论文信息 - Radiation defects in LiNbO3 single crystals doped with Cr3+ ions

Radiation defects in LiNbO3 single crystals doped with Cr3+ ions

Absorption and additional absorption of LiNbO 3 crystals doped with Cr 3+ during growth or by diffusion process were investigated before and after γ-irradiation with a dose of 10 5 Gy and also before and after proton irradiation with a fluency of 10 14 cm -2 . It was found that chromium ions may be mtroduced into LiNbO 3 crystals also as Cr 2+ . ESR measurements of Cr:LiNbO 3 crystals irradiated by γ-rays and electrons were performed. Paramagnetic peak after γ and electron irradiation was observed, which vanishes after annealing at 400°C for 3h both in optical and ESR spectra. Mn 2+ lines were also observed, which diminish after electron irradiation only.

[1] Zhao,et al. Electron-spin-resonance studies of Cr-ion pairs in LiNbO3:Cr3+ , 1991, Physical Review B (Condensed Matter).

[2] C. Canali,et al. Fabrication and characteristics of optical waveguides on LiNbO3 , 1983 .

[3] T. Maruyama,et al. Color Centers in ?-Irradiated Ruby , 1964 .

[4] C. Ironside,et al. Chromium diffusion in lithium niobate for active optical waveguides , 1995 .

[5] I. Földvári,et al. An infrared absorption band caused by OH− ions in a LiNbO3:Mg, Cr crystal , 1988 .

[6] Michel J. F. Digonnet,et al. Nd:MgO:LiNbO 3 spectroscopy and laser devices , 1986 .

[7] Y. M. Kim,et al. Electron‐Spin Resonance Studies of Crystal Field Parameters in Mn2+: LiNbO3 , 1972 .

[8] R. Scheps. Cr-doped solid state lasers pumped by visible laser diodes , 1992 .