22 August 2011 Efficient extracavity OPO single-pass pumped by high beam quality laser with Gaussian unstable resonator
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Abstract
An efficient single-pass pumped extracavity singly-resonant optical parametric oscillator at 1.57μm eye-safe range using a non-critically phase-matched KTP crystal is reported. The pump source is a diode pumped Gaussian unstable resonator Nd:YAG laser with the high beam quality of M2=1.8. The signal energy of 65mJ with the pulse width of 9ns is obtained under the input pump pulse of 196mJ 12ns. This result provided a clear demonstration that very high pump-to-signal energy conversion (up to 33.2%) can be achieved from an extracavity OPO even by single-pass pumped method. The repetition rate range of the all-solid-state OPO device is 30Hz.
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Xu Liu, Changyong Lu, Shuyun Wang, Cheng Yong, "Efficient extracavity OPO single-pass pumped by high beam quality laser with Gaussian unstable resonator", Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81923C (22 August 2011); doi: 10.1117/12.900855; https://doi.org/10.1117/12.900855
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