论文部分内容阅读
利用在中红外波段具有低损耗的ZBLAN(ZrF4-BaF2-LaF3-AlF3-NaF)氟化物单模光纤搭建了全光纤结构的超连续谱光源,将超连续谱在长波方向扩展到中红外波段。系统以波长为1550nm的纳秒脉冲半导体激光器作为种子源,采用主振荡功率放大结构实现了级联超连续谱产生。在前级超连续谱产生中将光谱预展宽到2.6μm,再经掺铥双包层光纤放大器放大位于铥离子增益带宽内的光谱分量,最后抽运10m长的ZBLAN单模光纤,在光纤色散和非线性效应的作用下,获得了光谱覆盖1.9~4.3μm范围的中红外超连续谱输出,平均功率为185mW。
A supercontinuum light source with all-fiber structure was constructed by using ZBLAN (ZrF4-BaF2-LaF3-AlF3-NaF) fluoride single-mode fiber with low loss in the mid-infrared band and extended the supercontinuum to the mid- The system uses a nanosecond-pulsed semiconductor laser with a wavelength of 1550 nm as a seed source, and a cascaded supercontinuum generation is achieved by using a main oscillator power amplification structure. In the pre-supercontinuum generation, the spectrum was pre-stretched to 2.6μm, and then doped by a double-clad fiber amplifier to amplify the spectral component located in the ion gain bandwidth. Finally, 10m long ZBLAN single-mode fiber was pumped, And the non-linear effect, the mid-IR supercontinuum output with the spectral coverage of 1.9 ~ 4.3μm was obtained with the average power of 185mW.