18.4W皮秒光纤激光器及其全光纤化超连续谱源

摘要

Using a passive mode-locked fiber ring resonator, a 85 MHz picosecond fiber laser with output power of 4 mW was realized.This seed laser was then amplifiered to 18.4 W with a line width of 5.7 nm utilizing a tri-stage master oscillator power amplifier (MOPA) configuration.With a self-made mode field adaptor ( MFA), the all-fiber efficient coupling of this high power picosecond double clad fiber laser with a 50 m-long high-nonlinear photonic crystal fiber was achieved, consequently.An all-fiber supercontinuum source of 3.6 W was demonstrated with a 10 dB spectral flatness in the 1 700 nm spectral range from 500 to 2 200 nm.%采用光纤非线性环形腔被动锁模方案,研制毫瓦级掺镒皮秒光纤激光器,对其进行3级主振荡功率放大(master oscillator power amplifier,MOPA),得到功率18.4 W,重复频率85 MHz,线宽5.7 nm的高质量皮秒激光输出.利用自主研发的模场适配器,实现了此高功率皮秒激光器对长度为50 m高非线性光子晶体光纤的高效全光纤化泵浦,研制了输出功率为3.6 W的全光纤化宽带超连续谱光源,其在1 700nm(500～2 200 nm)的带宽范围内具有10 dB的光谱平坦度.