Laser intensity distribution measuring method based on fiber array

Wu Yong; Yang Pengling; Chen Shaowu; Liu Weiping; Wu Junjie; Tao Mengmeng; Liu Fuhua; Feng Guobin; Ye Xisheng

doi:10.3788/HPLPB20132502.0276

Volume 25 Issue 02

Dec. 2012

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(02): 276-280

Wang Ling, Wang Xin, Mu Baozhong, et al. Influence of mounting stress on the surface shape of Schwarzschild objective[J]. High Power Laser and Particle Beams, 2013, 25: 2599-2603. doi: 10.3788/HPLPB20132510.2599

Citation:

Wu Yong, Yang Pengling, Chen Shaowu, et al. Laser intensity distribution measuring method based on fiber array[J]. High Power Laser and Particle Beams, 2013, 25: 276-280. doi: 10.3788/HPLPB20132502.0276

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Laser intensity distribution measuring method based on fiber array

doi: 10.3788/HPLPB20132502.0276

1.
State Key Laboratory of Laser Interaction with Matter,Northwest Institute of Nuclear Technology,Xi’an 710024,China

Received Date: 2012-05-09
Rev Recd Date: 2012-07-12
Publish Date: 2013-02-10

Abstract

Abstract

A method for measuring laser intensity distribution based on fiber array is presented. The principle and structural design of the fiber array are introduced. The attenuation characteristic is analyzed theoretically. A demonstration module is built in our lab. And experiments are carried out with a high power fiber laser operating at 1064 nm. The experimental results show that this system can provide laser power density distribution information with a spatial resolution better than 3 mm and with a measurement error less than 3%. Experiments with fiber laser radiation and numerical simulation by the finite element method indicate that the damage threshold of the fiber array is higher than 10 kW/cm2 with a radiation time of 50 s. Therefore, it might be appropriate for the method to measure the high energy laser beam directly.
- high energy laser,
- spot measurement,
- fiber array,
- V-groove,
- fused silica

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