Article
Engineering, Electrical & Electronic
Yucheng Yao, Zhiyong Zhao, Weilun Wei, Can Chen, Zhuyixiao Liu, Yuxuan Xiong, Huan He, Lei Shen, Weijun Tong, Ming Tang
Summary: This article proposes and experimentally demonstrates a high-resolution omnidirectional vector bending sensor based on 7-core fiber Mach-Zehnder interferometers (MZIs), which is interrogated by the microwave photonics technique. By using high-resolution microwave photonics filter (MPF) system, the sensor achieves a curvature measurement resolution of 0.0213 m(-1) when the resolution of vector network analyzer (VNA) is 500 kHz. The unique advantages of high sensitivity and high resolution make this sensor very promising for omnidirectional vector bending sensing in the future.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Hongye Wang, Lingzhi Meng, Qi Xia, Shitai Yang, Tingting Yuan, Xiaotong Zhang, Libo Yuan
Summary: A bending sensor is proposed to convert the multichannel bending signals of multicore fiber (MCF) to single-channel signals using the phase mask method combined with the thermal diffusion technique (TDT). The sensor was fabricated using a four-core fiber (FCF) with different resonant wavelengths for each fiber core through the method of core-by-core inscribed fiber Bragg gratings (FBGs). Single-channel measurement of the 3-D parallel FCF FBGs signals was achieved by coupling the FCF with a single-mode fiber (SMF) using the TDT method. The sensor demonstrated high bending sensitivities and eliminated crosstalk caused by temperature and strain.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Zhifeng Wang, Liang Zhang, Zhangwei Ma, Zhenyi Chen, Tingyun Wang, Fufei Pang
Summary: The Mach-Zehnder interferometer sensor based on a four-core sapphire-derived fiber shows promising potential for bending sensing applications, with the ability to fabricate sensors with different bending properties. The experimental results demonstrate high sensitivity and potential for application in structural health monitoring.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
Xuechun Wang, Yufei Wang, Ketao Zhang, Kaspar Althoefer, Lei Su
Summary: Optical fiber bending sensors have traditionally been complex in design, but our study shows that the output speckles of multimode fibers contain valuable 3D shape information. By utilizing a single multimode fiber and the KNN algorithm, we successfully demonstrated 3D multi-point deformation sensing with close to 100% classification accuracy. This indicates that a single multimode fiber-based deformation sensor has great potential in terms of system simplicity, resolution, and sensitivity, making it a promising candidate for deformation monitoring or shape-sensing applications.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Fengyi Chen, Xingyong Li, Weijia Bao, Ruohui Wang, Xueguang Qiao
Summary: A compact and simple two-dimensional vector bending sensor based on an edge-core cladding-type fiber Bragg grating (ECLFBG) is proposed and demonstrated, which can measure both the magnitude and direction of bending simultaneously by analyzing the wavelength shift and reflection intensity variations of the ECLFBG.
Article
Optics
Yin Liu, Ai Zhou, Libo Yuan
Summary: The multifunctional fiber-optic sensor proposed in this study utilizes helical-twisted-structure-assisted fiber Bragg gratings on a triangular four-core fiber to simultaneously measure directional torsion and vector bending. By subtracting the wavelength change of the central core HTSA-FBG from the wavelength change of the side core HTSA-FBGs, the influence of temperature and strain can be eliminated to improve shape accuracy. Torsion sensitivity can be adjusted by changing the pitch of the helical-twisted region.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Shen Liu, Wenqi Yan, Junlan Zhong, Tao Zou, Min Zhou, Peijing Chen, Hang Xiao, Bonan Liu, Zhiyong Bai, Yiping Wang
Summary: This article introduces an all fiber-optic breath sensor based on E-HIPFG, which has ultrafast response and recovery time, insensitivity to external influences, and does not require additional coating materials or fiber architectures, making it suitable for continuous and long-term breath monitoring.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Engineering, Electrical & Electronic
Naohiro Sonoda, Reina Takagi, Itsuki Saito, Tetsuya Abe, Shihua Zhao, Yosuke Tanaka
Summary: The proposed fiber optic multi-point bending measurement system utilizes TPA photocurrent from Si-APD to measure optical intensity, allowing measurement of reflection spectra of multiple Bragg gratings in MCF and accurate measurement of bending radius and direction.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Analytical
Lina Suo, Ya-Pei Peng, Nan-Kuang Chen
Summary: Bending sensing can be achieved by constructing a tapered four-core optical fiber sensor. The sensor uses a four-core fiber, which is tapered between the fan-in and fan-out couplers to gradually reduce the distance between the four cores and generate supermodes. When the diameter of the tapered four-core fiber is 7.5 µm and the length is 2.21 mm, the sensor can achieve a sensitivity of 16.12 nm/m.
Article
Engineering, Electrical & Electronic
Shengyao Xu, Weijie Chang, Yiyang Luo, Perry Ping Shum, Lei Wei, Yangan Zhang, Xueguang Yuan, Zhenggang Lian, Yongqing Huang
Summary: The compact and cost-effective vector bending sensor proposed in this study utilizes a specially designed SSAF structure to achieve sensitive detection of bending with orientation dependence, without the need for complex alignment procedures or fiber grating inscription.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Multidisciplinary
Xiao-peng Han, Wuliji Hasi, Ying Guo, Yun-dong Zhang, Si-yu Lin, Fan Wang
Summary: This study presents a novel vector bamboo joint cascaded microcavity curvature sensor, VC-BM, which utilizes light intensity correlation. The device is fabricated using arc fusion and optimized for high-quality transmission spectra. The feasibility and sensitivity of vector curvature sensing via intensity modulation have been demonstrated, and a new algorithm has been proposed to enhance curvature direction recognition and sensitivity.
Article
Engineering, Electrical & Electronic
Ravil Idrisov, Ignazio Floris, Manfred Rothhardt, Hartmut Bartelt
Summary: Characterization and calibration procedures are crucial for achieving high accuracy in shape measurement with multicore optical fibres. Applying calibration corrections can significantly reduce errors in curvature calculation and improve the overall accuracy of curvature measurement.
OPTICAL FIBER TECHNOLOGY
(2021)
Article
Optics
Luyao Wang, Shuguang Li, Xiaojian Meng, Ying Guo, Zenghui Li
Summary: A novel high and low refractive index double-ring structure in few-mode multicore fibers (FM-MCFs) is proposed to suppress intercore and intermodal cross talk. Numerical analysis shows that the HL-DR structure contributes significantly to meeting the XT requirements in FM-MCFs, leading to the design of a high performance seven-core fiber.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Rui Zhou, Wenyu Hu, Changhao Yi, Yizhuo Li, Yuanhao Su, Ruohui Wang, Xueguang Qiao
Summary: This article introduces a vector accelerometer based on a silicone rubber compliant cylinder, which has high integration, small size, and multistage cascaded multiplexing, making it suitable for multipoint measurement in narrow spaces.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Xian Dong, You-Hang Xie, Jia-Le Ou, Chuang Wu, Jie Li, Bai-Ou Guan
Summary: A Bragg grating is successfully formed in a strongly coupled seven-core fiber. Two separate Bragg resonance notches are observed in the transmission spectrum, corresponding to backward coupling of two supermodes of the fiber. The mode coupling mechanism is investigated both theoretically and experimentally, and the results agree well. The device shows potential for simultaneous measurement of temperature and curvature.
Article
Chemistry, Physical
Mikel Azkune, Angel Ortega-Gomez, Igor Ayesta, Joseba Zubia
Article
Chemistry, Multidisciplinary
Javier Barroso, Angel Ortega-Gomez, Alba Calatayud-Sanchez, Joseba Zubia, Fernando Benito-Lopez, Joel Villatoro, Lourdes Basabe-Desmonts
Article
Optics
Joel Villatoro, Josu Amorebieta, Angel Ortega-Gomez, Enrique Antonio-Lopez, Joseba Zubia, Axel Schulzgen, Rodrigo Amezcua-Correa
Article
Multidisciplinary Sciences
Josu Amorebieta, Angel Ortega-Gomez, Gaizka Durana, Ruben Fernandez, Enrique Antonio-Lopez, Axel Schulzgen, Joseba Zubia, Rodrigo Amezcua-Correa, Joel Villatoro
SCIENTIFIC REPORTS
(2020)
Article
Chemistry, Analytical
Angel Ortega-Gomez, Javier Barroso, Alba Calatayud-Sanchez, Joseba Zubia, Fernando Benito-Lopez, Lourdes Basabe-Desmonts, Joel Villatoro
Summary: This new approach of monitoring nanospectroscopic absorption changes of plasmon resonance spectrum shows linear behavior and good detection performance for target biomolecules, with potential to open new alternatives for plasmonic sensing.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Optics
Josu Amorebieta, Angel Ortega-Gomez, Ruben Fernandez, Enrique Antonio-Lopez, Axel Schulzgen, Joseba Zubia, Rodrigo Amezcua-Correa, Gaizka Durana, Joel Villatoro
Summary: This paper presents a temperature sensor based on multicore fiber that operates in a wide thermal range and is robustly packaged for harsh environments. The sensor shows higher sensitivity in reflection mode and is packaged with inner ceramic and outer metallic tubes for protection. The device can accurately measure temperature in demanding industrial applications and can be easily fabricated and interrogated.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Amaia Berganza, Eneko Arrospide, Josu Amorebieta, Joseba Zubia, Gaizka Durana
Summary: This paper discusses the theoretical analysis and fabrication process of a dual-core microstructured polymer optical fiber. It emphasizes the importance of coupling characteristics in assessing the quality of the fabrication process. Results show that the manufactured mPOF reached a coupling efficiency of up to 95.26%, making it suitable for applications requiring highly efficient power couplers.
Article
Multidisciplinary Sciences
Josu Amorebieta, Joao Pereira, Gaizka Durana, Carolina Franciscangelis, Angel Ortega-Gomez, Joseba Zubia, Joel Villatoro, Walter Margulis
Summary: This work presents a twin-core fiber sensor system that offers improved spectral efficiency, multiplexing capability, and low crosstalk. Each sensor in the laser cavity system can be individually addressed and distinguished, even in cases of overlapping spectra. The system has potential for significantly increased number of interrogated sensors, making it attractive for multipoint sensing applications.
SCIENTIFIC REPORTS
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Gorka Zubia, Josu Amorebieta, Joseba Zubia, Gaizka Durana
Summary: This work presents an algorithm for optimizing the design of an optical fiber bundle displacement sensor for Tip Clearance and Tip Timing measurements. The algorithm is based on the gaussian beam mathematical approach and implements a specific fiber arrangement. By modifying the parameters of the sensor and fiber, the effects of the modifications can be monitored in real time. The results show that key parameters include gain configuration, distance between receiving fiber rings, and radii of receiving fibers. The best sensor configuration is a tradeoff between these characteristics and heavily depends on measurement constraints. The results obtained from the simulation tool are in good agreement with the calibration curve of the manufactured optical fiber bundle displacement sensor in a scaled rotor.
OPTICAL SENSING AND DETECTION VII
(2022)
Article
Optics
Angel Ortega-Gomez, Mederic Loyez, Maxime Lobry, Karima Chah, Joseba Zubia, Joel Villatoro, Christophe Caucheteur
Summary: Bare and gold-coated tilted fiber Bragg gratings (TFBGs) are mature technologies for volume and surface refractometric sensing. Efforts are being made to produce more sensitive sensors for high-resolution screening of surroundings and detection of rare events. This study explores the development of TFBG refractometers in 4-core fibers, achieving high sensitivity and surface sensitivity with DNA probes immobilization as proof.
Review
Engineering, Aerospace
Ruben Fernandez, Josu Amorebieta, Iker Garcia, Gotzon Aldabaldetreku, Joseba Zubia, Gaizka Durana
Summary: The evolution of a custom-designed optical sensor through five configurations, with the last one showing high resolution and sensitivity, allows for the detection of blade defects, cracks, etc., which could otherwise be difficult to track.
INTERNATIONAL JOURNAL OF TURBOMACHINERY PROPULSION AND POWER
(2021)
