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We report polarization independent Bragg grating wavelength filter using polarization conversion. A rib waveguide, air clad or non-vertical waveguide sidewall and asymmetric grating structure can be used to generate the polarization rotation.
We report wavelength filter for fiber to the home system using multiple interferometers to synthesize the desired wavelength response. Each device is designed to be polarization independent. The MMI and Mach-Zehnder type devices were tested.
We report wavelength filter using coupled Si waveguides and its high order mode. The wavelength dispersion difference between modes can be used to construct an add/drop wavelength filter. Devices incorporating reflective mode conversion grating and slot/twin waveguide are reported.
We report the design of the Mach-Zehnder interferometer wavelength filter using multiple Si waveguide structure sections. Tolerance to width error, temperature shift and polarization independence can be attained.
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