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
Original Manuscript: October 2, 1991
Published: March 15, 1992
R. Kashyap and N. Finlayson, "Nonlinear polarization coupling and instabilities in single-mode liquid-cored optical fibers," Opt. Lett. 17, 405-407 (1992)