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Detection of chemicals using a novel fiber-optic sensor element built in fiber loop ring-resonators
We developed an evanescent field access block (EAB) sensor with an etched single mode fiber, fabricated with a core diameter of 8μm and reduced cladding diameter down to 11μm by hydrofluoric acid (HF) etching technique. Here, we describe the manufacturing process of the packaged sensor block and dem...
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Published in: | Sensors and actuators. B, Chemical Chemical, 2015-01, Vol.206, p.327-335 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | We developed an evanescent field access block (EAB) sensor with an etched single mode fiber, fabricated with a core diameter of 8μm and reduced cladding diameter down to 11μm by hydrofluoric acid (HF) etching technique. Here, we describe the manufacturing process of the packaged sensor block and demonstrate that the sensor is able to detect sample absorption and refractive index (RI) changes. The sensor is tested with different chemical solutions such as ethylenediamine (EDA), dimethyl sulfoxide (DMSO) and ethanol (C2H5OH).
At the same time, we fabricated (at CSIR-CGCRI) high quality optical fiber couplers having low splitting ratios (99.5:0.5%), which we used to build a 4m long optical evanescent-wave fiber ring cavity with an embedded EAB. After a careful analysis of the fiber loop characteristics, we performed cavity ring-down measurements in order to detect the presence of liquid samples on the EAB. |
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ISSN: | 0925-4005 1873-3077 |
DOI: | 10.1016/j.snb.2014.09.024 |