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
Optics
Xiaofan Zhao, Xin Tian, Meng Wang, Hongye Li, Binyu Rao, Zefeng Wang
Summary: A simple tandem inscription method for achieving wideband CTFBGs (WB-CTFBGs) is proposed and experimentally validated for the first time. The influence of key factors on the transmission spectrum is studied in detail by simulation. The validity of the proposed inscription technique has been demonstrated by comparing the Raman suppression effect in a high-power fiber laser system.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Xiaofan Zhao, Xin Tian, Qihao Hu, Binyu Rao, Meng Wang, Zefeng Wang
Summary: The design of a high-power fiber oscillator with CTFBGs effectively suppresses stimulated Raman scattering, increasing output power and extending transmission distance. Further improvements in CTFBG performance, such as lower inversion loss and wider rejection bandwidth, can enhance Raman suppression for power scaling and increased delivery distances of high-power fiber oscillators.
LASER PHYSICS LETTERS
(2021)
Article
Chemistry, Analytical
Takhmina Ayupova, Madina Shaimerdenova, Daniele Tosi
Summary: In this work, a gold-coated shallow-tapered chirped fiber Bragg grating (stCFBG) for dual refractive index (RI) and temperature sensing is presented. The stCFBG demonstrates high sensitivity, low cross-talk values, and is suitable for biosensing and chemical analyte detection.
Article
Engineering, Electrical & Electronic
Aleksandr A. Markvart, Leonid B. Liokumovich, Iurii O. Medvedev, Nikolai A. Ushakov
Summary: This study reports the first smartphone-based interrogation of a fiber Bragg grating sensor, utilizing the smartphone flashlight LED and a transmissive diffraction grating. The measurement sensitivity and resolution were validated through comparison with a commercial spectrometer and theoretical results. Additionally, the influence of modal noise on the smartphone-based fiber optic sensor interrogation system performance was considered for the first time.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Leandro Macedo, Edson A. Souza, Anselmo Frizera, Maria Jose Pontes, Carlos Marques, Arnaldo Leal-Junior
Summary: The paper presents the development and application of chirped fiber Bragg gratings (CFBGs) for dynamic and static measurements of beams. Numerical analysis and experiments were conducted to assess the natural frequencies, vibration modes, strain distribution, and force assessment capabilities of the proposed CFBG sensor. The results showed high determination coefficients, indicating the feasibility of using CFBGs for simultaneous assessment of force and strain distribution in dynamic and static conditions.
Article
Optics
Chaluvadi V. Naga Bhaskar, Subhradeep Pal, Prasant Kumar Pattnaik
Summary: This paper proposes and analyzes a narrow-band bandpass filter based on cascaded chirped fiber Bragg gratings (CFBG) that can operate in the C-band. By cascading two different chirped FBGs, the bandwidth can be significantly reduced and the reflectivity of the gratings can also change. The paper also discusses the application of the piecewise uniform approach (PUA) and presents an extension of PUA for tilted FBGs. The simulation results show that the proposed structures can achieve a narrowest FWHM of 1.56 nm and widest FWHM of 1.77 nm, and the reflectivity of the cascaded CFBG structures can vary between 0.81 and 0.39. The effect of temperature on the spectral characteristics is also studied, with the Bragg wavelength shifting by +1.701 nm for a 100 degrees C increase in operating temperature in the absence of strain. The thermal sensitivity of all the proposed structures is estimated to be 17.01 pm/degrees C.
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
Mechanics
Valerii Matveenko, Natalia Kosheleva, Grigorii Serovaev
Summary: The technique presented in the study allows for the detection of local damage in a material based on experimental strain values and numerical simulation results. It is suitable for controlled objects subjected to external loads that vary over time. Damage occurrence and location can be determined by analyzing changes in the ratios of strain values recorded by sensors simultaneously.
Article
Optics
Gang Xu, Bo He, Hongli Li, Xin Gui, Zhengying Li
Summary: An FBG pressure sensor was developed to monitor ship bottom liquid level during wave experiments, which showed good measuring ability and wide application prospect. The sensor had a sensitivity of 58.94 pm/kPa and a precision of 1.7 Pa, with temperature self-compensation function.
Article
Engineering, Electrical & Electronic
Antreas Theodosiou, Pericles Savva, Edward Mendoza, Michael F. Petrou, Kyriacos Kalli
Summary: This study successfully measured the relative humidity in ultra-high-performance concrete mixtures using a Bragg grating in a few-mode CYTOP polymer fiber, showing improved sensitivity coefficients compared to other sensors. The polymer optical sensing elements were able to monitor the relative humidity for eight days, demonstrating the potential for fiber optic sensing methods in concrete structures.
IEEE SENSORS JOURNAL
(2021)
Article
Biochemical Research Methods
Catia Tavares, Catia Leitao, Daniela Lo Presti, M. F. Domingues, Nelia Alberto, Hugo Silva, Paulo Antunes
Summary: This study proposes a 3D-printed sensor based on fiber Bragg grating (FBG) technology for monitoring respiratory rate (RR) and heart rate (HR). The selected sensor demonstrates high reproducibility and sensitivity to chest wall deformations caused by breathing and heartbeats, making it a valuable solution for easy fabrication.
BIOMEDICAL OPTICS EXPRESS
(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
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
A. A. Dmitriev, S. V. Varzhel, K. Grebnev, E. Anokhina
Summary: Strain gauges based on fiber Bragg gratings have gained popularity in both research and market due to their high sensitivity, response speed, immunity to electromagnetic radiation, and flexible characteristics. In this study, we investigated a strain gauge sensor based on n-pairs of chirped fiber Bragg gratings. The proposed sensor does not require spectral scanning of the gratings, simplifying its operation.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Physics, Applied
F. Sosnicki, M. Mikolajczyk, A. Golestani, M. Karpinski
APPLIED PHYSICS LETTERS
(2020)
Article
Optics
Alex O. C. Davis, Valerian Thiel, Brian J. Smith
Article
Optics
James Ashby, Valerian Thiel, Markus Allgaier, Peru D'Ornellas, Alex O. C. Davis, Brian J. Smith
Article
Physics, Multidisciplinary
Alex O. C. Davis, Mattia Walschaers, Valentina Parigi, Nicolas Treps
Summary: Mesoscopic photon counters offer practical advantages over single-photon level conditioning detectors in preparing non-Gaussian states. A novel approach involving displacement of the ancilla field into the regime where mesoscopic detectors can be used shows potential for preparing states with strong Wigner negativity at high rates under experimentally attainable conditions.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Sofiane Merkouche, Valerian Thiel, Alex O. C. Davis, Brian J. Smith
Summary: Entanglement is a unique property of quantum systems and an essential resource for many quantum technologies. This experiment demonstrates the ability to swap entanglement between two independent multimode time-frequency entangled sources, resulting in multiple Bell states.
PHYSICAL REVIEW LETTERS
(2022)
Article
Instruments & Instrumentation
Rohan Soman, Kaleeswaran Balasubramaniam, Ali Golestani, Michal Karpinski, Pawel Malinowski, Wieslaw Ostachowicz
Summary: Structural health monitoring (SHM) systems have the potential to reduce lifecycle costs of structures, with guided waves (GW) based techniques identified as the most promising for SHM.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Physics, Multidisciplinary
Ali Golestani, Alex O. C. Davis, Filip Sosnicki, Michal Mikolajczyk, Nicolas Treps, Michal Karpinski
Summary: This article introduces a new technique called Fourier transform chronometry, which acquires the temporal envelope of ultrashort optical pulses by measuring the frequency autocorrelation of the optical field. Experimental results show that this technique can successfully measure the pulse envelope of classical and single-photon light pulses.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Filip Sosnicki, Michal Mikolajczyk, Ali Golestani, Michal Karpinski
Summary: A Fresnel time lens is developed to bridge the gap between ultrafast and slow quantum information processing systems. It compresses the single-photon spectral bandwidth from picosecond to nanosecond timescales. This development enables the integration of different quantum information processing platforms and facilitates large-scale hybrid quantum information processing.
Article
Engineering, Electrical & Electronic
Adam Widomski, Stanislaw Stopinski, Krzysztof Anders, Ryszard Piramidowicz, Michal Karpinski
Summary: In this paper, we present a indium phosphide-based photonic integrated circuit that allows accurate control of the temporal and spectral profiles of optical pulses generated at the telecom wavelengths. The device enables simultaneous temporally and spectrally resolved measurements using single photon counting and has applications in multidimensional time-frequency quantum key distribution.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Alex O. C. Davis, Giacomo Sorelli, Valerian Thiel, Brian J. Smith
Summary: This study compared three illumination strategies for estimating the relative phase in a noisy, lossy interferometer, showing that using an entangled probe can lead to better parameter estimation precision. The research provides a theoretical foundation for the use of highly multimode entangled states of light for practical measurement tasks in experimentally challenging conditions.
Proceedings Paper
Engineering, Electrical & Electronic
Sofiane Merkouche, Valerian Thiel, Alex O. C. Davis, Brian J. Smith
Summary: A novel scheme is proposed for simultaneous heralding of multiple distinct pulse-mode entangled states through frequency-resolved Bell-state measurements. The heralded states are validated using spectral measurements and two-photon interference.
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2021)
Proceedings Paper
Engineering, Biomedical
Rohan N. Soman, Ali Golestani, Kaleeswaran Balasubramaniam, Michal Karpinski, Pawel H. Malinowski, Wieslaw Ostachowicz
Summary: This paper investigates the application of ellipse and hyperbola based techniques for FBG sensor networks, addressing specific challenges and providing comparative assessment using experimental data.
HEALTH MONITORING OF STRUCTURAL AND BIOLOGICAL SYSTEMS XV
(2021)
Review
Quantum Science & Technology
Michal Karpinski, Alex O. C. Davis, Filip Sosnicki, Valerian Thiel, Brian J. Smith
Summary: This article reviews methods for controlling and measuring quantum light pulses based on the deterministic application of targeted phases in the time and frequency domains. It also showcases recent demonstrations of quantum applications.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
