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  • 2017 European Conference on Lasers and Electro-Optics and European Quantum Electronics Conference
  • (Optica Publishing Group, 2017),
  • paper CH_P_35

Broadband mid-infrared cavity ringdown spectroscopy with frequency upconversion detector

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Detection of mid-infrared light (λ in range of 2–5 μm) is traditionally limited by noisy and slow detectors. Upconversion of infrared light to near-infrared wavelengths enables fast and sensitive mid-infrared (MIR) detection using regular Si detectors or photomultiplier tubes (PMT). Efficient continuous wave (CW) upconversion has been introduced in spectral imaging [1] and spectrometer applications [2]. We apply upconversion to cavity ringdown spectroscopy CRDS by using a pulsed supercontinuum light source at 3 μm wavelength region. Intracavity upconversion utilizes sum frequency generation (SFG) between 1064 nm Nd:YVO4 laser field and MIR wavelengths resulting detection at 780 nm region.

© 2017 IEEE

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