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Blood pH optrode based on evanescent waves and refractive index change
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.ORCID iD: 0000-0003-1967-4016
Uppsala University, Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, Sweden .
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.ORCID iD: 0000-0002-3790-0729
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
2014 (English)In: Progress in Biomedical Optics and Imaging - Proceedings of SPIE, 2014, Art. no. 89381F- p.Conference paper, Published paper (Refereed)
Abstract [en]

Sensing pH in blood with an silica multimode optical fiber. This sensor is based on evanescent wave absorption and measures the change of the refractive index and absorption in a cladding made of a biocompatible Polymer. In contrast to many existing fiber optical sensors which are based upon different dyes or florescent material to sense the pH, here presents a solution where a part of the cladding is replaced with a Poly (β-amino ester) made of 1.4-Butanediol diacrylate, Piperazine, and Trimethylolpropane Triacrylate. Piperazine has the feature of changing its volume by swelling or shrinking in response to the pH level. This paper utilizes this dimension effect and measure the refractive index and the absorption of the cladding in respect to different pH-levels. The alteration of refractive index also causes a change in the absorption and therefore the output power changes as a function of the pH level. The sensor is sensitive to pH in a wide spectral range and light absorbency can be observed for wavelengths ranging from UV to far IR. © 2014 SPIE.

Place, publisher, year, edition, pages
2014. Art. no. 89381F- p.
Keyword [en]
Absorption, Blood, Evanescent wave, Hydrogel, Optical fiber, PH, Sensor
National Category
Medical Engineering Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-22047DOI: 10.1117/12.2040077ISI: 000334100600034Scopus ID: 2-s2.0-84897465448Local ID: STCISBN: 9780819498519 (print)OAI: oai:DiVA.org:miun-22047DiVA: diva2:720531
Conference
Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XIV, 1 February 2014 through 2 February 2014, San Francisco, CA
Note

Sponsors: The Society of Photo-Optical Instrumentation Engineers (SPIE)

Available from: 2014-05-30 Created: 2014-05-30 Last updated: 2017-03-06Bibliographically approved

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Hammarling, KristerNilsson, Hans-ErikManuilskiy, Anatoliy
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CiteExportLink to record
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