基于掺铒光纤作为可饱和吸收体的窄线宽光纤激光器研究  

Research on Narrow Linewidth Fiber Laser Based on Erbium Doped Fiber as Saturable Absorber

作　　者：张福宇 王蓟[1] 薛明昆 衣文索[2] 

机构地区：[1]长春理工大学物理学院,吉林 长春 [2]长春理工大学光电工程学院,吉林 长春

出　　处：《应用物理》2024年第4期157-165,共9页Applied Physics

摘　　要：本文介绍了一种以未泵浦的掺铒光纤作为可饱和吸收体,通过3 dB耦合器及环形器,构成一个由驻波效应形成动态光栅的一种窄线宽光纤激光器。测得在中心波长在1559.54 nm处得到输出的激光器,在泵浦功率为150 mW以下时可以保持长时间的稳定工作,泵浦功率为70 mW,输出光功率为17.03 mW,斜率效率为30.73%,光学信噪比为39 dB,波长分辨率的不稳定性小于0.03 nm,光学信噪比的波动小于0.16 dB,从0到1 MHz的37.5 kHz信号频谱中的弛豫振荡频率峰值为−89.6 dB/Hz。通过延时自外差法测量线宽为1.99 kHz。This article introduces a narrow linewidth fiber laser that uses an unpumped erbium-doped fiber as a saturable absorber and a 3 dB coupler and circulator to form a dynamic grating formed by the standing wave effect. The laser output obtained at the center wavelength of 1559.54 nm can maintain stable operation for a long time when the pump power is below 150 mW. The pump power is 70 mW, the output optical power is 17.03 mW, the slope efficiency is 30.73%, the optical signal-to-noise ratio is 39 dB, the wavelength resolution instability is less than 0.03 nm, the fluctuation of the optical signal-to-noise ratio is less than 0.16 dB, and the peak relaxation oscillation frequency in the 37.5 kHz signal spectrum from 0 to 1 MHz is −89.6 dB/Hz. The line width was measured to be 1.99 kHz using the delayed self heterodyne method.

关 键 词：光纤激光器 窄线宽 动态光栅 可饱和吸收体 

分 类 号：TN2[电子电信—物理电子学]