摘要： In this paper, a wideband all-optical notch ?lter is proposed using two cascaded modi?ed add-drop resonators from chalcogenide glass (ChG) and GaAsInP-InP waveguide materials. The system consists of ChG main ring and two small side rings called phase modulators made of the GaAsInP-InP materials. The plane waves are fed at the input and add ports, from which the chaotic signal outputs can be generated by the nonlinear e?ect induced into the center ring. The results have been simulated based on the scattering matrix method. Results have shown that the generated chaotic signals can be used for switching and secured communications. An ultra-fast switching time of ～ 2 attoseconds is achieved. Moreover, the chaotic signals can be ?ltered by the stop band ?lters (notch ?lters). The free spectral range (FSR) of two cascaded ChGs is 1494.8 nm. The output wavelength of the notch ?lters is tunable from 748.0–2242.2 nm and 2242.8–3737.0 nm. The band-stop of the notch ?lter is 1494.2 nm. This approach will allow the implementation of the compact, and integrated notch ?lters in an on-chip scale circuit, which is useful for both light ?delity (LiFi) and wireless ?delity (WiFi) applications.