Fourier transform spectroscopy around 3 μm with a broad difference frequency comb
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- Meek, S.A., Poisson, A., Guelachvili, G. et al. Appl. Phys. B (2014) 114: 573. doi:10.1007/s00340-013-5562-7
We characterize a new mid-infrared frequency comb generator based on difference frequency generation around 3.1 μm. High power per comb mode (>10−7 W/mode) is obtained over a broad spectral span (>750 nm, >790 cm−1). The source is used for direct absorption spectroscopy with a Michelson-based Fourier transform interferometer.