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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 18 — Aug. 27, 2012
  • pp: 20494–20505

Measuring higher-order modes in a low-loss, hollow-core, photonic-bandgap fiber

J.W. Nicholson, L. Meng, J.M. Fini, R.S. Windeler, A. DeSantolo, E. Monberg, F. DiMarcello, Y. Dulashko, M. Hassan, and R. Ortiz  »View Author Affiliations

Optics Express, Vol. 20, Issue 18, pp. 20494-20505 (2012)

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We perform detailed measurements of the higher-order-mode content of a low-loss, hollow-core, photonic-bandgap fiber. Mode content is characterized using Spatially and Spectrally resolved (S2) imaging, revealing a variety of phenomena. Discrete mode scattering to core-guided modes are measured at small relative group-delays. At large group delays a continuum of surface modes and core-guided modes can be observed. The LP11 mode is observed to split into four different group delays with different orientations, with the relative orientations preserved as the mode propagates through the fiber. Cutback measurements allow for quantification of the loss of different individual modes. The behavior of the modes in the low loss region of the fiber is compared to that in a high loss region of the fiber. Finally, a new measurement technique is introduced, the sliding-window Fourier transform of high-resolution transmission spectra of hollow-core fibers, which displays the dependence of HOM content on both wavelength and group delay. This measurement is used to illustrate the HOM content as function of coil diameter.

© 2012 OSA

OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.4005) Fiber optics and optical communications : Microstructured fibers

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: May 23, 2012
Revised Manuscript: August 17, 2012
Manuscript Accepted: August 20, 2012
Published: August 22, 2012

J.W. Nicholson, L. Meng, J.M. Fini, R.S. Windeler, A. DeSantolo, E. Monberg, F. DiMarcello, Y. Dulashko, M. Hassan, and R. Ortiz, "Measuring higher-order modes in a low-loss, hollow-core, photonic-bandgap fiber," Opt. Express 20, 20494-20505 (2012)

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  1. D. Ouzounov, C. Hensley, A. Gaeta, N. Venkateraman, M. Gallagher, and K. Koch, “Soliton pulse compression in photonic band-gap fibers,” Opt. Express13(16), 6153–6159 (2005). [CrossRef] [PubMed]
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  12. J. M. Fini and J. W. Nicholson, “Bend-induced changes in group delay and comparison with S^2 mode-content measurements,” CLEO 2009 paper CWD5.

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