@article{180626,
  keywords = {Spectroscopy, heterodyne, Dispersion compensation devices, Semiconductor lasers, quantum cascade, Discrete Fourier transforms, Fourier transform infrared spectroscopy, Frequency combs, Frequency modulated lasers, Multimode lasers, Tunable lasers},
  author = {Jonas Westberg and Lukasz A. Sterczewski and Filippos Kapsalidis and Yves Bidaux and Johanna M. Wolf and Mattias Beck and J{\'e}r{\^o}me Faist and Gerard Wysocki},
  title = {Dual-comb spectroscopy using plasmon-enhanced-waveguide dispersion-compensated quantum cascade lasers},
  abstract = { In this Letter, we report on sub-millisecond response time mid-infrared dual-comb spectroscopy using a balanced asymmetric (dispersive) dual-comb setup with a matched pair of plasmon-enhanced-waveguide dispersion-compensated quantum cascade lasers. The system performance is demonstrated by measuring spectra of Bromomethane (CH3Br) and Freon 134a (CH2FCF3) at approximately 7.8~μm. A purely computational phase and timing-correction procedure is used to validate the coherence of the quantum cascade lasers frequency combs and to enable coherent averaging over the time scales investigated. The system achieves a noise-equivalent absorption better than 1{\texttimes}10-3  Hz-1/2, with a resolution of 9.8~GHz (0.326  cm-1) and an optical bandwidth of 1~THz (32  cm-1), with an average optical power of more than 1~mW per spectral element. },
  year = {2018},
  journal = {Optics Letters},
  volume = {43},
  number = {18},
  pages = {4522-4525},
  month = {09/2018},
  publisher = {OSA},
  url = {http://ol.osa.org/abstract.cfm?URI=ol-43-18-4522},
  language = {eng},
}