Research on NCF-PCF-NCF Structure Interference Characteristic for Temperature and Relative Humidity Measurement

Zhang, Jietong; Tong, Zhengrong; Zhang, Weihua; Zhao, Yang; Liu, Yixi

doi:10.1109/jphot.2021.3105395

Cited by 7 publications

(4 citation statements)

References 22 publications

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“…Rsoft is an optical waveguide simulation software with a variety of algorithm modules. Compared with other optical simulation software, its light intensity is directly monitored, the mode field distribution is more intuitive, and it is easier to debug the results [31,32]. The structure was simulated by using the BeamPRoP module of Rsoft in order to observe the propagation path of light in the SMF-PCF-SMF (SPS) structure.…”

Section: Sensing System and Principlementioning

confidence: 99%

High temperature and strain dual-parameters fiber sensing based on intermodal interference and femtosecond laser fabricated fiber Bragg grating

Li¹,

He²,

Tan³

et al. 2023

Phys. Scr.

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In this paper, the sensor was proposed by combination of grapefruit photonic crystal fiber (GPCF) and femtosecond laser fabricated fiber Bragg grating (FBG) based on Sagnac interferometer. The GPCF was sandwiched between two single-mode fibers (SMFS) to form a SMF-GPCF-SMF structure, which was based on intermodal interference. The FBG with a central wavelength of 1535.32 nm was inscribed through polyimide coating and cladding by the femtosecond laser point-by-point inscribing method. The spectrum drift data of sensing structure were collected and the dual-parameters matrix of temperature-strain was constructed to realize the simultaneous measurement of temperature and strain. The experimental results showed that the linear range of the strain measurement was from 0 με to 2,000 με at different temperature, the wavelength of FBG and GPCF was red drift and blue drift, respectively, the average strain sensitivity at different temperature was 1.25 pm/με and -2.05 pm/με, all the linearity R2 are higher than 0.999, and has the high repeatability. The linear range of temperature measurement was from 20 ℃ to 450 ℃, the wavelength of FBG and GPCF was red drift and blue drift, respectively, the temperature sensitivity of FBG and GPCF was 15.17 pm/℃ and -8.87 pm/℃, the linearity was 0.99983 and 0.99989, respectively.

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Section: Sensing System and Principlementioning

confidence: 99%

High temperature and strain dual-parameters fiber sensing based on intermodal interference and femtosecond laser fabricated fiber Bragg grating

Li¹,

He²,

Tan³

et al. 2023

Phys. Scr.

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“…With increasing attention to meteorology, agriculture, industry, and indoor environments, the importance of humidity sensors has become more prominent. Fiber optic humidity sensors have been proposed, such as humidity sensors based on FBG [92,93], longperiod fiber gratings (LPFG) [94,95], MZI [96,97], and Michelson interferometers [98,99]. Polymethyl methacrylate (PMMA) is a commonly used synthetic polymer, also known as acrylic or organic glass, which can absorb or release moisture, causing volume changes.…”

Section: Humidity Sensormentioning

confidence: 99%

A Review of Optical Fiber Sensing Technology Based on Thin Film and Fabry–Perot Cavity

Ma,

Peng,

Bai

et al. 2023

Coatings

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Fiber sensors possess characteristics such as compact structure, simplicity, electromagnetic interference resistance, and reusability, making them widely applicable in various practical engineering applications. Traditional fiber sensors based on different microstructures solely rely on the thermal expansion effect of silica material itself, limiting their usage primarily to temperature or pressure sensing. By employing thin film technology to form Fabry–Perot (FP) cavities on the end-face or inside the fiber, sensitivity to different physical quantities can be achieved using different materials, and this greatly expands the application range of fiber sensing. This paper provides a systematic introduction to the principle of FP cavity fiber optic sensors based on thin film technology and reviews the applications and development trends of this sensor in various measurement fields. Currently, there is a growing need for precise measurements in both scientific research and industrial production. This has led to an increase in the variety of structures and sensing materials used in fiber sensors. The thin film discussed in this paper, suitable for various types of sensing, not only applies to fiber optic FP cavity sensors but also contributes to the research and advancement of other types of fiber sensors.

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“…The FSR is obtained as inversely proportional to the length of the sensing structure. Let the light field input from the SMF be E(r, 0), and the morder mode in the NCF be Fm (r), at the input SMF and NCF1 connection [11]:…”

Section: B Sensing Principlementioning

confidence: 99%

Application of microstructured fiber sensor in the field of temperature detection

Yang

Shen

Feng

et al. 2022

ESS

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A fiber temperature sensor based on no core fiber-few mode fiber-no core fiber (NCF-FMF-NCF) is proposed. It consists of two segments of NCF and a segment of FMF, with the NCF fused at both ends of the FMF. Meanwhile, the lengths of the NCF and FMF were optimized by simulation simulations and experimental validation. The results show that the sensor has a high sensitivity to the external refractive index (RI) changes, and enables a wide range of ambient temperature measurement. A sensitivity of 0.09445nm/? was obtained in a temperature range of 25-70?. The sensor has the advantages of high stability, good linear fit and simple structure.

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Research on NCF-PCF-NCF Structure Interference Characteristic for Temperature and Relative Humidity Measurement

Cited by 7 publications

References 22 publications

High temperature and strain dual-parameters fiber sensing based on intermodal interference and femtosecond laser fabricated fiber Bragg grating

High temperature and strain dual-parameters fiber sensing based on intermodal interference and femtosecond laser fabricated fiber Bragg grating

A Review of Optical Fiber Sensing Technology Based on Thin Film and Fabry–Perot Cavity

Application of microstructured fiber sensor in the field of temperature detection

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