Modulational instability in doped glass fibers is analyzed theoretically in a steady-state regime, taking into account a saturable nonlinearity. The results have shown that the critical modulation frequency and modulation gain increase with input power, reaching a maximum value at the saturation power. This leads to a unique value of the critical modulation frequency for two different input powers so that two solutions will experience a maximum gain at the same frequency.
© 1993 Optical Society of America
Original Manuscript: August 13, 1992
Published: February 1, 1993
J. Miguel Hickmann, S. B. Cavalcanti, N. M. Borges, E. A. Gouveia, and A. S. Gouveia-Neto, "Modulational instability in semiconductor-doped glass fibers with saturable nonlinearity," Opt. Lett. 18, 182-184 (1993)