Optical parametric oscillator with periodically poled KTiOPO pumped by 100Hz Nd:YAG green laser

Oba, Masaki; Kato, Masaaki; Maruyama, Yoichiro

Japanese Journal of Applied Physics, Part 2, 41(8A), p.L881 - L883, 2002/08

https://doi.org/10.1143/JJAP.41.L881

Optical parametric oscillator using a periodically poled KTP as a gain medium pumped by a pulsed Nd:YAG green laser of which maximum pulse repetition frequency is 100 Hz is demonstrated. Output energy of 5.8 mJ at the pulse repetition frequency of 100 Hz with the conversion efficiency of about 40% is obtained by double-pass pumping scheme. Threshold pumping energy is 1.6 mJ of which peak power is as low as 18 MW/cm. At the pulse repetition frequency between 10 Hz and 100 Hz, the conversion efficiency is almost constant and undesirable thermal effects are not observed.