Phase mismatching slope optimization for magneto-optic pulse compression

The collinear diffraction effects of linearly chirped Gaussian optical pulses with continuous magneto-static surface waves (MSSWs) excited in magneto-optic (MO) film waveguides under a horizontal bias magnetic field are theoretically studied. MO pulse coupling equations and the analytic solution are presented. It is shown that optical pulse compression based on MO Bragg diffraction is dependent on phase mismatching slope, which can be greatly increased by using different mode-number of incident and diffracted guided optical waves (GOWs) and appropriately choosing normalized thickness of MO film (ratio of the film thickness to the light wavelength). In TE0 → TM8 diffraction full-width-at-half-maximum (FWHM) ratio of the diffracted and incident optical pulses comes up to 38%.