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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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
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.
ISSN (Online):1558-2213

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