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 continu...
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| Published in: | Chemical physics letters Vol. 383; no. 3; pp. 297 - 303 |
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| Main Authors: | , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
Elsevier B.V
01-01-2004
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| Online Access: | Get full text |
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| Summary: | 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. |
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| ISSN: | 0009-2614 1873-4448 |
| DOI: | 10.1016/j.cplett.2003.11.043 |