I measured again the mode profile of the beam going through the PPKTP crystal by using the beam scan.
The aimed beam waist is 50 um (as described in entry 2735),
and the measured profile had pretty good waist of wx=51.36 +/- 0.0999 um and wy=49.5 +/- 0.146 um 
The next things I have to do are - (1). re-optimization of the temperature of the crystal (2). measurement of the conversion efficiency
The attached figure is the result of the measurement. |