Photonic integrated filter with widely tunable bandwidth

Orlandi, P., Morichetti, F., Strain, M. J., Sorel, M., Bassi, P. and Melloni, A. (2014) Photonic integrated filter with widely tunable bandwidth. Journal of Lightwave Technology, 32(5), pp. 897-907. (doi:10.1109/JLT.2013.2294345)

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Publisher's URL: http://dx.doi.org/10.1109/JLT.2013.2294345

Abstract

We present a comprehensive design, fabrication, and characterization analysis of compact silicon-on-insulator bandpass filters with widely tunable bandwidth. The filter architecture is based on an unbalanced Mach-Zehnder interferometer loaded with a pair of ring resonators. A wide bandwidth tunability (from 10% to 90% FSR) can be achieved by controlling the resonant frequency of the rings while preserving a good filter off-band rejection. Design rules are provided that take into account fabrication tolerances as well as losses. Furthermore, the use of tunable couplers allows a more flexible shaping of the spectral response of the filter. The sensitivity with respect to nonlinear effects is carefully investigated. Operation over a wavelength spectrum of 20 nm is demonstrated, making the device suitable for channel subset selection in WDM systems, reconfigurable filters for gridless networking and adaptive filtering of signals.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Sorel, Professor Marc and Strain, Dr Michael
Authors: Orlandi, P., Morichetti, F., Strain, M. J., Sorel, M., Bassi, P., and Melloni, A.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Journal of Lightwave Technology
Journal Abbr.:J. lightwave technol.
Publisher:IEEE
ISSN:0733-8724
ISSN (Online):1558-2213

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