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Transient absorption in visible region of K9 glass irradiated by nanosecond laser at 355 nm

F. GENG1,2, J. HUANG1, Q. Z. LI1, H. J. LIU1, F. R. WANG1,* , X. D. JIANG1, W. D. WU1,2

Affiliation

  1. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
  2. Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, Mianyang 621900, China

Abstract

Transient optical absorption properties in visible region of K9 glass under nanosecond ultraviolet (UV) laser irradiation (355 nm, 10 Hz) are investigated and discussed. Both the transient absorption spectra and absorption decay properties are presented in this paper. Transient absorption spectrum of K9 glass under UV laser irradiation shows a broad absorption band with maximum at 450 nm and a shoulder at 600 nm. The observed transient absorption bands in K9 glass are suggested to arise from laser induced defects identified as boron oxygen hole centers (BOHC) and non-bridge oxygen hole centers (NBOHC), respectively. Pump-fluence dependency of transient absorption intensity indicates that nonlinear absorption of the pump laser plays an important role in generating such UV-induced hole centers..

Keywords

transient absorption, laser irradiation, defect, glass.

Submitted at: June 22, 2016
Accepted at: April 6, 2017

Citation

F. GENG, J. HUANG, Q. Z. LI, H. J. LIU, F. R. WANG, X. D. JIANG, W. D. WU, Transient absorption in visible region of K9 glass irradiated by nanosecond laser at 355 nm, Journal of Optoelectronics and Advanced Materials Vol. 19, Iss. 3-4, pp. 218-222 (2017)