OPTICAL SPECTRUM ANALYZER AND METHOD OF MEASURING OPTICAL SPECTRUM

摘要

PROBLEM TO BE SOLVED: To provide an optical spectrum analyzer free of absorption by a specific wavelength due to an OH group and capable of precisely measuring the level of specific wavelengths of light to be measured.;SOLUTION: The optical spectrum analyzer 1 spectrally separates incident light to be measured into light having specific wavelengths, measures the light intensity of the light spectrally separated, and measures optical spectrum of the light to be measured. The analyzer comprises a diffraction grating 8 for separating the incident light to be measured L into specific wavelengths and outputting them as component light, a light receiving unit 2 for measuring the light intensity of each component light, a vessel 13 in which the diffraction grating 8 and the light receiving unit 2 are placed, and a gas inlet 12 and a gas outlet 14 for replacing the air inside the vessel 13 with a predetermined gas.;COPYRIGHT: (C)2003,JPO