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Applied Optics

Applied Optics


  • Vol. 36, Iss. 34 — Dec. 1, 1997
  • pp: 8992–8998

Low-loss liquid-core optical fiber for low-refractive-index liquids: fabrication, characterization, and application in Raman spectroscopy

R. Altkorn, I. Koev, R. P. Van Duyne, and M. Litorja  »View Author Affiliations

Applied Optics, Vol. 36, Issue 34, pp. 8992-8998 (1997)

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We describe a liquid-core optical fiber based on capillary tubing of Teflon AF 2400, which is a clear, amorphous fluoropolymer having a refractive index of 1.29. When filled with virtually any transparent liquid, the fiber is capable of transmitting light by total internal reflection. Loss below 3 dB/m is demonstrated throughout much of the visible region for a 250-mm-i.d. fiber filled with water. The utility of this device in enhancing the intensity of Raman spectra of core liquids is demonstrated.

© 1997 Optical Society of America

Original Manuscript: March 10, 1997
Revised Manuscript: August 18, 1997
Published: December 1, 1997

R. Altkorn, I. Koev, R. P. Van Duyne, and M. Litorja, "Low-loss liquid-core optical fiber for low-refractive-index liquids: fabrication, characterization, and application in Raman spectroscopy," Appl. Opt. 36, 8992-8998 (1997)

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