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Highly-saturated erbium-doped-fibre power amplifiers

Highly-saturated erbium-doped-fibre power amplifiers
Highly-saturated erbium-doped-fibre power amplifiers
It has not been generally appreciated that the erbium-doped fibre amplifier (EDFA) has both a saturation output power which increases with pump power, as well as an ability to operate deep in saturation without signal distortion and interchannel crosstalk. The latter is a consequence of its slow gain dynamics and is quite different from diode-amplifier behaviour. Most investigations of the gain characteristics of EDFAs to date have concentrated on the small input signal regime and attempted to obtain high unsaturated gain for low-pump powers, an attribute which is required for an in-line amplifier. By contrast, in this paper we discuss the application of EDFAs as power (post) amplifiers where the input signal is large and the amplifier saturation behaviour outlined above can be exploited. In the highly-saturated regime we have obtained near quantum-limited pump to signal conversion efficiencies, resulting in 55mW (17.4dBm) of amplified signal for only 100mW of pump power at 978nm. Operating in this mode EDFAs are attractive for application as power amplifiers to ease power budget restrictions in point-to-point digital links, video distribution networks and LANs.
Laming, R.I.
c86f359b-9145-4148-bc7d-ae4f3d272ca2
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
Meli, F.
073a1ea2-ca09-440d-a930-6395eb74ec80
Grasso, G.
c330b0c5-9acd-4521-8ac5-b63f2a492d9a
Tarbox, E.J.
5ba8718b-b1ea-4291-bbab-293456f66206
Laming, R.I.
c86f359b-9145-4148-bc7d-ae4f3d272ca2
Payne, D.N.
4f592b24-707f-456e-b2c6-8a6f750e296d
Meli, F.
073a1ea2-ca09-440d-a930-6395eb74ec80
Grasso, G.
c330b0c5-9acd-4521-8ac5-b63f2a492d9a
Tarbox, E.J.
5ba8718b-b1ea-4291-bbab-293456f66206

Laming, R.I., Payne, D.N., Meli, F., Grasso, G. and Tarbox, E.J. (1990) Highly-saturated erbium-doped-fibre power amplifiers. Topical Meeting on Optical Fibre Amplifiers and Their Applications, United States. 06 - 08 Aug 1990.

Record type: Conference or Workshop Item (Paper)

Abstract

It has not been generally appreciated that the erbium-doped fibre amplifier (EDFA) has both a saturation output power which increases with pump power, as well as an ability to operate deep in saturation without signal distortion and interchannel crosstalk. The latter is a consequence of its slow gain dynamics and is quite different from diode-amplifier behaviour. Most investigations of the gain characteristics of EDFAs to date have concentrated on the small input signal regime and attempted to obtain high unsaturated gain for low-pump powers, an attribute which is required for an in-line amplifier. By contrast, in this paper we discuss the application of EDFAs as power (post) amplifiers where the input signal is large and the amplifier saturation behaviour outlined above can be exploited. In the highly-saturated regime we have obtained near quantum-limited pump to signal conversion efficiencies, resulting in 55mW (17.4dBm) of amplified signal for only 100mW of pump power at 978nm. Operating in this mode EDFAs are attractive for application as power amplifiers to ease power budget restrictions in point-to-point digital links, video distribution networks and LANs.

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More information

Published date: 1990
Venue - Dates: Topical Meeting on Optical Fibre Amplifiers and Their Applications, United States, 1990-08-06 - 1990-08-08

Identifiers

Local EPrints ID: 77475
URI: https://eprints.soton.ac.uk/id/eprint/77475
PURE UUID: 1107327f-201e-4197-888d-2ec7a45feaba

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:32

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