材料科学
光纤激光器
光学
激光器
光电子学
光放大器
色散位移光纤
纤维
波长
光纤传感器
物理
复合材料
作者
Xibao Gao,Zhigang Zhao,Zhenhua Cong,Guanguang Gao,Aiguo Zhang,Honglong Guo,Gang Yao,Zhaojun Liu
出处
期刊:Optics Express
[The Optical Society]
日期:2021-02-28
卷期号:29 (6): 9021-9021
被引量:57
摘要
A stable passively mode-locked Er-doped silica fiber laser with a fundamental repetition rate of up to 5 GHz is demonstrated, which, to the best of our knowledge, is the highest repetition rate for 1.5 μm semiconductor saturable absorber mirror (SESAM) mode-locked Er-doped silica fiber (EDF) lasers. A segment of commercially available EDF with a net gain coefficient of 1 dB/cm is employed as gain medium. The compact Fabry-Pérot (FP) cavity features a fiber mirror, namely multiple-layer dielectric films (DFs) directly coated on end facet of a passive fiber ferrule, enabling a short cavity length of 2 cm configured. The mode-locked oscillator operates at 1561.0 nm with a signal-to-noise ratio (SNR) of 62.1 dB, whose average power is boosted to 27 mW by a single-mode Er-doped fiber amplifier (EDFA) and spectral bandwidth is broadened form 0.69 nm to 1.16 nm with a pulse width of 3.86 ps. The fiber laser shows excellent spectral stability without conspicuous wavelength drifting for 3 hours. Moreover, the basic guidelines of selecting SESAM for high repetition rate passively mode-locked fiber lasers is given.
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