Method and System for Waveguide Mode Filters
AssigneeLuxtera, Inc.
InventorsAttila Mekis, Thierry Pinguet
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Abstract
A method and system for waveguide mode filters are disclosed and may include processing optical signals of a fundamental mode and higher-order modes by filtering the higher-order modes in rib waveguides in a photonic chip. The higher-order modes may be filtered utilizing doped regions and/or patterns in one or more slab sections in the rib waveguides. The patterns may be periodic or aperiodic along the rib waveguides. The higher-order modes may be filtered utilizing varying widths of slab sections, or doped, patterned, and/or salicided ridges on the slab sections in the rib waveguides. The higher-order modes may be attenuated by scattering and/or absorbing the modes. The chip may comprise a CMOS photonic chip.
Claims24
A method for processing optical signals, the method comprising:
- in a chip comprising a photonic circuit, said photonic circuit comprising one or more rib waveguides for processing optical signals, said one or more rib waveguides supporting a fundamental mode and one or more higher-order modes:
- filtering said one or more higher-order modes in said rib waveguide while allowing said fundamental mode to propagate.
A system for processing optical signals, the system comprising:
- a photonic circuit, said photonic circuit comprising one or more rib waveguides for processing optical signals, said one or more rib waveguides supporting a fundamental mode and one or more higher-order modes, said one or more rib waveguides being operable to:
- filter said one or more higher-order modes while allowing said fundamental mode to propagate through said one or more rib waveguides.
Dependencies are inferred from the claim text.