Active fibres and optical amplifiers

Payne, D.N. (1992) Active fibres and optical amplifiers In Advances in Fibre-Optics Technology in Communication and for Guidance and Control. North Atlantic Treaty Organisation., 5.1-5.26.


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The incorporation of rare-earth ions into glass fibres to form fibre lasers and amplifiers is not a recent development. In fact the first glass laser ever demonstrated [1] was flash-pumped in the form of an optical fibre, a configuration that was used to overcome the difficulties of obtaining high-quality glass in bulk form. Apart from a report [2] in 1974 of laser operation in an Nd3+-doped silica multimode fibre, the idea of guided-wave glass lasers attracted little attention for the next 24 years. The idea resurfaced [3] in 1985 because both optical fibre and laser-diode technologies had advanced to a stage where low-loss, rare-earth-doped, single-mode fibres could be made and high-power semiconductor sources were available to pump them. In addition, low-cost fibre components (couplers, polarizers, filters) were available, which allowed construction of complex, all-fibre ring and Fabry-Perot resonators [4] to form a unique and powerful new fibre-laser technology. Even so, it was only the announcement in 1987 of a high-gain, erbium-doped fibre amplifier (EDFA) [5] operating in the third telecommunications wavelength-window at 1.54µm that sparked widespread interest in rare-earth-doped fibres in the optical telecommunications community. From that moment, frenzied worldwide activity has brought numerous new fibre amplifier developments and in 1990 resulted in several commercial products appearing, a time-lag of only three years after the first research announcement.

Item Type: Conference or Workshop Item (Paper)
ISBNs: 9283506731 (print)
Venue - Dates: AGARD EPP/GCP Advances in Fibre-Optics Technology in Communication and for Guidance and Control NATO Series of Lectures, Italy, 1992-05-16 - 1992-05-28
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ePrint ID: 77356
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Date Deposited: 11 Mar 2010
Last Modified: 18 Apr 2017 20:31
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