Beam Uniformity of Flat Top Lasers

被引:1
|
作者
Chang, Chao [1 ]
Cramer, Larry [1 ]
Danielson, Don [1 ]
Norby, James [1 ]
机构
[1] Continuum Inc, San Jose, CA 95134 USA
来源
LASER RESONATORS, MICRORESONATORS, AND BEAM CONTROL XVII | 2015年 / 9343卷
关键词
flat top; beam uniformity; beam profile visualization; hot spot; beam structure; automatic detection; high energy laser; quality control;
D O I
10.1117/12.2077852
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Many beams that output from standard commercial lasers are multi-mode, with each mode having a different shape and width. They show an overall non-homogeneous energy distribution across the spot size. There may be satellite structures, halos and other deviations from beam uniformity. However, many scientific, industrial and medical applications require flat top spatial energy distribution, high uniformity in the plateau region, and complete absence of hot spots. Reliable standard methods for the evaluation of beam quality are of great importance. Standard methods are required for correct characterization of the laser for its intended application and for tight quality control in laser manufacturing. The International Organization for Standardization (ISO) has published standard procedures and definitions for this purpose. These procedures have not been widely adopted by commercial laser manufacturers. This is due to the fact that they are unreliable because an unrepresentative single-pixel value can seriously distort the result. We hereby propose a metric of beam uniformity, a way of beam profile visualization, procedures to automatically detect hot spots and beam structures, and application examples in our high energy laser production.
引用
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页数:8
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