Hoogland H, Wittek S, Hänsel W, Stark S, Holzwarth R
Opt Lett. 2014 Dec 1;39(23):6735-8. doi: 10.1364/OL.39.006735.
An all-polarization maintaining (PM) fiber chirped pulse amplifier system at 2.08 μm based on thulium:holmium codoped gain fibers is reported. An inhouse built oscillator emits pulses at a repetition rate of 7 MHz with a spectral full width at half-maximum (FWHM) bandwidth of 23.5 nm at 2.8 mW average output power. The pulses are temporally stretched and subsequently amplified in a double-stage amplifier setup. The stretched pulses are compressed to 383 fs by use of a Martinez-style setup at an output pulse energy of 10.2 nJ. By neglecting temporal stretching, high peak powers in a single amplifier stage led to Raman soliton formation at 2.3 μm.
报道了一种基于掺铥钬增益光纤的全保偏（PM）光纤啁啾脉冲放大器系统，其工作波长为2.08μm。一个自制的振荡器以7MHz的重复频率发射脉冲，在平均输出功率为2.8mW时，其光谱半高宽（FWHM）带宽为23.5nm。脉冲在时间上被展宽，随后在一个两级放大器装置中被放大。利用马丁内斯型装置将展宽后的脉冲压缩至383fs，输出脉冲能量为10.2nJ。若忽略时间展宽，单个放大器级中的高峰值功率会导致在2.3μm处形成拉曼孤子。
