@article{180776,
  keywords = {Fiber lasers, Laser sources, Phase noise, Phase retrieval, Quantum cascade semiconductor lasers, Semiconductor lasers},
  author = {Lukasz A. Sterczewski and Jonas Westberg and Gerard Wysocki},
  title = {Computational coherent averaging for free-running dual-comb spectroscopy},
  abstract = { Dual-comb spectroscopy is a rapidly developing spectroscopic technique that does not require any opto-mechanical moving parts and enables broadband and high-resolution measurements with microsecond time resolution. However, for high sensitivity measurements and extended averaging times, high mutual coherence of the comb-sources is essential. To date, most dual-comb systems employ coherent averaging schemes that require additional electro-optical components, which increase system complexity and cost. More recently, computational phase correction approaches that enables coherent averaging of spectra generated by free-running systems have gained increasing interest. Here, we propose such an all-computational solution that is compatible with real-time data acquisition architectures for free-running systems. The efficacy of our coherent averaging algorithm is demonstrated using dual-comb spectrometers based on quantum cascade lasers, interband cascade lasers, mode-locked lasers, and optically-pumped microresonators. },
  year = {2019},
  journal = {Optics Express},
  volume = {27},
  number = {17},
  pages = {23875-23893},
  month = {08/2019},
  publisher = {OSA},
  url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-27-17-23875},
  language = {eng},
}