Ring core few-mode fiber sensor for curvature measurement

Zhang, Fan; Su, Baijin; Zhong, Lixi; Qi, Beibei; Xu, Ou; Qin, Yuwen

doi:10.1364/ao.450660

Cited by 16 publications

(4 citation statements)

References 27 publications

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“…Consequently, fiber optic curvature sensors have been widely researched by academic groups and industries worldwide. Several fiber optics sensors have been fabricated using specialty optical fibers such as suspended-core fiber (SCF) [4], dispersion compensation fiber (DCF) [5], seven-core fiber (SCF) [6], C-fiber [7], hollow core fiber (HCF) [8], negative curvature hollow core fiber (NCHCF) [9], and ring core few-mode fiber (RC-FMF) [10]. Not only are specialty fibers used to construct curvature sensors, but SMF is also used.…”

Section: Introductionmentioning

confidence: 99%

Experimental Demonstration to Enhance the Curvature Sensitivity of a Fiber Mach–Zehnder Interferometer Based on a Waist-Enlarged Technique Using Polymer

Martinez-Ramirez,

Hernández-Romano,

Guzmán-Cano

et al. 2024

Photonics

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A fiber curvature sensor based on a Mach–Zehnder Interferometer (MZI) constructed using the waist-enlarged technique to splice a segment of non-zero dispersion-shifted fiber (NZ-DSF) between two segments of single mode fiber (SMF) is proposed and experimentally demonstrated. All fabricated sensors presented an improvement in their curvature sensitivity when they were coated with polydimethylsiloxane (PDMS) polymer. The sensor that exhibited the best performance was 6.5 cm long, with a curvature sensitivity of 8.27 nm/m−1 in a range of 0.69 m−1 (from 1.08 to 1.77 m−1). This sensitivity is 3.22 times higher than that of the sensor without polymer. Additionally, the sensor coated with polymer exhibited cross-sensitivity that is 2.23 times smaller than the sensor without polymer. The easy fabrication and notable performance of this device makes it alluring for structural health monitoring.

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Section: Introductionmentioning

confidence: 99%

Experimental Demonstration to Enhance the Curvature Sensitivity of a Fiber Mach–Zehnder Interferometer Based on a Waist-Enlarged Technique Using Polymer

Martinez-Ramirez,

Hernández-Romano,

Guzmán-Cano

et al. 2024

Photonics

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“…For interferometer-type curvature sensors, the curvature sensitivity is relatively low, especially for Fabry-Perot interferometers (FPI) [9] and multimode interferences [10]. Weihao Yuan [11] and Fang Zhang et al [12] proposed a simple Mach-Zehnder interferometer (MZI) using ring core fiber (RCF) for curvature and temperature sensing. The MZI is Sensors 2024, 24, 184 2 of 10 fabricated by splicing a segment of RC-FMF between two pieces of single-mode fiber (SMF) or no-core fiber (NCF).…”

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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“…Optical fiber sensors (OFSs) have been widely investigated in various measurements, for instance, temperature [1] , humidity [2] , refractive index [3] , strain [4] , curvature [5] , liquid level [6] , and torsion [7,8] . Bending measurement plays a significant role in robotics applications, structural health monitoring, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Bai et al proposed a curvature sensor, which is fabricated by splicing a segment of RCF between two pieces of single-mode fibers (SMFs) with two up-tapers [15] . Our previous works proposed an MZI curvature sensor based on the SMF-RCF-SMF structure [5] . The sensor was fabricated by splicing a segment of RCF between two pieces of SMF.…”

Section: Introductionmentioning

confidence: 99%

High sensitivity all-fiber bend sensor based on modal interferences in a ring core fiber

Zhang

et al. 2023

中国光学快报

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We proposed and experimentally demonstrated an all-fiber sensor for measuring bend with high sensitivity based on a ring core fiber (RCF) modal interferometer. The sensor was fabricated by splicing a segment of RCF between two pieces of multimode fiber (MMF) and single-mode fiber (SMF) at the ends of the MMF as lead-in and lead-out. Due to the first segment of the MMF, the transmitted light is coupled into the ring core, silica center, and cladding of the RCF, exciting multiple modes in the RCF. By the modal interferences in the structure, bending sensing can be realized by interrogating the intensity of the interference dip. Experimental results show a high bending sensitivity of −25.63 dB=m −1 in the range of 1.0954 m −1 to 1.4696 m −1 . In addition, the advantages of the bend sensor, such as small size, low temperature sensitivity, and simple fabrication process, can be used for curvature measurement in building health monitoring.

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Ring core few-mode fiber sensor for curvature measurement

Cited by 16 publications

References 27 publications

Experimental Demonstration to Enhance the Curvature Sensitivity of a Fiber Mach–Zehnder Interferometer Based on a Waist-Enlarged Technique Using Polymer

Experimental Demonstration to Enhance the Curvature Sensitivity of a Fiber Mach–Zehnder Interferometer Based on a Waist-Enlarged Technique Using Polymer

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

High sensitivity all-fiber bend sensor based on modal interferences in a ring core fiber

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