Experiments demonstrate a dramatic decrease in polarization-instability threshold as an optical pulse is tuned near the short-wavelength edge of the photonic bandgap formed by a fiber Bragg grating. These enhanced nonlinear interactions and birefringent effects are modeled with coupled-mode numerical simulations. Nonlinearities are shown to increase much more rapidly than the effective birefringence as the pulse wavelength approaches the bandgap edge.
© 2000 Optical Society of America
R. E. Slusher, Stefan Spälter, B. J. Eggleton, Suresh Pereira, and J. E. Sipe, "Bragg-grating-enhanced polarization instabilities," Opt. Lett. 25, 749-751 (2000)