[Aritomi, Eleonora, Matteo]

 

Last week we had a problem with unstable parametric (de)amplification. The reason is that amplitude of green phase modulation is not enough.

It was 0.5 Vpp last week and now it's 1 Vpp. Parametric (de)amplification looks fine now.

 

Then we measured parametric gain again. The result is shown in an attached figure.

De-amplification is not reasonable, so I used only amplification data for getting threshold power which is 90.21mW.

The parametric gain is smaller than the previous result. The reason could be misalignment of BAB and green inside OPO.