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

被引：1
|
作者：
Zhang, Jin [1 ]
Wen, Shuangchun [1 ]
Fu, Xiquan [1 ]
Zhang, Lifu [1 ]
Deng, Jianqin [1 ]
Fan, Dianyuan [1 ]
机构：
[1] Hunan Univ, Key Lab Micro Nano Optoelect Devices, Minist Educ, Sch Informat Sci & Engn, Changsha 410082, Hunan, Peoples R China
来源：
HIGH-POWER LASERS AND APPLICATIONS V | 2010年 / 7843卷
关键词：
broadband pulse; B-integral; small-scale self-focusing; modulation growth; VARYING ENVELOPE APPROXIMATION; NORMALLY DISPERSIVE MEDIA; FEMTOSECOND PULSES; ANGULAR-DISPERSION; OPTICAL PULSES; 5; FS; LIGHT; COMPRESSION; PROPAGATION; THRESHOLD;
D O I：
10.1117/12.870419
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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.
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页数：9
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