Direct observation of Kramers-Kronig self-phasing in coherently combined fiber lasers
Direct observation of Kramers-Kronig self-phasing in coherently combined fiber lasers
A highly stable coherent beam-combining system has been designed to measure self-phasing in fiber lasers due to nonlinear effects. Whereas self-phasing in previous coherent combination experiments has been principally attributed to wavelength shifting, these wavelength effects have been efficiently suppressed in our experiment by using a dual-core fiber with closely balanced optical path lengths. The self-phasing from nonlinear effects could then be measured independently and directly by common-path interferometry with a probe laser. The Kramers-Kronig effect in the fiber gain media was observed to induce a phase shift that effectively canceled the applied path length errors, resulting in efficient lasing under all phase conditions. This process was demonstrated to result in robust lasing over a large range of pump conditions.
4104-4107
Chiang, Hung-Sheng
27fef11c-4224-4973-9367-b64bf314b21c
Leger, James R.
7afbc5c6-2518-49bf-8b03-1a2456ebe2d8
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
15 October 2013
Chiang, Hung-Sheng
27fef11c-4224-4973-9367-b64bf314b21c
Leger, James R.
7afbc5c6-2518-49bf-8b03-1a2456ebe2d8
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Sahu, Jayanta
009f5fb3-6555-411a-9a0c-9a1b5a29ceb2
Chiang, Hung-Sheng, Leger, James R., Nilsson, Johan and Sahu, Jayanta
(2013)
Direct observation of Kramers-Kronig self-phasing in coherently combined fiber lasers.
Optics Letters, 38 (20), .
(doi:10.1364/OL.38.004104).
Abstract
A highly stable coherent beam-combining system has been designed to measure self-phasing in fiber lasers due to nonlinear effects. Whereas self-phasing in previous coherent combination experiments has been principally attributed to wavelength shifting, these wavelength effects have been efficiently suppressed in our experiment by using a dual-core fiber with closely balanced optical path lengths. The self-phasing from nonlinear effects could then be measured independently and directly by common-path interferometry with a probe laser. The Kramers-Kronig effect in the fiber gain media was observed to induce a phase shift that effectively canceled the applied path length errors, resulting in efficient lasing under all phase conditions. This process was demonstrated to result in robust lasing over a large range of pump conditions.
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Accepted/In Press date: 11 September 2013
e-pub ahead of print date: 9 October 2013
Published date: 15 October 2013
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 378477
URI: http://eprints.soton.ac.uk/id/eprint/378477
ISSN: 0146-9592
PURE UUID: cf7570f3-b4d6-44ca-98de-35a5a1bea505
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Date deposited: 29 Jun 2015 10:54
Last modified: 15 Mar 2024 03:09
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Contributors
Author:
Hung-Sheng Chiang
Author:
James R. Leger
Author:
Johan Nilsson
Author:
Jayanta Sahu
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