WebGrating couplers have some major advantages including compact size, wafer-level testing capability, and flexible coupling position, while there are also some drawbacks such as a relatively low coupling efficiency typically below 3 dB, narrow bandwidth, and high wavelength sensitivity. Web15 hours ago · Micro-dispenser-based optical packaging scheme for grating couplers Opt Lett. 2024 Apr 15;48(8):2162-2165. doi: 10.1364/OL.486595. ... The design concept is experimentally verified by comparing several exemplary grating couplers with and without a µlens on top. A difference of less than 1 dB between incident angles of 7° and 14° is …
Backscattering design for a focusing grating coupler with ... - Nature
The experimental characterization was carried out by means of a vertical coupling scheme, using polarization maintaining (PM) single mode fibers. The optical source was a PM external cavity laser (ECL), tunable from 1523 to 1600 nm at 5 pm steps, and a power meter was used to measure the output optical power … See more Full vectorial 2D-FDTD simulations were carried out using FDTD SolutionsTM (by Lumerical Inc.). The 2D computational area was set to be 33.4 μm wide and 5.8 … See more Based on simulation results, we fabricated the apodized GC design yielding the highest CE in a 260 nm Si-thick SOI platform (e = 160 nm, F 0 = 0.9, R = 0.025 μm−1). … See more WebJan 1, 2024 · The grating coupler is a periodic structure that implements the input and output of signals between devices. The light source is incident on the grating structure through the optical fiber, and light is coupled into the silicon optical waveguide through the diffraction of grating. chitose winery
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WebApr 12, 2024 · We propose a perfectly vertical coupling scheme based on metasurface deflectors (meta-deflectors) and grating couplers (GCs). An approach for optimizing the GCs based on the Gaussian-fitting using the genetic algorithm is proposed. An meta-deflector based on amorphous silicon (a-Si) pillars is designed to the optimal coupling … WebAug 1, 2024 · Grating coupler (GC) is one of important light-coupling schemes in integrated photonic devices, it can be placed at arbitrary locations on the wafer and has large alignment-tolerance, which can facilitate optical components evaluation. WebSep 1, 2012 · Sharing the same etching profile as that of the CMOS poly-silicon gate layer, the fabrication of the grating couplers is fully embedded in the CMOS process without adding any additional masks... grass catcher bags for riding mowers