Optimal design of segmented quasi-phase-matching SHG+DFG wavelength conversion structure based on hybrid genetic algorithm

Tao Liu; Jie Cui

doi:10.1117/12.2068543

18 August 2014 Optimal design of segmented quasi-phase-matching SHG+DFG wavelength conversion structure based on hybrid genetic algorithm

Tao Liu, Jie Cui

Author Affiliations +

Proceedings Volume 9281, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies; 92810S (2014) https://doi.org/10.1117/12.2068543
Event: 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2014), 2014, Harbin, China

Abstract

A hybrid genetic algorithm is proposed to optimal design the wavelength converter which using segmented grating structure and cascaded second-harmonic generation and difference-frequency generation process. Investigation of the influences of the structure parameters on conversion bandwidth and conversion response are carried out. High conversion efficiency, flat response and broad conversion bandwidth can be obtained simultaneously, by adding the segment number of QPM grating and optimizing the poling period of each segment. The utilizing of the hybrid genetic algorithm can not only make one obtain precise optimal results, but also shorten the simulation time significantly, so it is helpful to the practical design of the wavelength converters.

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Tao Liu and Jie Cui "Optimal design of segmented quasi-phase-matching SHG+DFG wavelength conversion structure based on hybrid genetic algorithm", Proc. SPIE 9281, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 92810S (18 August 2014); https://doi.org/10.1117/12.2068543

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KEYWORDS

Second-harmonic generation

Genetic algorithms

Crystals

Computer simulations

Nonlinear dynamics

Optical design

Polarization

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