外文题目: Polarization beam combination technique for gain saturation effect compensation in high-energy systems
作者: Chen, Junchi; Peng, Yujie; Su, Hongpeng; Leng, Yuxin
刊名: Opt. Eng.
年: 2016 卷: 55 期: 6 文章编号：66111
英文关键词:
laser amplifier; pulse shaping; gain saturation effect; polarization beam combination
FIBER MOPA SYSTEM; PULSE-DISTORTION; LASER-AMPLIFIERS; EFFICIENCY; SHAPE; WAVE
英文摘要:
To compensate for the gain saturation effect in the high-energy laser amplifier, a modified polarization beam combination (PBC) method is introduced to reshape temporal waveform of the injected laser pulse to obtain a controlled high-energy laser pulse shape after amplification. One linearly polarized beam is divided into two orthogonal polarized beams, which spatially recombine together collinearly after propagating different optical paths with relative time delay in PBC structure. The obtained beam with polarization direction being rotated by the following half wave plate is divided and combined again to reform a new beam in another modified polarization beam structure. The reformed beam is injected into three cascaded laser amplifiers. The amplified pulse shape can be controlled by the incident pulse shape and amplifier gain, which is agreeable to the simulation by the Frank-Nodvik equations. Based on the simple method, the various temporal waveform of output pulse with tunable 7 to 20 ns pulse duration can be obtained without interferometric fringes. (C) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1117/1.OE.55.6.066111


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