Abstract

A millisecond laser combined with a nanosecond laser was applied to machining transparent materials. The influences of delay between the two laser pulses on processing efficiencies and modified sizes were studied. In addition, a laser-supported combustion wave (LSCW) was captured during laser irradiation. An optimal delay corresponding to the highest processing efficiency was found for cone-shaped cavities. The modified size as well as the lifetime and intensity of the LSCW increased with the delay decreasing. Thermal cooperation effects of defects, overlapping effects of small modified sites, and thermal radiation from LSCW result in all the phenomena.

© 2016 Optical Society of America

Millisecond laser machining of transparent materials assisted by nanosecond laser

Yunxiang Pan, Hongchao Zhang, Jun Chen, Bing Han, Zhonghua Shen, Jian Lu, and Xiaowu Ni
Opt. Express 23(2) 765-775 (2015)

Nanosecond-millisecond combined pulse laser drilling of alumina ceramic

Xianshi Jia, Jing Dong, Yongqian Chen, Hailin Wang, Guangzhi Zhu, Aleksei Kozlov, and Xiao Zhu
Opt. Lett. 45(7) 1691-1694 (2020)

Laser damage growth with picosecond pulses

Martin Sozet, Jérôme Neauport, Eric Lavastre, Nadja Roquin, Laurent Gallais, and Laurent Lamaignère
Opt. Lett. 41(10) 2342-2345 (2016)

Increase in nanosecond laser-induced damage threshold of sapphire windows by means of direct dielectric barrier discharge plasma treatment

Christoph Gerhard, Daniel Tasche, Norbert Munser, and Helene Dyck
Opt. Lett. 42(1) 49-52 (2017)

Surface damage induced by a combined millisecond and nanosecond laser

Xueming Lv, Yunxiang Pan, Zhichao Jia, Zewen Li, and Xiaowu Ni
Appl. Opt. 56(17) 5060-5067 (2017)