Evanescent-wave photoacoustic spectroscopy with optical micro/nano fibers.

نویسندگان

  • Yingchun Cao
  • Wei Jin
  • Lut Hoi Ho
  • Zhibo Liu
چکیده

We demonstrate gas detection based on evanescent-wave photoacoustic (PA) spectroscopy with tapered optical fibers. Evanescent-field instead of open-path absorption is exploited for PA generation, and a quartz tuning fork is used for PA detection. A tapered optical fiber with a diameter down to the wavelength scale demonstrates detection sensitivity similar to an open-path system but with the advantages of easier optical alignment, smaller insertion loss, and multiplexing capability.

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عنوان ژورنال:
  • Optics letters

دوره 37 2  شماره 

صفحات  -

تاریخ انتشار 2012