TY - JOUR
T1 - Computational coherent averaging for free-running dual-comb spectroscopy
AU - Sterczewski, Lukasz A.
AU - Westberg, Jonas
AU - Wysocki, Gerard
N1 - Funding Information:
DARPA SCOUT Program (W31P4Q161001); DARPA SIGMA+ Program (HR00111920006); Thorlabs Inc.; The Kosciuszko Foundation Research Grant; Foundation for Polish Science (FNP) (START 085.2018). The authors would like to thank Prof. Jérôme Faist at ETH and Dr. Mahmood Bagheri at JPL for providing the LWIR QCLs and the ICLs used in this work. Prof. Qing Hu at MIT is acknowledged for providing the THz QCL combs. Furthermore, the authors express sincere gratitude to Prof. Alexander Gaeta and Dr. Mengjie Yu at Columbia University for the microresonator DCS data, and Prof. Jérôme Genest and Nicolas Hébert at Université Laval in Canada for providing the passively mode-locked waveguide laser DCS data. The authors would also like to thank Dr. David Burghoff at University of Notre Dame for fruitful discussions and comments during the developments of the CoCoA algorithm.
Funding Information:
DARPA SCOUT Program (W31P4Q161001); DARPA SIGMA+ Program (HR00111920006); Thorlabs Inc.; The Kosciuszko Foundation Research Grant; Foundation for Polish Science (FNP) (START 085.2018).
Publisher Copyright:
© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
PY - 2019/8/19
Y1 - 2019/8/19
N2 - 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 enable 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.
AB - 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 enable 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.
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U2 - 10.1364/OE.27.023875
DO - 10.1364/OE.27.023875
M3 - Article
C2 - 31510286
AN - SCOPUS:85071097694
SN - 1094-4087
VL - 27
SP - 23875
EP - 23893
JO - Optics Express
JF - Optics Express
IS - 17
ER -