and feedback loop controlling temporal delay between seed and pump in second amplification stage of TOPAS-prime.  The standard deviation of long term CEP distribution [Fig. 3] is 120 mrad.

 

Interference pattern of the f-2f spectrum.

fig 1. Interference pattern of the f-2f spectrum.

Fig. 2. Retrieved value and computed standard deviation of the idler CEP over 60 min time range.

Fig. 2. Retrieved value and computed standard deviation of the idler CEP over 60 min time range.

Statistics of CEP retrieved from all spectrums saved over 1 hour.

Fig. 3. Statistics of CEP retrieved from all spectrums saved over 1 hour.