Evanescent-wave photoacoustic spectroscopy with optical micro/nano fibers

Yingchun Cao, Wei Jin, Lut Hoi Ho, Zhibo Liu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

57 Citations (Scopus)


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.
Original languageEnglish
Pages (from-to)214-216
Number of pages3
JournalOptics Letters
Issue number2
Publication statusPublished - 15 Jan 2012

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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