Design of self-similar pulse compression fiber based on chirp compensation technology

In order to obtain high power and high quality ultrashort pulse light source, the chirp compensation fiber design of self-similar pulse was studied for the first time using strong linear chirp generated by the dispersion decreasing fiber (DDF). Firstly, the ultra-short pulse output with half height full width of 52.6fs and peak power of 684.5W was obtained by using dispersion compensation fiber. On this basis, the design of dispersion increasing compensation fiber was studied, and the effects of dispersion-linear-increased fiber and dispersion-exponential-increased fiber on the compression of self-similar pulses were emphatically discussed. When the dispersion increasing coefficient was respectively set to 1km^-1, 5km^-1, 10km^-1, the shortest output pulse width, peak power and the required compensated fiber length were obtained by numerical simulation. The results show that the dispersion increasing fiber can shorten the length of the compensated fiber greatly, which is beneficial to reduce the loss caused by pulse compression, and finally obtain high power ultrashort pulse output with half height full width of 61.8fs and 64.4fs. This result is helpful to the design of self-similar pulse compression fiber.