CO2 phase and amplitude spectra measured over 2 km outdoor path with a dual-comb spectrometer

We present dispersive dual-comb spectroscopy of atmospheric CO2 across a 2-km open-air path. By sending a single comb through the open-air path, both molecular phase spectrum and conventional absorbance spectrum are obtained. The measured phase spectra match expected molecular lineshape models.

[1]  Thomas Udem,et al.  Cavity-enhanced dual-comb spectroscopy , 2009, 0908.1928.

[2]  J W Nicholson,et al.  Direct-comb molecular spectroscopy with accurate, resolved comb teeth over 43 THz. , 2012, Optics letters.

[3]  I. Coddington,et al.  Spectroscopy of the methane {nu}{sub 3} band with an accurate midinfrared coherent dual-comb spectrometer , 2011 .

[4]  Jean-Daniel Deschênes,et al.  Optical referencing technique with CW lasers as intermediate oscillators for continuous full delay range frequency comb interferometry. , 2010, Optics express.

[5]  J. Childers,et al.  Open‐Path Fourier Transform Infrared Spectroscopy , 2006 .

[6]  Jean-Daniel Deschênes,et al.  Continuous real-time correction and averaging for frequency comb interferometry. , 2012, Optics express.

[7]  B. Bernhardt,et al.  Mid-infrared dual-comb spectroscopy with 2.4 μm Cr2+:ZnSe femtosecond lasers , 2010 .

[8]  S. Schiller,et al.  Spectrometry with frequency combs. , 2002, Optics letters.

[9]  Esther Baumann,et al.  Broad-band frequency references in the near-infrared: Accurate dual comb spectroscopy of methane and acetylene , 2013 .

[10]  J. Genest,et al.  Dual-comb spectroscopy using frequency-doubled combs around 775 nm. , 2013, Optics express.

[11]  J. Genest,et al.  Spectrally resolved laser ranging with frequency combs. , 2010, Optics express.

[12]  Esther Baumann,et al.  Optical two-way time and frequency transfer over free space , 2013 .

[13]  I. Coddington,et al.  Coherent dual-comb spectroscopy at high signal-to-noise ratio , 2010 .

[14]  Markus Brehm,et al.  Frequency-comb infrared spectrometer for rapid, remote chemical sensing. , 2005, Optics express.

[15]  T. Hänsch,et al.  Adaptive dual-comb spectroscopy in the green region. , 2012, Optics letters.

[16]  Tom Gardiner,et al.  High-power asynchronous midinfrared optical parametric oscillator frequency combs. , 2013, Optics letters.

[17]  Tom Gardiner,et al.  Asynchronous midinfrared ultrafast optical parametric oscillator for dual-comb spectroscopy. , 2012, Optics letters.

[18]  Jean-Daniel Deschênes,et al.  Active Fourier-transform spectroscopy combining the direct RF beating of two fiber-based mode-locked lasers with a novel referencing method. , 2008, Optics express.

[19]  T. J. Parker.  Dispersive Fourier transform spectroscopy , 1990 .

[20]  I. Coddington,et al.  Coherent multiheterodyne spectroscopy using stabilized optical frequency combs. , 2007, Physical review letters.

[21]  Fritz Keilmann,et al.  Time-domain mid-infrared frequency-comb spectrometer. , 2004, Optics letters.

[22]  M. D. Tucker,et al.  Open-path Fourier transform infrared spectroscopy , 1999 .

[23]  Ian Coddington,et al.  Sensitivity of coherent dual-comb spectroscopy. , 2010, Optics express.

[24]  Jérôme Genest,et al.  Chemical detection with hyperspectral lidar using dual frequency combs. , 2013, Optics express.

[25]  William C Swann,et al.  Time-domain spectroscopy of molecular free-induction decay in the infrared. , 2010, Optics letters.

[26]  I. Coddington,et al.  Open-Path Dual-Comb Spectroscopy of Greenhouse Gases , 2013, CLEO 2013.