激光线宽
材料科学
光纤布拉格光栅
光学
光纤激光器
相对强度噪声
纵向模式
激光器
飞秒
光电子学
半导体激光器理论
波长
物理
半导体
作者
Ruidong Lv,Tao Chen,Jin Huang,Zenghui Sun,Yuxing Hou,Jinhai Si,Yuan Zhou,Yong Du,Xun Hou
出处
期刊:Applied Optics
[The Optical Society]
日期:2024-02-08
卷期号:63 (8): 2004-2004
摘要
We demonstrate a single longitudinal mode distributed Bragg reflection (DBR) fiber laser by directly fabricating fiber Bragg gratings (FBGs) on an ytterbium-doped fiber (YDF) using a femtosecond laser. A simple optical self-injection feedback method was used to effectively compress the linewidth and reduce relative intensity noise (RIN) of a single longitudinal mode DBR fiber laser. Further, we investigated the effect of self-injection feedback cavity length and reflectivity on linewidth compression and determined that the linewidth tends to decrease with the increase of the external cavity photon lifetime. By a self-injection feedback, the laser linewidth was compressed from 31.8 kHz to 1.4 kHz. Meanwhile, the relaxation oscillation peak from −103.2dB/Hz at 1.51 MHz was suppressed to −122.3dB/Hz at 0.16 MHz. This low-noise narrow linewidth single longitudinal mode fiber laser is expected to be a promising candidate for applications such as active detection of neutral atmosphere and distributed fiber sensing.
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