Article
Engineering, Electrical & Electronic
Jichao Zang, Charu Goel, Muhammad Rosdi Abu Hassan, Wonkeun Chang, Seongwoo Yoo
Summary: The unique characteristics of hollow core fibers make them attractive for designing inline fiber optic devices. We report a novel approach that uses a resonant band of single-ring antiresonant fiber to realize a high-performance hollow-core fiber polarizer. The device offers low transmission loss and a high polarization extinction ratio. These results encourage further development of other hollow-core fiber components.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Yong You, Huiyi Guo, Mao Feng, Baiwei Mao, Huimin Shi, Jiangbing Du, Zhi Wang, Yan-Ge Liu
Summary: The characteristics of higher-order modes in a 7-cell HC-PBF were investigated, revealing the non-degenerate phenomenon of HE21. An optimized 7-cell HC-PBF supporting 6 modes was developed through theoretical analysis. Additionally, bending losses of all HOMs in the fiber were measured, with marked bending loss not observed even at a small bending radius of 0.5 cm, distinguishing it from a solid core four-mode fiber.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Lidong Wang, Meisong Liao, Fei Yu, Weichang Li, Jiacheng Xu, Lili Hu, Weiqing Gao
Summary: In this study, we investigated the structural thermal deformation and resulting birefringence variation in typical PM hollow-core photonic bandgap fibers (HC-PBGFs) for FOG. The thermal sensitivity of birefringence (TSB) of HC-PBGFs was compared with that of panda PM fiber, showing that TSB can be as low as 10^(-7)/100 degrees C for rhombic-core fibers and as high as 10^(-4)/100 degrees C for hexagonal-core fibers. This study provides the foundation for developing high birefringence temperature-stable HC-PBGFs and their applications in FOG.
Article
Optics
Foued Amrani, Jonas H. Osorio, Frederic Delahaye, Fabio Giovanardi, Luca Vincetti, Benoit Debord, Frederic Gerome, Fetah Benabid
Summary: The design of hollow-core photonic crystal fibres with hybrid-lattice cladding significantly reduces confinement loss and preserves single-mode operation, showing potential for next-generation optical fibres.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Optics
T. W. Kelly, P. Horak, I. A. Davidson, M. Partridge, G. T. Jasion, S. Rikimi, A. Taranta, D. J. Richardson, F. Poletti, N. Wheeler
Summary: Hollow-core fibers (HCFs) with glass membranes defining a hollow core can have their optical properties dramatically changed, including loss, bend loss, and modality, by introducing an extremely small gas-induced differential refractive index (GDRI). This provides a new means to control the optical properties of HCF post-fabrication, enhance their performance, and open up new design possibilities.
Article
Optics
Yong Li, Fei Teng, Bo Yang, Zhihao Zhang, Yafei Zhao, Yufei Zhang
Summary: This study analyzes the noise characteristics of HC-PCF IFOG and establishes a model to determine the main noise sources as well as an optimization method for its parameters.
Article
Engineering, Electrical & Electronic
Eric Numkam Fokoua, Wenwu Zhu, Meng Ding, Zitong Feng, Yong Chen, Thomas D. Bradley, Gregory T. Jasion, David J. Richardson, Francesco Poletti, Radan Slavik
Summary: Hollow-core optical fibers convey light in air, showing remarkably low sensitivity of the propagation delay to temperature changes, especially in photonic bandgap type. The residual variation in propagation delay observed near the zero sensitivity wavelength has no apparent correlation to imposed temperature changes. Practical thermal stability of latency is limited by polarization mode dispersion, with strong polarization mode coupling observed in addition to birefringence.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Yu Wang, Jihong Tao, Weihao Yuan, Zhenggang Lian, Qiang Ling, Daru Chen, Zhangwei Yu, Chao Lu
Summary: In this study, a novel optical fiber sensor for simultaneous measurement of high temperature and gas pressure was proposed and experimentally demonstrated using a Regenerated Fiber Bragg grating (RFBG) cascaded with a homemade hollow core Bragg fiber (HCBF). The sensor exhibited high linear pressure and temperature sensitivity in a large dynamic range, and a 2x2 matrix obtained from experimental results enabled simultaneous measurement of temperature and gas pressure. Compact size, low cost, and high sensitivity make this sensor competitive for harsh environment applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Wen Fan, Xuan She, Heliang Shen, Fei Huang, Ran Bi, Kan Chen, Xingfan Chen, Xiaowu Shu
Summary: In this article, a hollow-core photonic crystal fiber (HCPCF) ring resonator based on a spatial coupling method was proposed, with a small component size of 22 x 30 x 6 mm³. By using a 7-core photonic crystal fiber with a mode field diameter of 10μm, a ring resonator with a measured finesse of 18 and a low coupling loss of 0.41 dB was achieved. The practicality of the HCPCF gyro was enhanced by using a highly integrated free space silicon optical bench manufactured by deep silicon etching and tiny optical lens package technology. Moreover, the article investigates two important factors affecting the spatial optical coupling efficiency, lens type and fiber mode field size, providing instructive results for all spatial optical coupling systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Krzysztof Borzycki, Tomasz Osuch
Summary: This paper comprehensively reviews the progress in the development of hollow-core optical fibers (HCFs), including fiber design, fabrication, and parameters. It also analyzes the potential applications of HCFs in future telecom networks and systems. Additionally, it examines the impact of filler gas and contaminants on HCF attenuation and proposes a new fusion splicing technique.
APPLIED SCIENCES-BASEL
(2023)
Article
Optics
Oliver Green, Xi Zhang, Eric R. Numkam Fokoua, Meng Ding, Zitong Feng, Yong Chen, Austin Taranta, Francesco Poletti, David John Richardson, Radan Slavik
Summary: The study demonstrates an in-line polarization controller designed for hollow core photonic bandgap fiber, which involves inserting a length of the fiber into a standard 3-paddle controller commonly used for polarization control using single mode fibers. Despite the difference in operational principles when using hollow core photonic bandgap fiber instead of SMF, effective polarization control can still be achieved effortlessly.
OPTICS COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Jonas H. Osorio, Joao B. Rosolem, Fabio R. Bassan, Foued Amrani, Frederic Gerome, Fetah Benabid, Cristiano M. B. Cordeiro
Summary: Research achievements in hollow-core photonic crystal fibers technology have identified these fibers as excellent platforms for delivering high-power laser beams with minimal interaction with the fiber microstructure. Here, the utilization of a tubular-lattice hollow-core fiber as a promising platform for Power-over-Fiber systems is demonstrated, which expands the range of hollow-core fiber-based beam delivery applications. The experiments reported here identify hollow-core fibers as eligible candidates for next-generation Power-over-Fiber devices.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Zahra Dashtban, Mohammad Reza Salehi, Ebrahim Abiri
Summary: In this paper, a novel hollow-core photonic crystal fiber is proposed for identifying toxic and hazardous gases. The fiber has a wide photonic bandgap and high sensitivity coefficient, making it suitable for applications in the drilling and oil exploration industry.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Lidong Wang, Meisong Liao, Fei Yu, Liang Chen, Yazhou Wang, Dakun Wu, Tianxing Wang, Lili Hu, Weiqing Gao
Summary: Hollow core photonic bandgap fiber (HC-PBGF) has potential applications in fiber optics gyroscopes (FOGs) due to its low nonlinearity and excellent environmental adaptability. However, the complex structure of HC-PBGF makes it prone to defects during fabrication, resulting in degradation of fiber uniformity and optical properties. In this study, we investigated the instability factors encountered in the fabrication process of polarization-maintaining (PM) HC-PBGF, including defects in the fiber core, core-side hole, and fiber diameter. We found that the diameter defect had the greatest impact on fiber properties, while the core-side hole defect had the weakest impact. Our findings provide a theoretical reference for fiber fabrication and reveal the structural deviation tolerance of PM HC-PBGF.
IEEE PHOTONICS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Yong You, Yan-Ge Liu, Yundong Hao, Huiyi Guo, Zhi Wang
Summary: The study focused on the surface modes (SMs) in hollow-core photonic bandgap fiber (HC-PBF) and their impact on fiber performance, naming the SMs and studying their characteristics such as mode field shape, coupling bandwidth, and coupling speed. The study compared coupling characteristics of SMs with different core diameters and validated the theoretical analysis with actual fiber, aiming to deepen understanding of HC-PBF and positively impact its development.
IEEE PHOTONICS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Kaiming Yang, Bonan Liu, Changrui Liao, Yongxue Wang, Zhihao Cai, Jian Tang, Yatao Yang, Yiping Wang
Summary: The sensor proposed in this study is based on PBP-FBG and utilizes spectrum loss, Bragg dip shifts, and cut-off mode shift to measure surrounding liquid level, temperature, and refractive index respectively. It provides a simple and reliable method for accurate measurements in hazardous environments.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Haihong Bao, Wei Jin, Yingzhen Hong, Hoi Lut Ho, Shoufei Gao, Yingying Wang
Summary: Photothermal interferometry with hollow core fibers enables highly sensitive spectroscopic gas sensors. By exploiting the optical-phase-modulation amplifying effect of an HCF resonating cavity, significant improvement in the limit of detection is achieved, enabling ultra-sensitive gas detection.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Jiayan Chen, Zhiyong Bai, Guoxuan Zhu, Rui Liu, Churou Huang, Zheng Huang, Luping Wu, Changrui Liao, Yiping Wang
Summary: A method using femtosecond lasers to inscribe helical long period fiber gratings (HLPFGs) for exciting orbital angular momentum (OAM) of light is experimentally demonstrated. The refractive index modulation (RIM) of HLPFGs is achieved by three-dimensional translation of a fiber without rotation, offering better stability, repeatability, and flexibility. The coupling efficiency can be customized by changing the radius of the helical RIM, independent of laser energy. The study investigates the phase and polarization purity of the coupled modes in HLPFGs. Results show that HLPFGs can directly excite OAM modes, and the polarization state and helical phase of the mode can be adjusted independently, with purity exceeding 91% at resonant wavelength.
Article
Optics
Xunzhou Xiao, Baijie Xu, Xizhen Xu, Bin Du, Ziyong Chen, Cailing Fu, Changrui Liao, Jun He, Yiping Wang
Summary: In this study, a new method for efficiently fabricating high-quality MC-FBG arrays in a seven-core fiber was reported. The fabricated arrays demonstrated strong orientation dependence in bend sensing and were successfully used for shape sensing applications.
Article
Optics
Huajian Zhong, Cailing Fu, Pengfei Li, Bin Du, Chao Du, Yanjie Meng, Yiping Wang
Summary: This paper demonstrates distributed temperature sensing up to 600 degrees C using optical frequency domain reflectometry(OFDR) based on a standard single-mode fiber(SMF) without any treatment. The spatial resolution achieved is 2.5 mm. An algorithm called instantaneous optical frequency resampling (IOFR) is proposed to eliminate the nonlinearity of the laser source and obtain calibrated reference and measurement signals for temperature demodulation. Moreover, the annealed SMF shows better temperature response stability compared to the un-annealed SMF, with a temperature sensitivity of 1.96 GHz/degrees C at 600 degrees C.
Article
Optics
Tiesheng Wu, Dan Yang, Zhizhui Liu, Zuning Yang, Weiping Cao, Yiping Wang
Summary: A novel multifunctional optoelectronic device is proposed in this study with capabilities of optical fiber filtering, external voltage sensing, and refractive index measurement. Through the design of selectively filling liquid crystal and plating gold films, the structure is optimized for various applications, showing great potential in the fields of optical fiber sensing and communication.
Article
Chemistry, Analytical
Pengfei Li, Cailing Fu, Huajian Zhong, Bin Du, Kuikui Guo, Yanjie Meng, Chao Du, Jun He, Lei Wang, Yiping Wang
Summary: A nondestructive measurement method based on Optical frequency domain reflectometry (OFDR) was used to measure the Young's modulus of an optical fiber. The method allows for measuring the averaged Young's modulus and its distribution along the fiber axis. This measurement can be useful for analyzing fiber damage and estimating the service life of optical fiber sensors.
Article
Chemistry, Analytical
Junlan Zhong, Shen Liu, Tao Zou, Wenqi Yan, Min Zhou, Bonan Liu, Xing Rao, Ying Wang, Zhongyuan Sun, Yiping Wang
Summary: This article presents an all fiber-optic immunosensor based on elliptical core helical intermediate-period fiber grating for the detection of human immunoglobulin G. The sensor has high sensitivity, low detection limit, and is insensitive to environmental disturbances.
Article
Engineering, Electrical & Electronic
Kuikui Guo, Jun He, He Li, Baijie Xu, Shengzhen Lu, Shen Liu, Xizhen Xu, Gaixia Xu, Yiping Wang
Summary: This study introduces a method for fabricating ultra-short Type II FBGs using femtosecond laser technology, which can be used for high temperature sensing and precise temperature field distribution measurements with high spatial resolution, showing promising applications in a large-scale fiber sensor network.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Churou Huang, Guoxuan Zhu, Zhiyong Bai, Jiayan Chen, Zheng Huang, Rui Liu, Luping Wu, Shen Liu, Cailing Fu, Yiping Wang
Summary: A novel optical fiber sensing technology based on intensity distribution change in orbital angular momentum (OAM) mode is proposed in this study. The technology utilizes a chiral long-period fiber grating (CLPFG) to directly excite the 1st-order OAM (OAM(1)) mode and tracks the intensity changes in the coherent superposition state between the fundamental mode and the OAM(1) mode at the non-resonant wavelength of the CLPFG to sense external parameters. When applied to temperature measurement, the intensity distribution change has a good linear relationship with temperature in the range of 30°C to 100°C. The sensitivity and resolution can be further improved by changing the area of the collected image.
Article
Chemistry, Physical
Dan Yang, Tiesheng Wu, Yiping Wang, Weiping Cao, Huixian Zhang, Zhihui Liu, Zuning Yang
Summary: This paper proposes and numerically investigates a multi-parameter integrated sensor based on a selectively filled D-shaped photonic crystal fiber. The sensor can comprehensively detect refractive index, magnetic field, temperature, and voltage. The structure is coated with a gold nano-film for refractive index detection and filled with different materials for magnetic field, temperature, and voltage sensing. The measurement of these parameters is independent, allowing for simultaneous detection.
Article
Chemistry, Analytical
Yijian Huang, Ying Wang, Gaixia Xu, Xing Rao, Jiaxiong Zhang, Xun Wu, Changrui Liao, Yiping Wang
Summary: A compact surface plasmon resonance sensor based on an H-shaped optical fiber is proposed, which can achieve specific detection of human IgG. The H-shaped optical fiber obtained from corrosion exhibits a high surface quality and short lengths, and the spectral properties can be controlled by adjusting process parameters.
Article
Chemistry, Analytical
Cong Zhao, Dan Liu, Zhihao Cai, Bin Du, Mengqiang Zou, Shuo Tang, Bozhe Li, Cong Xiong, Peng Ji, Lichao Zhang, Yuan Gong, Gaixia Xu, Changrui Liao, Yiping Wang
Summary: The proposed wearable breath sensor based on a fiber-tip microcantilever detects breath rate by monitoring power variations of reflected light, demonstrating high sensitivity and excellent thermal stability. It is capable of accurately detecting various breath patterns, making it a useful and reliable tool for respiration rate monitoring.
Article
Engineering, Electrical & Electronic
Chenyu Yao, Shoulin Jiang, Shoufei Gao, Yingying Wang, Wei Jin, Wei Ren
Summary: Pump-probe photothermal spectroscopy is proposed for sensitive gas detection. A new phase demodulation method is reported to enhance stability. A proof-of-concept experiment is performed to detect methane gas using the proposed method.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Chen Ziyong, He Jun, Xu Xizhen, He Jia, Xu Baijie, Du Bin, Liao Changrui, Wang Yiping
Summary: This study focused on preparing FBG arrays with multiple wavelengths using femtosecond laser, optimizing process parameters for wavelength stability, and improving FBG performance in high-temperature environments through annealing. The research aims to develop FBG sensors for applications in extreme environments like aeroengines, high-speed aircraft, and nuclear reactor cores.
ACTA OPTICA SINICA
(2021)
