Cavity enhanced absorption spectroscopy using a broadband prism cavity and a supercontinuum source.

  title={Cavity enhanced absorption spectroscopy using a broadband prism cavity and a supercontinuum source.},
  author={Paul Salmon Michael Regan Ian Johnston and Kevin K Lehmann},
  journal={Optics express},
  volume={16 19},
We report the design and construction of a cavity enhanced absorption spectrometer using broadband Brewster's angle prism retroreflectors and a spatially coherent 500 nm to >1.75 microm supercontinuum excitation source. Using prisms made from fused silica an effective cavity reflectivity of >99.99% at 1.064 microm was achieved. A proof of principle experiment was performed by recording the cavity enhanced absorption spectrum of the weak b-X (1?0) transition of molecular oxygen at 14529 cm-1 and… CONTINUE READING

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