Paper
21 April 2008 Spectral-domain measurement of phase modal birefringence in highly birefringent fibers
Petr Hlubina, Dalibor Ciprian, Jana Trojková
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Abstract
We present a new method for measuring the wavelength dependence of phase modal birefringence in highly birefringent fibers. The method is based on application of a lateral pointlike force on the fiber and resolution of the spectral interference fringes. The displacement of the lateral force needed for one-period phase change of the spectral fringes at given wavelength is used to determine the beat length or the phase modal birefringence. In this paper, the new method is analyzed theoretically and experimentally. First, we model the spectral interferograms for two different locations of the lateral force with respect to the fiber end and show how the wavelength dependence of the phase modal birefringence can be retrieved from the interferograms. Second, we measure the wavelength dependence of phase modal birefringence in two different highly birefringent fibers and compare it with that resulting from the measurement of the wavelength dependence of group modal birefringence.
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Petr Hlubina, Dalibor Ciprian, and Jana Trojková "Spectral-domain measurement of phase modal birefringence in highly birefringent fibers", Proc. SPIE 6990, Photonic Crystal Fibers II, 69900U (21 April 2008); https://doi.org/10.1117/12.778446
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KEYWORDS
Birefringence

Optical fibers

Phase measurement

Polarization

Interferometry

Spectroscopy

Spectral resolution

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