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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 14 — Jul. 4, 2011
  • pp: 13008–13019

Cross-correlated (C2) imaging of fiber and waveguide modes

D. N. Schimpf, R. A. Barankov, and S. Ramachandran  »View Author Affiliations


Optics Express, Vol. 19, Issue 14, pp. 13008-13019 (2011)
http://dx.doi.org/10.1364/OE.19.013008


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Abstract

We demonstrate a method that enables reconstruction of waveguide or fiber modes without assuming any optical properties of the test waveguide. The optical low-coherence interferometric technique accounts for the impact of dispersion on the cross-correlation signal. This approach reveals modal content even at small intermodal delays, thus providing a universally applicable method for determining the modal weights, profiles, relative group-delays and dispersion of all guided or quasi-guided (leaky) modes. Our current implementation allows us to measure delays on a femtosecond time-scale, mode discrimination down to about – 30 dB, and dispersion values as high as 500 ps/nm/km. We expect this technique to be especially useful in testing fundamental mode operation of multi-mode structures, prevalent in high-power fiber lasers.

© 2011 OSA

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: May 3, 2011
Revised Manuscript: June 4, 2011
Manuscript Accepted: June 4, 2011
Published: June 21, 2011

Citation
D. N. Schimpf, R. A. Barankov, and S. Ramachandran, "Cross-correlated (C2) imaging of fiber and waveguide modes," Opt. Express 19, 13008-13019 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-14-13008


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References

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