Beam quality measurement of high power laser by using an involute pinhole array

A novel method for power-in-the-bucket (PIB) measurement of high power laser beams is proposed. The laser beam spot was first sampled by a rotating involute pinhole array and then collected by using a photodetector placed behind the pinholes. The spatial–temporal distribution and calibrated PIB curv...

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Bibliographic Details
Published in:Review of scientific instruments 2021-05, Vol.92 (5), p.053001-053001
Main Authors: Chen, Shaowu, Yang, Pengling, Luan, Kunpeng, Wu, Junjie, Feng, Gang, Zhao, Haichuan
Format: Article
Language:English
Subjects:
Arrays
High power lasers
Laser beams
Lasers
Measurement methods
Pinholes
Quality assessment
Scientific apparatus & instruments
Temporal distribution
Temporal resolution
Vibration
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Summary:A novel method for power-in-the-bucket (PIB) measurement of high power laser beams is proposed. The laser beam spot was first sampled by a rotating involute pinhole array and then collected by using a photodetector placed behind the pinholes. The spatial–temporal distribution and calibrated PIB curve of the laser beam can be obtained. The spatial and temporal resolution is 20 µm and 5 ms, respectively. Compared with conventional methods, the proposed measurement method is simple, convenient, and accurate, which is suitable for high power laser beams with jitter.
ISSN:0034-6748
1089-7623
DOI:10.1063/5.0037332