论文标题
基于动态饱和吸收过滤效果
Narrow bandwidth Q-switched Erbium-doped fiber laser based on dynamic saturable absorption filtering effect
论文作者
论文摘要
我们提出了一个狭窄的光谱带宽ERBIUM掺杂纤维（EDF）激光Q-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-S-SDIG转换（SDIG）通过改革纤维饱和吸收剂FSA的结构，该结构带有EDF和一块EDF和纤维bragg Grating。 SDIG同时通过理论分析和实验结果确认了可饱和吸收和光谱滤波效应，这是我们所知的最大知识。进一步的研究证实，Q开关排放的光谱宽度取决于SDIG的长度和泵源的输入功率。当SDIG和泵功率的长度分别为20 cm和250 mW时，在这项工作中达到的Q开关脉冲最狭窄的频谱宽度约为29.1 pm，这是FSA Q开关纤维激光器域中最狭窄的带宽脉冲。我们的方法提供了一种简单的方法来获得具有狭窄带宽的Q开关脉冲，这些脉冲在非线性频率转换，多普勒激光镜头和相干束组合中具有有希望的应用。
We proposed a narrow spectral bandwidth Erbium-doped fiber (EDF) laser Q-switched by a homemade saturable dynamic induced grating (SDIG) which is introduced via reforming the structure of a fiber saturable absorbers FSA with a piece of EDF and a fiber Bragg grating. The SDIG integrates both saturable absorption and spectral filtering effect simultaneously, which was confirmed through theoretical analysis and experimental results for the first time, to the best of our knowledge. Further study verified that the spectral width of the Q-switched emissions is decided by the length of the SDIG and the input power of the pump source. The Q-switched pulse with the narrowest spectral width of about 29.1 pm achieved in this work is the narrowest bandwidth pulse in the domain of the FSA Q-switched fiber lasers when the length of SDIG and pump power are 20 cm and 250 mW, respectively. Our method provides a simple way to obtain the Q-switched pulses with narrow bandwidths, which have promising applications for nonlinear frequency conversion, Doppler LIDAR and coherent beam combinations.
