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Bragg-grating-stabilized external cavity lasers for gas sensing using tunable diode laser spectroscopy

Bragg-grating-stabilized external cavity lasers for gas sensing using tunable diode laser spectroscopy
Bragg-grating-stabilized external cavity lasers for gas sensing using tunable diode laser spectroscopy
Conventional singlemode semiconductor DFB and VCSEL lasers used in high resolution spectroscopy are often required to operate at specific, custom wavelengths, such as those associated with gas absorption lines. We present the results of work to develop alternative sources in the 1550nm and 1650nm regions, the latter coinciding with an absorption line of methane. Custom wavelength Bragg gratings have been used to stabilize the output of external cavity lasers implemented in both optical fiber and planar silica-on-silicon integrated circuits, using commercially available semiconductor gain chips, to give laser output at 1648 and 1649 nm, respectively. Thermal expansion or mechanical strain of the Bragg grating offers a suitable wavelength tuning mechanism. Results are presented including the wavelength tuning range, output power, relative intensity noise (RIN), side-mode suppression and linewidth of devices for application in high resolution gas spectroscopy. The different methods of writing Bragg gratings in optical fiber and planar silica-on-silicon allow a high degree of flexibility in the choice of emission wavelength.
Lynch, S.G.
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Chen, F.
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Gates, J.C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Holmes, C.
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Staines, S.E.
e3535e75-567d-4252-a501-43884b157d79
James, S.W.
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Hodgkinson, J.
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Smith, P.G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Tatam, R.P.
e2a442ec-225f-4373-8c2b-bcef387026ff
Lynch, S.G.
cb5a2801-5325-4b19-b0b7-2ee8657db30f
Chen, F.
52094605-7f42-4242-aa69-fde77aaaa7c3
Gates, J.C.
b71e31a1-8caa-477e-8556-b64f6cae0dc2
Holmes, C.
16306bb8-8a46-4fd7-bb19-a146758e5263
Staines, S.E.
e3535e75-567d-4252-a501-43884b157d79
James, S.W.
02f53f34-3244-4898-90df-246ca2b466db
Hodgkinson, J.
38d85a3c-c8cc-4e72-b066-f884633576c6
Smith, P.G.R.
8979668a-8b7a-4838-9a74-1a7cfc6665f6
Tatam, R.P.
e2a442ec-225f-4373-8c2b-bcef387026ff

Lynch, S.G., Chen, F., Gates, J.C., Holmes, C., Staines, S.E., James, S.W., Hodgkinson, J., Smith, P.G.R. and Tatam, R.P. (2014) Bragg-grating-stabilized external cavity lasers for gas sensing using tunable diode laser spectroscopy. SPIE Conference on Novel In-Plane Semiconductor Lasers XIII, San Francisco, United States. 03 - 06 Feb 2014.

Record type: Conference or Workshop Item (Paper)

Abstract

Conventional singlemode semiconductor DFB and VCSEL lasers used in high resolution spectroscopy are often required to operate at specific, custom wavelengths, such as those associated with gas absorption lines. We present the results of work to develop alternative sources in the 1550nm and 1650nm regions, the latter coinciding with an absorption line of methane. Custom wavelength Bragg gratings have been used to stabilize the output of external cavity lasers implemented in both optical fiber and planar silica-on-silicon integrated circuits, using commercially available semiconductor gain chips, to give laser output at 1648 and 1649 nm, respectively. Thermal expansion or mechanical strain of the Bragg grating offers a suitable wavelength tuning mechanism. Results are presented including the wavelength tuning range, output power, relative intensity noise (RIN), side-mode suppression and linewidth of devices for application in high resolution gas spectroscopy. The different methods of writing Bragg gratings in optical fiber and planar silica-on-silicon allow a high degree of flexibility in the choice of emission wavelength.

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More information

Published date: February 2014
Venue - Dates: SPIE Conference on Novel In-Plane Semiconductor Lasers XIII, San Francisco, United States, 2014-02-03 - 2014-02-06
Organisations: Optoelectronics Research Centre, Electronics & Computer Science, Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 379380
URI: https://eprints.soton.ac.uk/id/eprint/379380
PURE UUID: 04266c44-91d4-49a9-9683-062d5c34aafc
ORCID for J.C. Gates: ORCID iD orcid.org/0000-0001-8671-5987

Catalogue record

Date deposited: 21 Jul 2015 13:12
Last modified: 20 Jul 2019 01:06

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Contributors

Author: S.G. Lynch
Author: F. Chen
Author: J.C. Gates ORCID iD
Author: C. Holmes
Author: S.E. Staines
Author: S.W. James
Author: J. Hodgkinson
Author: P.G.R. Smith
Author: R.P. Tatam

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