A newly compact bent tapered optical fibre sensor is proposed and demonstrated for the detection of levofloxacin concentration. The structure of micro fibre Mach-Zehnder interferometer (MMZI) is fabricated using a glass processing system, demonstrating a 30 mm-long single mode fibre between two tapered fibres which has a waist diameter of 15 pm and tapering length of 6 mm. A combination of bending and tapering acts as a sensor, which results in high penetration depth of evanescent field. The sensor is sensitive to concentration variation. Upon exposure to Levofloxacin concentrations varying from 50 to 250 ppm, the U-shaped MMZI sensor sensitivity is 21 pm/ppm and a linearity of more than 98.7%, which is about 1.49 fold greater than that of a straight MMZI sensor. In addition, the U-shaped MMZI sensor is very compact in size which make this type of fibre sensor is easily measuring concentration variation in small volume. (C) 2015 Elsevier GmbH. All rights reserved.
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Hong Kong Polytech Univ, Photon Res Ctr, Dept Elect & Informat Engn, Hung Hom, 11 Yuk Choi Rd, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Photon Res Ctr, Dept Elect & Informat Engn, Hung Hom, 11 Yuk Choi Rd, Hong Kong, Peoples R China
Al Noman, Abdullah
Dash, Jitendra Narayan
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Hong Kong Polytech Univ, Photon Res Ctr, Dept Elect Engn, Hung Hom, 11 Yuk Choi Rd, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Photon Res Ctr, Dept Elect & Informat Engn, Hung Hom, 11 Yuk Choi Rd, Hong Kong, Peoples R China
Dash, Jitendra Narayan
Cheng, Xin
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Hong Kong Polytech Univ, Photon Res Ctr, Dept Elect Engn, Hung Hom, 11 Yuk Choi Rd, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Photon Res Ctr, Dept Elect & Informat Engn, Hung Hom, 11 Yuk Choi Rd, Hong Kong, Peoples R China
Cheng, Xin
Tam, Hwa-Yam
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Hong Kong Polytech Univ, Photon Res Ctr, Dept Elect Engn, Hung Hom, 11 Yuk Choi Rd, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Photon Res Ctr, Dept Elect & Informat Engn, Hung Hom, 11 Yuk Choi Rd, Hong Kong, Peoples R China
Tam, Hwa-Yam
Yu, Changyuan
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Hong Kong Polytech Univ, Photon Res Ctr, Dept Elect & Informat Engn, Hung Hom, 11 Yuk Choi Rd, Hong Kong, Peoples R ChinaHong Kong Polytech Univ, Photon Res Ctr, Dept Elect & Informat Engn, Hung Hom, 11 Yuk Choi Rd, Hong Kong, Peoples R China
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Univ Malaya, Fac Engn, Dept Elect Engn, Kuala Lumpur 50603, MalaysiaUniv Malaya, Fac Engn, Dept Elect Engn, Kuala Lumpur 50603, Malaysia
Lokman, A.
Arof, H.
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Univ Malaya, Fac Engn, Dept Elect Engn, Kuala Lumpur 50603, MalaysiaUniv Malaya, Fac Engn, Dept Elect Engn, Kuala Lumpur 50603, Malaysia
Arof, H.
Harun, S. W.
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Univ Malaya, Fac Engn, Dept Elect Engn, Kuala Lumpur 50603, Malaysia
Univ Malaya, Photon Res Ctr, Kuala Lumpur 50603, MalaysiaUniv Malaya, Fac Engn, Dept Elect Engn, Kuala Lumpur 50603, Malaysia