The University of Southampton
University of Southampton Institutional Repository

Efficient erbium-doped fibre amplifiers incorporating an optical isolator

Zervas, M.N., Laming, R.I. and Payne, D.N. (1995) Efficient erbium-doped fibre amplifiers incorporating an optical isolator IEEE Journal of Quantum Electronics, 31, (3), pp. 472-80. (doi:10.1109/3.364402).

Record type: Article


A composite-EDFA configuration which incorporates an optical isolator has been investigated theoretically and experimentally. The isolator prevents the build-up of the backward-ASE and results in an amplifier with high gain and near-quantum-limited noise figure (NF). The optimum position of the isolator has been calculated as a function of the pump power so that minimum NF and maximum gain are achieved simultaneously. It is shown that under practical pump powers, the optimized composite EDFA exhibits a gain improvement of about 5 dB and a NF reduction in excess of 1.5 dB when compared with an optimized conventional EDFA. It is also shown that with further optimization the composite EDFA can be employed in a practical fiber link as a pre-amplifier without the use of an input isolator. Finally, a high-gain composite EDFA has been experimentally demonstrated which exhibits a gain of 51 dB (54 dB) and NF of 3.1 dB for only 435 mW (93 mW) of pump power.

Full text not available from this repository.

More information

Published date: 1995


Local EPrints ID: 78278
ISSN: 0018-9197
PURE UUID: 12e94920-1e9d-4d77-b6b2-661ab76ecb7b

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:25

Export record



Author: M.N. Zervas
Author: R.I. Laming
Author: D.N. Payne

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.