An optical receiving device of the present invention receives optical signals from an optical transmitting device which uses a modulation format wherein an optical intensity waveform of each symbol is return-to-zero pulse, and converts the received optical signals into digital signals by a conversion process of an analog to digital converter. The therapeutic composition comprises olive oil and tea tree oil. The selective reflection layer is disposed over the vertical light emitting unit and the phosphor layer is arranged over the selective reflection layer. Clock circuitry generates a plurality of quadrature pulsed clock signals and delayed versions of the quadrature pulsed clock signals.