Laser mode changing with deformation of resonator mirrors under irradiation

du shao-jun; lu qi-sheng; shu bo-hong; wang mo-ge

Volume 19 Issue 01

Jan. 2007

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Article Navigation > High Power Laser and Particle Beams > 2007 > 19(01): 0-

cheng liang, zhang yongmin, yao weibo, et al. Loss parameters of spiral generator[J]. High Power Laser and Particle Beams, 2011, 23.

Citation:

du shao-jun, lu qi-sheng, shu bo-hong, et al. Laser mode changing with deformation of resonator mirrors under irradiation[J]. High Power Laser and Particle Beams, 2007, 19.

cheng liang, zhang yongmin, yao weibo, et al. Loss parameters of spiral generator[J]. High Power Laser and Particle Beams, 2011, 23.

Citation:

du shao-jun, lu qi-sheng, shu bo-hong, et al. Laser mode changing with deformation of resonator mirrors under irradiation[J]. High Power Laser and Particle Beams, 2007, 19.

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Laser mode changing with deformation of resonator mirrors under irradiation

1.
College of Optoelectric Science and Engineering,National University of Denfense Technology,Changsha 410073,China

Publish Date: 2007-01-15

Abstract

Abstract

Influences on the mode of positive-branch confocal unstable resonator are analyzed, which is caused by deformation of resonator mirrors. The coupling relations between deformation of resonator mirrors and laser modes are solved by using methods of time discrete, fast Fourier transform(FFT) and finite element analysis(FEA). With the increasing working time of laser discreteness, the results of calculation show that temperature increment and deformation of resonator mirrors become serious, which causes decline of laser modes and beam quality. The uniformity of phase and dispersing appearance are discussed. The correlative experiments show that laser output beam quality becomes worse when the laser works longer.
- unstable resonator,
- laser mode,
- deformation of resonator mirror,
- time discreteness,
- fast fourier transform(fft),
- finite element analysis(fea)

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