Spectral beam combining of fiber lasers: tolerances, lens design, and microlens array inclusion

Erik J. Bochove

doi:10.1117/12.469502

6 June 2002 Spectral beam combining of fiber lasers: tolerances, lens design, and microlens array inclusion

Erik J. Bochove

Proceedings Volume 4629, Laser Resonators and Beam Control V; (2002) https://doi.org/10.1117/12.469502
Event: High-Power Lasers and Applications, 2002, San Jose, California, United States

Abstract

Defocusing, angular, and linear alignment tolerances, and the effects of transform lens aberrations are calculated for spectral beam combining of fiber lasers, first for a cavity in which no microlens array is used in the collimating optics. Two design criteria are derived and used to compare four lenses: a simple bi-spherical lens, a compound quadruplet, a plano-aspheric lens, and a plano-parabolic lens. The results point to superior performance of simple aspheric lenses over compound lenses with spherical surfaces. A kind of equivalence of efficiency and beam quality is demonstrated. Partial results on the inclusion of a microlens array for improved beam collimation predicts marked increase of the maximum array size and overall efficiency.

Citation Download Citation

Erik J. Bochove "Spectral beam combining of fiber lasers: tolerances, lens design, and microlens array inclusion", Proc. SPIE 4629, Laser Resonators and Beam Control V, (6 June 2002); https://doi.org/10.1117/12.469502

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