Open AccessMillisecond laser machining of transparent materials assisted by nanosecond laser
Author(s) -
Yunxiang Pan,
Hongchao Zhang,
Jun Chen,
Bing Han,
Zhonghua Shen,
Jian Lü,
Xiaowu Ni
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.000765
Subject(s) - millisecond , nanosecond , laser , materials science , optics , x ray laser , machining , laser beam machining , optoelectronics , irradiation , laser power scaling , laser beams , physics , astronomy , nuclear physics , metallurgy
A new form of double pulse composed of a nanosecond laser and a millisecond laser is proposed for laser machining transparent materials. To evaluate its advantages and disadvantages, experimental investigations are carried out and the corresponding results are compared with those of single millisecond laser. The mechanism is discussed from two aspects: material defects and effects of modifications induced by nanosecond laser on thermal stress field during millisecond laser irradiation. It is shown that the modifications of the sample generated by nanosecond laser improves the processing efficiency of subsequent millisecond laser, while limits the eventual size of modified region.