Results 111 to 120 of about 453,948 (232)

An analytical method to find the optimal parameters for gas detectors based on correlation spectroscopy using a Fabry-Perot interferometer

, 2005
Several designs of infrared absorption based gas detector use a Fabry-Perot Interferometer (FPI) to modulate the incident light. In these systems, generally the FPI's fringes are matched with very well defined rotational absorption lines of a target ...
SPIE Europe Internation Symposium on Optical System Design, Rutt, Harvey, Vargas-Rodríguez, Everardo   +2 more
core   +1 more source

Construction optimization and functional applications of fluorescent nanodiamonds

Responsive Materials, EarlyView.
This review summarizes synthesis, surface modification and optical properties of fluorescent nanodiamonds. Their advances in quantum sensing, single‐photon emission and biomedicine are discussed, and existing challenges and future directions are presented.
Yunpeng Yang, Sen Zhang, Chao Chen, Wensi Yang, Zuanquan Chen, Rui Fan, Linlin Liu, Benjian Liu, Kang Liu, Zhibo Zhang, Bing Dai, Jiaqi Zhu   +11 more
wiley   +1 more source

Significance of Fabry-Perot Cavities for Space Gravitational Wave Antenna DECIGO

Galaxies
DECIGO is a future Japanese project for the detection of gravitational waves in space. To conduct various scientific missions, including the verification of cosmic inflation through the detection of primordial gravitational waves as the main objective ...
Kenji Tsuji, Tomohiro Ishikawa, Kurumi Umemura, Yuki Kawasaki, Shoki Iwaguchi, Ryuma Shimizu, Masaki Ando, Seiji Kawamura   +7 more
doaj   +1 more source

Intelligent Continuum Micromachines in Complex Confined Spaces

SmartBot, EarlyView.
The cover depicts a conceptual design for an intelligent continuum micromachine entering a target capsule used in fusion‐energy research through its slender gas‐fill tube. By combining route‐adaptive deformation, embedded sensing, and a functional end effector, the robot could inspect hidden defects, assess local conditions, and support localized ...
Huayang Sai, Yunyue Yang, Shuxing Xu, Jinbo Hu, Jiliang Wang, Zhehao Gan, Wei Tang, Tian‐Yun Huang   +7 more
wiley   +1 more source

Perforation Enhances Sound Insulation in Plate Lattice Metamaterials

Small, EarlyView.
Herein, perforations are engineered into face‐centered cubic plate lattice metamaterials to convert normally detrimental openings into acoustically active features. Experiments, finite‐element analyses, and a reduced‐order transfer‐matrix model show that selected perforation geometries activate Helmholtz‐like and cavity‐mediated resonances, enhancing ...
Jing Heng Tan, Chenxu Liu, Zhendong Li, Xinwei Li   +3 more
wiley   +1 more source

Very high Q frequency-locked Fabry–Perot cavity

, 1996
We report measurements on a 1.75 m long Fabry-Perot cavity locked to a Nd:YAG tunable laser using the Pound-Drever technique. The cavity decay time was measured to be about 291 μs corresponding to a quality factor Q of about 5X1011, the highest value ...
MICOSSI P, CARUGNO G, RUOSO G, MARIGO S, RIZZO R, DELLA VALLE, FEDERICO, ZAVATTINI E., PERRONE F, ONOFRIO R, CARUSOTTO S, PAPA M, POLACCO E, PACE P, CANTATORE, GIOVANNI, MILOTTI, EDOARDO, ZAVATTINI G, DE RIVA A. M   +16 more
core   +2 more sources

A Dual‐Frequency Sensitivity Model for Optical Fibre Ultrasonic Sensors in Power Transformer Partial Discharge Detection

High Voltage, EarlyView.
ABSTRACT The detection of partial discharges (PD) on the power transformer tank demands higher sensitivity in ultrasonic detection. To target the detection frequency band for sensor optimisation and enhance sensitivity, this paper presents a dual‐frequency sensitivity model for optical fibre ultrasonic sensors.
Sihan Wang, Jihang Sun, Jialin Wang, Bin Wei, Guoming Ma   +4 more
wiley   +1 more source

Advanced Sensing Materials and Their Applications for Power Sensors

High Voltage, EarlyView.
ABSTRACT The construction of new‐generation power systems imposes stringent requirements on the safety and reliability of critical equipment, making accurate state perception essential for grid security and digital transformation. Sensing materials fundamentally determine sensor performance in terms of sensitivity, bandwidth, environmental adaptability
Weigen Chen, Yuxuan Song, Jun Hu, Xia Chen, Han Peng, Cheng He, Xing Fan, Wentao Zhang, Shijie Cheng   +8 more
wiley   +1 more source

Phase Correcting Convoluted FSS Reflectors to Increase Directivity in Fabry-Perot Cavity Antennas [PDF]

This paper investigates a method to improve the aperture phase distribution of a Fabry–Perot cavity antenna (FPCA), using convoluted frequency selective surfaces (FSS) to improve uniformity of electromagnetic (EM) wave phase inside the cavity, thus ...
O’Keefe, SG, Espinosa, HG, Catton, G, Dewani, A   +3 more
core   +1 more source

Tunable Near-Infrared Transparent Bands Based on Cascaded Fabry–Perot Cavities Containing Phase Change Materials

Photonics
In this paper, we construct a near-infrared Fabry–Perot cavity composed of two sodium (Na) layers and an antimony trisulfide (Sb2S3) layer. By cascading two Fabry–Perot cavities, the transmittance peak splits into two transmittance peaks due to the ...
Yuchun She, Kaichan Zhong, Manni Tu, Shuyuan Xiao, Zhanxu Chen, Yuehua An, Dejun Liu, Feng Wu   +7 more
doaj   +1 more source