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Proceedings Paper

Effects of liquid crystals on diffractive coupling in a diode laser external cavity
Author(s): J. Michael Finlan; Scott M. Hamilton; James R. Leger
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Paper Abstract

A seven-element gain-guided AlGaAs diode laser array is used to establish an external cavity which relies on weak diffractive coupling for its operation. Collimation of the lasers is achieved using a binary-optics microlens array. A nematic liquid crystal phase modulator is placed in the image plane of the lenslet array to provide individual phase control of each laser stripe. It is shown that the liquid crystal phase modulator is capable of establishing partial coherence by independent adjustment of the laser optical path lengths.

Paper Details

Date Published: 1 May 1990
PDF: 8 pages
Proc. SPIE 1219, Laser Diode Technology and Applications II, (1 May 1990); doi: 10.1117/12.18275
Show Author Affiliations
J. Michael Finlan, GE Astro-Space Div. (United States)
Scott M. Hamilton, GE Astro-Space Div. (United States)
James R. Leger, Lincoln Lab./MIT (United States)

Published in SPIE Proceedings Vol. 1219:
Laser Diode Technology and Applications II
Dan Botez; Luis Figueroa, Editor(s)

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