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报道了一个基于类噪声脉冲抽运的高功率全光纤结构的中红外超连续谱光源。利用非线性环镜锁模技术,在1966 nm处实现类噪声脉冲激光输出,3 d B光谱宽度为11 nm,脉冲包络宽度为1.4 ns,重复频率为3.36 MHz。将该纳秒类噪声脉冲作为两级单模掺铥光纤放大器的种子源进行功率放大。在此过程中,类噪声脉冲的最大输出功率可达28.5 W,相应的光谱范围为1.9~2.4μm。最后将放大的类噪声脉冲耦合到一段10 m长的氟锆酸盐ZBLAN光纤中,实现光谱的进一步展宽。此时,ZBLAN光纤的最大输出功率为14.3 W,相应的光谱范围为1.9~3.62μm。
A mid-infrared supercontinuum light source with high power all-fiber structure based on noise-like pulse pumping is reported. The noise - like pulse laser output was achieved at 1966 nm with a non - linear ring - mode locking technique. The 3 d B spectral width was 11 nm, the pulse envelope width was 1.4 ns and the repetition frequency was 3.36 MHz. The nanosecond-like noise pulse is used as a power source for two-stage single-mode spurious fiber amplifier. In this process, the maximum noise-like output power of up to 28.5 W, the corresponding spectral range of 1.9 ~ 2.4μm. Finally, the amplified noise-like pulse is coupled into a 10-m long fluorozirconate ZBLAN fiber for further spectral broadening. At this point, ZBLAN fiber maximum output power of 14.3 W, the corresponding spectral range of 1.9 ~ 3.62μm.