Dicing of sapphire wafer with all-fiber picosecond laser

被引：0
|
作者：
Hu X. [1 ]
Hao Q. [1 ]
Guo Z. [1 ]
Zeng H. [1 ,2 ]
机构：
[1] School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai
[2] State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai
来源：
Hao, Qiang (qianghao@usst.edu.cn) | 1600年 / Science Press卷 / 44期
关键词：
Fiber laser; Laser manufacturing; Sapphire wafer; Stealth dicing; Ultrafast pulse;
D O I：
10.3788/CJL201744.0102016
中图分类号：
学科分类号：
摘要：
An all-fiber ultrafast laser system was demonstrated by utilizing polarization-maintaining fibers and polarization-maintaining fiber components. The central wavelength of the system was 1064 nm. A passively mode-locked fiber laser, a pulse selector, and subsequent fiber amplifiers realized micro joule pulse energy with tunable repetition rate and alterable pulse number in a single pulse string. In addition, an application of this laser system was carried out on dicing of 110 μm thick sapphire wafer. Experimental results showed that the pulse energy, the pulse number in a single pulse string, and the beam quality significantly affected the ablation performance. Up to 99.58% yield rate was achieved by using 100 kHz repetition rate, 7 pulses in a pulse string, 97% beam circularity, 0.37 W average power, and 600 mm/s dicing speed. © 2017, Chinese Lasers Press. All right reserved.
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页数：7
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