宽带激光小尺度调制特性研究

his paper presented an algorithm for the transmission of broadband laser as the sum of the small broadband laser transmitted of each with a different center wavelength. we established a small-scale modulations theoretical model for broadband laser propagating in nonlinear media which we ignored the gain and loss of medium and mainly considered diffraction, self-phase modulation and cross-phase modulation caused the nonlinear self-focusing effects. We simulated propagation process of small-scale modulations of the broadband laser based on the algorithm of the split step Fourier. The results showed that the uniformity of the laser beam is improved to a certain broadening of the bandwidth.