Crosstalk in SOI Microring Resonator-Based Filters

We experimentally investigate the interchannel and intrachannel crosstalk of first- and second-order microring resonator (MRR) filters fabricated on a silicon-on-insulator platform. We find that there is an MRR radius that maximizes the wavelength division multiplexing channel count given a waveguid...

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Bibliographic Details
Published in:Journal of lightwave technology 2016-06, Vol.34 (12), p.2886-2896
Main Authors: Jayatilleka, Hasitha, Murray, Kyle, Caverley, Michael, Jaeger, Nicolas A. F., Chrostowski, Lukas, Shekhar, Sudip
Format: Article
Language:English
Subjects:
add-drop multiplexers
Bandwidths
Bit error rate
Channel spacing
Crosstalk
Fiber optic networks
microring resonator
Optical attenuators
Optical crosstalk
optical filters
optical interconnects
Power measurement
Silicon photonics
Wavelength division multiplexing
WDM
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Summary:We experimentally investigate the interchannel and intrachannel crosstalk of first- and second-order microring resonator (MRR) filters fabricated on a silicon-on-insulator platform. We find that there is an MRR radius that maximizes the wavelength division multiplexing channel count given a waveguide geometry, a maximum tolerable insertion loss, and a minimum permissible adjacent channel isolation. The measured power penalties due to interchannel crosstalk of two-channel demultiplexers based on first-order and series-coupled MRR filters are presented as functions of channel spacing and adjacent channel isolation. Next, we compare the intrachannel crosstalk of first-order, cascaded, and series-coupled MRR add-drop filters. Our results show that first-order MRR devices are unsuitable for simultaneous add-drop operation at high data rates and small channel spacings. Intrachannel crosstalk of cascaded and series-coupled designs are measured as functions of the data rate and the level of detuning between the MRRs. Low intrachannel crosstalk power penalties are demonstrated for cascaded and series-coupled MRR filters for data rates up to 20 Gb/s. Based on the measured results, we present requirements for the input-to-through response of add-drop filters that will ensure low intrachannel crosstalk.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2015.2480101