We describe direct observation of a geometrical phase in a noncyclic case as the rotation of the plane of polarization of a linearly polarized beam of light. The beam travels down uniformly wound half-turn single-mode optical fibers with various pitch angles.
© 1991 Optical Society of America
O.J. Kwon, H. T. Lee, S. B. Lee, and S. S. Choi, "Observation of a topological phase in a noncyclic case by use of a half-sturn optical fiber," Opt. Lett. 16, 223-225 (1991)