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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 36, Iss. 23 — Dec. 1, 2011
  • pp: 4578–4580

Signal beating elimination using single-mode fiber to multimode fiber coupling

Mable P. Fok, Yanhua Deng, Konstantin Kravtsov, and Paul R. Prucnal  »View Author Affiliations


Optics Letters, Vol. 36, Issue 23, pp. 4578-4580 (2011)
http://dx.doi.org/10.1364/OL.36.004578


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Abstract

We experimentally demonstrate an all-passive fiber-based approach to prevent undesired beating during signal merging and detection. Beating occurs when optical signals of very close or the same wavelength are combined at a coupler and detected using a photodetector. Our approach is based on signal coupling from several single-mode fibers to a single piece of multimode fiber without interference, such that different signals propagate in different modes with different spatial positions inside the multimode fiber. We have investigated signal beating when the signals are coherent, partially coherent, or incoherent with each other. The measured results for single-mode to multimode coupling show signal beating is substantially reduced, resulting in widely opened eye diagrams and error-free bit error rate performance.

© 2011 Optical Society of America

OCIS Codes
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2340) Fiber optics and optical communications : Fiber optics components
(250.4745) Optoelectronics : Optical processing devices

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: September 27, 2011
Revised Manuscript: October 20, 2011
Manuscript Accepted: October 21, 2011
Published: November 25, 2011

Citation
Mable P. Fok, Yanhua Deng, Konstantin Kravtsov, and Paul R. Prucnal, "Signal beating elimination using single-mode fiber to multimode fiber coupling," Opt. Lett. 36, 4578-4580 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-23-4578


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