Experimental measured for the effects of broadband pulse on the B-integral of small-scale self-focusing

Jin Zhang; Shuangchun Wen; Xiquan Fu; Lifu Zhang; Jianqin Deng; Dianyuan Fan

doi:10.1117/12.870419

16 November 2010 Experimental measured for the effects of broadband pulse on the B-integral of small-scale self-focusing

Jin Zhang, Shuangchun Wen, Xiquan Fu, Lifu Zhang, Jianqin Deng, Dianyuan Fan

Author Affiliations +

Proceedings Volume 7843, High-Power Lasers and Applications V; 78431T (2010) https://doi.org/10.1117/12.870419
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

It is well known that small-scale self-focusing is one of the major factors to restrict the capability and efficiency of high-power solid-state laser driver. B-integral is used to measure the severity extent of small-scale self-focusing and the typical value of B-integral is less than 1.8 in narrow band high power laser by NIF. We experimentally obtained the relationship of B-integral with spatial contrast for broadband pulse in case of active modulation and random noise modulation, and found that the growth of contrast is still very slow after B-integral up to 1.8 for 12 nm ultrashort pulse laser. So we can consider that the broadband laser is able to unloosen B-Integral criterion and then improve the system loading.

Citation Download Citation

Jin Zhang, Shuangchun Wen, Xiquan Fu, Lifu Zhang, Jianqin Deng, and Dianyuan Fan "Experimental measured for the effects of broadband pulse on the B-integral of small-scale self-focusing", Proc. SPIE 7843, High-Power Lasers and Applications V, 78431T (16 November 2010); https://doi.org/10.1117/12.870419

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