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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 18 — Sep. 15, 2012
  • pp: 3906–3908

Spectrogram approach to S2 fiber mode analysis to distinguish between dispersion and distributed scattering

J. Jasapara and A. D. Yablon  »View Author Affiliations


Optics Letters, Vol. 37, Issue 18, pp. 3906-3908 (2012)
http://dx.doi.org/10.1364/OL.37.003906


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Abstract

We report on the significant effect that intermodal dispersion can have on spatially and spectrally resolved interferometric ( S 2 ) fiber mode analysis. This dispersion can significantly broaden the measured intermodal group delay and could be misinterpreted as distributed scattering. In our new approach, the spectral interference data is analyzed over multiple wavelength windows staggered across the measurement bandwidth and assembled together to form a spectrogram that reveals the wavelength dependence of the intermodal group delay. Measurements on standard telecom single-mode and large-mode-area fibers are presented. This spectrogram analysis is a more accurate map of mode conversion along the fiber and is essential for evaluating fibers and fiber devices.

© 2012 Optical Society of America

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: July 4, 2012
Revised Manuscript: August 6, 2012
Manuscript Accepted: August 6, 2012
Published: September 14, 2012

Citation
J. Jasapara and A. D. Yablon, "Spectrogram approach to S2 fiber mode analysis to distinguish between dispersion and distributed scattering," Opt. Lett. 37, 3906-3908 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-18-3906


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References

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  2. J. W. Nicholson, A. D. Yablon, S. Ramachandran, and S. Ghalmi, Opt. Express 16, 7233 (2008). [CrossRef]
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  4. D. Schimpf, R. Barankov, and S. Ramachandran, Opt. Express 19, 13008 (2011). [CrossRef]
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  6. K. Jespersen, Z. Li, L. Nielsen, B. Palsdottir, F. Poletti, and J. Nicholson, in Optical Fiber Communication Conference, OSA Technical Digest (Optical Society of America, 2012), paper OTh3I.4.

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