Hybrid intra-extra cavity OPO using monolithic crystal for improvement in OPO efficiency

S. K. Verma; D. R. Korhalkar; A. Nautiyal

doi:10.1117/12.698531

14 February 2007 Hybrid intra-extra cavity OPO using monolithic crystal for improvement in OPO efficiency

S. K. Verma, D. R. Korhalkar, A. Nautiyal

Proceedings Volume 6455, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VI; 645515 (2007) https://doi.org/10.1117/12.698531
Event: Lasers and Applications in Science and Engineering, 2007, San Jose, California, United States

Abstract

An intra-extra (hybrid) cavity Optical Parametric Oscillator (OPO) using monolithic KTP crystal has been built for converting 1064nm Nd:YAG laser radiation into 1572nm eye safe wavelength with high total conversion efficiency. Here a monolithic X-cut KTP crystal, having HR coating for 1064nm on the output face, was used external to the Nd:YAG laser. The Nd:YAG laser is Q-switched by a rotating prism. Because of the prism in rotation, it comes in alignment with the PR (partial reflective) mirror of Nd:YAG laser and with the output face of the KTP crystal. This situation gives rise to the intra-extra cavity OPO. In this configuration OPO gives sufficient eye safe output even when Nd:YAG is operated below its lasing threshold. Also the power of the OPO eye safe output is reasonably insensitive to the alignment variations.

Citation Download Citation

S. K. Verma, D. R. Korhalkar, and A. Nautiyal "Hybrid intra-extra cavity OPO using monolithic crystal for improvement in OPO efficiency", Proc. SPIE 6455, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VI, 645515 (14 February 2007); https://doi.org/10.1117/12.698531

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