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One of the extraordinary aspects of nonlinear wave evolution which has been observed as the spontaneous occurrence of astonishing and statistically extraordinary amplitude wave is called rogue wave. We show that the eigenvalues of the associated equation of nonlinear Schrodinger equation are almost constant in the vicinity of rogue wave and we validate that optical rogue waves are formed by the collision between quasi-solitons in anomalous dispersion fiber exhibiting weak third order dispersion.

We have demonstrated mode division multiplexed transmission using a space-optics based mode multiplexer/demultiplexer. In the experiment, 10 Gb/s NRZ-OOK signal and interfering CW light were simultaneously transmitted through a 2 km-long two-mode fiber with BER

We experimentally investigate the dispersion tolerance of transmitted OOK signals for all-optical NRZ-OOK to RZ-QPSK modulation format conversion using cross-phase modulation in nonlinear fiber at 10 Gsymbol/s by evaluating the bit error rate performance of the converted signal.

The ideal information carrier is invariable quantity during propagation in nonlinear dispersive fiber. This is eigenvalues of the associated equation of the nonlinear Schrodinger equation. We show the eigenvalue demodulation based on digital coherent technology.