A system includes a light emitting device on a first side of electrically isolated circuitry for transmitting an optical signal to a second side of the electrically isolated circuitry. The system also includes a driver for driving the light emitting device at an operational characteristic. The system further includes an optical receiver on the second side of the electrically isolated circuitry for receiving the optical signal from the light emitting device. The system also includes a sensor coupled with the optical receiver for sampling the intensity of the optical signal received by the optical receiver. The sensor is communicatively coupled with the driver and configured to transmit the sampled intensity of the optical signal received from the light emitting device to the driver, and the driver is configured to adjust the operational characteristic of the light emitting device based upon the sampled intensity of the optical signal.