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Title: Monitoring surface crystal growth using an intrinsic exposed-core optical fiber sensor (IECOFS)
Contributor(s): Lamb, David (author); Boerkamp, Martijn (author); Lye, Peter (author)orcid 
Publication Date: 2008
DOI: 10.1117/12.785932
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Abstract: An unclad section of silica optical fiber has been used to detect, and measure heterogeneous (surface) crystal growth in a solution of calcium carbonate. Surface crystal growth is found to attenuate radiation transmitted along the fiber core via the refraction of guided modes out of the core. Optical power output was found to be linearly correlated with crystal size (R² = 0.97, n = 9) and the optical signal was found to be restored following chemical removal of deposited crystals (without physical intervention). Sensitivity to crystal growth was found to be proportional to the length of the unclad (exposed) core and inversely-proportional to fiber diameter. These results suggest a simple skip-length ray model, coupled with refraction of guided modes out of the fiber core can be invoked to explain the mechanism of optical power attenuation.
Publication Type: Conference Publication
Conference Name: OFS-19: 19th International Conference on Optical Fibre Sensors (OFS), Perth, Australia, 14th - 18th April, 2008
Source of Publication: Proceedings of SPIE, v.7004, p. 700424-1-700424-4
Publisher: SPIE: International Society for Optical Engineering
Place of Publication: Bellingham, United States of America
ISSN: 0277-786X
Field of Research (FOR): 020501 Classical and Physical Optics
Peer Reviewed: Yes
HERDC Category Description: E1 Refereed Scholarly Conference Publication
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