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Optics Letters

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  • Vol. 28, Iss. 4 — Feb. 15, 2003
  • pp: 242–244

Improvement of the spatial beam quality of laser sources with an intracavity Bragg grating

Sylvie Yiou, Franois Balembois, Patrick Georges, and Jean-Pierre Huignard  »View Author Affiliations


Optics Letters, Vol. 28, Issue 4, pp. 242-244 (2003)
http://dx.doi.org/10.1364/OL.28.000242


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Abstract

We demonstrate a novel method for improvement of spatial beam quality by use of the angular selectivity of a thick phase grating inserted into various laser cavities. Preliminary experiments with an intentionally degraded beam from a Nd:YVO 4 laser have enhanced beam propagation factor M2 by a factor of 4.5. Operation with a broad-area laser diode in an external cavity with a thick grating was achieved. We obtained 100 mW of cw power in a beam with an M2 of 1.3. Moreover, a reduction of the output spectrum by as much as a factor of 3.8 was obtained.

© 2003 Optical Society of America

OCIS Codes
(050.7330) Diffraction and gratings : Volume gratings
(140.5960) Lasers and laser optics : Semiconductor lasers

Citation
Sylvie Yiou, Franois Balembois, Patrick Georges, and Jean-Pierre Huignard, "Improvement of the spatial beam quality of laser sources with an intracavity Bragg grating," Opt. Lett. 28, 242-244 (2003)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-28-4-242


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