Compact Biocompatible Fiber Optic Temperature Microprobe Using DNA-Based Biopolymer

Seongjing Hong, Woohyun Jung, Taeoh Kim, Kyunghwan Oh

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A highly compact biocompatible microprobe type fiber optic temperature sensor was experimentally demonstrated utilizing an inherently high thermo-optic coefficient of DNA biopolymer. The sensor was based on an all-fiber multimode interferometer (MMI) along a coreless silica fiber (CSF) spliced to an end of a single mode fiber. Au film was deposited the CSF end facet to provide a double path for MMI and it also worked as a probe terminal. The circumferential area of CSF was coated with DNA-cetyltrimethylammonium chloride (CTMA) thin solid film, which served as a temperature sensing head. We experimentally investigated thermo-optical properties of DNA-CTMA thin solid films to find its large negative thermo-optical coefficient -4.15 × 10-4/°C in the temperature range from 20 to 70 °C. DNA-CTMA coated fiber optic probe was immersed in a water bath to simulate the bio compatible environment whose temperature was varied in the range from 30 to 70 °C. The proposed sensor showed a high-temperature sensitivity of -0.22 nm/°C in the spectral shifts, and 0.085 dB/°C in the reflected optical power changes. The proposed probe can be readily applied in various types of in vivo point of care temperature monitoring.

Original languageEnglish
Pages (from-to)974-978
Number of pages5
JournalJournal of Lightwave Technology
Volume36
Issue number4
DOIs
Publication statusPublished - 2018 Feb 15

Fingerprint

biopolymers
fiber optics
deoxyribonucleic acid
fibers
chlorides
silicon dioxide
probes
interferometers
temperature
sensors
temperature sensors
coefficients
flat surfaces
baths
optics
optical properties
shift
water

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Hong, Seongjing ; Jung, Woohyun ; Kim, Taeoh ; Oh, Kyunghwan. / Compact Biocompatible Fiber Optic Temperature Microprobe Using DNA-Based Biopolymer. In: Journal of Lightwave Technology. 2018 ; Vol. 36, No. 4. pp. 974-978.
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Compact Biocompatible Fiber Optic Temperature Microprobe Using DNA-Based Biopolymer. / Hong, Seongjing; Jung, Woohyun; Kim, Taeoh; Oh, Kyunghwan.

In: Journal of Lightwave Technology, Vol. 36, No. 4, 15.02.2018, p. 974-978.

Research output: Contribution to journalArticle

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