Journal ArticleDOI
Integrated Optical Linear Edge Filters Using Apodized Sub-Wavelength Grating Waveguides in SOI
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TLDR
In this article, an integrated optical apodized subwavelength grating waveguide is designed and demonstrated exhibiting high-extinction edge-filter characteristics with a linear rolloff in the dB scale.Abstract:
An integrated optical apodized sub-wavelength grating waveguide is designed and demonstrated exhibiting high-extinction edge-filter characteristics with a linear roll-off in the dB scale. For a given waveguide cross-sectional geometry with fixed grating duty cycle and period, it has been shown that the apodized device length $L_{g}$ and width $W_{m}$ are the two important parameters deciding the band-edge position, roll-off and broadband extinction around the Bragg wavelength. The experimental results from fabricated devices ( $L_{g} = 70\,\,\mu \text{m}$ and $W_{m} = 2.5\,\,\mu \text{m}$ ) in silicon-on-insulator substrates (device layer ~ 220 nm and buried oxide layer $\sim ~2~\mu \text{m}$ ) show a smooth band-edge roll-off of > 3.5 dB/nm ( $\lambda _{edge} \sim ~1550$ nm) with a stopband ( $\Delta \lambda _{sb}>50$ nm) extinction of > 40 dB and a nearly flat-top passband ( $\Delta \lambda _{pb}>100$ nm) with negligible insertion loss of ~ 0.5 dB.read more
Citations
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Metal-Printing Defined Thermo-Optic Tunable Sampled Apodized Waveguide Grating Wavelength Filter Based on Low Loss Fluorinated Polymer Material
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Patent
Tunable optical differentiator based on silicon-based metamaterial
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References
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Journal ArticleDOI
Ultra-Broadband Add-Drop Filter/Switch Circuit Using Subwavelength Grating Waveguides
TL;DR: An ultrabroadband add-drop filter/switch circuit is designed and demonstrated by integrating a pair of subwavelength grating waveguides in a Mach-Zehnder interferometer configuration using silicon photonics technology.
Journal ArticleDOI
Design and Demonstration of Apodized Comb Filters on SOI
Venkat Veerasubramanian,Guillaume Beaudin,Alexandre Giguere,B. Le Drogoff,Vincent Aimez,Andrew G. Kirk +5 more
TL;DR: In this article, the authors report on the design, modeling, and characterization of apodized comb filters in the silicon-on-insulator platform, where the comb response is generated by a convolution of a regular grating by a predetermined periodic sampling function.