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. AGARD EPP/GCP Advances in Fibre-Optics Technology in Communication and for Guidance and Control NATO Series of Lectures Brussels, BE, North Atlantic Treaty Organisation, 5.1-5.26. (Advisory Group for Aerospace Research and Development Lecture Series 184).
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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  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  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  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  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)  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:||Book Section|
|Subjects:||Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
|Divisions:||University Structure - Pre August 2011 > Optoelectronics Research Centre
|Date Deposited:||11 Mar 2010|
|Last Modified:||19 Aug 2015 19:47|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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