2019/04/06 by Hidenori Koresawa, Kyuki Shibuya, Takeo Minamikawa +9 · 7 citations
Chemistry · Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Algorithm #Computer science #Computer vision #Cyanide #Engineering #Fast Fourier transform #Fourier transform infrared spectroscopy #Fourier transform spectroscopy #Frequency domain #Lock (firearm) #Materials science #Optical frequency comb #Optics #Photonic and Optical Devices #Physics #Spectroscopy #Spectroscopy and Laser Applications #physics.app-ph #physics.optics
paper · pdf · open access · doi:10.1364/osac.2.001998
published in OSA Continuum 2(6), 1998 (Optica Publishing Group) · 28 Pages, 4 figures
arxiv created 2019/04/06 · openalex publication_date 2019/06/12 · arxiv updated 2019/08/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Dual-comb spectroscopy (DCS) is useful for gas spectroscopy due to high potential of optical frequency comb (OFC). However, fast Fourier transform (FFT) calculation of a huge amount of temporal data spends significantly longer time than the acquisition time of an interferogram. In this article, we demonstrate frequency-domain DCS by a combination of DCS with lock-in detection, namely LID-DCS. LID-DCS directly extracts an arbitrary OFC mode from a vast number of OFC modes without the need for FFT calculation. Usefulness of LID-DCS is demonstrated in rapid monitoring of transient signal change and spectroscopy of hydrogen cyanide gas.