Numerical analysis of broadband third-harmonic generation using CsLiB6O10 crystals
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1.
College of Photoelectric Science Engineering, National University of Defense Technology, Changsha 410073, China;
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2.
Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
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Corresponding author:
TAN Ji-chun, tan573290@163.com
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Received Date:
2006-03-31
Accepted Date:
2006-04-29
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Abstract
To study the efficient broadband third-harmonic generation(THG) technology,the process in CsLiB6O10(CLBO) crystals was studied through numerical simulation based on split-step Fourier transformation and the fourth-order Runge-Kutta method.The dependence of conversion efficiency on input intensity and bandwidth of 1ω waves was analyzed in type-Ⅰ/type-Ⅱ and type-Ⅰ/type-Ⅱ/type-Ⅰ quadrature schemes respectively.As a comparison,broadband THG in KDP crystals was also investigated.Conversion efficiency up to 60% with a bandwidth of 650GHz was achieved in the type-Ⅰ/type-Ⅱ/type-Ⅰ quadrature scheme while the temporal profile of 1ω was assumed to be super-Gaussian(40,exponent) with an intensity of 3GW/cm2.An increase of 250GHz was accomplished in CLBO crystals compared with that in KDP crystals.The obtained results show that broadband THG conversion efficiency can be improved availably in the type-Ⅰ/type-Ⅱ/type-Ⅰ quadrature scheme with CLBO crystals.
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