Coherence and modal structure of optical cavity under conditions of thermic instability in a He-Ne gas laser

K. Contreras; M. Asmad; Guillermo Baldwin-Olguin

doi:10.1117/12.437061

14 August 2001 Coherence and modal structure of optical cavity under conditions of thermic instability in a He-Ne gas laser

K. Contreras, M. Asmad, Guillermo Baldwin-Olguin

Author Affiliations +

Proceedings Volume 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications; (2001) https://doi.org/10.1117/12.437061
Event: IV Iberoamerican Meeting of Optics and the VII Latin American Meeting of Optics, Lasers and Their Applications, 2001, Tandil, Argentina

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.

Citation Download Citation

K. Contreras, M. Asmad, and Guillermo Baldwin-Olguin "Coherence and modal structure of optical cavity under conditions of thermic instability in a He-Ne gas laser", Proc. SPIE 4419, 4th Iberoamerican Meeting on Optics and 7th Latin American Meeting on Optics, Lasers, and Their Applications, (14 August 2001); https://doi.org/10.1117/12.437061

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