红外与毫米波学报2023，Vol.42Issue(2)：267-275,9.DOI:10.11972/j.issn.1001-9014.2023.02.018
1.06µm结构参数最优化非保偏锁模光纤激光器
Optimization of structural parameters of a 1.06 μm non-polarization mode-locked fiber laser
摘要
Abstract
A mode-locked fiber laser using Semiconductor Saturable Absorber Mirrors (SESAMs) is one of the popular candidate seed light sources for the construction of picosecond pulse fiber amplifier. In this paper, the in? fluence of the fiber length of a gain fiber, the reflectance of the Fiber Bragg Grating (FBG), the modulation depth, the unsaturated loss, and the saturation flux of SESAMs, the mode field radii of single-mode transmission fibers and a single-mode gain fiber, on the output pulse characteristics, have been theoretically analyzed using the nonlinear Schrodinger equations. The characteristics of the pulse and the spectrum of an outputted laser have also been investigated theoretically. According to the simulation results, we built an ytterbium-doped mode-locking fi? ber laser system based on the non-polarization-maintaining linear cavity and a SESAM. Without any compensa? tion for intra-cavity dispersion and external polarization control, a stable mode-locked pulse laser output has been achieved with the center wavelength of 1. 06 μm, the pulse width of less than 12. 51 ps, the spectral width of 0. 32 nm, the repetition rate of 37 MHz, and the output power of 2 mW, respectively. The spectral edges of laser pulses appear smooth in our experiment, and the spectral distribution is close to the Gaussian shape. Finally, the overall structure of the near-infrared mode-locked fiber laser has been optimized by the systematic simulation. The mode-locked fiber laser introduced in this paper has a compact non-polarization-maintaining fiber structure, simple intra-cavity configuration with fewer components, high-quality output pulse correlation characteristics, which might provide a practical seed light source with the excellent performance for the next-generation picosec? ond pulse fiber lasers.关键词
非保偏光纤/高斯线型光谱/锁模光纤激光器/结构优化Key words
non polarization maintaining fiber/Gaussian linear spectrum/mode-locked fiber laser/structural optimization分类
信息技术与安全科学引用本文复制引用
张家瑞,王蓟,何幸锴,沈琪皓,范琪,周鼎富,王浟..1.06µm结构参数最优化非保偏锁模光纤激光器[J].红外与毫米波学报,2023,42(2):267-275,9.基金项目
This work was supported by the National Key Research and Development Program of China(No.2021YFA0718803),Sichuan Science and Technology Plan,China(No.2022YFG0352). （No.2021YFA0718803）
