An optical fiber transmission switching device for an optical network, comprising:
- a channel-end interface, including a first transmission port and a second transmission port;
- a terminal-end interface, including a terminal-end input port and a terminal-end output port;
- a first optical module, including a bi-directional optical port coupled to the first transmission port, an electrical output port, an electrical input port, a laser diode and an optical sensor;
- wherein the laser diode transforms electrical signals input via the electrical input port into optical signals and outputs the optical signals via the bi-directional optical port, and the optical sensor transforms the optical signals input via the bi-directional optical port into electrical signals and outputs the electrical signals via the electrical output port;
- a second optical module, including a bi-directional optical port coupled to the second transmission port, an electrical output port, an electrical input port, a laser diode and an optical sensor;
- wherein the laser diode transforms the electrical signals input via the electrical input port into the optical signals and output the optical signals via the bi-directional optical port, and the optical sensor transforms the optical signals input via the bi-directional optical port into electrical signals and output the electrical signals via the electrical output port;
- a first laser driver circuit, including an input port and an output port;
- wherein the output port is coupled to the electrical input port of the first optical module;
- a second laser driver circuit, including an input port and an output port;
- wherein the output port is coupled to the electrical input port of the second optical module;
- a first electrical amplifier, including an input port and an output port;
- wherein the input port is coupled to the electrical output port of the first optical module;
- a second electrical amplifier, including an input port and an output port;
- wherein the input port is coupled to the electrical output port of the second optical module;
- a first switching module, including an input port, a first output port and an second output port;
- wherein the input port is coupled to the terminal-end input port, the first output port is coupled to the input port of the first laser driver circuit, and the second output port is coupled to the input port of the second laser driver circuit;
- and
- a second switching module, including a first input port, a second input port and an output port;
- wherein the first input port is coupled to the output port of the first electrical amplifier, the second input port is coupled to the output of the second electrical amplifier, the output port is coupled to the terminal-end output port;
- wherein when the transmission of the optical signals at the first transmission port function normally, the electrical signals at the terminal-end output port are transformed from the optical signals received via the first transmission port;
- when the transmission of the optical signals at the first transmission port malfunctions, the electrical signals at the terminal-end output port are transformed from the optical signals received via the second transmission port.