Patent ID: 7167649

Claim:
A dense wavelength division multiplexing-passive optical network system utilizing self-injection locking of Fabry-Perot laser diodes, the system comprising: a central office for generating first optical signals of different wavelengths, and transmitting the first optical signals to a remote node, while receiving second optical signals of different wavelengths from the remote node; the remote node for demultiplexing a multiplexed signal of the first optical signals transmitted from the central office, and transmitting the demultiplexed first optical signals to respective optical network units (ONUs), the remote node also multiplexing the second optical signals transmitted from respective ONUs, and transmitting the multiplexed signal of the second optical signals to the central office; and the ONUs for receiving the first optical signals transmitted from the remote node, respectively, the ONUs also generating the second optical signals of different wavelengths, and transmitting the second optical signals to the remote node, respectively, wherein the central office includes a first partial mirror adapted to partially feed back the multiplexed signal of the first optical signals transmitted to the remote node, thereby self-injection locking a plurality of first transmitters included in the central office, and wherein the remote node includes a second partial mirror adapted to partially feed back the multiplexed signal of the second optical signals transmitted to the central office, thereby self-injection locking a plurality of second transmitters included in respective ONUs.