Experimental Investigation on Spectral Linewidth and Relative Intensity Noise of High-Power Single-Frequency Polarization-Maintained Thulium-Doped Fiber Amplifier

被引：0
|
作者：
Zhang, Haiwei
Cao, Yang
Shi, Wei [1 ]
Sheng, Quan
Bai, Xiaolei
Fu, Shijie
Yao, Jianquan
机构：
[1] Tianjin Univ, Inst Laser & Optoelect, Coll Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China
来源：
IEEE PHOTONICS JOURNAL | 2016年 / 8卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Single-frequency fiber laser; thulium-doped fiber amplifier; linewidth; delayed self-heterodyne; relative intensity noise; LASER; RELAXATION;
D O I：
10.1109/JPHOT.2016.2564443
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We investigate the spectral linewidth and relative intensity noise (RIN) of an all-fiber single-frequency polarization-maintained master oscillator and power amplifier at 1925 nm. It is found that the linewidth of the fiber amplifier is related to the power ratio of signal laser to accumulated amplified stimulated emission noises. A 3-dB linewidth of 56 kHz is measured at a maximum output power of 45 W, resulting to a linewidth broadening of 20 kHz compared to the 36-kHz linewidth of the seed laser. The RINs of the pre-amplifier and the power amplifier are measured to be -108 and -90 dBm/Hz at the relaxation frequency, respectively.
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页数：8
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