A high efficient ring-cavity optical parametric oscillator at 1.57μm eye-safe range using three non-critically phasematched KTP crystals is researched and experimentally demonstrated. The primary advantage of the ring-cavity OPO is that the resonator mirrors are at 30 degrees to the pump beam, so they do not provide any feedback to the pump laser. The signal energy of 75mJ with the pulse width of 6.6ns is obtained under the input pump pulse of 200mJ. This result provided a clear demonstration that high pump-to-signal energy conversion (up to 37.5%) can be achieved from the ringcavity OPO by single-pass pumped method.

Date Published: 28 August 2009
PDF: 5 pages
Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 73822Y (28 August 2009); doi: 10.1117/12.835512

Published in SPIE Proceedings Vol. 7382:
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging
Farzin Amzajerdian; Chun-qing Gao; Tian-yu Xie, Editor(s)