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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 9 — May. 1, 2013
  • pp: 1527–1529

Directional single-mode emission from coupled whispering gallery resonators realized by using ZnS microbelts

Hai Zhu, Siu Fung Yu, Qi Jie Wang, Chong Xin Shan, and S. C. Su  »View Author Affiliations


Optics Letters, Vol. 38, Issue 9, pp. 1527-1529 (2013)
http://dx.doi.org/10.1364/OL.38.001527


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Abstract

Ring microcavities were formed by wrapping ZnS microbelts, which act as the waveguide and gain region of the microcavities on the surface of optical fibers. The ring microcavities with the formation of whispering gallery modes have lasing threshold lower (Q-factor higher) than that of the ZnS microbelts. The excitation of TM modes could also be suppressed by the ring geometries of ZnS microbelts. Furthermore, directional single-mode lasing was realized from a coupled asymmetric ring microcavity. The Vernier coupling effect and deformed geometry of the asymmetric ring microcavity were contributed to the stable single-mode operation and directional emission, respectively.

© 2013 Optical Society of America

OCIS Codes
(140.3410) Lasers and laser optics : Laser resonators
(140.7240) Lasers and laser optics : UV, EUV, and X-ray lasers
(230.4910) Optical devices : Oscillators

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: January 28, 2013
Revised Manuscript: March 12, 2013
Manuscript Accepted: March 22, 2013
Published: April 29, 2013

Citation
Hai Zhu, Siu Fung Yu, Qi Jie Wang, Chong Xin Shan, and S. C. Su, "Directional single-mode emission from coupled whispering gallery resonators realized by using ZnS microbelts," Opt. Lett. 38, 1527-1529 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-9-1527


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