Real-time dual frequency comb spectroscopy in the near infrared
arXiv:1208.4865 · doi:10.1063/1.4799282
Abstract
We use two femtosecond Erbium-doped fiber lasers with slightly different repetition rates to perform a modern type of Fourier transform spectroscopy without moving parts. The measurements are done in real time, and it takes less than 50 microseconds. We work with somewhat different spectral outputs from two Erbium-doped fiber lasers and employ spectral filtering based on a 2f-2f grating setup to select the common spectral region of interest, thereby increasing the signal-to-noise ratio. The interferogram is taken with a 20 cm long gas cell, containing a mixture of acetylene and air at atmospheric pressure, and is fast-Fourier-transformed to obtain the broadband spectral fingerprint of the gas.
arXiv comment4 pages, 4 figures
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Cited by in corpus (5)
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- Ultrafast electrooptic dual-comb interferometry
- 11-μs Time-resolved, Continuous Dual-Comb Spectroscopy with Spectrally Filtered Mode-locked Frequency Combs
- Multiheterodyne spectroscopy using interband cascade lasers
- Dynamics of platicons due to third-order dispersion