Optical chip and optical communication system

The invention provides an optical chip and an optical communication system. The optical chip comprises an optical switch, a first optical splitter and a control unit, the optical switch comprises a first output port and a second output port, the first input port is used for being connected with optical communication equipment, or the first output port is used for being connected with the optical communication equipment, the first optical splitter comprises a second input port and a third output port, the second input port is connected with the second output port; when the optical communication equipment breaks down, the control unit controls the first optical splitter so that part or all of the first signal light can be output through the third output port. Through the high-integration structural design that the optical switch is connected with the optical splitter on the chip, when the optical communication equipment breaks down, the first signal light is output along the output port of the optical splitter, and the power of the first signal light is further adjusted through the optical splitter; therefore, the availability of the first signal light output from the port of the optical splitter is improved.