WAVELENGTH DISPERSION MEASURING DEVICE AND TECHNIQUE

PROBLEM TO BE SOLVED: To provide a wavelength dispersion measuring device and a technique thereof for measuring wavelength dispersion with sufficient accuracy without reflection at a receiving end, even if locations of the transmitting and receiving ends are different. SOLUTION: The wavelength dispersion measuring device includes a process generating two light signals with different wavelength at a transmitting end of light transmission path, a process multiplexing the two light signals to transmit from the transmitting end of the light transmission path, a process transmitting wavelength dispersion measurement information containing wavelength of the measuring start signal based on generation of the light signals and the two light signals from the transmitting end to the receiving end, a process splitting the two light signals transmitted through the light transmission path to convert into electric signal, respectively, at the receiving end of the light transmission path. and a process measuring phase difference of the two signals with different converted wavelengths according to the measuring start signal of wavelength dispersion measurement information from the transmitting end to derive wavelength dispersion in the light transmission path from the measured phase difference and wavelength difference of the two signals of the wavelength dispersion measurement information which were measured. COPYRIGHT: (C)2010,JPO&INPIT