Two-Crystal Design and Numerical Simulations for High-Average-Power Second-Harmonic Generation

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（1）
• 页码范围: 103-107
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/1/014208

摘要

The design and techniques of second-harmonic generation (SHG) have been well developed for lasers with low average-power or single-shot long pulse.In the high-average-power regime,however,the thermal loading may result in limited conversion efficiency and unsatisfied beam-quality due to the thermally induced phase mismatch.[1] Because of this detrimental effect,it is difficult to push SHG into the high-average power regime of a kilowatt.In order to alleviate the problem of thermally induced phase mismatch in high-averagepower SHGs,several schemes have been proposed and tested since the 1980 s,such as beam shaping and gascooled multiple-plate designs.[2-4] In another way,researchers are also attempting to seek new solutions based on the choice of nonlinear crystal.[5,6] However,this scheme of temperature-insensitive phasematching (PM) can be realized only at a specific wavelength for a certain crystal.