Abstract

Reduction of the beam divergence of a solid-state slab-geometry laser by using an off-axis unstable–stable resonator is described. The resonator acts as an off-axis negative-branch unstable resonator in the slab-width direction. This resonator configuration yields a small beam divergence of 2.5 mrad in the unstable-resonator direction at an average output power of 120 W. This improvement in beam quality is achieved without appreciable loss of efficiency.

© 1990 Optical Society of America

Off-axis prism resonator for improved beam quality of slab lasers

Qitao Lü and Jochen Eicher
Opt. Lett. 15(23) 1357-1358 (1990)

Compact integrated aberration-compensating module for a 9 kW Nd:YAG slab laser based on an off-axis stable-unstable resonator

Wen-Jun Li, Ya-Ding Guo, Lin Zhang, Chong-Feng Shao, Yang Li, Zhong-Zheng Chen, Xiao-Jun Wang, Yong Bo, Da-Fu Cui, and Qin-Jun Peng
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Quasi-cw-pumped Nd:YAG laser using a negative-branch unstable resonator with a phase-unifying output coupler

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Opt. Lett. 15(2) 110-111 (1990)

Hybrid stable–unstable resonators for diffusion-cooled CO₂ slab lasers

A. Lapucci, A. Labate, F. Rossetti, and S. Mascalchi
Appl. Opt. 35(18) 3185-3192 (1996)

Negative-branch unstable-resonator copper-vapor laser

S. K. Dixit, B. Singh, S. V. Nakhe, J. K. Mittal, and R. Bhatnagar
Opt. Lett. 15(8) 428-430 (1990)