Abstract

Polarization coupling is demonstrated in a 0.1-m-long length of nitrobenzene-cored weakly birefringent single-mode optical fiber. Self-switching of the launched mode to the orthogonal polarization is observed at peak powers as low as 1 W A total phase shift of at least 12π was induced at a launched peak power of approximately 10 W To our knowledge, this is the largest phase shift observed experimentally in any nonlinear waveguide at such a low power. The low transmission loss of nitrobenzene makes the device highly attractive for a variety of nonlinear switching applications.

© 1992 Optical Society of America

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