A simple frequency-domain technique for measuring polarization-mode dispersion in single-mode fibers with random mode coupling is used to give what is to my knowledge the first direct experimental demonstration of the transition of the dispersion from a linear length dependence to a square-root-of-length dependence. Sensitivity to external perturbations is demonstrated by an order-of-magnitude increase in dispersion when the fiber is removed from a conventional spool and placed on a large-diameter drum. An expression for the length-dependent probability density function that describes the dispersion for highly coherent sources is also presented and confirmed experimentally.
© 1989 Optical Society of America
Original Manuscript: November 3, 1988
Manuscript Accepted: February 24, 1989
Published: May 15, 1989
C. D. Poole, "Measurement of polarization-mode dispersion in single-mode fibers with random mode coupling," Opt. Lett. 14, 523-525 (1989)