Spectroscopy of vanadium (III) doped gallium lanthanum sulphide chalcogenide glass

TL;DR

This study characterizes the optical properties of vanadium (III) doped gallium lanthanum sulphide glass, revealing its potential for laser and optical amplifier applications due to its broad photoluminescence and specific absorption features.

Contribution

It provides detailed spectroscopic data and proposes the valence state and coordination of vanadium ions in V:GLS, highlighting its suitability for photonic devices.

Findings

Identified three absorption bands at 580, 730, and 1155 nm.

Observed broad photoluminescence peaking at 1500 nm with 500 nm FWHM.

Measured fluorescence lifetime of 33.4 microseconds and quantum efficiency of 4%.

Abstract

Vanadium doped gallium lanthanum sulphide glass (V:GLS) displays three absorption bands at 580, 730 and 1155 nm identified by photoluminescence excitation measurements. Broad photoluminescence, with a full width half maximum (FWHM) of 500 nm, is observed peaking at 1500 nm when exciting at 514, 808 and 1064 nm. The fluorescence lifetime and quantum efficiency at 300 K were measured to be 33.4 us and 4 % respectively. From the available spectroscopic data we propose the vanadium ions valence to be 3+ and be in tetrahedral coordination The results indicate potential for development of a laser or optical amplifier based on V:GLS.