光学
相对强度噪声
消光比
放大器
激光线宽
物理
光放大器
材料科学
光纤激光器
激光器
光电子学
半导体激光器理论
波长
CMOS芯片
作者
Xianchao Guan,Changsheng Yang,Wei Lin,Qilai Zhao,Tianyi Tan,Qing Gu,Kaijun Zhou,Xiaoming Wei,Zhongmin Yang,Qilai Zhao
出处
期刊:Optics Letters
[The Optical Society]
日期:2020-09-28
卷期号:45 (19): 5484-5484
被引量:10
摘要
In this Letter, a bidirectional amplifier configuration suppressing the relative intensity noise in a 1950-nm linearly polarized single-frequency fiber laser (SFFL) is proposed. The scheme to amplify the signal in a nonlinear saturated amplification regime with low gain distribution for suppressing the RIN is theoretically analyzed. By optimizing the input power level and reflectivity of the bidirectional power-amplifier, the RIN is decreased maximally by >24dB within the frequency range of 200 kHz. A stable output power of over 5.16 W with a polarization extinction ratio of 21.2 dB is obtained. Additionally, the amplified signal maintains a linewidth of 7.1 kHz nearly identical with that of the seed, both with a signal-to-noise ratio of more than 60 dB. This all-optical technique on noise suppression applied to the fiber amplifier paves the way to realize low-noise SFFL with power improvement.
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