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Fabrication-tolerant four-channel wavelength-division-multiplexing filter based on collectively tuned Si microrings

(2013) JOURNAL OF LIGHTWAVE TECHNOLOGY. 31(16). p.3085-3092
Author
Organization
Project
Center for nano- and biophotonics (NB-Photonics)
Abstract
We demonstrate a robust, compact and low-loss four-channel wavelength-division multiplexing (WDM) filter based on cascaded double-ring resonators (2RR) in silicon. The flat-top channel response obtained by the second-order filter design is exploited to compensate for the detrimental effects of local fabrication variations and their associated phase errors on the ring-based filter response. Full wafer-scale characterization of a cascaded, four-channel 2RR filter with channel spacing of 300 GHz shows an average worst-case insertion loss below 1.5 dB and an average worst-case crosstalk below -18 dB across the wafer, representing a substantial improvement over a first-order based ring (1RR) design. The robust 2RR filter design enables the use of a simple collective thermal tuning mechanism to compensate for global fabrication variations as well as for global temperature fluctuations of the WDM filter, the WDM laser source, or both. Highly uniform collective heating is demonstrated using integrated doped silicon heaters. The compact filter footprint of less than 50 x 50 mu m(2) per channel enables straightforward scaling of the WDM channel count to 8 channels and beyond. Such low-loss collectively tuned ring-based WDM filters can prove beneficial in scaling the bandwidth density of chip-level silicon optical interconnects.
Keywords
silicon-on-Insulator (SOI), DEVICES, wavelength-division multiplexing, Design for manufacturing, microring resonators

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Citation

Please use this url to cite or link to this publication:

Chicago
De Heyn, Peter, Jeroen De Coster, Peter Verheyen, Guy Lepage, Marianna Pantouvaki, Philippe Absil, Wim Bogaerts, Joris Van Campenhout, and Dries Van Thourhout. 2013. “Fabrication-tolerant Four-channel Wavelength-division-multiplexing Filter Based on Collectively Tuned Si Microrings.” Journal of Lightwave Technology 31 (16): 3085–3092.
APA
De Heyn, Peter, De Coster, J., Verheyen, P., Lepage, G., Pantouvaki, M., Absil, P., Bogaerts, W., et al. (2013). Fabrication-tolerant four-channel wavelength-division-multiplexing filter based on collectively tuned Si microrings. JOURNAL OF LIGHTWAVE TECHNOLOGY, 31(16), 3085–3092.
Vancouver
1.
De Heyn P, De Coster J, Verheyen P, Lepage G, Pantouvaki M, Absil P, et al. Fabrication-tolerant four-channel wavelength-division-multiplexing filter based on collectively tuned Si microrings. JOURNAL OF LIGHTWAVE TECHNOLOGY. 2013;31(16):3085–92.
MLA
De Heyn, Peter, Jeroen De Coster, Peter Verheyen, et al. “Fabrication-tolerant Four-channel Wavelength-division-multiplexing Filter Based on Collectively Tuned Si Microrings.” JOURNAL OF LIGHTWAVE TECHNOLOGY 31.16 (2013): 3085–3092. Print.
@article{4171796,
  abstract     = {We demonstrate a robust, compact and low-loss four-channel wavelength-division multiplexing (WDM) filter based on cascaded double-ring resonators (2RR) in silicon. The flat-top channel response obtained by the second-order filter design is exploited to compensate for the detrimental effects of local fabrication variations and their associated phase errors on the ring-based filter response. Full wafer-scale characterization of a cascaded, four-channel 2RR filter with channel spacing of 300 GHz shows an average worst-case insertion loss below 1.5 dB and an average worst-case crosstalk below -18 dB across the wafer, representing a substantial improvement over a first-order based ring (1RR) design. The robust 2RR filter design enables the use of a simple collective thermal tuning mechanism to compensate for global fabrication variations as well as for global temperature fluctuations of the WDM filter, the WDM laser source, or both. Highly uniform collective heating is demonstrated using integrated doped silicon heaters. The compact filter footprint of less than 50 x 50 mu m(2) per channel enables straightforward scaling of the WDM channel count to 8 channels and beyond. Such low-loss collectively tuned ring-based WDM filters can prove beneficial in scaling the bandwidth density of chip-level silicon optical interconnects.},
  author       = {De Heyn, Peter and De Coster, Jeroen and Verheyen, Peter and Lepage, Guy and Pantouvaki, Marianna and Absil, Philippe and Bogaerts, Wim and Van Campenhout, Joris and Van Thourhout, Dries},
  issn         = {0733-8724},
  journal      = {JOURNAL OF LIGHTWAVE TECHNOLOGY},
  language     = {eng},
  number       = {16},
  pages        = {3085--3092},
  title        = {Fabrication-tolerant four-channel wavelength-division-multiplexing filter based on collectively tuned Si microrings},
  url          = {http://dx.doi.org/10.1109/JLT.2013.2273391},
  volume       = {31},
  year         = {2013},
}

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