Title :
Asymmetrical interleaver filters based on one-dimensional photonic crystal theory
Author :
Yu, Shuai ; Zhang, Juan
Author_Institution :
Key Laboratory of Specialty Fiber Optics and Optical Access Networks, School of Communication and Information Engineering, Shanghai University, 160#, No.149, Yanchang Road, 200072, China
Abstract :
Based on the theory of one-dimensional photonic crystal, an asymmetrical interleaver filter is proposed. It is composed of cascaded thin-film glass cavities. Each thin-film glass cavity is formed by evaporating several layers of reflecting films on two surfaces of glass medium. Compared with other proposed structures, the proposed interleaver structure is not only very simple but also easy to accomplish. Moreover, flat passband and stopband can be obtained by the interleaver. A design example of a 50 GHz interleaver filter with duty cycle of 1∶5 is presented. The influence of each structural parameter on spectral performance, especially for the duty cycles is discussed. On this basis, design results of interleaver filters with duty cycle of 1∶3 and 1∶4 are shown and analyzed. A design example of an interleaver filter with five cascaded cavities is given at last.
Keywords :
Filtering theory; Glass; Information filtering; Optical fiber filters; Optical films; Optical filters; Optical surface waves; Passband; Photonic crystals; Transistors; Dense wavelength division multiplexing; duty cycle; interleaver filter; one-dimensional photonic crystal;
Conference_Titel :
Communications and Photonics Conference and Exhibition (ACP), 2009 Asia
Conference_Location :
Shanghai, China
Print_ISBN :
978-1-55752-877-3
Electronic_ISBN :
978-1-55752-877-3
