Patent ID: 6900883

Claim:
A swept-wavelength loss measuring system comprising: a tunable laser source outputting light with a wavelength thereof being continuously varied, and along with this, outputting measuring trigger signals at arbitrary intervals, a part of the outputted light being inputted to a DUT; a light intensity measuring unit having at least one photodetector disposed for receiving light transmitted through the DUT, and being connected to the tunable laser source, the light intensity measuring unit measuring an intensity of the received light with the at least one photodetector in response to reception of each of the measuring trigger signals from the tunable laser source, and outputting intensity information; a wavelength measuring unit disposed for receiving the rest other part of the outputted light from the tunable laser source and connected to the tunable laser source, the wavelength measuring unit measuring a wavelength of the outputted light from the tunable laser source in response to reception of each of the measuring trigger signals, and outputting wavelength information; and an arithmetic operation unit connected to the light intensity measuring unit and the wavelength measuring unit, the arithmetic operation unit receiving the light intensity information and the wavelength information outputted from the light intensity measuring unit and the wavelength measuring unit, respectively, carrying out an arithmetic operation of the light intensity information and the wavelength information, and outputting a light intensity value relative to each wavelength.