Abstract
Laser light containing two frequencies has recently been used for generating high repetition-rate periodic trains of soliton pulses in fibers in the negative groupvelocity dispersion (GVD) regime.1 It has also been proposed for use with negative GVD in long-distance, high-bit-rate nonlinear data transmissions.2 Here we investigate experimentally and numerically the nonlinear propagation of dual-frequency laser light in the positive group-velocity dispersion regime of optical fibers and demonstrate the existence of dark soliton like structures, periodically recurring with distance.
© 1993 Optical Society of America
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