镱铒共掺光纤放大器真空下温度对增益的影响

摘要

The relation of the fiber amplifier gain and emission cross section and absorption cross section of doped fi-ber,the thermal performance of the optical fiber amplifier under vacuum environment are theoretically analyzed.Ex-perimental results show that the gain change is 0.0076 dB /℃under vacuum environment when the input optical sig-nal is at 1550 nm.When the fiber amplifier works 5 minutes at 55 ℃under vacuum environment,Er/Yb co-doped fi-ber temperature drops to 76 ℃ from 106 ℃,the output power fluctuation is less than 10 mW.%理论分析了光纤放大器的增益与掺杂光纤发射截面和吸收截面的关系，真空环境下的光纤放大器的散热性能。实验表明，真空环境下，输入光信号为1550 nm 的情况下，增益以0．0076 dB／℃变化，真空55℃工作5 min，散热措施能使镱铒共掺光纤温度从106℃下降至76℃，输出功率在波动小于10 mW。