Quadruple micro optical multiple asymmetric ring resonator performance analysis as optical filter

An analysis of a quadruple ring resonator is attempted in the present article in which transfer function is evaluated in z-domain using Mason's gain formula. Delay line signal processing technique is implemented to find the free spectral range (FSR) from the frequency response spectrum of the transfer function. In this article, a theoretical model of quadruple micro ring structure is proposed where the three asymmetrical micro optical ring is placed inside another micro ring. This model is capable of virtually eliminating crosstalk and providing FSR of about 490.5 THz which meets the ever-expanding demand of wide FSR. Group delay and dispersion characteristics is also presented in the article.