Simultaneous Measurement of Humidity and Temperature with Cytop-reduced Graphene Oxide-overlaid Two-mode Optical Fiber Sensor
- Authors
- Le, Anh Duy Duong; Hwang, Juil; Yusuf, Mohammad; Park, Kang Hyun; Park, Sungkyun; Kim, Jaeyong
- Issue Date
- Nov-2019
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Two-mode microfiber; Knot resonator; Response time; Recovery time; Relative humidity; Simultaneous measurement
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.298, pp.1 - 9
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 298
- Start Page
- 1
- End Page
- 9
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/146819
- DOI
- 10.1016/j.snb.2019.126841
- ISSN
- 0925-4005
- Abstract
- A polymer-overlaid two-mode microfiber knot resonator (TMM-KR) was designed to measure relative humidity (RH) and temperature simultaneously in a living condition. The device is composed of two main optical features: two-mode microfiber (TMM, slow-varying term) and two-mode knot resonator (TM-KR, fast-varying term). After fabricating a TMM by non-adiabatically tapering a conventional single mode fiber (SMF), we designed C-rGO-overlaid TMM as a polymer-overlaid optical sensor to evaluate the response and recovery times. The effective group refractive index between fundamental and cladding modes, HE11 and HE12, respectively, of the TMM-KR reduced to nearly zero by optimizing the waist diameter of the optical microfiber, and the sensitivities of the proposed sensor remarkably enhanced to 0.603 nm/%, and -0.79 nm/degrees C, for RH and temperature, respectively. Our calculated and experimental results demonstrated that the proposed micro-structure of the C-rGO-overlaid TMM-KR will provide optical properties that can be applied for practical use of environment sensing.
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