激光与光电子学进展, 2015, 52 (12): 121901, 网络出版: 2015-12-08
BBO 晶体用于掺铒光纤锁模激光宽带倍频的研究 下载: 517次
Broadband Frequency Doubling of Er-Fiber Mode-Locked Laser in BBO Crystal
摘要
从Sellmeier 方程出发得到了BBO 晶体在1550 nm 波段具有波长不敏感的性质,因此BBO 晶体可用于掺铒光纤锁模激光器的宽带倍频。采用分布傅里叶方法对倍频耦合波方程进行了数值求解,得到了不同功率密度以及不同脉宽基频光的情况下倍频效率和转换带宽随晶体长度的变化关系,提出了晶体最佳长度的选择标准。与小信号近似的选择方法相比,该方法的适用范围更广,可用于不同功率密度情况下的晶体长度选择。
Abstract
The BBO crystal has insensitivity to the wavelength near 1550 nm where mode-locked Er-fiber lasers operate through the analysis of the Sellmeier equations, which can be used for broadband frequency doubling of femtosecond Er-fiber laser. Split-step Fourier method is used to numerically solve the coupled wave equations of frequency conversion. The conversion efficiency and the output spectral bandwidth with the length of the crystal under different power densities and different durations of the fundamental pulse are obtained. On this basis, citations are made to select the best size of BBO crystal. Compared with the small signal approximation, this method is applicable more widely, which can be used to choose the crystal under different power densities.
杨盛, 黄小军, 吴朝辉, 邱荣, 王俊波, 李超. BBO 晶体用于掺铒光纤锁模激光宽带倍频的研究[J]. 激光与光电子学进展, 2015, 52(12): 121901. Yang Sheng, Huang Xiaojun, Wu Zhaohui, Qiu Rong, Wang Junbo, Li Chao. Broadband Frequency Doubling of Er-Fiber Mode-Locked Laser in BBO Crystal[J]. Laser & Optoelectronics Progress, 2015, 52(12): 121901.