Measuring fluence distribution of intense short laser based on the radiochromic effect

This Letter demonstrates a novel, to the best of our knowledge, method to measure the fluence distribution of an intense short laser pulse based on the radiochromic effect. We discovered that an intense short laser pulse can induce the color reaction with a radiochromic film (RCF). Further, the net...

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Bibliographic Details
Published in:Optics letters 2021-06, Vol.46 (11), p.2795-2798
Main Authors: He, Yunxiao, Hong, Wei, Hua, Jianfei, Qi, Wei, Zhang, Zhimeng, Li, Gang, Cui, Bo, Lu, Feng, Deng, Zhigang, He, Shukai, Su, Jingqin, Zhou, Weimin, Lu, Wei, Gu, Yuqiu
Format: Article
Language:English
Subjects:
Fluence
Laser applications
Lasers
Optical density
Spatial resolution
Splicing
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Summary:This Letter demonstrates a novel, to the best of our knowledge, method to measure the fluence distribution of an intense short laser pulse based on the radiochromic effect. We discovered that an intense short laser pulse can induce the color reaction with a radiochromic film (RCF). Further, the net optical density of an irradiated RCF is proportional to the fluence of the incident laser pulse in a large range ( 2 − 120 m J / c m 2 ). This method supports a large detection area up to near square-meter scale by splicing multi-pieces of RCFs ( 8 × 10 i n c h 2 each). The spatial resolution reaches as high as 60 lines/mm. It offers a thin-film ( ∼ 100 µ m thick), flexible, vacuum-compatible solution to intense short laser measurements, especially to laser facilities above petawatt, with beam sizes up to near square-meter scale, e.g., extreme light infrastructure.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.424698