Detection of Aflatoxin B1 in Food Based on SMF Taper Combined With Fiber Loop Ring Down Technique

In this paper, a fiber sensing system combined with fiber loop ring down (FLRD) technique to detect aflatoxin B 1 (AFB 1 ) in food is proposed. The single-mode fiber (SMF) taper was set as the sensor head, and the waist diameter of it was determined to be 17.1 μm by the refractive index (RI) measure...

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Bibliographic Details
Published in:IEEE sensors journal 2020-03, Vol.20 (5), p.2446-2451
Main Authors: Chen, Wenwei, Zhao, Chunliu, Mao, Bangning, Chen, Huifang, Shen, Changyu
Format: Article
Language:English
Subjects:
Aflatoxin B
Aflatoxins
Couplers
Diameters
fiber loop ring down
fiber sensing
fiber taper
Fitting
Food
Light sources
Optical fiber couplers
Optical fiber sensors
Refractivity
Sensor systems
Sensors
Tapering
Variations
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Summary:In this paper, a fiber sensing system combined with fiber loop ring down (FLRD) technique to detect aflatoxin B 1 (AFB 1 ) in food is proposed. The single-mode fiber (SMF) taper was set as the sensor head, and the waist diameter of it was determined to be 17.1 μm by the refractive index (RI) measurement experiments. When a light pulse enters and circulates in the fiber loop, it experiences a little loss each time as it passes through the sensor head. The ring-down time of the system would be altered by intensity loss near the sensor head, which is related to the concentration of the AFB 1 solution. The experimental results showed that the sensitivity of AFB 1 was -0.755 μ s/(μg/ml) in the concentration range of 0-5 μ g/ml with a precision of 0.016 μg/ml. Compared with other AFB 1 sensors, the system has the advantages of simple structure, low cost, fast response and insensitive to light source fluctuation.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2019.2950939