Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 32, Issue 14, Pages 867-870Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2020.3000727
Keywords
Optical resonators; Optical transmitters; Integrated optics; Optical attenuators; Optical feedback; Photonics; Optical crosstalk; Bragg gratings; multi-cavity resonators; elastic optical networks; optical demultiplexing; silicon photonics
Funding
- Italian National Project PREVENTION (Ministry of Foreign Affairs, Directorate General for the Country Promotion)
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Practical deployment of elastic optical networks requires key enabling technologies supporting the miniaturization of flexible optical transponders for provisioning large-bandwidth services at low-cost per users. A silicon photonics (SiP) reconfigurable optical frequency comb (OFC) demultiplexer based on passive optical filtering exhibiting a minimum spurious tone rejection (STR) of nearly 30dB at 12.5GHz tone spacing is here reported. Low power penalty due to inter-channel crosstalk (IXT) originated by finite STR is observed. Improved filter designs for reduced IXT and/or operation at 6.25GHz comb spacing are experimentally and numerically verified. By monolithic integration with SiP OFC sources and I-Q modulators the scheme has potentials for realizing ultra-compact multiple-flow optical transmitters with adaptive bandwidth and channel spacing.
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