A Novel Interleaver Based on Dual-Pass Mach-Zehnder Interferometer

A novel interleaver based on a dual-pass Mach–Zehnder (M–Z) interferometer is proposed and analyzed by both theory and experiment. Compared with the traditional M–Z interferometer, the isolation of the new structure is enhanced greatly. When the frequency spacing reaches 50 GHz, its isolation is more than 25 dB. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 42: 253–255, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20268