Results 21 to 30 of about 104,727 (309)
Remote Reflectivity Sensor for Industrial Applications
Sensors, 2021 A low-cost optical reflectivity sensor is proposed in this paper, able to detect the presence of objects or surface optical properties variations, at a distance of up to 20 m.
Federico Cavedo +2 more
doaj +1 more source
Distributed Brillouin Fiber Laser Sensor
27th International Conference on Optical Fiber Sensors, 2022 We present a distributed Brillouin fiber sensor that operates by exciting a series of discrete lasing modes. This approach provides inherently wide dynamic range (5mε) while the narrow linewidth lasing modes enable low noise (8nε/√Hz).
Joseph B. Murray +2 more
openaire +1 more source
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 +4 more
doaj +1 more source
Control of Frequency Combs with Passive Resonators
Sensors, 2023 Tailored optical frequency combs are generated by nesting passive etalons within mode-locked oscillators. In this work, the oscillator generates a comb of 6.8 GHz with 106 MHz side-bands.
James Hendrie +2 more
doaj +1 more source
Applied Sciences, 2022 A compact laser scatterometric device for determining the fat percentage of milk filling a cylindrical tube has been designed. The device operates by detecting the angular distribution of the scattered radiation of a semiconductor laser using an axial ...
Alexey V. Shkirin +5 more
doaj +1 more source
Low Power Greenhouse Gas Sensors for Unmanned Aerial Vehicles
Remote Sensing, 2012 We demonstrate compact, low power, lightweight laser-based sensors for measuring trace gas species in the atmosphere designed specifically for electronic unmanned aerial vehicle (UAV) platforms.
David J. Lary +8 more
doaj +1 more source
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 +3 more
openaire +1 more source
Modular microring laser cavity sensor
Optics Express, 2021 We propose and experimentally demonstrate a modular microring laser (MML) cavity for sensing applications. The proposed MML permits much more design freedom compared with a traditional simple ring cavity by decoupling the performance parameters into several regions in the cavity.
Lantian Chang +4 more
openaire +2 more sources
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 +5 more
doaj +1 more source
Laser chemosensor with rapid responsivity and inherent memory based on a polymer of intrinsic microporosity [PDF]
, 2011 This work explores the use of a polymer of intrinsic microporosity (PIM-1) as the active layer within a laser sensor to detect nitroaromatic-based explosive vapors.
Samuel, Ifor D. W. +10 more
core +1 more source