Journal ArticleDOI
Motion-free hybrid design laser beam propagation analyzer using a digital micromirror device and a variable focus liquid lens
Mumtaz Sheikh,Nabeel A. Riza +1 more
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TLDR
The first motion-free laser beam propagation analyzer with a hybrid design using a digital micromirror device (DMD) and a liquid electronically controlled variable focus lens (ECVFL) is proposed, promising better repeatability, speed, and reliability.Abstract:
To the best of our knowledge, we propose the first motion-free laser beam propagation analyzer with a hybrid design using a digital micromirror device (DMD) and a liquid electronically controlled variable focus lens (ECVFL). Unlike prior analyzers that require profiling the beam at multiple locations along the light propagation axis, the proposed analyzer profiles the beam at the same plane for multiple values of the ECVFL focal length, thus eliminating beam profiler assembly motion. In addition to measuring standard Gaussian beam parameters, the analyzer can also be used to measure the M2 beam propagation parameter of a multimode beam. Proof-of-concept beam parameter measurements with the proposed analyzer are successfully conducted for a 633 nm laser beam. Given the all-digital nature of the DMD-based profiling and all-analog motion-free nature of the ECVFL beam focus control, the proposed analyzer versus prior art promises better repeatability, speed, and reliability.read more
Citations
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Journal ArticleDOI
Digital Micro-mirror Device-based broadband optical image sensor for robust imaging applications
TL;DR: In this paper, a robust broadband optical image sensor using a Digital Micro-mirror Device (DMD) is presented for the first time, which provides robustness to global light irradiance variations such as via environmental effects, e.g., moving clouds.
Journal ArticleDOI
Measurement of the M 2 beam propagation factor using a focus-tunable liquid lens
TL;DR: The variable-focus technique is extended to the characterization of general astigmatic beams by measuring the 10 second-order moments of the power density distribution for the twisted beam produced by passage through multimode optical fiber.
Journal ArticleDOI
Improved laser-based triangulation sensor with enhanced range and resolution through adaptive optics-based active beam control.
TL;DR: This paper proposes a novel design of a triangulation-based optical rangefinder that improves both the sensor resolution and its dynamic range through adaptive electronic control of beam propagation parameters through the use of tunable focus lenses (TFLs).
Journal ArticleDOI
Free-Motion Beam Propagation Factor Measurement by Means of a Liquid Crystal Spatial Light Modulator
J. Perez-Vizcaino,Omel Mendoza-Yero,Raúl Martínez-Cuenca,Lluís Martínez-León,Enrique Tajahuerce,Jesús Lancis +5 more
TL;DR: A novel experimental implementation where a low-cost programmable liquid crystal spatial light modulator (SLM) is used for sequentially codifying a set of lenses with different focal lengths for measurement of the laser beam propagation factor (M2) without moving components is demonstrated.
Journal ArticleDOI
Nonbulk motion system for simultaneously measuring the refractive index and thickness of a sample using tunable optics and spatial signal processing-based Gaussian beam imaging.
Syed Azer Reza,Muhammad Qasim +1 more
TL;DR: A novel approach to simultaneously measuring the thickness and refractive index of a sample by using an electronically controlled tunable lens and a digital micromirror device to characterize the spatial profile of a Gaussian laser beam at different focal length settings.
References
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Laser beams and resonators
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TL;DR: This paper is a review of the theory of laser beams and resonators and emphasis is placed on formulations and derivations which lead to basic understanding and on results which bear practical significance.
Proceedings ArticleDOI
How to (Maybe) Measure Laser Beam Quality
TL;DR: This tutorial is intended to convey that measuring, or even rigorously defining, any single all-inclusive measure of laser beam quality is still a controversial an unsettled topic—and may remain so for some time.
Journal ArticleDOI
Output beam propagation and beam quality from a multimode stable-cavity laser
Anthony E. Siegman,S.W. Townsend +1 more
TL;DR: In this article, the authors present experimental data for a high-power CO/sub 2/ laser which confirm the validity of a simple analysis for the beam divergence and beam quality of the output beam from a large-bore multimode stable-cavity laser oscillator.