In this paper, we innovatively conduct a porro prism based beam pointing stability promotion technique research and realize high-performance rod-type photonic crystal fiber based chirped pulse amplification (CPA) system; mainly including a frequency-reduced all-fiber pre-amplification stage, photonic crystal rod based main amplification stage, and 1600 lines/mm transmission grating-pair compressor. Laser output with average power of 50 W, repetition rates of 500 kHz, pulse energy of 100 uJ, pulse duration of 830 fs, beam quality of M2<1.3, power fluctuation of 0.55% RMS and beam pointing drift of 19 urad/℃ over 8 h, is realized. The high-performance laser system has an enormous application potential in fundamental research and precision manufacturing fields.
Lv Zhiguo, Yang Zhi, Li Qianglong , Li Feng, yang Xiaojun, Wang Yishan, Zhao Wei. Photonic crystal rod based high-performance ultrafast fiber laser system[J]. High Power Laser Science and Engineering, , (): .
