Results 21 to 30 of about 82,150 (265)

Phonon-Laser Ultrasensitive Force Sensor [PDF]

Physical Review Applied, 2021
Developing nano-mechanical oscillators for ultrasensitive force detection is of great importance in exploring science. We report our achievement of ultrasensitive detection of the external force regarding the radio-frequency electric field by a nano-sensor made of a single trapped $^{40}$Ca$^{+}$ ion under injection-locking, where squeezing is ...
Zhichao Liu, Yaqi Wei, Liang Chen, Ji Li, Shuangqing Dai, Fei Zhou, Mang Feng   +6 more
openaire   +2 more sources

Sensitive Spectroscopy of Acetone Using a Widely Tunable External-Cavity Quantum Cascade Laser

Sensors, 2018
We employed a single-mode, widely tunable (~300 cm−1) external-cavity quantum cascade laser operating around 8 µm for broadband direct absorption spectroscopy and wavelength modulation spectroscopy where a modulation frequency of 50 kHz was ...
Faisal Nadeem, Julien Mandon, Amir Khodabakhsh, Simona M. Cristescu, Frans J. M. Harren   +4 more
doaj   +1 more source

Fiber Laser Sensor Configurations for Refractive Index, Temperature and Strain: A Review

Photonics, 2023
Fiber laser sensors have been present for almost four decades as versatile sensing devices with a simple demodulation process, high sensitivity, and competitive resolution.
D. Jauregui-Vazquez, J. A. Alvarez-Chavez, T. Lozano-Hernandez, J. M. Estudillo-Ayala, J. M. Sierra-Hernandez, H. L. Offerhaus   +5 more
doaj   +1 more source

High-Sensitivity Ammonia Sensors with Carbon Nanowall Active Material via Laser-Induced Transfer

Nanomaterials, 2022
Ammonia sensors with high sensitivity, reproducible response, and low cost are of paramount importance for medicine, i.e., being a biomarker to diagnose lung and renal conditions, and agriculture, given that fertilizer application and livestock manure ...
Alexandra Palla-Papavlu, Sorin Vizireanu, Mihaela Filipescu, Thomas Lippert   +3 more
doaj   +1 more source

Deep Integration of Fiber-Optic Communication and Sensing Systems Using Forward-Transmission Distributed Vibration Sensing and on–off Keying

Sensors
The deep integration of communication and sensing technology in fiber-optic systems has been highly sought after in recent years, with the aim of rapid and cost-effective large-scale upgrading of existing communication cables in order to monitor ocean ...
Runlong Zhu, Xing Rao, Shangwei Dai, Ming Chen, Guoqiang Liu, Hanjie Liu, Rendong Xu, Shuqing Chen, George Y. Chen, Yiping Wang   +9 more
doaj   +1 more source

Study of QCL Laser Sources for the Realization of Advanced Sensors

Sensors, 2015
We study the nonlinear dynamics of a quantum cascade laser (QCL) with a strong reinjection provided by the feedback from two external targets in a double cavity configuration.
Giuseppe de Risi, Lorenzo Luigi Columbo, Massimo Brambilla   +2 more
doaj   +1 more source

Measuring Linewidth Enhancement Factor by Relaxation Oscillation Frequency in a Laser with Optical Feedback

Sensors, 2018
This paper presents a new method for measuring the linewidth enhancement factor (alpha factor) by the relaxation oscillation (RO) frequency of a laser with external optical feedback (EOF).
Yuxi Ruan, Bin Liu, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong   +5 more
doaj   +1 more source

Ramie Fabric Treated with Carboxymethylcellulose and Laser Engraved for Strain and Humidity Sensing

Micromachines, 2022
Wearable fabric sensors have attracted enormous attention due to their huge potential in human health and activity monitoring, human–machine interaction and the Internet of Things (IoT).
Shangxuan Shi, Jiao Liang, Chenkai Qu, Shangbi Chen, Bin Sheng   +4 more
doaj   +1 more source

Laser Range Sensors

Defence Science Journal, 2007
This paper presents the design aspects of laser range finders and proximity sensors beingdeveloped at IRDE for different applications. The principle used in most of the laser rangefinders is pulse echo or time-of-flight measurement. Optical triangulation is used in proximitysensors while techniques like phase detection and interferometry are employed ...
K.C. Bahuguna, Prabhat Sharma, N.S. Vasan, S.P. Gaba   +3 more
openaire   +1 more source

Biosensors for Brain Trauma and Dual Laser Doppler Flowmetry: Enoxaparin Simultaneously Reduces Stroke-Induced Dopamine and Blood Flow while Enhancing Serotonin and Blood Flow in Motor Neurons of Brain, In Vivo

Sensors, 2010
Neuromolecular Imaging (NMI) based on adsorptive electrochemistry, combined with Dual Laser Doppler Flowmetry (LDF) is presented herein to investigate the brain neurochemistry affected by enoxaparin (Lovenox®), an antiplatelet/antithrombotic medication ...
Edwin H. Kolodny, Patricia A. Broderick
doaj   +1 more source