Spectroscopy and quantum efficiency of halide-modified gallium lanthanum sulfide glasses doped with praseodymium
Abstract
The production of competitive fibre amplifiers in the 1.3 μm region requires both good quantum efficiency in the lasing ion and the capability to produce low-loss fibers. Alkali metal halide substituted gallium lanthanum sulphide (GLS) doped with Pr 3+ may provide a route to both. We describe measurements of the optical spectroscopy and radiative quantum efficiency (RQE) of Pr 3+ emission at 1.3 μm from the 1G 4- 3H 5 transition in GLS glass containing CsCl, CsI, and RbCl. The results indicate that CsCl-containing GLS glasses, which have better thermal and glass-forming properties than pure GLS, can show quantum efficiencies of up to ∼80% of that of pure GLS, and thus are good candidates for 1.3 μm fiber amplifiers.
- Publication:
-
Journal of Non Crystalline Solids
- Pub Date:
- October 1998
- DOI:
- 10.1016/S0022-3093(98)00735-2
- Bibcode:
- 1998JNCS..239..176H