title: Measurement of spatial distribution of mode coupling in birefringent polarization-maintaining fiber with new detection scheme.
abstract: We present a new detection scheme for measuring the spatial distribution of mode coupling in birefringent, polarization-maintaining fibers. The new method canl improve the signal-to-noise ratio by a factor of 100 compared with the previously reported heterodyne-detection scheme. As a result, origin of the mode coupling in a low-cross-talk, birefringent fiber is clarified.
authors.forename: K
authors.initials: K
authors.lastname: Takada
authors.forename: J
authors.initials: J
authors.lastname: Noda
authors.forename: K
authors.initials: K
authors.lastname: Okamoto