Electrically controlled wavelength multiplexing waveguide filter
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United States of America Patent
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Nov 3, 1998
Grant Date -
N/A
app pub date -
Dec 19, 1996
filing date -
Dec 20, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical switch for programmable spatial and spectral filtering of wavelength-multiplexed optical signals of different wavelengths. Multiple input and output waveguides are connected to a waveguide filter to allow adiabatic propagative evolution of an optical wave therebetween. A plurality of electrically-controlled diffraction gratings are formed in the waveguide filter to provide mode coupling between different optical modes. Each grating can be controlled electrically to achieve efficient power conversion between two different modes in the waveguide filter. Different modes can be directed to different output waveguides, thereby achieving programmable switching and signal modulation.
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