Article
Engineering, Electrical & Electronic
Alicja Anuszkiewicz, Marcin Franczyk, Dariusz Pysz, Filip Wlodarczyk, Adam Filipkowski, Ryszard Buczynski, Tomasz Osuch
Summary: We have developed a silica-based large mode area fiber with a nanostructured core for use in fiber laser cavities. Our experimental results demonstrate that the fiber operates in single mode with low bending loss. We have also successfully fabricated high reflectivity UV induced fiber Bragg gratings and utilized them in a fiber laser setup. The flexibility of the nanostructuring approach holds promise for the development of passive fiber components that can be matched with any type of active fibers.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
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
Marco Pisco, Dia Darwich, Ayman Youssef, Haitham Zaraket, Andrea Cusano
Summary: In this paper, a Fiber Bragg Grating (FBG) interrogation system is proposed based on laser wavelength modulation. The system utilizes a Digital Supermode - Distributed Bragg Reflector (DS-DBR) laser as the key component, which allows for the extraction of Bragg wavelength information from the modulated signal reflected by the FBG. The system demonstrates a tradeoff between spectral resolution and interrogation speed.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
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
Deep Pal, Amitesh Kumar, Abhinav Gautam, Jaisingh Thangaraj
Summary: This paper proposes an optical weight measurement system based on FBG sensors and improves the accuracy and range of measurement using machine learning algorithms. The experimental analysis demonstrates that the GPR algorithm provides more accurate weight measurement than other standard approaches.
IEEE SENSORS JOURNAL
(2022)
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
T. Blanchet, A. Morana, E. Marin, Y. Ouerdane, A. Boukenter, S. Girard
Summary: Temperature sensors based on Fiber Bragg gratings (FBGs) offer advantages such as small packaging, fast acquisition rate, and accuracy for structural health monitoring in nuclear environments. Regenerated FBGs (RFBGs) derived from Type I FBGs can withstand temperatures up to 1000 degrees C, making them suitable for applications like temperature monitoring in nuclear reactor cores.
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Yong Zhao, Tong-yue He, Mao-qing Chen, Zhen-bo Zhang, Rui-jie Tong
Summary: An ultra-short fiber Bragg grating (US-FBG) refractive index (RI) sensor is developed and tested in this study. The US-FBG consists of a series of cascaded microchannels carved by femtosecond (fs) laser. Based on simulation results, a US-FBG with length/period of 149.8/5.35 μm is fabricated and used for measuring the RI of liquids. Experimental results show that the sensor has a sensitivity of 600.5622 nm/RIU within a linear response range of 1.3323 to 1.3787. The compact size, high sensitivity, reliability, and ease of modulation make the US-FBG promising for biosensing applications related to RI.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Maxime Lobry, Hadrien Fasseaux, Mederic Loyez, Karima Chah, Erik Goormaghtigh, Ruddy Wattiez, Francesco Chiavaioli, Christophe Caucheteur
Summary: Gold-coated tilted fiber Bragg gratings (TFBGs) have been extensively studied for biosensing applications, with a more sensitive demodulation method based on the intersection of the upper and lower envelopes of TFBG spectra being reported in this paper. This method has been successfully applied in detecting HER2 proteins, and practical improvements such as superimposing a uniform FBG and implementing a micro-fluidic system have been made to enhance the sensing platform for practical applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Polymer Science
Xuehao Hu, Yuhang Chen, Shixin Gao, Rui Min, Getinet Woyessa, Ole Bang, Hang Qu, Heng Wang, Christophe Caucheteur
Summary: This study reports the fabrication of fiber Bragg gratings (FBGs) in single mode step-index polymer optical fibers (POFs) using femtosecond pulses and a point-by-point inscription method. The FBGs showed good stability and reproducibility, and their reflectivity increased after post-annealing. The research findings have potential applications in humidity insensitive high temperature measurement.
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)
Review
Chemistry, Analytical
Adriana Morana, Emmanuel Marin, Laurent Lablonde, Thomas Blanchet, Thierry Robin, Guy Cheymol, Guillaume Laffont, Aziz Boukenter, Youcef Ouerdane, Sylvain Girard
Summary: Fiber Bragg gratings are optical fiber sensors used for monitoring environmental parameters, but their performance can be affected by radiation-induced Bragg wavelength shift. By controlling factors such as inscription conditions, fiber type, and irradiation conditions, FBGs with limited wavelength shift can be manufactured for use in radiation-rich environments.
Article
Engineering, Electrical & Electronic
Arnaldo Leal-Junior, Carlos Marques, Anselmo Frizera
Summary: This paper presents the development, numerical and experimental analyses of a fiber Bragg grating (FBG) based sensor for force amplitude and localization detection. The diaphragm-embedded FBG allows for a larger spatial range and enables the strain transmission to the optical fiber even when the force is not directly applied to the fiber. The results show the feasibility of the method for sub-millimeter resolution force and impact detection.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Arnaldo Leal-Junior, Antreas Theodosiou, Vitorino Biazi, Leandro Macedo, Carlos Marques, Kyriacos Kalli, Anselmo Frizera
Summary: In this study, we demonstrate an off-centered tilted fiber Bragg grating (FBG) for curvature sensing. The grating was inscribed in cyclic transparent optical polymer (CYTOP) fiber using a femtosecond laser with a direct write, plane-by-plane method. The off-center grating shows improved performance in terms of wavelength shift and optical power sensitivity compared to a centered FBG inscribed using the same method. Additionally, the temperature sensitivity differences of the two gratings enable the development of a temperature-insensitive angle sensor using a single off-center tilted FBG.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Hongye Li, Xin Tian, Hao Li, Baiyi Wu, Xiaofan Zhao, Meng Wang, Chenhui Gao, Binyu Rao, Xiaoming Xi, Zilun Chen, Zefeng Wang, Jinbao Chen
Summary: A pair of fiber Bragg gratings (FBGs) were fabricated using a visible femtosecond laser phase mask scanning technique on passive large-mode-area double-cladding fibers for multi-kilowatt fiber oscillators. The high-reflection (HR) and low-reflection (LR) FBGs have bandwidths of -1.6 nm and 0.3 nm, respectively. The all-fiber oscillator using these FBGs achieved a record output power of 5027 W with a slope efficiency of -82.1% and a beam quality factor M2 of -1.6 at maximum power. The thermal efficiency of the HR-FBG and the LR-FBG is 2.76 degrees C/kW and 1 degrees C/kW, respectively. This research provides an effective solution for robust high-power all-fiber laser oscillators.
CHINESE OPTICS LETTERS
(2023)
Article
Optics
Jie Chen, Xin Zhao, Zijun Yao, Ting Li, Qian Li, Shuguo Xie, Jiansheng Liu, Zheng Zheng
Article
Optics
Xinxin Jin, Meng Zhang, Guohua Hu, Qing Wu, Zheng Zheng, Tawfique Hasan
Article
Optics
Jie Chen, Xin Zhao, Ting Li, Jianjun Yang, Jiansheng Liu, Zheng Zheng
Article
Optics
Qing Wu, Yunzheng Wang, Weichun Huang, Cong Wang, Zheng Zheng, Meng Zhang, Han Zhang
PHOTONICS RESEARCH
(2020)
Article
Optics
Qian Zhang, Xinxin Jin, Guohua Hu, Meng Zhang, Zheng Zheng, Tawfique Hasan
Article
Optics
Guoqing Hu, Ya Liu, Xin Zhao, Zheng Zheng
Article
Optics
Chunlong Yu, Hao Guo, Zhuoyan An, Yihan Li, Zheng Zheng
Summary: In this work, an actively stabilized photonic system for millimeter-wave signal distribution is proposed and experimentally demonstrated, successfully suppressing phase fluctuations and improving long-term stability.
Article
Engineering, Electrical & Electronic
Yujie Lyu, Yihan Li, Chunlong Yu, Li Yi, Tadao Nagatsuma, Zheng Zheng
Summary: A photonic-based technique for generating highly-linear ultra-wideband stepped-frequency microwave signals with large time-bandwidth product is proposed and demonstrated experimentally. This technique provides a promising low-cost solution for high resolution radar and other applications that require large time-bandwidth product waveforms with frequency scalability and extreme linearity.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Xinxin Jin, Wenli Bao, Han Zhang, Zheng Zheng, Meng Zhang
Summary: In this study, four-wave mixing (FWM) in graphdiyne (GDY) microfiber is demonstrated using synchronized dual-wavelength pump pulses obtained from a mode-locked fiber laser. The large nonlinear refractive index of GDY and the synchronized pump pulses contribute to a high conversion efficiency, which has potential applications in measuring the nonlinear coefficient gamma of nanomaterials-based devices.
PHOTONICS RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Kaiyu Zhang, Shangyuan Li, Zhengyang Xie, Zheng Zheng
Summary: We propose an all-opticalKa-band microwave long-distance dissemination system based on an optoelectronic oscillator (OEO). The system improves the phase noise and frequency stability of the received signal through phase conjugation and photomixing techniques.
IEEE PHOTONICS JOURNAL
(2022)
Article
Optics
Jianjun Yang, Jiansheng Liu, Ting Li, Jingyuan Hu, Jingyi Wang, Yuehan Wu, Shuguo Xie, Xin Zhao, Zheng Zheng
Summary: A dynamic spectroscopic characterization scheme for fast spectral variations based on dual asynchronous under-sampling with triple optical frequency combs is proposed and demonstrated. The scheme shows an increased frequency demodulation range while retaining accuracy and spectral measurement range.
OPTICS AND LASERS IN ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Chunlong Yu, Jiarong Zhang, Yihan Li, Xin Zhao, Zheng Zheng
Summary: This work proposes a photonic technique based on dual optical frequency comb for ultra-wideband channel sounding. It demonstrates high-resolution channel characterization and high-speed environment monitoring through proof-of-concept experiments, including continuous sounding of non-line-of-sight wireless channels and detection of a high-speed rotating electric fan. The technique showcases its practicality in assisting the integration of communication and sensing in the next generation of wireless communication, achieving coverage of a 12 GHz bandwidth wireless channel with electronics of less than 60 MHz bandwidth.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Tao Wang, Chen Tian, Kaiyu Zhang, Jinyang Liu, Zhengyang Xie, Xin Zhao, Shangyuan Li, Zheng Zheng
Summary: In this paper, a novel singlemode optoelectronic oscillator (OEO) based on phase conjugation is proposed and experimentally demonstrated. The OEO achieves long-term frequency stabilization through the use of photonic microwave phase-conjugate passive compensation. The nonlinear coupled double loop structure in the OEO enables single-mode oscillation.
Article
Physics, Multidisciplinary
Weifeng Cheng, Jiansheng Liu, Zheng Zheng, Xukun He, Bowen Zheng, Hualiang Zhang, Huachen Cui, Xiaoyu Zheng, Tao Zheng, Bruce E. Gnade, Jiangtao Cheng
COMMUNICATIONS PHYSICS
(2020)
