Highly-sensitive optical fiber temperature sensors based on PDMS/silica hybrid fiber structures

Gao, Han; Hu, Haifeng; Zhao, Yong; Li, Jin; Lei, Ming; Zhang, Yong

doi:10.1016/j.sna.2018.10.011

Cited by 59 publications

(23 citation statements)

References 26 publications

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“…Importantly, the core factors in optogenetics include the optical properties of the devices, the intrinsic biomaterials and the fabrication process of devices. Usual stiff inorganic materials such as silicon [ 140 , 141 ], silica [ 142 ] and metals [ 143 ] can be structured into fiber, needle, film or probe to be inserted into tissues. However, the high rigidity of these devices may cause damage to surrounding tissues.…”

Section: Photomedicine Based On Biocompatible Optical Devicesmentioning

confidence: 99%

Optical Waveguides and Integrated Optical Devices for Medical Diagnosis, Health Monitoring and Light Therapies

Wang

Dong

2020

Sensors

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Optical waveguides and integrated optical devices are promising solutions for many applications, such as medical diagnosis, health monitoring and light therapies. Despite the many existing reviews focusing on the materials that these devices are made from, a systematic review that relates these devices to the various materials, fabrication processes, sensing methods and medical applications is still seldom seen. This work is intended to link these multidisciplinary fields, and to provide a comprehensive review of the recent advances of these devices. Firstly, the optical and mechanical properties of optical waveguides based on glass, polymers and heterogeneous materials and fabricated via various processes are thoroughly discussed, together with their applications for medical purposes. Then, the fabrication processes and medical implementations of integrated passive and active optical devices with sensing modules are introduced, which can be used in many medical fields such as drug delivery and cardiovascular healthcare. Thirdly, wearable optical sensing devices based on light sensing methods such as colorimetry, fluorescence and luminescence are discussed. Additionally, the wearable optical devices for light therapies are introduced. The review concludes with a comprehensive summary of these optical devices, in terms of their forms, materials, light sources and applications.

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Section: Photomedicine Based On Biocompatible Optical Devicesmentioning

confidence: 99%

Optical Waveguides and Integrated Optical Devices for Medical Diagnosis, Health Monitoring and Light Therapies

Wang

Dong

2020

Sensors

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“…In order to give the fiber structure greater mechanical strength, a segment of hollow core fiber (HCF) filled with PDMS can be connected within the sensor [ 29 ]. In a similar fiber optic structure, two air chambers are added to both ends of the PDMS [ 30 ]. At the same temperature change, the PDMS size has the potential to change even more, making it possible for the fiber to achieve higher sensitivity.…”

Section: Sensors Coated With the Pdmsmentioning

confidence: 99%

“… The sensors were filled with PDMS: ( a ) D-shaped fiber coated with PDMS [ 28 ]; ( b ) Hollow core fiber filled with PDMS [ 29 ]; ( c ) Hollow core fiber filled with air gap-PDMS-air gap [ 30 ]. …”

Section: Figurementioning

confidence: 99%

A Review of Coating Materials Used to Improve the Performance of Optical Fiber Sensors

Yang

Wang

et al. 2020

Sensors

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In order to improve the performance of fiber sensors and fully tap the potential of optical fiber sensors, various optical materials have been selectively coated on optical fiber sensors under the background of the rapid development of various optical materials. On the basis of retaining the original characteristics of the optical fiber sensors, the coated sensors are endowed with new characteristics, such as high sensitivity, strong structure, and specific recognition. Many materials with a large thermal optical coefficient and thermal expansion coefficients are applied to optical fibers, and the temperature sensitivities are improved several times after coating. At the same time, fiber sensors have more intelligent sensing capabilities when coated with specific recognition materials. The same/different kinds of materials combined with the same/different fiber structures can produce different measurements, which is interesting. This paper summarizes and compares the fiber sensors treated by different coating materials.

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“…The sensor's resolution for the temperature, pressure and liquid parameter sensing sensitivity can reach 0.07 °C, 6 kPa and 3.0 × 10 −4 RIU, respectively. Gao et al proposed a high-sensitivity temperature sensor based on the principle of mode interference [17]. The sensor is formed by welding a single-mode fiber to a fiber tube and filling the end face of the fiber tube with PDMS to form an F-P air microbubble.…”

Section: Structure and Principle Of Sensormentioning

confidence: 99%

An Optimized PDMS Thin Film Immersed Fabry-Perot Fiber Optic Pressure Sensor for Sensitivity Enhancement

Luo

Liu

et al. 2019

Coatings

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To effectively control the critical thickness of a polydimethylsiloxane (PDMS) film and enhance the sensitivity characteristics of the fiber pressure sensor, we propose a new method to optimize the thickness of the PDMS film in a fiber tube. It is characterized by analyzing the relationship between the diffusion rate of the PDMS and its viscosity, and using an oven to solidify the PDMS to a certain extent to accurately control the diffusion rate and diffusion length of the PDMS in the fiber tube. We also used multiple transfer methods to control the volume of the PDMS in the fiber tube to minimize the thickness of the formed PDMS film. Fabry-Perot interference occurs when the surface of the PDMS film layer filled into the fiber tube and the adjacent single mode fiber/fiber tube form a joint surface. This method forms a new fiber-optic Fabry-Perot pressure sensor that is very sensitive to external pressure parameters. The experimental results show that the optimized film thickness will be reduced to an order of 20 μm. Correspondingly, the fiber-optic pressure sensor has a sensitivity of up to 100 pm/kPa, which is about 100 times that reported in the literature. The structure also has better resistance to temperature interference. To our knowledge, this is the first in-depth study of the effects of the PDMS viscosity coefficient, diffusion rate, and fiber pressure sensitivity in fiber. The film thickness optimization method has some advantages, including a low cost, good controllability, and good application value in high sensitivity pressure and sound wave detection.

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Highly-sensitive optical fiber temperature sensors based on PDMS/silica hybrid fiber structures

Cited by 59 publications

References 26 publications

Optical Waveguides and Integrated Optical Devices for Medical Diagnosis, Health Monitoring and Light Therapies

Optical Waveguides and Integrated Optical Devices for Medical Diagnosis, Health Monitoring and Light Therapies

A Review of Coating Materials Used to Improve the Performance of Optical Fiber Sensors

An Optimized PDMS Thin Film Immersed Fabry-Perot Fiber Optic Pressure Sensor for Sensitivity Enhancement

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