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Proceedings Paper

Efficient erbium-doped fiber amplifiers incorporating an optical isolator
Author(s): Michalis N. Zervas; Richard Ian Laming; David N. Payne
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Paper Abstract

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. Finally, a high-gain composite EDFA has been experimentally demonstrated which exhibits a gain of 51 dB and NF of 3.1 dB for only 45 mW of pump power.

Paper Details

Date Published: 23 March 1993
PDF: 10 pages
Proc. SPIE 1789, Fiber Laser Sources and Amplifiers IV, (23 March 1993); doi: 10.1117/12.141124
Show Author Affiliations
Michalis N. Zervas, Univ. of Southampton (United Kingdom)
Richard Ian Laming, Univ. of Southampton (United Kingdom)
David N. Payne, Univ. of Southampton (United Kingdom)

Published in SPIE Proceedings Vol. 1789:
Fiber Laser Sources and Amplifiers IV
Michel J. F. Digonnet; Elias Snitzer, Editor(s)

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