Article,

Polarization optics of twisted single-mode fibers

, and .
Appl. Opt., 18 (13): 2241--2251 (July 1979)
DOI: 10.1364/AO.18.002241

Abstract

In twisted single-mode optical fibers the polarization of light is affected by an elastooptically induced optical activity and by a modification of any linear birefringence present. These effects are discussed theoretically and demonstrated experimentally. The activity/twist ratio is $\alpha$/$\tau$ $\simeq$0.13 ... 0.16 universally in weakly guiding silica fibers. Twisted fibers may be used as polarization rotators. A fiber with a ±68° double twist operates as a fast/slow mode interchanger, suitable for delay equalization.

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