【摘要】 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。更多还原

【Abstract】 All-fiber mid-infrared supercontinuum source is obtained using ZBLAN(ZrF4-BaF2-LaF3-AlF3-NaF) single-mode fiber,which has low transmission loss in this wavelength region.The supercontinuum is extended to mid-infrared wavelength.This scheme is based on multi-stage supercontinum generation in master oscillator power amplifier with nanosecond pulsed semiconductor seed laser operating at 1550 nm.The spectrum of seed laser is extended to 2.6μm in Tm/Ho co-doped fiber,and the wavelength components lying in the gain band of Tm doped fiber are amplified in Tm doped double-clad fiber amplifier and then pump 10-m ZBLAN single-mode fiber.Spectral broadening from1.9μm to 4.3μm with average output power of 185 mW is achieved resulting from the interaction between dispersion and nonlinear effects.更多还原