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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Editor: Zhizhan Xu
  • Vol. 10, Iss. 6 — Jun. 10, 2012
  • pp: 060501–

Analysis on FM-to-AM conversion induced by spatial filter in a high-power laser system

Hujie Zhang, Shenlei Zhou, Youen Jiang, Jinghui Li, Wei Feng, and Zunqi Lin  »View Author Affiliations


Chinese Optics Letters, Vol. 10, Issue 6, pp. 060501- (2012)


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Abstract

In order to avoid stimulated Brillouin scattering and smooth the final focal spot that reaches the D-T capsule, spectral broadening is essential. However, the modulation of spectral structure might result in frequency-to-amplitude modulation (FM-to-AM) conversion. The spatial filter pinhole is used to cut off the high-frequency transmission laser, and to ensure the desired pass. Improper parameter of pinhole would lead a negative impact. Using the spatial filter pinhole, we analyze the characteristic of intensity modulation using several pinholes of improper parameters. We then compare these results with the intensity modulation obtained from an experiment. Experimental diagnosis and design of an appropriate pinhole parameter would be highly beneficial to the field of high-power lasers.

© 2012 Chinese Optics Letters

OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(220.4840) Optical design and fabrication : Testing
(300.1030) Spectroscopy : Absorption
(070.2615) Fourier optics and signal processing : Frequency filtering

ToC Category:
Diffraction and Gratings

Citation
Hujie Zhang, Shenlei Zhou, Youen Jiang, Jinghui Li, Wei Feng, and Zunqi Lin, "Analysis on FM-to-AM conversion induced by spatial filter in a high-power laser system," Chin. Opt. Lett. 10, 060501- (2012)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-10-6-060501


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