Quantum-efficiency of praseodymium doped Ga:La:S glass for 1.3 /spl mu/m optical fibre amplifiers

The gain of Pr/sup 3+/-doped ZBLAN fibre amplifiers is hindered by a poor quantum efficiency due mainly to a high rate of multiphonon decay. Sulphide-based glasses ameliorate this problem through a higher radiative rate and lower nonradiative rate. In this letter, Pr/sup 3+/-doped Ga:La:S glass has...

Full description

Saved in:
Bibliographic Details
Published in:IEEE photonics technology letters 1994-05, Vol.6 (5), p.609-612
Main Authors: Hewak, D.W., Medeiros Neto, J.A., Samson, B., Brown, R.S., Jedrzejewski, K.P., Wang, J., Taylor, E., Laming, R.I., Wylangowski, G., Payne, D.N.
Format: Article
Language:English
Subjects:
Absorption
Crystallization
Energy states
Glass
Optical fiber amplifiers
Optical fiber theory
Optical fibers
Semiconductor optical amplifiers
Spectroscopy
Stimulated emission
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The gain of Pr/sup 3+/-doped ZBLAN fibre amplifiers is hindered by a poor quantum efficiency due mainly to a high rate of multiphonon decay. Sulphide-based glasses ameliorate this problem through a higher radiative rate and lower nonradiative rate. In this letter, Pr/sup 3+/-doped Ga:La:S glass has been evaluated spectroscopically in bulk and fibre form for its quantum-efficiency at 1.3 microns. Measurements reveal that absorption bands are broadened and the effective separation between the /sup 1/G/sub 4/ and /sup 3/F/sub 4/ level is reduced compared to ZBLAN glass. Judd-Ofelt analysis and the theory of multiphonon-decay now predict efficiencies of 80%, while 58% is measured. Oxide impurities are shown to play a key role in quenching of the radiative emission.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.285556