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Proceedings Paper

Coherence and modal structure of optical cavity under conditions of thermic instability in a He-Ne gas laser
Author(s): K. Contreras; M. Asmad; Guillermo Baldwin-Olguin
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Paper Abstract

We performed a study of temporal coherence of a commercial He-Ne laser in conditions of thermic instability through calculations based on interference pattern digital images helping by direct measurements of its output power and by temperature and polarization monitoring. This study is based on the variation of the complex degree of coherence with the optical path difference between two laser beams, obtained with the help of an experimental setup based on a Michelson interferometer with collimated light. We show the perturbative effect of the thermic instability on the modal composition and coherence of radiation. We had characterized the laser determining its modal structure and coherence length.

Paper Details

Date Published: 14 August 2001
PDF: 4 pages
Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); doi: 10.1117/12.437061
Show Author Affiliations
K. Contreras, Pontificia Univ. Catolica del Peru (Peru)
M. Asmad, Pontificia Univ. Catolica del Peru (Peru)
Guillermo Baldwin-Olguin, Pontificia Univ. Catolica del Peru (Peru)


Published in SPIE Proceedings Vol. 4419:
4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications

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