| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-wavelength simultaneous absorption spectroscopic device for reducing the effect caused by the damping coefficient inherent to a substance to be enhanced in measuring precision.SOLUTION: The multi-wavelength simultaneous absorption spectroscopic device includes: a branch part (120) for branching the laser beam, which is output from a carrier envelope offset (CEO) locked optical frequency com light source into two laser beams, a probe beam extraction part (130) for applying one laser beam of the branched laser beams to a cavity (131), in which a measuring target is installed, as a probe beam to extract the output waveform of the probe beam, a reference beam extraction part (140) for shifting the other laser beam of the branched laser beams in frequency as a reference beam and applying the frequency shifted reference beam to a cavity (142) having the same constitution as the cavity (131) and held to a vacuum state to extract the output waveform of the reference beam, an interference signal lead-out part (150) for allowing the probe beam to interfere with the reference beam and an interference signal adjusting part (160) for leading out the intensity of light at each mode of the optical frequency com of the interference signal. |
