Experiment on delivery of megawatt Nd:YAG laser pulses by large-core optical fibers

被引：2
|
作者：
Zhao X. [1 ]
Hu J. [2 ]
Gao Y. [1 ]
Ma P. [2 ]
Tan G. [1 ]
Wu J. [1 ]
机构：
[1] Institute of Electronic Engineering, China Academy of Engineering Physics
[2] Chengdu Fine Optical Engineering Research Center
来源：
Zhongguo Jiguang/Chinese Journal of Lasers | 2010年 / 37卷 / 08期
关键词：
Fiber optics; High-peak power laser; Laser beam delivery; Laser damage;
D O I：
10.3788/CJL20103708.1934
中图分类号：
学科分类号：
摘要：
The experimental study on transmission characteristics of high-peak power laser pulses with width of 5 ns and wavelength of 1064 nm via all-silica fibers with core diameter of 600 μm are demonstrated. According to N-ON-1 test mode, the laser induced fiber damage threshold and transmission efficiency curve are obtained. The 50% probability damage threshold is 24 mJ, the average output energy is 14 mJ, and the peak power approaches to 3 MW. The three processes of fiber delivery high-peak power laser pulsed are presented, which are undamaged stage (steady state), laser-induced plasma stage (unsteady state) and laser-induced fiber core damage stage (transmission cut-off). The damaged morphologies and damage mechanism are investigated. The synchronous increases of laser induced plasma threshold and entry damage threshold can improve optical fiber capability for high power laser delivery.
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页码：1934 / 1938
页数：4
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