Abstract

We suggest a compact and efficient duplexer using the multimode interference (MMI) effect and the extraneous self-imaging phenomenon for gigabit-capable passive optical network and gigabit Ethernet passive optical network applications. To experimentally evaluate the suggested duplexer, silica-based MMI couplers were tested using light sources with wavelengths of 1310 and 1490nm. From the ex perimental results, this device showed relative output powers of 0.3 and 0.7dBm for the light sources with 1490 and 1310nm wavelengths, respectively. The return power was measured to be less than 40dBm.

© 2009 Optical Society of America

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