Scanning the wavelength in high-birefringence fibers inherently measures the group delay difference, and not the phase delay difference, between the two polarization modes. Dispersion of the birefringence will result in a 10-20% error in fiber beat lengths interpolated from such measurements, even if only stress birefringence is present. Geometrical dispersion can introduce even larger errors in some fibers.
CITATION STYLE
Rashleigh, S. C. (1983). Measurement of fiber birefringence by wavelength scanning: effect of dispersion. Optics Letters, 8(6), 336. https://doi.org/10.1364/ol.8.000336
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