TY - JOUR
T1 - Optical frequency comb Faraday rotation spectroscopy
AU - Johansson, Alexandra C.
AU - Westberg, Jonas
AU - Wysocki, Gerard
AU - Foltynowicz, Aleksandra
N1 - Funding Information:
The authors thank Amir Khodabakhsh for help with operating the DROPO. The work at UmU was supported by the Knut and Alice Wallenberg Foundation (KAW 2015.0159) and the Swedish Foundation for Strategic Research (ICA12-0031). The work at Princeton was supported by the DARPA SCOUT program (W31P4Q161001). The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Defense Advanced Research Projects Agency, the U.S. Army, or the U.S. Government. This article is part of the topical collection “Mid-infrared and THz Laser Sources and Applications” guest edited by Wei Ren, Paolo De Natale and Gerard Wysocki.
Funding Information:
with operating the DROPO. The work at UmU was supported by the Knut and Alice Wallenberg Foundation (KAW 2015.0159) and the Swedish Foundation for Strategic Research (ICA12-0031). The work at Princeton was supported by the DARPA SCOUT program (W31P4Q161001). The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Defense Advanced Research Projects Agency, the U.S. Army, or the U.S. Government.
Publisher Copyright:
© 2018, The Author(s).
PY - 2018/5/1
Y1 - 2018/5/1
N2 - We demonstrate optical frequency comb Faraday rotation spectroscopy (OFC-FRS) for broadband interference-free detection of paramagnetic species. The system is based on a femtosecond doubly resonant optical parametric oscillator and a fast-scanning Fourier transform spectrometer (FTS). The sample is placed in a DC magnetic field parallel to the light propagation. Efficient background suppression is implemented via switching the direction of the field on consecutive FTS scans and subtracting the consecutive spectra, which enables long-term averaging. In this first demonstration, we measure the entire Q- and R-branches of the fundamental band of nitric oxide in the 5.2–5.4 µm range and achieve good agreement with a theoretical model.
AB - We demonstrate optical frequency comb Faraday rotation spectroscopy (OFC-FRS) for broadband interference-free detection of paramagnetic species. The system is based on a femtosecond doubly resonant optical parametric oscillator and a fast-scanning Fourier transform spectrometer (FTS). The sample is placed in a DC magnetic field parallel to the light propagation. Efficient background suppression is implemented via switching the direction of the field on consecutive FTS scans and subtracting the consecutive spectra, which enables long-term averaging. In this first demonstration, we measure the entire Q- and R-branches of the fundamental band of nitric oxide in the 5.2–5.4 µm range and achieve good agreement with a theoretical model.
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U2 - 10.1007/s00340-018-6951-8
DO - 10.1007/s00340-018-6951-8
M3 - Article
AN - SCOPUS:85045749875
SN - 0946-2171
VL - 124
JO - Applied Physics B: Lasers and Optics
JF - Applied Physics B: Lasers and Optics
IS - 5
M1 - 79
ER -