Coupling Gap Analysis of Microring Photonic Wavelength Switch

Abstract

Microring resonators side coupled to signal waveguides provide compact, narrow band, and large free spectral range photonic channel dropping wavelength switch. Wavelength switch with improved passband characteristics and larger out-of-band signal rejection are realized through the coupling of rings. The analysis of these devices is demonstrated by the novel method of coupling. The response of switch comprised of different coupling gap may be written down by attenuation ratio.