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Proceedings Paper

Spectral beam combining of fiber lasers: tolerances, lens design, and microlens array inclusion
Author(s): Erik J. Bochove
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Paper 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.

Paper Details

Date Published: 6 June 2002
PDF: 8 pages
Proc. SPIE 4629, Laser Resonators and Beam Control V, (6 June 2002); doi: 10.1117/12.469502
Show Author Affiliations
Erik J. Bochove, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 4629:
Laser Resonators and Beam Control V
Alexis V. Kudryashov, Editor(s)

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