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Spatial dopant profiles for transverse-mode selection in multi-mode waveguides

Spatial dopant profiles for transverse-mode selection in multi-mode waveguides
Spatial dopant profiles for transverse-mode selection in multi-mode waveguides
We theoretically investigated the effect of the spatial distribution of the active-ion concentration in multimode step-index waveguides on transverse-mode selection for continuous-wave laser operation. We found that uniform doping of a central portion of as much as 60% of the full waveguide core width is highly effective for the selection of fundamental-mode operation, even under highly saturated, high-power conditions. Profiling the dopant distribution to match that of the particular mode desired was also found to be effective, especially if it is the saturated inversion profile that is matched to the shape of the mode.
guided waves, laser theory, lasers
0740-3224
1539-1543
Bhutta, Tajamal
dfc5c436-4498-41f3-8590-0c1a6ac7e59f
Mackenzie, Jacob I.
1d82c826-fdbf-425b-ac04-be43ccf12008
Shepherd, David P.
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Beach, Raymond J.
07ed0cdd-1d3a-4da0-bbf0-b4bb1ee821c3
Bhutta, Tajamal
dfc5c436-4498-41f3-8590-0c1a6ac7e59f
Mackenzie, Jacob I.
1d82c826-fdbf-425b-ac04-be43ccf12008
Shepherd, David P.
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Beach, Raymond J.
07ed0cdd-1d3a-4da0-bbf0-b4bb1ee821c3

Bhutta, Tajamal, Mackenzie, Jacob I., Shepherd, David P. and Beach, Raymond J. (2002) Spatial dopant profiles for transverse-mode selection in multi-mode waveguides. Journal of the Optical Society of America B, 19 (7), 1539-1543. (doi:10.1364/JOSAB.19.001539).

Record type: Article

Abstract

We theoretically investigated the effect of the spatial distribution of the active-ion concentration in multimode step-index waveguides on transverse-mode selection for continuous-wave laser operation. We found that uniform doping of a central portion of as much as 60% of the full waveguide core width is highly effective for the selection of fundamental-mode operation, even under highly saturated, high-power conditions. Profiling the dopant distribution to match that of the particular mode desired was also found to be effective, especially if it is the saturated inversion profile that is matched to the shape of the mode.

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Published date: July 2002
Keywords: guided waves, laser theory, lasers

Identifiers

Local EPrints ID: 13800
URI: https://eprints.soton.ac.uk/id/eprint/13800
ISSN: 0740-3224
PURE UUID: b236eb6f-bf46-4b0a-905d-75e1e84ad88b
ORCID for Jacob I. Mackenzie: ORCID iD orcid.org/0000-0002-3355-6051
ORCID for David P. Shepherd: ORCID iD orcid.org/0000-0002-4561-8184

Catalogue record

Date deposited: 31 Dec 2004
Last modified: 03 Dec 2019 02:05

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Contributors

Author: Tajamal Bhutta
Author: David P. Shepherd ORCID iD
Author: Raymond J. Beach

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