Broadband Dual-Comb Spectroscopy in the Spectral Fingerprint Region

Abstract

Infrared spectroscopy in the spectral fingerprint region from 6-12 um accesses the largest molecular absorption cross-sections, permitting sensitive, quantitative and species-specific measurements. Here, we show how dual-comb spectroscopy--a form of high-speed Fourier-transform spectroscopy involving no moving parts and capable of very high resolutions--can be extended to the 6-8um wavelength band using femtosecond optical parametric oscillators (OPOs). By acquiring dual-comb interferograms faster than the mutual decoherence time of the OPO combs we implement line-shape-preserving averaging to obtain low-noise, high-fidelity spectra of H2O and CH4 at approximately 0.3 cm-1 resolutions from 1285-1585 cm-1.

References in corpus (12)

• Coherent, multi-heterodyne spectroscopy using stabilized optical frequency combs
• Coherent Raman spectro-imaging with laser frequency combs
• Adaptive real-time dual-comb spectroscopy
• Coherent Dual Comb Spectroscopy at High Signal to Noise
• Spectroscopy of the Methane ν3 Band with an Accurate Mid-Infrared Coherent Dual- Comb Spectrometer
• Operation of an optically coherent frequency comb outside the metrology lab
• Mid-Infrared Optical Frequency Combs based on Difference Frequency Generation for Molecular Spectroscopy
• Molecular fingerprint-region spectroscopy from 5-12 μm using an orientation-patterned gallium phosphide optical parametric oscillator
• Dual-Comb Coherent Raman Spectroscopy with Lasers of 1-GHz Pulse Repetition Frequency
• Raman-induced Kerr-effect dual-comb spectroscopy
• On-chip Dual-comb based on Quantum Cascade Laser Frequency Combs
• Massively parallel dual-comb molecular detection with subharmonic optical parametric oscillators

Cited by in corpus (11)

• Frequency comb spectroscopy
• Computational coherent averaging for free-running dual-comb spectroscopy
• Mid-infrared feed-forward dual-comb spectroscopy at 3 $\mu$m
• Broadband Dual Frequency Comb Spectroscopy in a Rapid Compression Machine
• Nonlinear silicon waveguides generating broadband, spectrally engineered frequency combs spanning 2.0-8.5 um
• Multi-microjoule GaSe-based mid-infrared optical parametric amplifier with an ultra-broad idler spectrum covering 4.2-16 μm
• Optical Frequency Comb Fourier Transform Spectroscopy of ${}^{14}$N${}_2$${}^{16}$O at 7.8 μm
• High-speed Fourier-transform infrared spectroscopy with phase-controlled delay line
• Creating mid-infrared single photons
• Upconversion mid-infrared dual-comb spectroscopy
• A versatile and narrow linewidth infra-red radiation source for ro-vibration state selected preparation of molecules in molecular beams