Patent ID: 9742501
Date: 2017-08-22
CPC Classifications: H04B

Claim:
1. An optical communication system, comprising: an optical transmission device, comprising a modulation unit and a light-source unit, said modulation unit configured for receiving one or more digital signal and outputting one or more modulated signal to said light-source unit, and said light-source unit configured for transmitting one or more optical signal according to said one or more modulated signal; and an optical receiving device, including a solar panel, said solar panel configured for receiving said one or more optical signal and generating one or more electric signal, and giving said one or more digital signal according to the variation of said one or more electric signal; wherein said one or more digital signal includes a first segment and a second segment, said modulation unit reduces the amplitude of said second segment when said one or more digital signal is a high-level signal, and said modulation unit increases the amplitude of said second segment when said one or more digital signal is a low-level signal, said optical transmission device further includes a control unit transmitting a control signal to said modulation unit; and said modulation unit adjusts the ratio or/and amplitude of said first segment and said second segment of said one or more digital signal according to said control signal, said control unit adjusts the ratio or/and amplitude of said first segment and said second segment according to the bandwidth limitation of said solar panel.