Results 21 to 30 of about 1,993 (216)
SELF-MIXING LASER VIBROMETER WITH RESOLUTION IN THE MICRO AND NANO METERS SCALE
Anales (Asociación Física Argentina), 2021 We present the development of an interferometer capable of making contactless measurements of vibrations. The results show the we achieve micro- and/or nano-metric measurements without the stabilization of the laser.
L. E. Filgueira, C. T. Schmiegelow
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Self-aligned setup for laser optical feedback imaging insensitive to parasitic optical feedback [PDF]
Applied Optics, 2008 In this paper we propose a new optical architecture for the laser optical feedback imaging (LOFI) technique which makes it possible to avoid the adverse effect of the optical parasitic backscattering introduced by all the optical interfaces located between the laser source and the studied object.
Jacquin, Olivier +3 more
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IEEE Photonics Journal, 2018 An InP-based, monolithically integrated multiwavelength laser with optical feedback is presented. We demonstrate the performance of the dual-wavelength operation. Single-mode lasing is obtained for each of the two channels within a temperature range from
Dan Zhao +5 more
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Optical Feedback Sensitivity of a Semiconductor Ring Laser with Tunable Directionality
Photonics, 2019 We discuss the sensitivity to optical feedback of a semiconductor ring laser that is made to emit in a single-longitudinal mode by applying on-chip filtered optical feedback in one of the directional modes. The device is fabricated on a generic photonics
Guy Verschaffelt +2 more
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Adaptive Optics Feedback Control [PDF]
EAS Publications Series, 2013 This book is a collection of 19 articles which reflect the courses given at the Collège de France/Summer school “Reconstruction d'images − Applications astrophysiques“ held in Nice and Fréjus, France, from June 18 to 22, 2012. The articles presented in this volume address emerging concepts and methods that are useful in the complex process of improving
Folcher, J.-P. +3 more
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Hysteresis Loop Effect on Intensity for Horizontal and Vertical Polarization by Optical Feedback [PDF]
مجلة جامعة الانبار للعلوم الصرفة, 2020 The effect of optical feedback on hysteresis loop (HL) is investigated. Hysteresis loop occurs between two eigenstates of the He-Ne laser (x , y) and it changes by optical feedback at angles from 0° to 180°.
Ehsan Ali Abed +2 more
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VCSEL with multi-transverse cavities with bandwidth beyond 100 GHz
Nanophotonics, 2021 To fulfill the demands of high-speed photonic applications, researchers, and engineers have been working to improve the modulation bandwidth (MBW) of semiconductor lasers.
Heidari Elham +5 more
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Semiconductor laser with filtered optical feedback: from optical injection to conventional feedback
IMA Journal of Applied Mathematics, 2007 AbstractWe study a model for a semiconductor laser subject to filtered optical feedback,that is a system of delay differential equations (DDEs). In this model the filter is characterisedby a mean frequency Ωm and a filter width λ. In the limit of a narrow filter(λ → 0) the laser equations reduce to the equations for a laser with optical injection ...
Hek, G., Rottschäfer, V.
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Photonics, 2023 Spin-polarized vertical-cavity surface-emitting lasers (spin-VCSELs) with birefringence-induced polarization oscillations have been proposed to generate desired photonic microwave signals.
Zhenye Shen +5 more
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OPTICAL TRANSISTORS WITH NEGATIVE FEEDBACK
Le Journal de Physique Colloques, 1988 We consider a Fabry-Perot filled with a nonlinear medium. The transmitted (It) and reflected (Ir) intensities are related to the holding or input beam intensity Ih by the Airy formulae: It is assumed that the angle of incidence is sufficiently small (i.e., near normal incidence) to neglect the angular dependence in the Airy function.
Mandel, P., Smith, S.
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