Pulse shape transformation upon reflection and transmission in bragg structures

The transformation of the shape of pulse reflected and transmitted by Bragg mirrors, resonators, and structures with chirp variation of thickness of the “period” under conditions than carrier frequency is in the vicinity of the resonance Bragg frequency is considered. Integral and differential estimates of the delay time have been compared. The coefficients of skewness and kurtosis for the reflected and transmitted pulses with various duration versus carrier frequency if it was in Bragg reflections band were calculated. The conditions for the appearance of negative time delay of mass center of the reflected pulse have been determined. The values of group delay for layered structures with a small chirp variation of optical (electrical) thickness of the period along longitudinal coordinates have been obtained.