Article
Engineering, Electrical & Electronic
Zhihai Liu, Baichuan Zhao, Yu Zhang, Yaxun Zhang, Chunyu Sha, Jun Yang, Libo Yuan
Summary: A new method for fabricating a Fabry-Perot interferometer sensor using photopolymerizable materials is proposed and demonstrated in this study. By incorporating PDMS into the photopolymer material, the sensor is proven to have the ability to sense various parameters, with the relationship between PDMS concentration and temperature sensitivity being investigated.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Optics
Shinya Kato, Takao Aoki
Summary: We demonstrate the realization of single-frequency stimulated Brillouin lasing in short fiber Fabry-Perot resonators. By adjusting the parameters of fiber Bragg gratings, we avoid cascaded lasing and achieve efficient, compact, narrow-linewidth light sources.
Article
Engineering, Electrical & Electronic
Xinruo Yi, Kehao Zhao, Kevin P. Chen
Summary: This work presents multiplexable fiber optical sensors for multiple-point pH measurements. By using a femtosecond laser direct writing approach, an array of intrinsic Fabry-Peirot interferometer (IFPI) sensors was inscribed in standard single-mode fibers. A sol-gel dip coating process was employed to deposit Palladium-doped Titanium Dioxide (Pd-TiO2) sensory film on IFPI sensors for pH measurement, while an uncoated sensor was used to measure temperature of aquatic solutions to eliminate the influence of temperature fluctuation on pH measurements. Pd nanoparticles in the sensory films act as a catalyst to convert hydrogen ions in aquatic solutions to Pd hydride, which produces strains on IFPI sensors. White light interferometry demodulation algorithm was applied to resolve the strain exerted on IFPI sensors induced by pH value changes in aquatic solution. The presented sensor exhibited reversible and reproducible response in aquatic solutions with pH values ranging from 1.0 to 7.0 at room temperature. The response time of the pH sensors was approximately 7 seconds for all measurements conducted. The technology demonstrated in this paper has the potential to perform multi-point pH and temperature measurements using a single fiber.
IEEE SENSORS JOURNAL
(2022)
Article
Multidisciplinary Sciences
Pablo Roldan-Varona, Rosa Ana Perez-Herrera, Luis Rodriguez-Cobo, Luis Reyes-Gonzalez, Manuel Lopez-Amo, Jose Miguel Lopez-Higuera
Summary: A novel optical fiber sensor capable of measuring liquid level and refractive index has been designed, manufactured and demonstrated in this work. By processing a silica capillary hollow-core fiber with a femtosecond laser, the system can achieve a high resolution of 4 mu m for liquid level measurement. In the future, it has the potential to measure the level of immiscible liquids as well.
SCIENTIFIC REPORTS
(2021)
Article
Optics
Jonathan Musgrave, Shu-Wei Huang, Mingming Nie
Summary: Optical frequency combs, especially microcombs generated from fiber Fabry-Perot microresonators, have significant applications in science and technology. They offer compact size, low cost, high-energy efficiency, and large comb spacing, making them attractive for various fields.
Correction
Optics
Meng Ding, Eric Numkam Fokoua, John R. Hayes, Hesham Sakr, Peter Horak, Francesco Poletti, David J. Richardson, Radan Slavik
Summary: In the original publication of our research article, we found an error that needs to be corrected. We apologize for any confusion caused by this error. The correction does not affect the overall conclusions of the paper.
Article
Instruments & Instrumentation
Zhuoyue Li, Zengling Ran, Xianguo Qing, Zhengxi He, Yaqin Xiao, Tingting Yang, Xiu He, Jialiang Zhu, Peng He, Sijie Xu
Summary: The study found that the pressure sensitivity of FP sensors remained stable after irradiation, while the temperature sensitivity of FBG sensors was unstable and requires further research. This suggests the potential application of FP sensors in gamma radiation environments.
Article
Engineering, Electrical & Electronic
Praveen Kumar Revuri, Konrad Walus, Vincent P. Wallace, K. K. M. B. Dilusha Silva, Adrian Keating, Lorenzo Faraone, Mariusz Martyniuk
Summary: This work demonstrates the fabrication and evaluation of Fabry-Perot interferometers (FPIs) in the terahertz range using 3D printing. The 3D printed FPIs exhibit low cost, rapid prototyping, and repeatability. Transmission measurements show good agreement with simulated response, and the achieved spectral performance is sufficient for many applications in the terahertz range.
JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES
(2022)
Article
Engineering, Electrical & Electronic
Rodolfo Martinez-Manuel, Jonathan Esquivel-Hernandez, Sophie LaRochelle
Summary: A novel method is presented to reduce the nonlinearity effect of a wavelength scanning diode laser in a low-reflectivity Fabry-Perot interferometer. The proposed method improves system resolution and achieves a temperature insensitive sensing system. It is demonstrated by measuring the thermo-optic coefficient of liquid samples and presenting long-term performance experimental results.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Multidisciplinary
Nicolas Riesen, Nicholas Phillips, Linh Nguyen, Stephen C. Warren-Smith, Craig Priest, David G. Lancaster
Summary: This paper provides an analysis of fiber-optic Fabry-Perot interferometers using collimating graded-index fiber tips instead of standard single-mode fibers. It shows that the use of collimated GIF tips can significantly increase fringe visibility at 1550 nm. The study also explores the effects of using capillaries to align the fibers and offers easily accessible design guidelines for fabricating GIF-based devices at 1550 nm.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2021)
Article
Optics
Yuan Wang, Xiping Zhu, Hailin Chen, Chao Jiang, Xiaoshan Guo, Simei Sun
Summary: In this study, we demonstrate a highly sensitive humidity sensor using a cascaded Fabry-Perot interferometer to generate the Vernier effect. The sensor structure consists of a capillary, a polyimide film, and a mixing cavity. Experimental results show that the sensor has a relative humidity sensitivity of 344.4 pm/% RH, significantly higher than that of a sensor using interference fringe measurement.
Article
Engineering, Electrical & Electronic
Yang Yang, Mohan Wang, Zhihao Yu, Qingxu Yu, Kevin P. Chen
Summary: This paper presents fabrication technique and demodulation algorithm developments for using a multiplexable IFPI fiber sensor array for distributed vibration measurements at high temperatures. The performance and stabilities of the sensor array were characterized from room temperatures to 800 degrees C, demonstrating its potential for applications in harsh environments.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Optics
Sixiang Ran, Wenjun Ni, Chunyong Yang, Zhongke Zhao, Shun Wang, Perry Ping Shum
Summary: We propose a novel method for high temperature sensing calibration based on alterable interferential fineness in Bragg hollow core fiber (BHCF). The sensing structure consists of BHCF sandwiched by two sections of different length. The high-fineness fringes formed by ARROW are used for high temperature measurement, while the low-fineness fringes induced by short F-P cavity are exploited for temperature calibration.
Article
Engineering, Electrical & Electronic
Weiguo Jiang, Yundong Zhang, Fuxing Zhu
Summary: This study presents the design and experimental demonstration of a 3rd-order reflective hybrid interleaver based on Fabry-Perot cavity assisted Michelson interferometer. The performance of the interleaver is influenced by loss and transmission coefficient, and its flatness and rectangularity increase with the order.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Peng Zhang, Ying Wang, Yuru Chen, Xiaohua Lei, Yi Qi, Jianghua Feng, Xianming Liu
Summary: The proposed method utilizes coarse spectrum sampling for fast real-time demodulation of fiber optic EFPI sensor signals, combining FFT and MLE algorithms for high accuracy measurements, with relatively low errors demonstrated in experiments.
Article
Physics, Condensed Matter
Hirokazu Masai, Yohei Onodera, Shinji Kohara, Takahiro Ohkubo, Akitoshi Koreeda, Yasuhiro Fujii, Masanori Koshimizu, Masato Yamawaki
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2020)
Article
Multidisciplinary Sciences
Hirokazu Masai, Hiroaki Sakurai, Akitoshi Koreeda, Yasuhiro Fujii, Takahiro Ohkubo, Takamichi Miyazaki, Tomoko Akai
SCIENTIFIC REPORTS
(2020)
Article
Chemistry, Physical
Keiichiro Shiraga, Yasuhiro Fujii, Akitoshi Koreeda, Koichiro Tanaka, Takashi Arikawa, Yuichi Ogawa
Summary: This study compared the broadband terahertz and low-frequency Raman spectroscopy of liquid water to address challenges regarding the interpretation of the intermolecular stretching mode. The experiment demonstrated a significant redshift and broadening in the intermolecular stretching mode obtained via terahertz spectroscopy compared to Raman, attributed to enhanced dynamical collectivity. The temperature and isotope dependences emphasize the role of oscillation mass in determining the intermolecular stretching lineshape, while quantum effects are important in both terahertz and low-frequency Raman spectra.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Multidisciplinary Sciences
Hirokazu Masai, Takahiro Ohkubo, Yasuhiro Fujii, Akitoshi Koreeda, Takayuki Yanagida, Toshiaki Ina, Kenji Kintaka
Summary: The study investigates the correlations between structural and physical properties of Ce-doped strontium borate glasses, finding that density-driven molar volume is suitable for evaluating structural data while chemical composition is better for evaluating optical and luminescent data. Borate-rich glasses exhibit stronger luminescence due to Ce3+ and internal quantum efficiency originates from the local coordination states of Ce3+ centers. Comparing numerical data of the matrix helps ensure homogeneous doping of amorphous materials by activators and determines the origin of physical properties.
SCIENTIFIC REPORTS
(2021)
Article
Spectroscopy
Junlan Zhong, Shin Nakagawa, Karolina Kaczmarska, Wakana Terao, Beata Grabowska, Yasuhiro Fujii, Akitoshi Koreeda, Shinji Kohara, Hisanori Tanimoto, Hiroko Tokoro, Shin-Ichi Ohkoshi, Jae-Hyeon Ko, Yu Duan, Tatsuya Mori
Summary: The vibrational density of states of CM-starch was investigated by THz time-domain spectroscopy, showing similarities to glucose-based polymer glasses. The BP frequency showed almost no dependence on temperature, while the chain length of the glass affected the BP frequency.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Physics, Applied
Eiichi Oishi, Yasuhiro Fujii, Akitoshi Koreeda, Takuya Satoh, Toshimitsu Ito
Summary: In this study, quasi-elastic light scattering (QELS) in BiFeO3 was observed using Raman spectroscopy over a temperature range of 300-860 K. The QELS exhibited two components: narrow and broad ones. The temperature dependence of the intensity and linewidth of the broad component differed below and beyond the Neel point, suggesting a possible magnetic origin of the broad QELS.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Ceramics
Kyoko Okada, Akihiko Kajinami, Fumiko Kugai, Seizou Obata, Aimi Kato, Yasuhiro Fujii, Akitoshi Koreeda, Norimasa Umesaki, Keizo Sato, Yoshiharu Sakurai
Summary: This study observed and analyzed the glass produced by the in-flight-melting method using multiple techniques. It discovered specific oxygen chemical states and unique fiber structures that differ from traditional glass and natural silicate glass.
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Shin Nakagawa, Yasuhiro Fujii, Suguru Kitani, Hitoshi Kawaji, Akitoshi Koreeda, Soo Han Oh, Jae-Hyeon Ko, Yohei Yamamoto, Tatsuya Mori
Summary: The study found the existence of boson peak and fracton in polymethyl methacrylate, with the determination of infrared light-vibration coupling constant and Raman coupling constant. The fracton was observed as a linear region in log-log plots of the coupling constants.
2021 46TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Soo Han Oh, Shin Nakagawa, Yu Duan, Yasuhiro Fujii, Suguru Kitani, Akitoshi Koreeda, Jae-Hyeon Ko, Yohei Yamamoto, Tatsuya Mori
Summary: The complex dielectric constant of a lithium chloride aqueous solution was determined at low temperatures using terahertz time-domain spectroscopy, revealing that the boson peak frequency is determined by hydrogen bonds between water molecules.
2021 46TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Yu Duan, Yasuhiro Fujii, Suguru Kitani, Hiroyuki Hijiya, Akitoshi Koreeda, Jae-Hyeon Ko, Yohei Yamamoto, Tatsuya Mori
Summary: The study investigated different compositions of sodium silicate glasses using terahertz time-domain spectroscopy, low-frequency Raman scattering, and low-temperature specific heat measurements. The researchers successfully detected the behavior of the boson peak (BP) in all measurements, and found that the BP frequency is insensitive to Na2O composition. Additionally, comparing the Raman spectrum and terahertz absorption spectrum confirmed that the BP vibration mode is a combination of different fundamental vibration modes.
2021 46TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Jeonghyuk Kim, Tatsuya Mori, Seiji Inaba, Takanari Kashiwagi, Yasuhiro Fujii, Suguru Kitani, Hitoshi Kawaji, Akitoshi Koreeda, Soo Han Oh, Jae-Hyeon Ko, Seiji Kojima
2020 45TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Tatsuya Mori, Maiko Masubuchi, Yasuhiro Fujii, Suguru Kitani, Shinji Kohara, Akihiko Hirata, Hiroko Tokoro, Shin-ichi Ohkoshi, Akitoshi Koreeda, Hitoshi Kawaji, Seiji Kojima
2020 45TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)
(2020)
Proceedings Paper
Engineering, Electrical & Electronic
Shin Nakagawa, Tatsuya Mori, Yasuhiro Fujii, Suguru Kitani, Akitoshi Koreeda, Hitoshi Kawaji, Jae-Hyeon Ko, Seiji Kojima
2020 45TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ)
(2020)
Article
Materials Science, Ceramics
Hirokazu Masai, Shinji Kohara, Yohei Onodera, Akitoshi Koreeda, Kazuya Saito, Edison Haruhico Sekiya, Naoyuki Kitamura
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2020)
Article
Materials Science, Ceramics
Kyoko Okada, Akihiko Kajinami, Fumiko Kugai, Seizo Obata, Aimi Kato, Yasuhiro Fujii, Akitoshi Koreeda, Norimasa Umesaki, Keizo Sato, Yoshiharu Sakurai
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
(2020)
