Open AccessCascaded Mach-Zehnder wavelength filters in silicon photonics for low loss and flat pass-band WDM (de-)multiplexing
Author(s) -
Folkert Horst,
William M. J. Green,
Solomon Assefa,
Steven M. Shank,
Yurii A. Vlasov,
Bert Jan Offrein
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.011652
Subject(s) - multiplexer , wavelength division multiplexing , silicon photonics , photonics , insertion loss , optics , optical filter , channel spacing , optical add drop multiplexer , multiplexing , transceiver , photonic integrated circuit , materials science , optoelectronics , wavelength , optical performance monitoring , physics , cmos , computer science , telecommunications
We present 1-to-8 wavelength (de-)multiplexer devices based on a binary tree of cascaded Mach-Zehnder-like lattice filters, and manufactured using a 90 nm CMOS-integrated silicon photonics technology. We demonstrate that these devices combine a flat pass-band over more than 50% of the channel spacing with low insertion loss of less than 1.6 dB, and have a small device size of approximately 500 × 400 µm. This makes this type of filters well suited for application as WDM (de-)multiplexer in silicon photonics transceivers for optical data communication in large scale computer systems.