Infrared luminescence and amplification properties of Bi-doped GeO2−Ga2O3−Al2O3 glasses

Abstract

Bi, Ga, and Al codoped germanium glass was prepared and its optical properties were investigated by absorption, photoluminescence excitation ͑PLE͒, and photoluminescence spectra. Two active centers which occupy strong and weak crystal field environment are identified by using the PLE spectrum. The tunable and ultrabroadband luminescence properties are originated from electron transitions of these two active centers. Internal optical gain around 1300 and 1560 nm has been detected. The wavelength-dependent internal gains excited with 808 and 980 nm laser diodes show different characteristics, and the relative flat optical amplification can be realized by choosing 980 nm pumping.

Ultra-broadband optical amplification at telecommunication wavelengths achieved by bismuth-activated lead iodide perovskites

“…Previously, optical amplification has been realized in Bi-doped bulk materials (e.g., glasses) under high excitation power densities. 4,[32][33][34] We find that the maximum value achieved using our system is over five orders of magnitude larger than those achieved in Bi-doped bulk materials (Table S2, ESI † and Fig. 5).…”

NMR, ESR, and Luminescence Characterization of Bismuth Embedded Zeolites Y

“…These findings represent an important contribution to the understanding of the processes involved in the formation of Bi + and of the luminescence mechanisms of Bi + substructures in zeolite Y frameworks. These results are not only helpful for the in-depth understanding of experimentally observed photophysical properties in a number of Bi-doped materials, ,,− but also important for the development of novel photonic material systems activated by other p-block elements.…”

Bi-doped BaF_2 crystal for broadband near-infrared light source

“…The broadband luminescence has been proposed to be contributed to two (emissions center at 1110 and 1240 nm) or three types (emissions center at 1130, 1286 and 1420 nm) active centers [16,17]. In order to further investigate the detailed attributions of the observed emissions, the corresponding excitation spectra were measured and also shown in Fig.…”