| 摘要 |
PURPOSE: A method for controlling a bias current of a semiconductor laser device and a communication network using the same are provided to increase a usable wavelength range and a temperature range of an optical subscriber network without temperature control, thereby economically increasing transmission capacity, transmission distance and the number of subscribers. CONSTITUTION: A communication network includes a central base station, an intermediate node, a semiconductor optical device(10), a temperature measuring device and a bias control unit(30). The central base station includes a multiplexer or an inverse multiplexer. The multiplexer and the inverse multiplexer multiplex and simultaneously transmit downward optical signals with different wavelengths and receive upward optical signals to inversely multiplex. The intermediate node receives downward optical signal from the central base station, inversely multiplexes the downward optical signals per a wavelength and transmit them to respective subscriber devices. |
