Strain, bending, refractive index independent temperature sensor based on a graded index multimode fiber embedded long period fiber grating

Article Engineering, Multidisciplinary

Study on the performance of polarization maintaining fiber temperature sensor based on tilted fiber grating

Jun Zhao et al.

Summary: The novel fiber temperature sensor offers higher accuracy and resolution, better integration and reliability, suitable for precise temperature measurement in high voltage and strong magnetic field environments.

MEASUREMENT (2021)

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Article Engineering, Electrical & Electronic

High Torsion Sensitivity Sensor Based on LPFG With Unique Geometric Structure

Chupeng Lu et al.

Summary: This paper presents a sensor with high torsion sensitivity, using a unique LPFG structure prepared by CO2 laser polishing and etching methods. Experimental results show that the sensor has high torsion sensitivity within a range of -10.5 rad/m to 10.5 rad/m, with a significant increase in sensitivity after etching V-shaped grooves. The sensor also exhibits a temperature sensitivity of 50 pm/°C within the range of 30-150 °C.

IEEE SENSORS JOURNAL (2021)

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Article Chemistry, Analytical

Refractive Index Sensors Based on Long-Period Grating in a Negative Curvature Hollow-Core Fiber

Hanna Izabela Stawska et al.

Summary: This study investigates the potential of utilizing negative curvature hollow-core fibers (NCHCFs) in combination with long-period optical fiber gratings (LPGs) for refractive index (RI) sensing. The results show that the NCHCF-based LPGs have lower sensitivities compared to NCHCFs alone.

SENSORS (2021)

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Article Chemistry, Physical

Simultaneous Measurement of Temperature and Refractive Index Using High Temperature Resistant Pure Quartz Grating Based on Femtosecond Laser and HF Etching

Na Zhao et al.

Summary: The study developed a dual-parameter sensor based on FBG, which can simultaneously measure temperature and refractive index, achieving precise measurements of high temperature and refractive index, showing great potential in acupuncture treatment.

MATERIALS (2021)

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Article Optics

Sensitivity-enhanced temperature sensor based on encapsulated S-taper fiber Modal interferometer

Jianwen Ma et al.

Summary: The study presented a highly sensitive temperature sensor based on an S-shape fiber taper Mach-Zehnder interferometer, without the need for special fibers or micromachining techniques. By encapsulating an S-shape single mode fiber taper in a capillary filled with high thermos-optic coefficient liquid, a maximum sensitivity of -15.66 nm/degrees C was achieved. The sensor demonstrated simple configuration, ease of fabrication, robustness, and low cost, making it suitable for high sensitivity temperature sensing applications.

OPTICS AND LASER TECHNOLOGY (2021)

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Article Physics, Multidisciplinary

A highly-sensitive temperature sensor based on GeO2-SiO2 long period fiber grating

Mohammad Lotfi et al.

Summary: The highly-sensitive long period grating temperature sensor, composed of GeO2 in the core and SiO2 in the cladding, provides high temperature sensitivity due to the thermo-optic coefficient contrast. By considering material dispersion and optimizing the structure, the sensor is feasible with low cost, high sensitivity, large detection range, and large operating wavelength range, suitable for applications in toxic, unreachable, and far distant environments such as in temperature control of lasers and in oil or gas industries.

PHYSICA SCRIPTA (2021)

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Article Chemistry, Multidisciplinary