激光与光电子学进展, 2020, 57 (9): 091901, 网络出版: 2020-05-06
基于MgO∶PPLN啁啾结构和频的宽谱黄-橙激光输出 
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Broadband Yellow-Orange Laser Output Based on Chirp Structure MgO∶PPLN Sum-Frequency
非线性光学频率 宽带和频 周期极化晶体 黄-橙全固态激光 nonlinear optical frequency broadband sum-frequency periodically polarized crystal yellow-orange all-solid-state laser
摘要
宽谱黄-橙激光是生物医学领域中重要的荧光光源。基于周期极化掺氧化镁铌酸锂晶体(MgO∶PPLN)的宽带准相位匹配技术,提出了一种基于变迹步进啁啾MgO∶PPLN的建模方案。在啁啾MgO∶PPLN中实现了C波段(1525~1565 nm)和波长为980 nm激光的宽带和频,通过遗传算法对变迹率和啁啾周期范围增量进行了数值优化,在波长为600 nm附近获得了转换效率约为-11 dB、带顶波动为0.047 dB、带宽为6 nm的光谱输出,提供了一种高转换效率、小带顶波动的宽谱黄-橙全固态激光输出方案。
Abstract
The broadband yellow-orange laser is an important fluorescent source in the fields of biomedicine. Based on broadband quasi-phase matching technology of periodically polarized lithium niobate (MgO∶PPLN) crystal, a modeling scheme based on apodization step chirped MgO∶PPLN is proposed. In the chirped MgO∶PPLN, broadband sum frequency of C-band (1525-1565 nm) and 980nm laser is realized. The genetic algorithm is used to optimize the tracking rate and the increment of chirp period range. The spectral output with conversion efficiency of -11 dB, band top fluctuation of 0.047 dB and band width of 6 nm is obtained near the wavelength of 600 nm. This work provides a broadband yellow-orange all-solid-state laser output design with high conversion efficiency and low band top ripple.
郭磊, 陈怀熹, 张新彬, 郭玮, D.K.Choge, 李广伟, 冯新凯, 梁万国. 基于MgO∶PPLN啁啾结构和频的宽谱黄-橙激光输出[J]. 激光与光电子学进展, 2020, 57(9): 091901. Lei Guo, Huaixi Chen, Xinbin Zhang, Wei Guo, Choge D.K., Guangwei Li, Xinkai Feng, Wanguo Liang. Broadband Yellow-Orange Laser Output Based on Chirp Structure MgO∶PPLN Sum-Frequency[J]. Laser & Optoelectronics Progress, 2020, 57(9): 091901.
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