Ultra-broadband dual-comb spectroscopy across 1.0-1.9 μm

Sho Okubo; Kana Iwakuni; Hajime Inaba; Kazumoto Hosaka; Atsushi Onae; Hiroyuki Sasada; Feng Lei Hong

doi:10.7567/APEX.8.082402

Ultra-broadband dual-comb spectroscopy across 1.0-1.9 μm

Sho Okubo, Kana Iwakuni, Hajime Inaba, Kazumoto Hosaka, Atsushi Onae, Hiroyuki Sasada, Feng Lei Hong

Department of Physics

Research output: Contribution to journal › Article › peer-review

108 Citations (Scopus)

Abstract

We have carried out dual-comb spectroscopy and observed in a simultaneous acquisition a 140-THz-wide spectrum from 1.0 to 1.9 μm using two fiber-based frequency combs phase-locked to each other. This ultrabroad-wavelength bandwidth is realized by setting the difference between the repetition rates of the two combs to 7.6 Hz using the sub-Hz-linewidth fiber combs. The recorded spectrum contains five vibration-rotation bands of C₂H₂, CH₄, and H₂O at different wavelengths across the whole spectrum. The determined transition frequencies of C₂H₂ agree with those from the previous sub-Doppler resolution measurement of individual lines using CW lasers within 2 MHz.

Original language	English
Article number	082402
Journal	Applied Physics Express
Volume	8
Issue number	8
DOIs	https://doi.org/10.7567/APEX.8.082402
Publication status	Published - 2015 Aug 1

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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abstract = "We have carried out dual-comb spectroscopy and observed in a simultaneous acquisition a 140-THz-wide spectrum from 1.0 to 1.9 μm using two fiber-based frequency combs phase-locked to each other. This ultrabroad-wavelength bandwidth is realized by setting the difference between the repetition rates of the two combs to 7.6 Hz using the sub-Hz-linewidth fiber combs. The recorded spectrum contains five vibration-rotation bands of C2H2, CH4, and H2O at different wavelengths across the whole spectrum. The determined transition frequencies of C2H2 agree with those from the previous sub-Doppler resolution measurement of individual lines using CW lasers within 2 MHz.",

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AU - Okubo, Sho

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AU - Inaba, Hajime

AU - Hosaka, Kazumoto

AU - Onae, Atsushi

AU - Sasada, Hiroyuki

AU - Hong, Feng Lei

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AB - We have carried out dual-comb spectroscopy and observed in a simultaneous acquisition a 140-THz-wide spectrum from 1.0 to 1.9 μm using two fiber-based frequency combs phase-locked to each other. This ultrabroad-wavelength bandwidth is realized by setting the difference between the repetition rates of the two combs to 7.6 Hz using the sub-Hz-linewidth fiber combs. The recorded spectrum contains five vibration-rotation bands of C2H2, CH4, and H2O at different wavelengths across the whole spectrum. The determined transition frequencies of C2H2 agree with those from the previous sub-Doppler resolution measurement of individual lines using CW lasers within 2 MHz.

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