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Narrow-linewidth erbium-doped fibre lasers

Narrow-linewidth erbium-doped fibre lasers
Narrow-linewidth erbium-doped fibre lasers
This thesis describes research towards narrow-linewidth and single-longitudinal-mode erbium-doped fibre lasers operating on the 1.55µm region. The work is concerned with the physics and technology of narrow-linewidth fibre lasers. Factors which affect the spectral width and number of modes oscillating in an erbium-doped fibre laser are described, with particular reference to spatial holeburning, the primary cause of multi-mode oscillation.
Novel resonator configurations for narrow-linewidth operation are described, in both standing-wave and travelling-wave arrangements, with linewidths as narrow as 10Hz being achieved. The development of narrow-bandwidth distributed Bragg reflectors is discussed.
Resonator configurations discussed include short fibre lasers with narrow bandwidth reflectors, polarimetric coupled-cavity fibre lasers, travelling-wave fibre ring lasers and travelling-wave fibre loop lasers. Travelling-wave operation is demonstrated to be a powerful technique for realising single-frequency fibre laser operation. Linewidths as narrow as 10kHz are demonstrated in long fibre laser resonators. The potential for high efficiency and broad tuning ranges are illustrated.
The statistics of phase noise in erbium-doped fibre amplifiers are characterised, by measurements of spectral broadening of a signal passing through the amplifier. The process of spectral broadening is modelled using a rotating vector approach. The implications for amplification of narrow bandwidth signals are discussed.
University of Southampton
Cowle, Gregory John
9b41c0dd-e1ec-4854-a483-c6008438538c
Cowle, Gregory John
9b41c0dd-e1ec-4854-a483-c6008438538c
Payne, David
4f592b24-707f-456e-b2c6-8a6f750e296d

Cowle, Gregory John (1991) Narrow-linewidth erbium-doped fibre lasers. University of Southampton, Faculty of Engineering and Applied Science, Doctoral Thesis, 202pp.

Record type: Thesis (Doctoral)

Abstract

This thesis describes research towards narrow-linewidth and single-longitudinal-mode erbium-doped fibre lasers operating on the 1.55µm region. The work is concerned with the physics and technology of narrow-linewidth fibre lasers. Factors which affect the spectral width and number of modes oscillating in an erbium-doped fibre laser are described, with particular reference to spatial holeburning, the primary cause of multi-mode oscillation.
Novel resonator configurations for narrow-linewidth operation are described, in both standing-wave and travelling-wave arrangements, with linewidths as narrow as 10Hz being achieved. The development of narrow-bandwidth distributed Bragg reflectors is discussed.
Resonator configurations discussed include short fibre lasers with narrow bandwidth reflectors, polarimetric coupled-cavity fibre lasers, travelling-wave fibre ring lasers and travelling-wave fibre loop lasers. Travelling-wave operation is demonstrated to be a powerful technique for realising single-frequency fibre laser operation. Linewidths as narrow as 10kHz are demonstrated in long fibre laser resonators. The potential for high efficiency and broad tuning ranges are illustrated.
The statistics of phase noise in erbium-doped fibre amplifiers are characterised, by measurements of spectral broadening of a signal passing through the amplifier. The process of spectral broadening is modelled using a rotating vector approach. The implications for amplification of narrow bandwidth signals are discussed.

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More information

Published date: October 1991
Organisations: University of Southampton

Identifiers

Local EPrints ID: 399361
URI: http://eprints.soton.ac.uk/id/eprint/399361
PURE UUID: 7cc4d277-34e8-4fd1-bda9-3dbb8b3a1db2

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Date deposited: 16 Sep 2016 15:54
Last modified: 11 Dec 2021 11:26

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Contributors

Author: Gregory John Cowle
Thesis advisor: David Payne

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