Journal
OPTICS LETTERS
Volume 43, Issue 7, Pages 1554-1557Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.43.001554
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC) [CRDPJ499664]
- Fonds de Recherche du Quebec-Nature et Technologies (FRQNT) [2016-NC-190737]
- PROMPT Quebec [52_Rusch 2016.09]
- TELUS
- Aeponyx
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Advanced optical interconnects require high-speed links, which can be achieved by combining high channel rates with wavelength-division multiplexing (WDM). We report a multi-channel transmitter using cascaded microring modulators (MRMs) in silicon photonics. One MRM works as a flexible-grid optical comb generator, while the others work as channel modulators. With a single-wavelength laser input, we achieve flexible channel spacing (up to 25 GHz) with a tone-to-noise ratio above 54 dB at low power consumption of less than 4.6 mW. We examine experimentally multi-channel transmission modulating data onto adjacent comb lines without significant signal crosstalk. This single-laser, flexible-grid WDM transmitter is a scalable solution: more comb lines can be obtained using uncoupled MRMs in a series. To the best of our knowledge, this is the first demonstration of monolithic integration of a comb generator and multi-channel modulators for ultra-compact, power-efficient WDM photonic interconnects. (c) 2018 Optical Society of America
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