OPTICAL SPECTRUM ANALYZER

PROBLEM TO BE SOLVED: To achieve an optical spectrum analyzer capable of performing wavelength sweeping at a high-speed and obtaining high wavelength resolution. SOLUTION: The spectrum analyzer for separating light to be measured by a diffraction grating and measuring the separated light to be measured to obtain an optical spectrum is improved. The analyzer includes a deflection means for changing an incident angle of the light to be measured incident on the diffraction grating; a light receiving means for receiving the separated light to be measured and outputting an electric signal corresponding to the light intensity; and a signal processing part obtaining the optical spectrum of the light to be measured on the basis of the electric signal from the light receiving means. The plurality of light receiving means are arranged along the direction of wavelength dispersion of the diffraction grating, and output the electric signals independently from each other. COPYRIGHT: (C)2007,JPO&INPIT