外文题目: Numerical investigation of output beam quality in efficient broadband optical parametric chirped pulse amplification
作者: Liu, Xiao-Di; Xu, Lu; Liang, Xiao-Yan
刊名: Opt. Commun.
年: 2017 卷: 383 页： 197--207
英文关键词:
Nonlinear optics; Parametric processes; Laser amplifiers
HIGH-CONVERSION-EFFICIENCY; HIGH-ENERGY; LIGHT-PULSES; LASER-PULSES; HIGH-POWER; 800 NM; SYSTEM; OPTIMIZATION; GENERATION; AMPLIFIER
英文摘要:
We theoretically analyzed output beam quality of broad bandwidth non-collinear optical parametric chirped pulse amplification (NOPCPA) in LiB3O5 (LBO) centered at 800 nm. With a three-dimensional numerical model, the influence of the pump intensity, pump and signal spatial modulations, and the walk-off effect on the OPCPA output beam quality are presented, together with conversion efficiency and the gain spectrum. The pump modulation is a dominant factor that affects the output beam quality. Comparatively, the influence of signal modulation is insignificant. For a low-energy system with small beam sizes, walk-off effect has to be considered. Pump modulation and walk-off effect lead to asymmetric output beam profile with increased modulation. A special pump modulation type is found to optimize output beam quality and efficiency. For a high-energy system with large beam sizes, the walk off effect can be neglected, certain back conversion is beneficial to reduce the output modulation. A trade-off must be made between the output beam quality and the conversion efficiency, especially when the pump modulation is large since. A relatively high conversion efficiency and a low output modulation are both achievable by controlling the pump modulation and intensity. (C) 2016 Elsevier B.V. All rights reserved.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1016/j.optcom.2016.08.082


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