Generation of super-Gaussian modes in Nd:YAG lasers with graded-phase mirrors

Michael Gerber; Thomas Graf

doi:10.1117/12.537456

14 November 2003 Generation of super-Gaussian modes in Nd:YAG lasers with graded-phase mirrors

Michael Gerber, Thomas Graf

Proceedings Volume 5147, ALT'02 International Conference on Advanced Laser Technologies; (2003) https://doi.org/10.1117/12.537456
Event: ALT'02 International Conference on Advanced laser Technologies, 2002, Adelboden, Switzerland

Abstract

To change the intensity distribution of the fundamental mode in a Nd:YAG laser resonator to a top-hat profile we developed and used a dielectric graded-phase mirror. A super-Gaussian mode of the sixth order was generated by means of a graded-phase mirror with a simple ring-shaped phase step on a spherical reflector. The depth of the ring was 90 nm. The graded-phase mirror was manufactured with an ordinary vapor deposition technique. An annular mask with a thickness of 10 μm was used to avoid the deposition of the LaF₃ vapor at the position of the ring. Laser experiments with continuous-wave and repetitively pulsed dioed-laser pumping were performed and compared. The results are in excellent agreement with the theory.

Citation Download Citation

Michael Gerber and Thomas Graf "Generation of super-Gaussian modes in Nd:YAG lasers with graded-phase mirrors", Proc. SPIE 5147, ALT'02 International Conference on Advanced Laser Technologies, (14 November 2003); https://doi.org/10.1117/12.537456

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