title: Phase delay of coupled modes in single-mode optical fibers.
abstract: The phase delay of the fundamental LP(01) mode in a single-mode optical fiber is studied using periodic perturbation of the fiber axis. A large phase shift may be obtained through distortion-induced birefringence, with less than 1.5- dB coupling loss to the radiative modes.
authors.forename: H
authors.initials: H
authors.lastname: Grebel