Novel method of solid state laser thermal lens intracavity correction by a modal liquid crystal adaptive lens with optical control

Igor R. Guralnik; I. V. Sozinova

doi:10.1117/12.417714

2 March 2001 Novel method of solid state laser thermal lens intracavity correction by a modal liquid crystal adaptive lens with optical control

Igor R. Guralnik, I. V. Sozinova

Author Affiliations +

Proceedings Volume 4353, Laser Optics 2000: Control of Laser Beam Characteristics and Nonlinear Methods for Wavefront Control; (2001) https://doi.org/10.1117/12.417714
Event: Laser Optics 2000, 2000, St. Petersburg, Russian Federation

Abstract

We suggest a new way to compensate for the thermal lensing effect in the mid-power solid-state lasers. This can be done by the use of a liquid-crystal adaptive lens with optically controlled focal length (optically addressed lens -- OAL) which is a modification of the modal liquid crystal lens (MLCL) which has recently been suggested and successfully implemented. The phase shift introduced by OAL into the transmitted light wave is theoretically shown to correspond to a converging lens whose focal length depends on the light intensity distribution across the aperture. OAL implements an intra-cavity optical feedback, which can effectively compensate for the laser beam defocus resulted from the emerging thermal lensing. For various types of resonators the beam stability is improved by the use of OAL. Correction becomes more effective if the OAL is positioned close to the laser rod.

Citation Download Citation

Igor R. Guralnik and I. V. Sozinova "Novel method of solid state laser thermal lens intracavity correction by a modal liquid crystal adaptive lens with optical control", Proc. SPIE 4353, Laser Optics 2000: Control of Laser Beam Characteristics and Nonlinear Methods for Wavefront Control, (2 March 2001); https://doi.org/10.1117/12.417714

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KEYWORDS

Resonators

Liquid crystals

Adaptive optics

Mirrors

Solid state lasers

Thermography

Refractive index

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