Aberration sensitivity of unstable resonator with semitransparent output coupler

Pavel Anatolievich Mikheyev; Alexander Anatolievich Shepelenko; A. P. Zaikin

doi:10.1117/12.171672

1 April 1994 Aberration sensitivity of unstable resonator with semitransparent output coupler

Pavel Anatolievich Mikheyev, Alexander Anatolievich Shepelenko, A. P. Zaikin

Proceedings Volume 2117, Modeling and Simulation of Laser Systems III; (1994) https://doi.org/10.1117/12.171672
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

An unstable resonator with a semitransparent output coupler is feasible for lasers with moderate gain and a large cross section of active medium. The resonator fundamental mode can be obtained up to Fresnel numbers of 10 and more. Output beam quality does not differ much from the Gaussian beam, but at the same time intensity distribution is rather flat and mode-medium coupling is better. This approach does not require the mirrors with tapered reflectivity profile. In practice the design of this type of resonator often requires the developer to place a spherical mirror inside to fold the optical path and that inevitably causes astigmatism. We describe the results of the investigation of resonator sensitivity to intracavity astigmatisms. The requirements for the resonator setup to obtain nearly unperturbed fundamental mode operation and a convenient resonator design to meet these requirements are discussed.

Citation Download Citation

Pavel Anatolievich Mikheyev, Alexander Anatolievich Shepelenko, and A. P. Zaikin "Aberration sensitivity of unstable resonator with semitransparent output coupler", Proc. SPIE 2117, Modeling and Simulation of Laser Systems III, (1 April 1994); https://doi.org/10.1117/12.171672

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