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Journal of Applied Physics / Volume 108 / Issue 4 / ARTICLES / Lasers, Optics, and Optoelectronics

J. Appl. Phys. 108, 043109 (2010); http://dx.doi.org/10.1063/1.3462430 (6 pages)

Influence of period and amplitude of microwaviness on KH2PO4 crystal’s laser damage threshold

Mingjun Chen1, Mingquan Li1, Wei Jiang1, and Qiao Xu2

1Center for Precision Engineering, Harbin Institute of Technology, Harbin 150001, China
2Chengdu Fine Optical Engineering Research Center, Chengdu, Sichuan 610041, China

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(Received 4 March 2010; accepted 10 June 2010; published online 31 August 2010)

The laser induced damage threshold (LIDT) has become a technical bottleneck which restricts the application and development of the inertial confinement fusion. Using single point diamond turning method to process KH2PO4 (KDP) crystals, the periodic microwaviness will be left on the machined surface which has a significant impact on the LIDT. In this paper, after acquiring the frequency information of machined surface of KDP crystals with the power spectral density method, we analyze quantitatively the influence of microwaviness on the LIDT of KDP crystal with the Fourier modal theory. Research results indicate that: the surface morphology of KDP crystal is consisted of the subwaviness with different characteristic spatial frequencies; and the reduced amount of the LIDT of KDP crystal leaded by such subwaviness is different; the experimental results of the LIDT are consistent with the theoretical calculations basically; for the machine tool and the processing technology we used, the leading frequency of microwaviness which caused the LIDT decreasing is between (350 μm)−1 and (30 μm)−1, especially between (90 μm)−1 and (180 μm)−1.

© 2010 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. MODEL AND THEORY
  3. SIMULATION AND EXPERIMENT
  4. CONCLUSIONS

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KEYWORDS and PACS

Keywords

laser beam effects, potassium compounds, surface morphology

PACS

  • 61.80.Ba

    Ultraviolet, visible, and infrared radiation effects (including laser radiation)

  • 61.82.Ms

    Insulators

  • 68.35.bt

    Other materials

  • 79.20.Ds

    Laser-beam impact phenomena

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3462430

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    C. W. Carr, M. D. Feit, M. A. Johnson, and A. M. Rubenchik, Appl. Phys. Lett. 89, 131901 (2006)APPLAB000089000013131901000001.


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