18 April 2017 pH-responsive hydrogel coated fiber Bragg grating-based chemo mechanical sensor bioreactor applications
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Proceedings Volume 10251, Biomedical Imaging and Sensing Conference; 1025120 (2017) https://doi.org/10.1117/12.2270474
Event: SPIE Technologies and Applications of Structured Light, 2017, Yokohama, Japan
Abstract
This paper describes a fiber optics based pH sensor by using wavelength modulated techniques. Fiber Bragg grating (FBG) is functionalized with a stimulus responsive hydrogel which induces a strain on FBG due to mechanical expansion of the gel in response to ambient pH changes. The gel is synthesized from the blends of Poly (vinyl alcohol)/Poly (acrylic acid). The induced strain results in a shift of FBG reflected peak which is monitored by an interrogator. The sensor system shows a good linearity in acidic pH range of 3 to 7 with a sensitivity of 12.16pm/pH. Besides that it shows good repeatability which proves it to be fit for pH sensing applications.
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V. N. Kishore P., Sai Shankar M., "pH-responsive hydrogel coated fiber Bragg grating-based chemo mechanical sensor bioreactor applications", Proc. SPIE 10251, Biomedical Imaging and Sensing Conference, 1025120 (18 April 2017); doi: 10.1117/12.2270474; https://doi.org/10.1117/12.2270474
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