Characterization of beam quality of high-energy laser

Wei Gao; Huiming Huang

doi:10.1117/12.516955

1 August 2003 Characterization of beam quality of high-energy laser

Wei Gao, Huiming Huang

Proceedings Volume 4948, 25th International Congress on High-Speed Photography and Photonics; (2003) https://doi.org/10.1117/12.516955
Event: 25th international Congress on High-Speed photography and Photonics, 2002, Beaune, France

Abstract

The paper is devoted to a study of methods for characterizing and diagnosing the beam quality of high energy laser. It begins with a review of the rationality and usability of the parameters that have been used for characterizing laser beam quality. Considering the specific characteristics of high energy laser, we suggest characterizing the beam quality of high energy laser with diffraction limit multiple β-factor and encircled energy ratio BQ. Then the selection of the referential (or ideal) beam for β-factor is discussed in detail and the far-field diffraction intensity distributions and divergent angles of various referential beams have been calculated and compared. The results show that among all of referential beams with the same diffraction area or external aperture size, the circular solid homogenous beam has the smallest far-field divergent angle, thus choosing such a beam as the ideal beam would be the most reasonable and strongly proposed. Finally, techniques for diagnosing the beam quality of high energy laser are presented.

Citation Download Citation

Wei Gao and Huiming Huang "Characterization of beam quality of high-energy laser", Proc. SPIE 4948, 25th International Congress on High-Speed Photography and Photonics, (1 August 2003); https://doi.org/10.1117/12.516955

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