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Direct observation of Kramers-Kronig self-phasing in coherently combined fiber lasers

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.
0146-9592
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
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), 4104-4107. (doi:10.1364/OL.38.004104).

Record type: Article

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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More information

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: https://eprints.soton.ac.uk/id/eprint/378477
ISSN: 0146-9592
PURE UUID: cf7570f3-b4d6-44ca-98de-35a5a1bea505
ORCID for Johan Nilsson: ORCID iD orcid.org/0000-0003-1691-7959

Catalogue record

Date deposited: 29 Jun 2015 10:54
Last modified: 20 Jul 2019 01:11

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Contributors

Author: Hung-Sheng Chiang
Author: James R. Leger
Author: Johan Nilsson ORCID iD
Author: Jayanta Sahu

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