Park, Vaughan, Fleming & Dowler LLP
Optical reflector based on a directional coupler and a coupled optical loop
An optical device includes an optical reflector based on a coupled-loopback optical waveguide. In particular, an input port, an output port and an optical loop in arms of the optical reflector are optically coupled to a directional coupler. The directional coupler evanescently couples an optical signal between the arms. For example, the directional coupler may include: a multimode interference coupler and/or a Mach-Zehnder Interferometer (MZI). Moreover, destructive interference during the evanescent coupling determines the reflection and transmission power coefficients of the optical reflector.
ORACLE INTERNATIONAL CORPORATION
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Xuezhe Ying L. Guoliang Ashok V.
Zheng Luo Li Krishnamoorthy