| 摘要 |
A WDM(Wavelength Division Multiplexing) apparatus having a protection switching function using a tunable laser is provided to reduce an investment cost without a performance deterioration by introducing a switching scheme of one to N structure. A WDM apparatus having a protection switching function using a tunable laser includes a plurality of 1 x 2 optical couplers(601), a plurality of transmitter units(604), two optical multiplexers(605,606), an N:1 optical switch(602), and a tunable unit. The 1 x 2 optical couplers divide an output of each of subscribers into first and second optical signals. The transmitter units receive the first optical signal of the 1 x 2 optical couplers, and generate an optical signal of a different wavelength. The optical multiplexers optically multiplex the output of the transmitter units. The N:1 optical switch receives the second optical signal of the 1 x 2 optical couplers, and selects one of the received second optical signal. The tunable unit receives an output of the N:1 optical switch, varies and converts a wavelength of the tunable laser to an optical signal of a specific wavelength. The 2 x 1 optical couplers mix the optical output of the tunable unit and the optical output of the optical multiplexers. |
