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Journal of Lightwave Technology

Journal of Lightwave Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 30, Iss. 10 — May. 15, 2012
  • pp: 1499–1508

Distributed Mode Coupling Measurement Along Tapered Single-Mode Fibers With Optical Frequency-Domain Reflectometry

Xiaozhen Wang, Wenhai Li, Liang Chen, and Xiaoyi Bao

Journal of Lightwave Technology, Vol. 30, Issue 10, pp. 1499-1508 (2012)


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Abstract

We present the measurement of distributed mode coupling along tapered single-mode fibers using optical frequency-domain reflectometry. The energy re-distribution through Rayleigh backscatter amplitude as a function of distance with a 13 μm resolution over the whole taper region is measured. The wavelength shifts between the fundamental mode and high order modes of the taper are theoretically derived and experimentally verified by using autocorrelation data processing. An accurate measurement of refractive index differences in both gentle and abrupt tapers is achieved with a spatial resolution of ~2 cm. The measured results and theoretical values match well in gentle taper. It is found that the physical length of mode coupling of abrupt taper is longer than its geometric length, while both lengths are the same in gentle taper. The measurement is rapid, repeatable and nondestructive.

© 2012 IEEE

Citation
Xiaozhen Wang, Wenhai Li, Liang Chen, and Xiaoyi Bao, "Distributed Mode Coupling Measurement Along Tapered Single-Mode Fibers With Optical Frequency-Domain Reflectometry," J. Lightwave Technol. 30, 1499-1508 (2012)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-30-10-1499

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