A dual-parameter sensing system for temperature and curvature based on Nano-EYDF and in-line cascaded Mach-Zehnder interferometer

Optical fiber sensors based on tapered optical fiber (TOF) structure have attracted a considerable amount of attention from researchers due to the advantages of simple fabrication, high stability, and diverse structures, and have great potential for applications in many fields such as physics, chemistry, and biology. Compared with conventional optical fibers, TOF with their unique structural characteristics significantly improves the sensitivity and response speed of fiber-optic sensors and broadens the application range. This review presents an overview of the latest research status and characteristics of fiber-optic sensors and TOF sensors. Then, the working principle of TOF sensors, fabrication schemes of TOF structures, novel TOF structures in recent years, and the growing emerging application areas are described. Finally, the development trends and challenges of TOF sensors are prospected. The objective of this review is to convey novel perspectives and strategies for the performance optimization and design of TOF sensors based on fiber-optic sensing technologies.

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“…Hence, the mathematical formula for the free spectral range ( FSR ) of the interference spectrum can be approximately defined as [ 82 ]:

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Section: Theoretical Mechanism For Sensingmentioning

confidence: 99%

Advances in Tapered Optical Fiber Sensor Structures: From Conventional to Novel and Emerging

et al. 2023

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“…Especially in curvature measurement, the temperature crosstalk is the spotlight in the R&D of the optical fiber sensors [ 5 ]. Some researchers have focused on the temperature-insensitive sensors [ 6 , 7 ] and the compensation method based on a cascaded structure with a low-curvature sensitivity temperature sensor [ 8 ] for the curvature sensor design.…”

Section: Introductionmentioning

confidence: 99%

Angularly Cascaded Long-Period Fiber Grating for Curvature and Temperature Detection

Xiao,

Du,

Ling

et al. 2023

Sensors

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A high-sensitivity curvature sensor with dual-parameter measurement ability based on angularly cascaded long-period fiber grating (AC-LPFG) is proposed and experimentally demonstrated, which consists of two titled LPFGs (TLPFGs) with different tilt angles and the same grating period. AC-LPFG was fabricated by using a deep ultraviolet laser and an amplitude-mask in our laboratory. The experimental results show that simultaneous measurement of curvature and temperature can be achieved by monitoring the wavelengths of two resonant peaks for different TLPFGs. The two peaks show opposite shifts with increasing curvature and has a maximum curvature sensitivity of 16.392 nm/m−1. With the advantages of low cost, high sensitivity, and dual-parameter measurements, our sensor has more potential for engineering applications.

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High sensitivity I-beam shaped polarization related vector curvature sensor with optical intensity modulation

Han,

Hasi,

Zhu

et al. 2024

Infrared Physics & Technology

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A dual-parameter sensing system for temperature and curvature based on Nano-EYDF and in-line cascaded Mach-Zehnder interferometer

Cited by 6 publications

References 32 publications

Advances in Tapered Optical Fiber Sensor Structures: From Conventional to Novel and Emerging

Advances in Tapered Optical Fiber Sensor Structures: From Conventional to Novel and Emerging

Angularly Cascaded Long-Period Fiber Grating for Curvature and Temperature Detection

High sensitivity I-beam shaped polarization related vector curvature sensor with optical intensity modulation

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