High sensitivity balloon-like interferometric optical fiber humidity sensor based on tuning gold nanoparticles coating thickness

Al-Hayali, Sarah Kadhim; Salman, Ansam M.; Al‐Janabi, Abdulhadi

doi:10.1016/j.measurement.2020.108703

Cited by 28 publications

(5 citation statements)

References 40 publications

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“…Depending on the environmental parameter that needs to be sensed, different materials can be coated on the surface of the sensors. For example, a humidity sensor was demonstrated utilizing an interferometer structure that is coated by gelatin [ 69 ], gold nanoparticles [ 70 ], or a thin film of tin oxide [ 71 ] working as sensitive materials to improve the value of

. In addition, a high-sensitive temperature sensor can be coated with a material with a high thermal-optic coefficient such as a film of polydimethylsiloxane [ 72 ] or deionized water [ 73 ].…”

Section: Interferometer-based Sensorsmentioning

confidence: 99%

A Review of Sensitivity Enhancement in Interferometer-Based Fiber Sensors

Wen

Guan

Dong

et al. 2022

Sensors

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Optical fiber sensors based on an interferometer structure play a significant role in monitoring physical, chemical, and biological parameters in natural environments. However, sensors with high-sensitivity measurement still present their own challenges. This paper deduces and summarizes the methods of sensitivity enhancement in interferometer based fiber optical sensors, including the derivation of the sensing principles, key characteristics, and recently-reported applications.The modal coupling interferometer is taken as an example to derive the five terms related to the sensitivity: (1) the wavelength-dependent difference of phase between two modes/arms ∂ϕd/∂λ, (2) the sensor length Lw,A, (3) refractive index difference between two modes/arms Δneff,A, (4) sensing parameter dependent length change α, and (5) sensing parameter dependent refractive index change γ. The research papers in the literature that modulate these terms to enhance the sensing sensitivity are reviewed in the paper.

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. In addition, a high-sensitive temperature sensor can be coated with a material with a high thermal-optic coefficient such as a film of polydimethylsiloxane [ 72 ] or deionized water [ 73 ].…”

Section: Interferometer-based Sensorsmentioning

confidence: 99%

A Review of Sensitivity Enhancement in Interferometer-Based Fiber Sensors

Wen

Guan

Dong

et al. 2022

Sensors

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“…During the whole transmission process, the inter-mode interference will occur due to the difference in the effective RI and optical path between the core and cladding modes. Thus, the intensity of the transmission spectrum can be written as [5], [22]:…”

Section: Structure Design and Measurement Principlementioning

confidence: 99%

High-Sensitivity Liquid Level Sensor Based on the Balloon-Shaped Fiber Optic MZI

et al. 2022

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We demonstrated a high-sensitivity liquid level sensor based on the balloon-shaped fiber Mach-Zehnder interferometer (MZI). To make an optical fiber MZI sensor, a bare single mode fiber (SMF) is bent into a balloon shape. The sensor is attached to a stiff support and linked to a buoyancy ball floating on the liquid surface via a thin thread. The change in liquid level will bend the fiber and lead to a wavelength shift of transmission spectrum. This is a novel method of measuring liquid levels. We comprehensively studied the sensing performance of the sensor, and applied the ridge regression algorithm to optimize the fitting results of the experimental data. The maximum sensitivity of liquid level and temperature are 5.245 nm/mm and 40.3 pm/°C respectively, and the sensor has a low temperature cross-sensitivity of 0.00768 mm/°C. Furthermore, the sensor has the advantages of real-time response, convenient manufacture, low cost and high reliability, which broadens the application area of balloon-shaped MZI and makes it appropriate for liquid level sensing.

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“…Sarah Kadhim Al-Hayali et al [ 198 ] proposed and demonstrated a balloon-configuration fiber-optic probe involving bent SMF with polymer outlayer and gold nanoparticles coating. The sensing mechanism was reported to be modal interference, though it is also possible that LSPR contributed to the observed transmittance spectra.…”

Section: Literature and The State-of-the-artmentioning

confidence: 99%

Review of Optical Humidity Sensors

Rao

Zhao

et al. 2021

Sensors

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Optical humidity sensors have evolved through decades of research and development, constantly adapting to new demands and challenges. The continuous growth is supported by the emergence of a variety of optical fibers and functional materials, in addition to the adaptation of different sensing mechanisms and optical techniques. This review attempts to cover the majority of optical humidity sensors reported to date, highlight trends in design and performance, and discuss the challenges of different applications.

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High sensitivity balloon-like interferometric optical fiber humidity sensor based on tuning gold nanoparticles coating thickness

Cited by 28 publications

References 40 publications

A Review of Sensitivity Enhancement in Interferometer-Based Fiber Sensors

A Review of Sensitivity Enhancement in Interferometer-Based Fiber Sensors

High-Sensitivity Liquid Level Sensor Based on the Balloon-Shaped Fiber Optic MZI

Review of Optical Humidity Sensors

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