A necessary condition to guarantee the existence of the principal state of polarization is experimentally examined. The <i>P</i> parameter, which is defined as the product of the differential group delay and the bandwidth of the principal state of polarization, is measured. The <i>P</i> parameter of long single-mode fibers is assessed. Average <i>P</i> values of 0.26 for dispersion-shifted fiber and 0.45 for conventional single-mode fiber were obtained. Combining these results with published results, one finds that <i>P</i> is not determined solely from the state of the polarization-mode coupling.
© 1998 Optical Society of America
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(260.5430) Physical optics : Polarization
Osamu Aso, "Measurement of a parameter limiting the analysis of the first-order polarization-mode dispersion ef fect," Opt. Lett. 23, 1102-1104 (1998)