Single optical fiber repeater system

A single optical fiber repeater system, comprising:

• a first external device, for generating a first signal having a first wavelength;
• a second external device, for generating a second signal having the same first wavelength;
• a first switch;
• a second switch;
• and
• at least two transport paths, each transport path further comprising:
• a first optical fiber sharing apparatus, a second optical fiber sharing apparatus and an optical fiber;
• the first optical fiber sharing apparatus being connected to the first external device through the first switch, for transporting the first signal from the first external device to the optical fiber and receiving the second signal from the optical fiber to the first external device;
• the second optical fiber sharing apparatus being connected to the second external device through the second switch, for transporting the second signal from the second external device to the optical fiber and receiving the first signal from the optical fiber to the second external device;
• the optical fiber being connected to the first optical fiber sharing apparatus and the second optical fiber sharing apparatus, for transporting the first signal and the second signal;
• wherein the first external device and the second external device generate control signals to control the first witch and the second switch respectively to select a transport path from the at least two transport paths for transporting the first signal and the second signal;
• the second optical fiber sharing apparatus converts the first wavelength of the second signal to a second wavelength different from the first wavelength for transporting in the optical fiber;
• and the first optical fiber sharing apparatus converts the second wavelength of the received second signal into the first wavelength and then passes the second signal having the first wavelength to the first external device.