Band-stop angular filtering with hump volume Bragg gratings

Band-stop angular filtering with hump volume Bragg gratings
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带驼峰体布拉格光栅的带阻角度滤波

DOI:
10.1017/hpl.2019.12
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发表时间:
2019-03
期刊:
High Power Laser and Engineering
影响因子:
--
通讯作者:
Xiao Yuan
Xiao Yuan
中科院分区:
其他
文献类型:
--
作者:
Fan Gao;Xin Wang;Tiancheng Yu;Xiang Zhang;Xiao Yuan

文献摘要

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相似文献

提出了一种基于驼峰体Bragg光栅的带阻角滤波器(BSF)。对两级放大激光系统中的带阻滤波进行了讨论和仿真。仿真结果表明,由于控制了光束在特定空间频率范围内的快速非线性增长,BSF可以有效地抑制激光系统中的小尺度自聚焦效应。利用BSF控制空间频率从$0.6~\text{mm}^{-1}$到$1.2~\text{mm}^{-1}$的快速非线性增长,使系统输出光束的近场调制从2.69降低到1.37。此外,BSF可用于即插即用方案,并在高功率激光系统中具有潜在的应用。
A band-stop angular filter (BSF) based on hump volume Bragg gratings (HVBGs) is proposed. Band-stop filtering in a two-stage amplifier laser system is discussed and simulated. Simulation results show that small-scale self-focusing effects in the laser system can be effectively suppressed with the BSF due to the control of fast nonlinear growth in a specific range of spatial frequencies in the laser beam. Near-field modulation of the output beam from the laser system was decreased from 2.69 to 1.37 by controlling the fast nonlinear growth of spatial frequencies ranging from $0.6~\text{mm}^{-1}$ to $1.2~\text{mm}^{-1}$ with the BSF. In addition, the BSF can be used in a plug-and-play scheme and has potential applications in high-power laser systems.
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