Soliton-effect compression of picosecond pulses in optical fibers with slowly decreasing dispersion

A mathematic model was obtained for the description of soliton-effect compression of picosecond pulses in optical fibers with slowly decreasing dispersion. Numerical simulations showed that, as compared with the case of conventional soliton-effect compressor, the compressed pulse from this kind of compressor is much shorter with a much higher peak power when the decrement velocity of the fiber dispersion is appropriately controlled. Furthermore, the compressed pulse is pedestal free. With a given input pulse, the highest peak power and the highest compression ratio correspond to an optical decrement velocity of the fiber dispersion which relates not only to the initial peak power but also to the initial pulse width of the input pulse.