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13 March 2002 Efficient eye-safe intracavity KTP optical parametric oscillator
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Proceedings Volume 4630, Solid State Lasers XI; (2002)
Event: High-Power Lasers and Applications, 2002, San Jose, California, United States
This paper describes the development and performance of an optical parametric oscillator based on KTP crystal and pumped by a flashlamp-pumped Q-switched Nd:YAG laser at 1.064 micrometers . The effect of an optical resonator configuration on OPO performance has been investigated experimentally. A comparison between plane-parallel, stable and unstable resonators in both energy conversion and output beam divergence was also performed and the results are discussed. In summary, we have demonstrated a compact low threshold source for the near IR in a configuration of an intracavity optical parametric oscillator based on the noncritically phase-matched KTP crystal placed inside the resonator of a multi-transverse-mode Nd:YAG laser. The 1.57 micrometers output energy of 40 mJ was achieved with a stable, short cavity KTP OPO. The overall efficiency of 0.55 percent was obtained from operating approximately 2 times above oscillation threshold. The dependence of output pulse energy on flashlamp input energy was not changed within the range of 5-50 Hz.
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Eugene V. Raevsky, Vladimir L. Pavlovitch, and Vladislav A. Konovalov "Efficient eye-safe intracavity KTP optical parametric oscillator", Proc. SPIE 4630, Solid State Lasers XI, (13 March 2002);

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