Experimental study on supercontinuum generation in birefringent microstructure fibers with 30 femtosecond pulse

The supercontinuum generation attracts more and more interest in nonlinear optical fields. The propagation of 30 fs pulse with different power and polarization state in the birefringent microstructure fibers for supercontinuum generation is studied experimentally. The experiment results show that when the injected power increases, the induced phase modulation is responsible for the initial spectral broadening, and then the fission of higher order solitons into redshifted fundamental solitons and the blueshift of dispersive wave generation attribute to the board supercontinuum generation. By rotating the input polarization of the pump femtosecond laser, besides the redshifted higher order solitons fission and blueshifted dispersive wave generation, when the polarization of the pump pulse is parallel to the long axis direction (namely the angle is 0), the center wavelength of the dispersive wave is shorter than the short-axiss (namely the angle is 90). When the polarization equals to 45, there may come forth the blueshifted cross-phase wave, and the light spot of the white-supercontinuum is the biggest in the near field distributions among the three polarization states of the pump laser.