The Transactions of the Korean Institute of Electrical Engineers (대한전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Analysis of Fourth Harmonic Conversion of High Intensity Nd Laser Beam in KDP Crystal

KDP결정을 이용한 고강도 Nd 레이저광의 제4 고조파변환 해석

  • 장용무 (한양대 공대 전기공학과) ;
  • 김병태 (청주대 이공대 물리광학과) ;
  • 강형부 (한양대 공대 전기공학과)
  • Published : 1992.05.01

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Abstract

The fourth harmonic conversion(FHC) efficiency of high-power Nd laser pulse with wavelength of 1.054x10S0-6Tm using two KDP crystals(doubler adn quadrupler) was simulated numerically. Simulation results show that for the perfect phase-matching condition the FHC efficiency were 60-70% for several hundreds MW/cmS02T class and over 70% for GW/cmS02T class laser pulses. And the overall characteristics of FHC were discussed in terms of effects of input intensity, crystal length, and mismatch angle Δ$\theta$. Optimum method to FHC was type-II doubler & type-I quadrupler KDP crystal because type-II KDP doubler crystal has wide tolerance of acceptance matching-angle.

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