INSTRUMENT FOR MEASURING WAVELENGTH, INSTRUMENT FOR MEASURING OPTICAL CHARACTERISTIC, METHOD OF MEASURING THE WAVELENGTH, AND SOFTWARE ARTICLE

摘要

PROBLEM TO BE SOLVED: To enhance accuracy of wavelength measurement. ;SOLUTION: This wavelength measuring instrument 20 for measuring wavelengths of plural successive optical signals (t) is provided with a wavemeter unit 30 for measuring the first wavelength value 1(t) about the optical signals (t), an absolute measurement unit 40 for measuring an absolute value having a wavelength characteristic determined in known absolute wavelength values and covered with the optical signals (t) out of the known absolute values, as the second wavelength value 2(t), and an evaluation unit 50 for receiving the first and second wavelength values 1(t), 2(t) measured hereinbefore, and for providing a wavelength values 1'(t) corrected based on a mutual comparison result between the measured first and second wavelength values 1(t), 2(t).;COPYRIGHT: (C)2003,JPO