Ultraviolet nanosecond laser-induced damage on potassium dihydrogen phosphate crystal surface originated from different defects

Feng Geng, Mincai Liu, Qinghua Zhang, Zhichao Liu, Qiao Xu, Yaguo Li

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Nanosecond UV laser-induced surface damage of potassium dihydrogen phosphate samples was investigated and discussed by means of defect characterization, in situ damage test, as well as pump-probe shadowgraph imaging. Two distinctive types of surface damage induced by different defects have been demonstrated. Surface damage occurring at relative lower fluence (typically below 5 J / cm2 in our experiment) is highly correlated with fluorescent surface defects, which are considered as fractural structures introduced by surface cutting. The other type of surface damage that always occurs at higher fluence (above 8 J / cm2) is confirmed to originate from the bulk damage precursor located near the crystal surface.

Original languageEnglish
Article number031003
JournalOptical Engineering
Volume60
Issue number3
DOIs
StatePublished - 1 Mar 2021
Externally publishedYes

Keywords

  • defect characterization
  • laser-induced damage
  • potassium dihydrogen phosphate crystal
  • time-resolved shadowgraph

Fingerprint

Dive into the research topics of 'Ultraviolet nanosecond laser-induced damage on potassium dihydrogen phosphate crystal surface originated from different defects'. Together they form a unique fingerprint.

Cite this