Abstract

Methods for high repetition-rate pulse-train generation based on nonlinear propagation of an optical signal along an optical fiber ate an alternative technique to the traditional sources of short optical pulses-namely, mode-looked lasers. The induced modulation instability (IMI) effect has been suggested as a technique for the generation of high repetition-rate pulse train, addition, it has been theoretically shown³ that a train of femtosecond fundamental soliton pulses can be generated utilizing a combination of IMI and Raman self-scattering (RSS) effects. An alternative technique^4–6 is based on the adiabatic transformation of a dual-frequency beat-signal into a train of solitons as a result of nonlinear propagation in an optical fiber with dispersion decreasing along its length (DDF).

© 1993 Optical Society of America