Optical frequency comb Faraday rotation spectroscopy
arXiv:1801.08399 · doi:10.1007/s00340-018-6951-8
Abstract
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.
References in corpus (5)
- Mid-Infrared Frequency Comb Fourier Transform Spectrometer
- Surpassing the Path-Limited Resolution of a Fourier Transform Spectrometer with Frequency Combs
- Continuous probe of cold complex molecules with infrared frequency comb spectroscopy
- Optical frequency comb spectroscopy at 3-5.4 μm with a doubly resonant optical parametric oscillator
- Mid-infrared continuous-filtering Vernier spectroscopy using a doubly resonant optical parametric oscillator