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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 36, Iss. 23 — Dec. 1, 2011
  • pp: 4503–4505

Analysis of broad emission direction in a spiral-shaped microcavity laser

Myung-Woon Kim, Kyu-Won Park, Chang-Hwan Yi, and Chil-Min Kim  »View Author Affiliations


Optics Letters, Vol. 36, Issue 23, pp. 4503-4505 (2011)
http://dx.doi.org/10.1364/OL.36.004503


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Abstract

Broad emission direction with two lobes is analyzed in a spiral-shaped microcavity laser. By pumping the boundary of the InGaAsP semiconductor laser with dc current injection, whispering-gallery-type modes emitting through a notch are obtained. By classifying the lasing modes into mode groups based on the equidistant mode spacing, it is shown that each mode group has its own emission direction with a narrow divergence angle and that a superposition of emission direction of dominant mode groups reproduces a far-field pattern of total intensity with two lobes, which is contrary to theoretical results.

© 2011 Optical Society of America

OCIS Codes
(140.3410) Lasers and laser optics : Laser resonators
(140.5960) Lasers and laser optics : Semiconductor lasers
(140.3945) Lasers and laser optics : Microcavities

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: September 9, 2011
Revised Manuscript: October 15, 2011
Manuscript Accepted: October 15, 2011
Published: November 22, 2011

Citation
Myung-Woon Kim, Kyu-Won Park, Chang-Hwan Yi, and Chil-Min Kim, "Analysis of broad emission direction in a spiral-shaped microcavity laser," Opt. Lett. 36, 4503-4505 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-23-4503


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