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Null-frequency-shift acousto-optic tunable filter for wavelength tuning of a Tm fibre laser

Null-frequency-shift acousto-optic tunable filter for wavelength tuning of a Tm fibre laser
Null-frequency-shift acousto-optic tunable filter for wavelength tuning of a Tm fibre laser
Acousto-optic tunable filters (AOTFs) are used in many applications where fast agile tuning capabilities combined with conservation of spatial coherence are required; such as for selection of wavelength from a broadband source for applications in confocal microscopy, hyperspectral imaging and spectroscopy [1]. For generation of higher spectral intensity they can also be used inside a laser cavity in order to select the operating wavelength [2]. AOTFs utilise a travelling acoustic wave to diffract phase-matched wavelengths, with the diffracted wave frequency-shifted by the acoustic drive frequency. When used intracavity as a tuning element in a fibre laser, this continual wavelength shift on each pass through the AOTF has a number of undesirable consequences including, poor power stability and, in some situations, pulsing, which can lead to damage.
Shardlow, P.C.
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Ward, J.
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Pannell, C.
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Valle, S.
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Clarkson, W.A.
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Shardlow, P.C.
9ca17301-8ae7-4307-8bb9-371df461520c
Ward, J.
e3803cde-deb2-46d2-be24-b6bfd18c8742
Pannell, C.
23fd5a3c-cccd-482f-8bec-ebb8f02d8474
Valle, S.
9ba5d80d-a1a6-47a0-af8a-58a64e2ce299
Clarkson, W.A.
3b060f63-a303-4fa5-ad50-95f166df1ba2

Shardlow, P.C., Ward, J., Pannell, C., Valle, S. and Clarkson, W.A. (2015) Null-frequency-shift acousto-optic tunable filter for wavelength tuning of a Tm fibre laser. CLEO/Europe-EQEC 2015, Munich, Germany. 21 - 25 Jun 2015. 1 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Acousto-optic tunable filters (AOTFs) are used in many applications where fast agile tuning capabilities combined with conservation of spatial coherence are required; such as for selection of wavelength from a broadband source for applications in confocal microscopy, hyperspectral imaging and spectroscopy [1]. For generation of higher spectral intensity they can also be used inside a laser cavity in order to select the operating wavelength [2]. AOTFs utilise a travelling acoustic wave to diffract phase-matched wavelengths, with the diffracted wave frequency-shifted by the acoustic drive frequency. When used intracavity as a tuning element in a fibre laser, this continual wavelength shift on each pass through the AOTF has a number of undesirable consequences including, poor power stability and, in some situations, pulsing, which can lead to damage.

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Published date: June 2015
Venue - Dates: CLEO/Europe-EQEC 2015, Munich, Germany, 2015-06-21 - 2015-06-25
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 379465
URI: https://eprints.soton.ac.uk/id/eprint/379465
PURE UUID: eec8477f-7f28-4250-80b4-7344a3e68975
ORCID for P.C. Shardlow: ORCID iD orcid.org/0000-0003-0459-0581

Catalogue record

Date deposited: 21 Jul 2015 13:31
Last modified: 20 Nov 2018 01:30

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