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 |
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Article number | 082402 |
Journal | Applied Physics Express |
Volume | 8 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2015 Aug 1 |
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)