Results 31 to 40 of about 3,266 (205)

OPTICAL FEEDBACK INTERFEROMETRY: FROM BASICS TO APPLICATIONS OF LASER FLOWMETRY

, 2017
Optical feedback interferometry (OFI) is a contactless technique that is employed for measuring parameters related to object's motion. The light emitted by a laser is backreflected or scattered from a moving object and a small portion of the scattered waves re-enters the laser cavity and impacts the laser's emission properties.
Ramírez-Miquet, E, Perchoux, Julien, da Costa Moreira, Raul, Zhao, Y., Luna Arriaga, Antonio, Tronche, Clément, Sotolongo-Costa, O.   +6 more
core   +3 more sources

Laser Optical Feedback Turns 60 [PDF]

, 2023
As soon as a laser is fired, some of the emitted light is scattered backward and coupled with the cavity modes, causing instability. However, already in March 1962, Kleinman and Kisliuk [1] suggested that controlled back reflection from an external ...
Columbo L. L., Dabbicco M., Perchoux J.
core   +1 more source

Sensing by Dynamics of Lasers with External Optical Feedback: A Review

Photonics, 2022
External optical feedback (EOF) has great impacts on the properties of lasers. It influences the stable operation of lasers. However, various applications based on lasers with EOF have been developed.
Bin Liu, Yangfan Jiang, Haining Ji
doaj   +1 more source

Robust integrated optical feedback interferometry via variable optical attenuation

Optics Express
International audienceRobust operation of optical feedback interferometry-based instruments requires controlling the amount of light that is reflected back into the laser.
Arshad, Ayesha, Halir, Robert, Zabit, Usman, Bernal, Olivier, Deleau, Clement   +4 more
core   +2 more sources

Distance Measurement with Harmonic Modulation of Self-Mixing Laser Wavelength at External Optical Feedback [PDF]

Известия Саратовского университета. Новая серия: Физика, 2020
Background and Objectives: Self-mixing interferometry of absolute distances is currently well represented by the method of frequency modulation of the laser diode supply current (FMCW). In recent years a harmonic modulation of the power current of a self-
Skripal, Anatoly Vladimirovich, Dobdin, Sergey Iur'evich, Dzhafarov, Aleksey Vladimirovich, Sadchikova, Karina Armenakovna, Feklistov, Vladimir Borisovich   +4 more
doaj   +1 more source

Feedback Regimes of LFI Sensors: Experimental Investigations

Sensors, 2022
In this article, we revisit the concept of optical feedback regimes in diode lasers and explore each regime experimentally from a somewhat unconventional point of view by relating the feedback regimes to the laser bias current and its optical feedback ...
Karl Bertling, Xiaoqiong Qi, Thomas Taimre, Yah Leng Lim, Aleksandar D. Rakić   +4 more
doaj   +1 more source

An absolute ranging method based on FMCW principle using dual laser interferometry

AIP Advances, 2023
The FMCW (Frequency Modulated Continuous Wave) laser interferometer can achieve high-precision displacement measurement by calculating the phase of the interference signal.
Bin Sun, Chao Wang, Junfang Song
doaj   +1 more source

Fringe Detection and Displacement Sensing for Variable Optical Feedback-Based Self-Mixing Interferometry by Using Deep Neural Networks

Sensors, 2022
Laser feedback-based self-mixing interferometry (SMI) is a promising technique for displacement sensing. However, commercial deployment of such sensors is being held back due to reduced performance in case of variable optical feedback which invariably ...
Asra Abid Siddiqui, Usman Zabit, Olivier D. Bernal   +2 more
doaj   +1 more source

In situ measurement of particle flow during fiber laser additive manufacturing with powder feeding

Results in Physics, 2022
In situ measurement of particle flow is a promising tool to visualize how the particles affect the power feeding laser additive manufacturing (PFLAM).
Jianglin Zou, Zi Wang, Yu Zhao, Xue Han, Jinjie Gong   +4 more
doaj   +1 more source

All-Fiber Laser Feedback Interferometry for Sequential Sensing of In-Plane and Out-of-Plane Displacements

Photonics, 2023
In this paper, an all-fiber laser feedback interferometer (LFI) with a diffraction grating was developed for sequential measurement of in-plane and out-of-plane displacements without changing the optical arrangement. When the light emitted from an erbium-
Zhanwu Xie, Meng Zhang, Jie Li, Wei Xia, Dongmei Guo   +4 more
doaj   +1 more source