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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 20 — Oct. 15, 2013
  • pp: 4104–4107

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

Hung-Sheng Chiang, James R. Leger, Johan Nilsson, and Jayanta Sahu  »View Author Affiliations


Optics Letters, Vol. 38, Issue 20, pp. 4104-4107 (2013)
http://dx.doi.org/10.1364/OL.38.004104


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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.

© 2013 Optical Society of America

OCIS Codes
(140.3290) Lasers and laser optics : Laser arrays
(140.3410) Lasers and laser optics : Laser resonators
(140.3510) Lasers and laser optics : Lasers, fiber
(140.3298) Lasers and laser optics : Laser beam combining

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 15, 2013
Revised Manuscript: September 3, 2013
Manuscript Accepted: September 11, 2013
Published: October 9, 2013

Citation
Hung-Sheng Chiang, James R. Leger, Johan Nilsson, and Jayanta Sahu, "Direct observation of Kramers–Kronig self-phasing in coherently combined fiber lasers," Opt. Lett. 38, 4104-4107 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-20-4104

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