Results 101 to 110 of about 3,712 (221)

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

Soft Ferroelectrics in One Dimension: Ferroelectric Columnar Liquid Crystals

ChemPlusChem, Volume 91, Issue 6, June 2026.
Helical ferroelectric columnar liquid crystals (FCLCs) confine bistable axial polarization within individual columns. An electric field reversibly flips the macrodipole, enabling two nonvolatile states readable as “0” and “1.” This Cconcept highlights supramolecular locking and helical architectures that deliver genuine switching and long‐lived zero ...
Seongwon Park, Byoung‐Ki Cho
wiley   +1 more source

Particle sizing and flow measurement using self-mixing interferometry with a laser diode

, 2005
New applications are presented for self-mixing interferometry, based on optical scattering, feedback and self-mixing in laser diodes. The self-mixing interferometry method has been developed for the determination of sub-micron particle sizes and for the ...
Zakian, Christian, Zakian Dominguez, Christian, King, Terence, Dickinson, Mark; id_orcid   +3 more
core   +1 more source

Laser Doppler imaging through tissues phantoms by using self-mixing interferometry with a laser diode

, 2007
Laser Doppler imaging has been widely used for the evaluation of cutaneous blood flow. We report on how the self-mixing interferometry configuration with a laser diode is explored for what is belived to be the first time to generate flow maps.
Dickinson, M.; id_orcid, Zakian, C.
core   +1 more source

Depth monitoring during laser ablation of ceramic coatings with self-mixing interferometry

, 2015
In this paper self-mixing interferometry for measuring ablation depth during laser percussion drilling of TiAlN coating is studied. The accuracy of self-mixing interferometry measurements was investigated in a large processing range producing blind ...
DEMIR, ALI GOKHAN
core  

3D Surface Profiling via Direct End‐to‐End Regression With a Photonic Geometric Sensor

Laser &Photonics Reviews, Volume 20, Issue 12, 18 June 2026.
Measurements of microscale surface patterns are essential for quality control across semiconductor and biomedical industries, yet the development of miniaturized, intelligent systems remains constrained by the complexity and bulkiness of conventional benchtop metrology.
Ziyao Zhang, Yizhi Wang, Chunhui Yao, Huiyu Huang, Rui Ma, Xin Du, Wanlu Zhang, Zhitian Shi, Minjia Chen, Ting Yan, Liang Ming, Yuxiao Ye, Richard Penty, Qixiang Cheng   +13 more
wiley   +1 more source

Feasibility of Crosshole Seismic Tomography for Monitoring In Situ CO2 Mineral Storage in Basalts: A Rock Physics‐ and Seismic Modeling Study

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract In situ CO2 mineral storage is gaining increasing attention as a carbon capture and storage (CCS) technology to reduce anthropogenic CO2 emissions. So far, in situ CO2 mineral storage projects have been monitored predominantly using fluid‐ and isotope geochemical methods.
Jonas Simon Junker, Hansruedi Maurer, Alba Zappone, Sin‐Mei Wu, Anne Obermann   +4 more
wiley   +1 more source

Self-Mixing Interferometric Signal Enhancement Using Generative Adversarial Network for Laser Metric Sensing Applications

IEEE Access, 2019
Measurement performance of self-mixing interferometric (SMI) laser sensor can be significantly affected due to the presence of noise. In this case, conventional signal enhancement techniques yield compromised performance due to several limitations which ...
Imran Ahmed, Usman Zabit, Ahmad Salman
doaj   +1 more source

Rock Physics of the Critical Zone: Models, Inversion, and Interpretation

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract Rock physics models link geophysical measurements with subsurface petrophysical properties, such as porosity, mineral composition, and fluid saturation. While originally developed for hydrocarbon exploration, these models are increasingly applied in the near surface for quantitative interpretation of geophysical data.
Dario Grana, Brady A. Flinchum, Denys Grombacher, Andrew D. Parsekian, Clifford S. Riebe, W. Steven Holbrook   +5 more
wiley   +1 more source

Machine learning pipeline for microparticle size classification in self-mixing interferometric signals for flow cytometry

Frontiers in Sensors
Self-mixing interferometry (SMI) is an emerging optical sensing technique for detecting and classifying microparticles in non-contact and label-free flowmetry applications.
Sebastián Sierra-Alarcón, Julien Perchoux, Clément Tronche, Francis Jayat, Adam Quotb   +4 more
doaj   +1 more source