Broadband near-infrared emission from transparent Ni2+-doped silicate glass ceramics

Abstract

Transparent Ni2+-doped MgO–Al2O3–TiO2–SiO2 glass ceramics were prepared, and the optical properties of Ni2+-doped glass ceramics were investigated. Broadband emission centered at 1320nm was observed by 980nm excitation. The longer wavelength luminescence compared with Ni2+-doped Li2O–Ga2O3–SiO2 glass ceramics is ascribed to the low crystal field hold by Ni2+ in MgO–Al2O3–TiO2–SiO2 glass ceramics. The change in optical signals at the telecommunication bands with or without 980nm excitation was also measured when the seed beam passes through the bulk gain host.

Spectroscopic properties of Ni2+ and rare-earth codoped Ge–Ga–Sb–S glass

“…Although A c c e p t e d m a n u s c r i p t recent works on the infrared emission properties of Ni 2+ -doped oxide glass-ceramics seem very promising [12,13]. Our results, however, suggest that to obtain RE doped GGS glasses of stronger infrared luminescence it is necessary to keep the nickel dopant as low as possible.…”

“…It is the first report, as far as we know, on the infrared emission of Ni 2+ ions in ChG glasses. The emission peak of Ni 2+ ions is centered at 1327 nm, which is longer than that has been found in oxide glass-ceramics [13]. On the other hand, the emission intensities of Ni/RE codoped glasses are reduced to half of RE doped glasses.…”

“…This is due to the intense absorption of host glass. It is believed that only octahedral Ni 2+ ions are active in the infrared emission [12][13]18]. Considering the fact that the broadband infrared emission does occur in our glass samples (inset in Fig.…”

“…3, the infrared emission intensities of Ni/RE codoped glasses are much lower than RE doped glasses. In view of the rather close emission peaks of Dy 3+ (1323 nm), Sm 3+ (1335 nm) and Pr 3+ (1337 nm) ions to that of Ni 2+ ions (1327 nm), strong excited absorption of Ni 2+ ions at room temperature is likely to happen in Ni/RE codoped glasses, and this is also the reason why it is not easy to realize optical amplification and lasing in Ni 2+ doped glasses and crystals [13]. However, enhanced infrared emission of Ni 2+ in oxide GCs has been observed with proper chosen of sensitizer, such as Yb 3+ ions [20].…”

Glass-ceramics for photonic devices

“…Recently, great progress has been achieved in the OH elimination of silica fibers, and as a result, the telecommunication transmission has been extended to the range from 1.2 to 1.7¯m. 23) Therefore, considerable effort has been devoted to the development of optical fiber amplifiers which can be used to produce optical gain at different communication bands. For examples, erbium (Er)-doped fiber amplifiers provide gain in the C band (15301565 nm), L band (15701605 nm) and S band (1450 1520 nm).…”