Results 111 to 120 of about 3,712 (221)

Phase Detector for Laser Phase Perturbation Demodulation

Scientific Bulletin of Valahia University: Materials and Mechanics
Laser interferometry is a powerful tool for vibration measurement. It makes it especially suited for measurement of small vibrations which would otherwise be interfered with by contact-based methods.This paper is devoted to the design and implementation ...
Abdulhamid Mohanad
doaj   +1 more source

High-sensitivity vibrometer based on FM self-mixing interferometry

, 2019
We present a new optical instrument for vibrations measurement, based on a method to read the frequency modulation of a laser diode self-mixing interferometer.
BANDI, FEDERICO, Norgia M., Pesatori A., Donati S.   +3 more
core   +1 more source

FPGA based filter design for self-mixing interferometry signals

, 2011
Self-mixing interferometry (SMI) signals are observed from a sensing system consisting of a laser diode with external optical feedbacks. SMI signals carry the information associated to both of the displacement and parameters of the SL.
Jiangtao Xi (19588198), Yanguang Yu (19588201), Yuan Sun (20124843), Wenbing Fan (20124900)   +3 more
core  

Optical depth sectioning in self-mixing lasers for biomedical applications

, 2015
Illumination in scattering media provides a general means to provide optical diagnosis in a noninvasive, painless and low cost approach, which has pushed forward the interest of the field both in biomedical and industrial applications.
Cabedo Bru, Josep
core   +1 more source

Membrane-Mediated Conversion of Near-Infrared Amplitude Modulation into the Self-Mixing Signal of a Terahertz Quantum Cascade Laser

Photonics
A platform for converting near-infrared (NIR) laser power modulation into the self-mixing (SM) signal of a quantum cascade laser (QCL) operating at terahertz (THz) frequencies is introduced.
Paolo Vezio, Andrea Ottomaniello, Leonardo Vicarelli, Mohammed Salih, Lianhe Li, Edmund Linfield, Paul Dean, Virgilio Mattoli, Alessandro Pitanti, Alessandro Tredicucci   +9 more
doaj   +1 more source

Biomedical applications of terahertz self-mixing interferometry [PDF]

SPIE Newsroom, 2014
Rakic, Aleksandar, Karl Bertling, Yah Leng Lim, Wilson, Stephen J., Milan Nikolic, Thomas Taimre, Dragan Indjin, Alexander Valavanis, Edmund H. Linfield, A. Giles Davies, Graeme Walker, Blake Ferguson, Tarl Prow, Helmut Schaider, Soyer, H. Peter   +14 more
openaire   +4 more sources

Characterization Speckle Effect on Measurement of Blood Flow Using Sensor Based on Self-Mixing Interferometry

, 2019
The applications of Self-Mixing Interferometry (SMI) have been popular in many fields, including biomedical signals. The self-mixing effect occurs from the coherent back-coupling of the reflected or scattered lights from a target surface.
Endarko, Endarko; Department of Physics, Institut Teknologi Sepuluh Nopember, Rubiyanto, Agus; Department of Physics, Institut Teknologi Sepuluh Nopember, Dzulfikar, Ahmad Zaki; Department of Physics, Institut Teknologi Sepuluh Nopember   +2 more
core   +1 more source

Laser feedback interferometry: a tutorial on the self-mixing effect for coherent sensing

, 2015
This tutorial presents a guided tour of laser feedback interferometry, from its origin and early development through its implementation to a slew of sensing applications, including displacement, distance, velocity, flow, refractive index, and laser ...
Taimre, Thomas, Lim, Yah Leng, Rakic, Aleksandar, Bertling, Karl, Rakic, Aleksandar D., Nikolic, Milan, Bosch, Thierry   +6 more
core   +1 more source

Self-mixing interferometry for icing condition detection

Nous proposons ici une méthode permettant d'effectuer la détection de gouttelettes d'eau en condition atmosphérique de façon fiable et robuste. Pour cela, nous avons choisi de tester l'application de l'interférométrie self-mixing à cette problématique ...
Matha, Robin
core  

Terahertz near-field microscopy of metallic circular split ring resonators with graphene in the gap

Scientific Reports
Optical resonators are fundamental building blocks of photonic systems, enabling meta-surfaces, sensors, and transmission filters to be developed for a range of applications. Sub-wavelength size (
Chiara Schiattarella, Alessandra Di Gaspare, Leonardo Viti, M. Alejandro Justo Guerrero, Lianhe H. Li, Mohammed Salih, A. Giles Davies, Edmund H. Linfield, Jincan Zhang, Hamideh Ramezani, Andrea C. Ferrari, Miriam S. Vitiello   +11 more
doaj   +1 more source