Evanescent field absorption in a passive optical fiber resonator using continuous-wave cavity ring-down spectroscopy

We combine the sensitivity advantages of cavity ring-down spectroscopy (CRDS) with the versatility of optical fiber sensing technology in a spatially extended passive fiber ring resonator constructed of common telecommunications components. The resonator is characterized with both pulsed and continuous-wave diode laser excitation, and it is shown to be a practical device for direct measurement of loss in a fiber-optic system as well for CRDS sensing in liquids. We demonstrate a minimum detectable loss of 0.017% per √Hz and show near-infrared absorption of 1-octyne with a minimum detectable concentration of 0.049% per √Hz in non-interacting solvent at 1532.5 nm.

[1]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[2]  A. Mignani,et al.  Evanescent Wave Absorption Spectroscopy by Means of Bi-Tapered Multimode Optical Fibers , 1998 .

[3]  H. M. Heise,et al.  Novel developments in mid-IR fiber-optic spectroscopy for analytical applications , 2001 .

[4]  Anthony O'Keefe,et al.  Cavity-enhanced spectroscopy in optical fibers. , 2002, Optics letters.

[5]  Hans-Peter Loock,et al.  Fiber-loop ring-down spectroscopy , 2002 .

[6]  A. Kishen,et al.  Total protein measurement using a fiber-optic evanescent wave-based biosensor , 2004, Biotechnology Letters.

[7]  Kenneth W. Busch,et al.  Cavity-ringdown spectroscopy : an ultratrace-absorption measurement technique , 1999 .

[8]  Jeffrey W. Hudgens,et al.  Evanescent wave cavity ring-down spectroscopy for probing surface processes , 1997 .

[9]  A. O’Keefe,et al.  Cavity ring‐down optical spectrometer for absorption measurements using pulsed laser sources , 1988 .

[10]  Richard J. Black,et al.  Tapered single-mode fibres and devices. I. Adiabaticity criteria , 1991 .

[11]  D. Littlejohn,et al.  Bent Silica Fiber Evanescent Absorption Sensors for Near-Infrared Spectroscopy , 1999 .

[12]  Tomas Hirschfeld,et al.  Internal Reflection Spectroscopy , 1967 .

[13]  Miroslav Chomat,et al.  Investigation of fiber-optic evanescent-wave sensors for detection of liquid hydrocarbons , 1998 .

[14]  Andrew G. Glen,et al.  APPL , 2001 .

[15]  J. Winefordner,et al.  Monitoring atmospheric particulate matter through cavity ring-down spectroscopy. , 2002, Analytical chemistry.

[16]  Richard J. Black,et al.  Tapered single-mode fibres and devices. II. Experimental and theoretical quantification , 1991 .

[17]  Tuomo von Lerber,et al.  Cavity-ring-down principle for fiber-optic resonators: experimental realization of bending loss and evanescent-field sensing. , 2002, Applied optics.

[18]  K. Lehmann,et al.  Cavity ring‐down overtone spectroscopy of HCN, H13CN and HC15N , 1995 .

[19]  J. Max,et al.  1-Propanol hydrate by IR spectroscopy , 2002 .