Cleanup of Nd:YAG laser beams by two-wave mixing in InP:Fe

Hans Joachim Eichler; Y. Ding; S. Kerekgyarto; Bernhard Smandek

doi:10.1117/12.143862

22 April 1993 Cleanup of Nd:YAG laser beams by two-wave mixing in InP:Fe

Hans Joachim Eichler, Y. Ding, S. Kerekgyarto, Bernhard Smandek

Proceedings Volume 1834, Laser Energy Distribution Profiles: Measurement and Applications; (1993) https://doi.org/10.1117/12.143862
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

A two wave mixing experiment using a Nd:YAG laser, operating at 1064 nm, and a photorefractive InP:Fe crystal resulted in a gain coefficient (Gamma) of 17 cm^-1 and a signal gain (gamma) of 15. In the case of a (pi) /2 spatial phase shift between the light interference fringes and the refractive index grating, phase cross talk is eliminated. Amplitude cross talk can be eliminated using volume hologram averaging of the beams. With this scheme a weak Gaussian beam is amplified by a pump beam containing strong phase and amplitude aberrations. Energy efficiencies of 27% were obtained under preservation of the nearly diffraction limited beam shape.

Citation Download Citation

Hans Joachim Eichler, Y. Ding, S. Kerekgyarto, and Bernhard Smandek "Cleanup of Nd:YAG laser beams by two-wave mixing in InP:Fe", Proc. SPIE 1834, Laser Energy Distribution Profiles: Measurement and Applications, (22 April 1993); https://doi.org/10.1117/12.143862

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