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Silicon photonic chip for 16-channel wavelength division (de-)multiplexing in the O-band

Journal Article · · Optics Express
DOI:https://doi.org/10.1364/OE.397141· OSTI ID:1643148
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We experimentally demonstrate a silicon photonic chip-scale 16-channel wavelength division multiplexer (WDM) operating in the O-band. The silicon photonic chip consists of a common-input bus waveguide integrated with a sequence of 16 spectral add-drop filters implemented by 4-port contra-directional Bragg couplers and resonant cladding modulated perturbations. The combination of these features reduces the spectral bandwidth of the filters and improves the crosstalk. An apodization of the cladding modulated perturbations between the bus and the add/drop waveguides is used to optimize the strength of the coupling coefficient in the propagation direction to reduce the intra-channel crosstalk on adjacent channels. The fabricated chip was validated experimentally with a measured intra-channel crosstalk of ∼−18.9 dB for a channel spacing of 2.6 nm. The multiplexer/demultiplexer chip was also experimentally tested with a 10 Gbps data waveform. The resulting eye-pattern indicates that this approach is suitable for datacenter WDM-based interconnects in the O-band with large aggregate bandwidths.

Sponsoring Organization:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
OSTI ID:
1643148
Journal Information:
Optics Express, Journal Name: Optics Express Journal Issue: 16 Vol. 28; ISSN 1094-4087; ISSN OPEXFF
Publisher:
Optical Society of AmericaCopyright Statement
Country of Publication:
United States
Language:
English

References (12)

Wavelength selective coupler with vertical gratings on silicon chip journal May 2008
A CMOS Compatible Ultracompact Silicon Photonic Optical Add-Drop Multiplexer with Misaligned Sidewall Bragg Gratings journal June 2017
Eight-Channel Silicon-Photonic Wavelength Division Multiplexer With 17 GHz Spacing journal September 2019
Advances in silicon photonics WDM devices conference February 2014
Wide bandwidth, low loss 1 by 4 wavelength division multiplexer on silicon for optical interconnects journal January 2011
Cascaded Mach-Zehnder wavelength filters in silicon photonics for low loss and flat pass-band WDM (de-)multiplexing journal January 2013
Two-period contra-directional grating assisted coupler journal January 2016
Athermal and flat-topped silicon Mach-Zehnder filters journal January 2016
Silicon photonic 8 × 8 cyclic Arrayed Waveguide Grating Router for O-band on-chip communication journal January 2018
Polarization-insensitive silicon nitride Mach-Zehnder lattice wavelength demultiplexers for CWDM in the O-band journal January 2018
Coupler-apodized Bragg-grating add–drop filter journal January 2013
25 × 50  Gbps wavelength division multiplexing silicon photonics receiver chip based on a silicon nanowire-arrayed waveguide grating journal January 2019

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