Laser-induced dark traces in LiNbO3:Zn (7.5 mol. %) and LiNbO3:Mg (6.5 mol. %) crystals have been studied with the crystals as the component for 1064–532-nm second-harmonic generation of Nd:YAG radiation operating in a pulsed mode. The results show that, at high input power density, both crystals suffer from dark traces, which reduce the second-harmonic-generation efficiency. The dark traces are induced by the 532-nm radiation and can be recovered after the laser beam is shut off. The transmission loss spectra show a broad absorption peak near 400 nm.
© 1994 Optical Society of America
Original Manuscript: January 7, 1994
Published: July 1, 1994
Jiachun Deng, Wanlin Zhang, Jinke Wen, Guangyin Zhang, and Huafu Wang, "Pulsed-laser-induced dark traces in LiNbO3:Zn and LiNbO3:Mg," Opt. Lett. 19, 933-935 (1994)