Results 91 to 100 of about 3,266 (205)

Field Programmable Gate Array‐Based Control Systems for Highly Stable Laser Applications

Advanced Photonics Research, Volume 7, Issue 4, April 2026.
This review highlights the transition from analog to FPGA‐based digital architectures for laser frequency stabilization, noting their superior latency and flexibility. It focuses on Modulation Transfer Spectroscopy (MTS) as a robust, background‐free method for high‐precision locking that minimizes residual amplitude modulation.
Prosenjit Majumder, Rakesh Tirupathi
wiley   +1 more source

Coherent control of scattering and absorption in organic microresonators [PDF]

EPJ Web of Conferences
We study coherent perfect absorption in organic microcavity resonators and extend these principles and our findings to more complex microresonator systems that, beyond absorption, also possess additional cavity energy dissipation mechanisms.
Pietsch Frithjof, Lindenthal Jakob, Antrack Tobias, Benduhn Johannes, Sudzius Markas, Leo Karl   +5 more
doaj   +1 more source

Fabricating optical fibre-top cantilevers for temperature sensing

, 2014
In this paper, we propose techniques to fabricate micro-cantilevers onto the end of standard single mode optical fibres using a combination of picosecond laser machining and focused ion beam milling techniques and demonstrate their use as temperature ...
Li, Jun, Sun, Jining, Miliar, M M, Hand, D P; id_orcid, Macpherson, W N; id_orcid, Albri, F, Maier, R R J; id_orcid   +6 more
core   +1 more source

Concurrent Reflectance Confocal Microscopy and Laser Doppler Flowmetry to Improve Skin Cancer Imaging: A Monte Carlo Model and Experimental Validation

Sensors, 2016
Optical interrogation of suspicious skin lesions is standard care in the management of skin cancer worldwide. Morphological and functional markers of malignancy are often combined to improve expert human diagnostic power. We propose the evaluation of the
Alireza Mowla, Thomas Taimre, Yah Leng Lim, Karl Bertling, Stephen J. Wilson, Tarl W. Prow, H. Peter Soyer, Aleksandar D. Rakić   +7 more
doaj   +1 more source

Surface roughness characterisation using optical feedback interferometry

, 2016
The characterisation of surface roughness is important in process control and metrology. A simple, low cost sensor which can be used for this measurement is one based on laser optical feedback interferometry.
Herbert, Jeremy, Taimre, Thomas, Rakic, Aleksandar, Bertling, Karl, Wilson, Stephen J.   +4 more
core   +1 more source

High-precision length measurement by means of multisensory laser-feedback interferometry

, 2022
S.507-514We present a novel velocity and length measuring instrument based on laser-feedback interferometry. Uncertainties down to 10-4 in length measurement of moving materials can be achieved by combining the measurement signals of two separate sensors.
Allgeier, T., Wagner, E., Höfler, H.
core   +1 more source

Application of Phase Shifted, Laser Feedback Interferometry to Fluid Physics

, 1996
We have combined the principles of phase-shifting interferometry (PSI) and laser-feedback interferometry (LFI) to produce a new instrument that can measure both optical path length (OPL) changes and discern sample reflectivity variations.
Andrews, James H., Khaydarov, John, Ovryn, Ben, Eppell, Steven J.   +3 more
core  

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

LASER FREQUENCY STABILIZATION FOR ATOM INTERFEROMETRY APPLICATIONS [PDF]

, 2021
Many atomic sensors depend on using a laser with a precisely defined frequency. Unfortunately, most lasers suffer from perturbations in their effective cavity length (which determines the operating frequency of the laser) and active stabilization is ...
Gilliam, George N.
core  

Development of FPGA controlled diagnostics on the MAST fusion reactor [PDF]

, 2013
Field Programmable Gate Array technology (FPGA) is very useful for implementing high performance digital signal processing algorithms, data acquisition and real-time control on nuclear fusion devices.
HUANG, BILLY,KIAT
core