Article
Optics
A. Halstuch, A. A. Ishaaya
Summary: Chirped fiber Bragg gratings (CFBGs) and arrays of fiber Bragg gratings (FBGs) were fabricated using femtosecond pulses and a single uniform phase-mask (PM). The fabricated gratings demonstrated tunability in wavelength and achieved non-overlapping inscription on fresh fiber sections. The resulting gratings exhibited spectral shifts and good performance, as measured through transmission and reflection spectra.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Yifan Shi, Yan Mao, Xiaoqiang Xu, Jialong Xia
Summary: This article presents a flexible sensor based on fiber Bragg gratings and a spiral surrounding structure design. By using a convolutional neural network and machine learning techniques, the sensor can achieve high-precision angle recognition. Experimental results demonstrate that this sensing system can meet the application requirements of biomimetic robots and clinical surgical operations.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Junyi Guo, Mengya Sun, Jinhui Fang, Guangqing Wei, Bin Shi, Hongtao Jiang
Summary: Seawater salinity is a crucial parameter for understanding the ocean's hydrological information. Cladding etched fiber Bragg grating (CE-FBG) technology has shown promise in salinity sensing due to its sensitivity to refractive index. In this study, different CE-FBG salinity sensing elements were fabricated using wet chemical etching. The CE-FBG sensor, integrated with a bare FBG (B-FBG), exhibited accurate and consistent measurements of seawater salinity and temperature, indicating the potential of fiber optic sensors for salinity measurement. The study highlights the high sensitivity, long-term stability, and quasi-distributed monitoring capabilities of the CE-FBG salinity sensor.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Luis Pereira, Rui Min, Tiago Paixao, Carlos Marques, Getinet Woyessa, Ole Bang, Joao L. Pinto, Paulo Fernando da Costa Antunes
Summary: This article presents two configurations for simultaneous measurement of strain and temperature by reducing the cross-section area in small fiber regions. The dual sensitivity to strain is achieved by using a single Bragg grating inscribed in a microstructured polymer optical fiber. The devices show higher strain sensitivity and thermal sensitivity, making them suitable for fabricating compact sensors.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
You-Hang Xie, Chuang Wu, Jie Li, Bai-Ou Guan
Summary: A temperature-compensated refractive index (RI) sensor based on thinned seven-core fiber (SC-SCF) supermode Bragg grating and interferometer was successfully demonstrated. The device was fabricated through fusion splicing and chemical etching, and the Bragg grating was inscribed into the thinned fiber. The RI and temperature responses of the sensor were analyzed and measured experimentally.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Keivan Mahmoud Aghdami, Abdullah Rahnama, Erden Ertorer, Peter R. Herman
Summary: This study explores the use of ultrashort-pulsed laser filaments to create high density arrays of laser filamented holes in optical fiber, resulting in high refractive index contrast Bragg gratings for telecommunications. The technique combines point-by-point fabrication with post-chemical etching to engineer strong photonic stopbands directly inside the compact and flexible fiber, allowing for high resolution refractive index sensing.
NATURE COMMUNICATIONS
(2021)
Review
Engineering, Electrical & Electronic
Xinyao Hu, Yang Xu, Haoxi Zhang, Jianhao Xie, Dengqiang Niu, Zhong Zhao, Xingda Qu
Summary: This article provides a comprehensive survey of fiber Bragg grating (FBG) sensing gloves, focusing on sensing characteristics, functionality, performance, system design, structure, and motion tracking algorithms. The survey identifies challenges and research gaps in FBG sensing gloves, including the need for innovation in system and structure design, the development of more advanced models, and the improvement of multiplexing sensing capabilities. This survey can serve as a guide for future research in this field.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Mingjing Xu, Jiaxin Liu, Yujia Zhao, Peizhen Jiang, Chonglu Jing, Weikang Yao, Qilin Zhou, Ai Zhou
Summary: In this study, we proposed and investigated the performance of torsion sensing using tilted long period gratings (TLPG) in eccentric dual core fiber (EDCF). The results showed that the EDCF structure exhibited good structural stability and high torsion sensitivity, making it a promising candidate for multi-channel sensing applications.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Joseph D. Hart, Caitlin R. S. Williams, Geoffrey A. Cranch
Summary: This study investigates the limits of distributed strain sensing using all-grating fiber, focusing on the impact of non-identical Bragg gratings and the breakdown of the Born approximation. It is found that the auto-correlation term does not cause significant errors in measurements, while the Born approximation generally limits the sensing range of AGF. Proposed novel solutions to extend the sensing range by controlling the properties of the non-identical Bragg gratings are verified through measurements with a commercially available OFDR.
Article
Engineering, Multidisciplinary
Damian Harasim
Summary: This paper presents a method to improve the reliability of liquid solution refractive index measurement using tilted fiber Bragg gratings (TFBGs), by employing a specialized setup of cascaded TFBGs to enhance the stability of cladding resonances under various light polarizations. Experimental results demonstrate the effectiveness of this approach.
Article
Engineering, Electrical & Electronic
Flavio Esposito, Stefania Campopiano, Agostino Iadicicco
Summary: This work presents the design, fabrication, and characterization of a miniaturized metallic package for optical fiber Bragg grating (FBG) sensors. The package enhances the temperature sensitivity of the grating and eliminates cross-sensitivities to mechanical effects. It has a simple design and is made using off-the-shelf components. The packaged FBG shows improved temperature response and reduced sensitivity to longitudinal forces compared to an unpackaged FBG.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
G. Woyessa, A. Theodosiou, C. Markos, K. Kalli, O. Bang
Summary: This research demonstrates the use of low loss commercially available multi-mode perfluorinated polymer optical fibers for robust and reliable fiber Bragg grating sensing. The single peak FBG reflection spectrum achieved through tapering the fiber and inscribing the FBG allows for high sensitivity strain and humidity measurements. The approach enables multi-point strain sensing at 1550 nm over long distances and combines the advantages of single mode POFs and MM POFs.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Haoyan Zang, Shuiquan Pang, Benliang Zhu, Hongchuan Zhang, Hai Li, Sergej Fatikow, Xianmin Zhang
Summary: This article presents a cantilever-type fiber Bragg grating (FBG)-based microforce sensor with micro-Newton resolution, which is essential for the detection of micro-forces in the micro-/nanomanipulation process. The sensor has a resolution of 7 μN force in the range of 10 mN, and it is successfully applied in the mechanical property test of the zebrafish embryo.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Olga Rusyakina, Tigran Baghdasaryan, Karima Chah, Pawel Mergo, Hugo Thienpont, Christophe Caucheteur, Francis Berghmans, Thomas Geernaert
Summary: We present an extrinsic surface plasmon-enhanced refractometer based on cladding mode resonance excitation in a photonic crystal fiber (PCF) with a straight fiber Bragg grating (FBG). By selecting suitable PCF parameters, high sensitivity to changes in refractive index close to that of water can be achieved. The sensor fabrication does not require post-processing and multi-target detection is possible using cascaded wavelength-multiplexed gratings.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Biomedical
Wagner Coimbra, Pedro Oliveira, Carlos Marques, Arnaldo Leal-Junior
Summary: Fiber Bragg Grating (FBG) sensors, characterized by small diameter, multiplexing capability, intrinsic safety, and biocompatibility, have been tested in dentistry for appliances, implants, and splints. They contribute to the study of dental biomechanics and aid in the development of new techniques, comparison of treatments, and evaluation of different occlusal splints. The Chirped FBG (CFBG) demonstrates the measurement principle of bite forces applied to occlusal splints and offers distributed sensing capability. The instrumentation of occlusal splints with CFBG sensors helps in distinguishing bite patterns, understanding the effects of appliances, and comparing different types of splints.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Zhannat Ashikbayeva, Arman Aitkulov, Timur Sh. Atabaev, Wilfried Blanc, Vassilis J. Inglezakis, Daniele Tosi
Summary: Thermal ablation therapy is an effective alternative to surgery, and the use of silver nanoparticles can improve heat propagation during the procedure. The study demonstrated that silver nanoparticles could increase the temperature during thermal therapies by propagating the heat.
Article
Chemistry, Analytical
Aida Amantayeva, Nargiz Adilzhanova, Aizhan Issatayeva, Wilfried Blanc, Carlo Molardi, Daniele Tosi
Summary: A guidance system based on a network of fiber optic distributed sensors has been developed for epidural anesthesia, allowing real-time reconstruction of the epidural device silhouette and identification of bending patterns typical in epidural insertions to support the operator.
Article
Chemistry, Analytical
Sanzhar Korganbayev, Marzhan Sypabekova, Aida Amantayeva, Alvaro Gonzalez-Vila, Christophe Caucheteur, Paola Saccomandi, Daniele Tosi
Summary: This work experimentally investigates the impact of chemical etching on the refractive index sensitivity of tilted fiber Bragg gratings (TFBGs). The optical fiber diameter was reduced stepwise from 125 μm to 13 μm using hydrofluoric acid (HF). The TFBGs were calibrated using two ranges of refractive index solutions, and the sensitivity was analyzed in terms of wavelength shift and intensity change of the grating resonances. The study provides insights into the optimization of the etching process for achieving the best trade-off between sensitivity, intensity level, and fiber thickness.
Article
Chemistry, Analytical
Akbota Sametova, Sabit Kurmashev, Zhannat Ashikbayeva, Aida Amantayeva, Wilfried Blanc, Timur Sh Atabaev, Daniele Tosi
Summary: This study presents the design of an optical fiber distributed sensing network for real-time monitoring of the thermal distribution in radiofrequency thermal ablation methods. Experimental results on bovine phantom show that ablation methods mediated by agarose and gold nanoparticles can achieve optimal ablation effects.
Article
Biophysics
Aliya Bekmurzayeva, Zhannat Ashikbayeva, Nazerke Assylbekova, Zhuldyz Myrkhiyeva, Ayazhan Dauletova, Takhmina Ayupova, Madina Shaimerdenova, Daniele Tosi
Summary: This study has successfully developed a biosensor capable of detecting CD44 at attomolar levels. It has advantages of low detection limit, simple fabrication, wide dynamic range, and usability in flow conditions.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Chemistry, Analytical
Aida Rakhimbekova, Baizak Kudaibergenov, Damir Moldabay, Albina Zharylgap, Obinna M. Ajunwa, Enrico Marsili, Daniele Tosi
Summary: This study examines the possibilities of using optical and fiber-based biosensors to detect and analyze early bacterial biofilms. By inoculating Pseudomonas aeruginosa on the surface of the optical sensor, researchers have developed a low-cost and rapid detection method for biofilm formation on medical devices.
Review
Chemistry, Analytical
Catia Leitao, Sonia O. Pereira, Carlos Marques, Nunzio Cennamo, Luigi Zeni, Madina Shaimerdenova, Takhmina Ayupova, Daniele Tosi
Summary: In recent years, optical fiber sensors have emerged as reliable and versatile tools for biosensing. Optical fiber biosensors (OFBs) utilize optical fibers as transducers, offering advantages such as easy coating and biofunctionalization, real-time monitoring, small size, and geometric flexibility. This paper reviews the most cost-effective OFBs and highlights various fiber configurations, packaging techniques, and interrogation approaches using smartphones. The application of OFBs in the detection of cancer and cardiovascular biomarkers, as well as environmental monitoring, is also discussed.
Review
Engineering, Electrical & Electronic
Daniele Tosi, Madina Shaimerdenova, Marzhan Sypabekova, Takhmina Ayupova
Summary: Optical fiber biosensors are of significant interest as they enable real-time, low-limit, and high precision detection of biological analytes. Minimalistic designs of biosensors have recently gained attention for their rapid, automated operation and scalability potential.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Zhanerke Katrenova, Shakhrizat Alisherov, Turar Abdol, Madina Yergibay, Zhanat Kappassov, Daniele Tosi, Carlo Molardi
Summary: This study presents the construction and investigation of a 2D sensing carpet based on a distributed fiber sensing technique for mapping local pressure. The results show that fully embedding the fiber inside the silicone carpet achieves the best pressure sensitivity coefficient.
Article
Chemistry, Analytical
Madina Shaimerdenova, Takhmina Ayupova, Aliya Bekmurzayeva, Marzhan Sypabekova, Zhannat Ashikbayeva, Daniele Tosi
Summary: This study presents a spatial-division multiplexing method for fiber-optic ball resonators, which has been experimentally validated to be highly efficient and capable of designing a sensing network with reasonable penalties. The method enables simultaneous detection of different cancer biomarkers.
Article
Chemistry, Analytical
Zhaniya U. Paltusheva, Zhannat Ashikbayeva, Daniele Tosi, Lesya V. Gritsenko
Summary: Significant progress has been made in the prevention, treatment, and prognosis of various types of cancer using biological markers. This study introduces a fiber-optic biosensor for measuring the CD44 protein, which has a good response and high sensitivity.
Article
Chemistry, Analytical
Bayan Kurbanova, Zhannat Ashikbayeva, Aida Amantayeva, Akbota Sametova, Wilfried Blanc, Abduzhappar Gaipov, Daniele Tosi, Zhandos Utegulov
Summary: We utilized non-contact laser-based Brillouin light-scattering (BLS) spectroscopy to measure the viscoelastic properties of RF-heated and ablated bovine liver and chicken flesh tissues with embedded AuNPs. The local surface temperature of the flesh samples during hyperthermia was measured using optical backscattering reflectometry (OBR) and correlated with the viscoelastic variations in the heat-affected and ablated tissues. The observed changes in tissue stiffness were directly linked to heat-induced structural modifications and the denaturation of proteins.
Review
Chemistry, Analytical
Yanyu Xiong, Skye Shepherd, Joseph Tibbs, Amanda Bacon, Weinan Liu, Lucas D. Akin, Takhmina Ayupova, Seemesh Bhaskar, Brian T. Cunningham
Summary: Nanoscale fluorescence emitters are efficient in measuring biomolecular interactions but limited in applications requiring single-unit observations due to various challenges. Photonic crystal structures offer solutions for fluorescence enhancement by optimizing numerical aperture objectives, reducing fluorescence intermittency, and improving photon collection efficiency. This review provides an overview of photonic crystals, their design, fabrication, and sensing principles, as well as recent applications in biosensors for nucleic acids, proteins, and steroids. The review also discusses current challenges and future prospects of fluorescence enhancement with photonic-plasmonics coupling in point-of-care biosensing and monitoring analytes of biological and environmental relevance.
