Park, Vaughan, Fleming & Dowler LLP
Optical device with a CMOS-compatible echelle grating
An optical multiplexer/de-multiplexer (MUX/de-MUX) includes a two-dimensional pattern of features in a propagation region that conveys an optical signal having wavelengths. A given feature in this pattern has a characteristic length and the features have an average pitch, both of which are less than fundamental smallest of the wavelengths divided by an effective index of refraction of the propagation region. Moreover, an optical device in the optical MUX/de-MUX images and diffracts the optical signal using a reflective geometry, and provides the imaged and diffracted optical signal to output ports. For example, the optical device may include an echelle grating.
Oracle International Corporation
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Ying L. Guoliang Xuezhe Ashok V.
Luo Li Zheng Krishnamoorthy