Agarose coated micro-bottle sensor for relative humidity detection

Huda Adnan Zain; Malathy Batumalay; Md Ashadi Md Johari; Kaharudin Dimyati; Sulaiman Wadi Harun

doi:10.1007/s11801-021-0142-2

Agarose coated micro-bottle sensor for relative humidity detection

Huda Adnan Zain, Malathy Batumalay, Md Ashadi Md Johari, Kaharudin Dimyati, Sulaiman Wadi Harun^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The whispering gallery mode (WGM) based micro-bottle resonator (MBR) sensor has been proposed and demonstrated for relative humidity measurement by using an agarose gel as a transducer. MBR was fabricated by using a soften-and-compress method to form a 190 µm bulge bottle. The micro-bottle was optically excited by a 3 µm tapered fiber and it exhibits a resonance with a Q factor in an order of 10⁵. The agarose coated MBR produces a good sensing response towards humidity with the sensitivity of 0.107 dB/%RH and linearity of 99.614%. The agarose hydrophilic nature and its changing porosity and refractive index with increasing relative humidity made the coated MBR structure to be more sensitive than the uncoated structure. This humidity sensor has a simple fabrication and is showing good sensitivity, linearity, resolution, response time and operational in a wide humidity range.

Original language	English
Pages (from-to)	328-333
Number of pages	6
Journal	Optoelectronics Letters
Volume	17
Issue number	6
DOIs	https://doi.org/10.1007/s11801-021-0142-2
State	Published - Jun 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2021, Tianjin University of Technology.

Keywords

A

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1007/s11801-021-0142-2

Cite this

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title = "Agarose coated micro-bottle sensor for relative humidity detection",

abstract = "The whispering gallery mode (WGM) based micro-bottle resonator (MBR) sensor has been proposed and demonstrated for relative humidity measurement by using an agarose gel as a transducer. MBR was fabricated by using a soften-and-compress method to form a 190 µm bulge bottle. The micro-bottle was optically excited by a 3 µm tapered fiber and it exhibits a resonance with a Q factor in an order of 105. The agarose coated MBR produces a good sensing response towards humidity with the sensitivity of 0.107 dB/\%RH and linearity of 99.614\%. The agarose hydrophilic nature and its changing porosity and refractive index with increasing relative humidity made the coated MBR structure to be more sensitive than the uncoated structure. This humidity sensor has a simple fabrication and is showing good sensitivity, linearity, resolution, response time and operational in a wide humidity range.",

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doi = "10.1007/s11801-021-0142-2",

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AU - Zain, Huda Adnan

AU - Batumalay, Malathy

AU - Johari, Md Ashadi Md

AU - Dimyati, Kaharudin

AU - Harun, Sulaiman Wadi

PY - 2021/6

Y1 - 2021/6

N2 - The whispering gallery mode (WGM) based micro-bottle resonator (MBR) sensor has been proposed and demonstrated for relative humidity measurement by using an agarose gel as a transducer. MBR was fabricated by using a soften-and-compress method to form a 190 µm bulge bottle. The micro-bottle was optically excited by a 3 µm tapered fiber and it exhibits a resonance with a Q factor in an order of 105. The agarose coated MBR produces a good sensing response towards humidity with the sensitivity of 0.107 dB/%RH and linearity of 99.614%. The agarose hydrophilic nature and its changing porosity and refractive index with increasing relative humidity made the coated MBR structure to be more sensitive than the uncoated structure. This humidity sensor has a simple fabrication and is showing good sensitivity, linearity, resolution, response time and operational in a wide humidity range.

AB - The whispering gallery mode (WGM) based micro-bottle resonator (MBR) sensor has been proposed and demonstrated for relative humidity measurement by using an agarose gel as a transducer. MBR was fabricated by using a soften-and-compress method to form a 190 µm bulge bottle. The micro-bottle was optically excited by a 3 µm tapered fiber and it exhibits a resonance with a Q factor in an order of 105. The agarose coated MBR produces a good sensing response towards humidity with the sensitivity of 0.107 dB/%RH and linearity of 99.614%. The agarose hydrophilic nature and its changing porosity and refractive index with increasing relative humidity made the coated MBR structure to be more sensitive than the uncoated structure. This humidity sensor has a simple fabrication and is showing good sensitivity, linearity, resolution, response time and operational in a wide humidity range.

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Agarose coated micro-bottle sensor for relative humidity detection

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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