OPTICAL SPECTRUM ANALYZER AND MULTICHANNEL MEASUREMENT APPARATUS USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an optical spectrum analyzer and a multichannel measurement apparatus, using the same allowing wavelength measurement for a plurality of light rays at a high speed and with high accuracy.;SOLUTION: A plurality of light rays to be measured Pb from an optical sensor section 21 are received by a plurality of entrance sections 31 of the optical spectrum analyzer 30 and are allowed to enter with their optical axes being aligned parallel to each other and perpendicular to the diffraction grooves of a diffraction grating 32. Diffracted light rays, emitted from the diffraction grating 32, are received by a reflecting plate 40 of a reflector 35 to be reflected toward the diffraction grating 32. Diffracted light rays, emitted from the diffraction grating at a predetermined angle, are received by a plurality of photoelectric convertors 50, respectively. A drive signal generator 55 provides the reflector 35 with an electrical signal, having a frequency corresponding to the natural frequency of a portion, consisting of a shaft section 38 and the reflecting plate 40, to provide the portion with reciprocal rotational drive with the natural frequency and sweeps the wavelength of light received by each photoelectric convertor 50 within a predetermined wavelength range.;COPYRIGHT: (C)2005,JPO&NCIPI