Polarization-insensitive silicon nitride photonic receiver at 1 μm for optical interconnects
Journal article, 2024
This paper demonstrates with FDTD simulations a silicon nitride polarization independent coarse wavelength division multiplexing (CWDM) receiver platform based on square waveguides for optical interconnects at 1 μm. Here, the channel spacing of the demultiplexers is much smaller than standard CWDM systems (25 nm) and is set to 8 nm. To avoid high waveguide propagation and radiation losses, several waveguide dimensions were considered. The 450 nm (width) x 450 nm (height) waveguide presented a good tradeoff between low loss and single-mode behavior and was therefore selected. The demultiplexer has a simulated polarization dependence on the waveguide's width variations of 0.17 nm/nm. In addition, we present edge coupler designs with coupling loss within 2.5 dB for TE and TM polarization.
polarization dependence
Silicon
Mach-Zehnder interferometer
coupling loss
Optical interconnects
Vertical cavity surface emitting lasers
arrayed waveguide grating
Optical waveguides
Couplers
fiber misalignment
Silicon nitride
Propagation losses
Receivers
manufacturing tolerance
silicon nitride
Author
Alexander Caut
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Vijay Shekhawat
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Victor Torres Company
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Magnus Karlsson
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
IEEE Photonics Journal
19430655 (eISSN)
Vol. 16 3 1-7 2200507Subject Categories
Telecommunications
Other Electrical Engineering, Electronic Engineering, Information Engineering
DOI
10.1109/JPHOT.2024.3384870