Abstract: A system configured to provide information via an optical signal includes an optical tag circuit comprising an electric power source configured to generate an electric current for powering the optical tag circuit from incident light and a light emitter configured to emit the information as an encoded optical signal at an emission frequency. The system also includes an optical tag circuit reader including an image capture device configured to capture the encoded optical signal at a capture frequency without requiring synchronization of the capture frequency to the emission frequency and a processor configured to obtain the information from the encoded optical signal.