An optical transistor is disclosed. An apparatus according to aspects of the present invention includes optical waveguide disposed in semiconductor material. A diode structure is disposed in the optical waveguide. The diode structure includes P and N regions. An electrical switch coupled to the P region and the N region of the diode structure. The electrical switch is coupled to switchably short circuit the P and N regions of the diode structure together.

 
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> Coupled waveguide optical microresonator

~ 00330