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Advanced erbium-doped fibre devices

Advanced erbium-doped fibre devices
Advanced erbium-doped fibre devices
Erbium-doped fibre devices, such as lasers and amplifiers, are important components in optical communication systems at 1.5µm. In this thesis four advanced erbium-doped fibre devices to help meet the needs of future systems are described. The first device, an optical limiting amplifier, provides a constant output power for a wide range of input powers. This functionality is required in long-haul amplified links and networks to protect against signal power fade.

The other three devices are constructed from erbium-doped twincore fibre which exhibits inhomogeneous saturation characteristics at room temperature, conventional erbium-doped fibre only exhibits this property at cryogenic temperatures. The twincore fibre is demonstrated to particularly suit multi-channel amplification and generation and is used to construct a multiple wavelength laser and channel equalising amplifier. Both of these devices are needed for future wavelength division multiplexing (WDM) systems and are difficult to construct from conventional erbium-doped fibre because of its homogeneous saturation characteristics.

Finally, a tracking bandpass filter is constructed from a single piece of unpumped twincore fibre. The filter automatically tunes to the wavelength of the optical signal and has potential for guiding solitons in ultralong communication links.
Graydon, Oliver
ff940b46-5af7-4b62-9908-7ba1716130ff
Graydon, Oliver
ff940b46-5af7-4b62-9908-7ba1716130ff
Laming, R.I.
c86f359b-9145-4148-bc7d-ae4f3d272ca2

Graydon, Oliver (1996) Advanced erbium-doped fibre devices. University of Southampton, Optoelectronics Research Centre, Doctoral Thesis, 162pp.

Record type: Thesis (Doctoral)

Abstract

Erbium-doped fibre devices, such as lasers and amplifiers, are important components in optical communication systems at 1.5µm. In this thesis four advanced erbium-doped fibre devices to help meet the needs of future systems are described. The first device, an optical limiting amplifier, provides a constant output power for a wide range of input powers. This functionality is required in long-haul amplified links and networks to protect against signal power fade.

The other three devices are constructed from erbium-doped twincore fibre which exhibits inhomogeneous saturation characteristics at room temperature, conventional erbium-doped fibre only exhibits this property at cryogenic temperatures. The twincore fibre is demonstrated to particularly suit multi-channel amplification and generation and is used to construct a multiple wavelength laser and channel equalising amplifier. Both of these devices are needed for future wavelength division multiplexing (WDM) systems and are difficult to construct from conventional erbium-doped fibre because of its homogeneous saturation characteristics.

Finally, a tracking bandpass filter is constructed from a single piece of unpumped twincore fibre. The filter automatically tunes to the wavelength of the optical signal and has potential for guiding solitons in ultralong communication links.

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Published date: February 1996
Organisations: University of Southampton

Identifiers

Local EPrints ID: 396447
URI: https://eprints.soton.ac.uk/id/eprint/396447
PURE UUID: 4a29f424-b996-46d2-b128-0b64775cd519

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Date deposited: 28 Jun 2016 17:16
Last modified: 17 Jul 2017 18:49

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Contributors

Author: Oliver Graydon
Thesis advisor: R.I. Laming

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