When two optical incoherent beams copropagate in an optical fiber, the intensity-dependent refractive index couples the two beams through a nonlinear process known as cross-phase modulation. We show, for the first time to our knowledge, experimental evidence on cross-phase-modulation-induced correlation time reduction and a concomitant growth of the frequency components of the two copropagating incoherent waves in a singlemode optical fiber. Theoretical analysis agrees well with experimental data.
© 1992 Optical Society of America
J. Miguel Hickmann, Heber R. da Cruz, and A. S. Gouveia-Neto, "Cross-phase modulation of incoherent light in single-mode optical fibers," Opt. Lett. 17, 478-480 (1992)