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The circular-birefringence fiber (CBF) or the so-called twisted fiber provides novel attractive potential for all-optical signal-processing applications. Unlike a standard nonpolarization-maintaining (non-PM) fiber, where the polarization dependence of chi(3) nonlinearity is averaged out by the residual birefringence, the CBF behaves as a perfectly isotropic fiber in terms of nonlinear wave propagation...
We demonstrate the use of 1-m length of Bi2O3-based nonlinear fiber for implementing a 10-Gbit/s NRZ signal wavelength converter based on XPM-induced polarization rotation. No SBS suppression scheme was employed owing to a high SBS threshold of the fiber
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