SPECTRAL MEASUREMENT METHOD, SPECTRAL MEASUREMENT SYSTEM, AND BROADBAND PULSED LIGHT SOURCE UNIT

摘要

[Object] The object of the invention is to present a new spectral measurement technique enabling a measurement even if light to be measured exists within a very short period.;[Means for Solution] A broadband pulsed light wave L1 where wavelength shifts temporally and continuously in a pulse interferes with a light wave L0 to be measured. The intensity at each wavelength of the light wave L0 to measured is obtained by the Fourier transform of the output signal from a detector 5 that has detected the intensity of the wave resultant from the interference. A laser beam L2 from a laser source 1 is converted to a supercontinuum wave L3 by a nonlinear optical element 2. A pulse extension element 3 extends pulses of the supercontinuum wave L3, thus generating the broadband pulsed light wave L1.