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Dissertations / Theses on the topic 'Vertical cavity 24 surface emitting laser (VCSEL)'

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1

Tastavridis, Konstantinos. "Dynamics of vertical cavity surface emitting laser arrays." Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268777.

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2

Ostermann, Johannes Michael. "Diffractive optics for polarization control of vertical-cavity surface-emitting lasers." [S.l. : s.n.], 2007. http://nbn-resolving.de/urn:nbn:de:bsz:289-vts-60098.

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3

Bäcker, Alexandra. "A TCAD analysis of long-wavelength vertical-cavity surface-emitting lasers." Konstanz Hartung-Gorre, 2009. http://d-nb.info/995591296/04.

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4

May, Johanna Friederike. "Vertical Cavity Surface Emitting Laser diodes as laser sources in optical tweezers." [S.l. : s.n.], 2007. http://nbn-resolving.de/urn:nbn:de:bsz:289-vts-60195.

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5

Kreuter, Philipp. "Modeling of electrically pumped vertical-external-cavity surface-emitting lasers." Konstanz Hartung-Gorre, 2009. http://d-nb.info/1002628989/04.

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6

Lee, Kyung-Woo. "Fiber Fabry-Perot interferometer (FFPI) sensor using vertical cavity surface emitting laser (VCSEL)." Diss., Texas A&M University, 2005. http://hdl.handle.net/1969.1/4221.

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This research represents the first effort to apply vertical cavity surface emitting lasers (VCSELs) to the monitoring of interferometric fiber optic sensors. Modulation of the drive current causes thermal tuning of the laser light frequency. Reflection of this frequency-modulated light from a fiber Fabry-Perot interferometer (FFPI) sensor produces fringe patterns which can be used to measure the optical path difference of the sensor. Spectral characteristics were measured for 850nm VCSELs to determine the combination of dc bias current, modulation current amplitude and modulation frequency for
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7

Sondermann, Markus. "On polarization dynamics in vertical cavity surface emitting lasers solitary devices and lasers with isotropic optical feedback /." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971884374.

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8

Wu, Xiaoyue. "Simulation Study of Epitaxially Regrown Vertical-Cavity Surface-Emitting Lasers." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-52896.

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The vertical-cavity surface-emitting laser or VCSEL is a special type of diode laser, which has established itself in optoelectronic applications asa low-cost, high-quality miniaturized light source. The development of VCSELs can be largely promoted with support from computer simulations. In this study, we have used such simulations, on one hand to understand and improve the VCSEL performance, and on the other hand to prepare for analyzing new device concepts such as transistor-VCSELs. This thesis starts with a background introduction to the principle idea of VCSELs and then states the signifi
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9

Baschieri, Lorenzo. "Feasible predistortion loop for the linearization of Radio-over-Fiber system based on 850 nm Vertical Cavity Surface Emitting Laser and standard G.652 fiber." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22266/.

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The main purpose of the work is to investigate a low-cost solution for systems designed for the distribution of the RF signal employing the Radio Over Fiber (RoF) technology, including the additional feature of a possible digital predistortion of the modulating signal to compensate the detrimental effects of the system nonlinearities. A Vertical Cavity Surface Emitting Laser (VCSEL) operating at 850 nm and the standard single mode fiber G-652 have been used with this purpose, since their combination is one of the cheapest possible solutions that can be implemented. The main problem present
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10

Verbrugge, Vivien. "Étude de dispositifs optiques à micro-cavité verticale pour l'utilisation dans un module multi-longueur d'onde." Rennes, INSA, 2003. http://www.theses.fr/2003ISAR0001.

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11

Araujo, Viana Carlos. "Développement technologique et intégration système de VCSEL et HPT SiGe pour des applications radio-sur-fibre 60 GHz bas coût." Thesis, Paris Est, 2014. http://www.theses.fr/2014PEST1003/document.

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Cette thèse s'inscrit dans le cadre du projet français FUI8-ORIGIN qui vise à développer les performances des réseaux domestiques en apportant des solutions sans multi-Gigabits faiblement radiatives, économes et pérennes. La solution ORIGIN est caractérisée par l'action complémentaire de deux technologies: les communications sans fil 60 GHz, avec notamment la création récente en Janvier 2013 de la nouvelle norme WiFi 60GHz, et la mise en place d'une infrastructure Radio-sur-Fibre (RoF) afin d'étendre la propagation de ses signaux radio fortement atténués par l'atmosphère et les murs, au sein d
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12

Dika, Ihab. "Photopolymère pour le proche infrarouge : application à la fabrication de microlentilles sur composants optiques par écriture directe." Thesis, Mulhouse, 2015. http://www.theses.fr/2015MULH5392.

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L’objectif de cette thèse est de développer un nouveau matériau photopolymère pouvant être microstructuré dans la gamme de longueur d'onde du proche infrarouge (NIR). Le but final de ce travail est de proposer des solutions innovantes pour l'intégration de micro-optique sur les VCSELs (Vertical-Cavity Surface-Emitting Laser), sources lumineuses miniaturisées utilisées dans de nombreuses applications en optique, photonique, capteurs ou biologie. Le verrou technologique principal a consisté à développer et étudier le photopolymère adéquat pour la microfabrication déclenchée par le VCSEL. La diff
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13

Vatin, Jeremy. "Photonique neuro-inspirée pour des applications télécoms." Electronic Thesis or Diss., CentraleSupélec, 2020. http://www.theses.fr/2020CSUP0004.

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Nous produisons chaque jour de grandes quantités de données, que nous échangeons sur le réseau Internet. Ces données sont traitées grâce à des clusters de calcul, responsables de la consommation énergétique d’internet. Dans cette thèse, nous étudions une architecture faite de composants photoniques, pour se débarrasser des composants électroniques consommant de l'énergie. Grâce aux composants actuellement utilisés dans le réseau Internet (laser et fibre optique), nous réalisons un réseau neuronal artificiel capable de traiter les données de télécommunication. Le réseau de neurones artificiel e
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14

Chevallier, Christ-Yves. "Conception de miroirs à réseau sub-longueur d'onde pour application VCSEL dans le moyen infrarouge." Phd thesis, Supélec, 2013. http://tel.archives-ouvertes.fr/tel-01024257.

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Les lasers à cavité verticale émettant par la surface (VCSEL) à base d'antimoniures dans le moyen infrarouge permettent le développement et l'amélioration d'applications telles que la détection de gaz polluants. De nouveaux miroirs à réseaux à haut contraste d'indice (HCG) ont montré un pouvoir réflecteur comparable voire supérieur aux miroirs de Bragg conventionnels avec un gain d'épaisseur d'un facteur 10 tout en offrant un effet polarisant. L'insertion de ce nouveau type de miroir au sein d'une structure VCSEL présente ainsi des avantages prometteurs pour améliorer les propriétés de ces com
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15

Reardon, Christopher P. "Free space optical interconnects for speckled computing." Thesis, St Andrews, 2009. http://hdl.handle.net/10023/698.

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16

Sciancalepore, Corrado. "Intégration hétérogène III-V sur silicium de microlasers à émission par la surface à base de cristaux photoniques." Phd thesis, Ecole Centrale de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00915280.

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La croissance continue et rapide du trafic de données dans les infrastructures de télécommunications, impose des niveaux de débit de transmission ainsi que de puissance de traitement de l'information, que les capacités intrinsèques des systèmes et microcircuits électroniques ne seront plus en mesure d'assurer à brève échéance : le développement de nouveaux scenarii technologiques s'avère indispensable pour répondre à la demande de bande passante imposée notamment par la révolution de l'internet, tout en préservant une consommation énergétique raisonnable. Dans ce contexte, l'intégration hétéro
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17

Couturier, Laurent. "Conception et contrôle in-situ de l'élaboration de lasers à cavité verticale et à émission surfacique." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0194.

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Ce memoire est consacre a la conception et la mise au point du controle in-situ de la croissance de lasers a cavite verticale et a emission surfacique (vcsel). Les structures laser sont elaborees par epitaxie par jets moleculaires a source gazeuse et realisees par l'empilement de couches minces a base de semi-conducteurs gaas/algaas. Leur longueur d'onde d'emission va dependre directement des caracteristiques optiques des couches deposees. Une etude theorique est d'abord menee sur la conception de ces structures. Nous commencons par determiner les constantes optiques des materiaux qui les comp
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18

Beltrán, Ramírez Marta. "Photonic Techniques for Next-Generation Integrated Optical Networks Based on Ultra-Wideband Radio / Técnicas Fotónicas para Redes Ópticas Integradas de Próxima Generación Basadas en Radio de Banda Ultra Ancha." Doctoral thesis, Universitat Politècnica de València, 2012. http://hdl.handle.net/10251/15576.

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La presenta Tesis Doctoral encuentra su ámbito de aplicación en redes de acceso ópticas de fibra hasta el hogar o FTTH (del inglés fibre-to-the-home). Las redes FTTH han sido ampliamente desplegadas en todo el mundo y se prevé que evolucionen hasta arquitecturas de multiplexación por división en longitud de onda o WDM(dle inglés wavelength division multiplexing). Conforme los requerimientos de capacidady ancho de banda por usuario para servicios de comunicación de banda ancha se incrementan continuamente, tecnologías tales como hybrid wireless-optical, radio de banda ultra ancha o UWB(del ing
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19

Zhou, Delai. "Antiguided vertical-cavity surface-emitting laser (vcsel) structures /." 2002. http://www.library.wisc.edu/databases/connect/dissertations.html.

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20

Yang, Ren-Xiang, and 楊仁翔. "The characteristics Analysis of 850nm Vertical Cavity Surface Emitting Laser(VCSEL)." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/71135245410662061824.

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碩士<br>健行科技大學<br>電子工程系碩士班<br>102<br>Since the surface-emitting laser with a small, very fine and difficult to divergent laser beam , the beam is circular, low starting current , high output efficiency, easy and fiber optic connectors , a single laser output wavelength resonant cavity is very short and other advantages, it shows a wide range of applications , such as night lighting auxiliary light source , laser mouse , laser ranging, suspension and other touch sensing elements , so there are many domestic research team worked very hard this door surface emitting laser field . This study is the
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21

Vujanic, Dragan. "Tunable diode laser trace gas detection with a vertical cavity surface emitting laser." Master's thesis, 2009. http://hdl.handle.net/10048/648.

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Thesis (M. Sc.)--University of Alberta, 2009.<br>Title from PDF file main screen (viewed on Oct. 19, 2009). A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Master of Science, Department of Electrical and Computer Engineering, University of Alberta. Includes bibliographical references.
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22

Wagstaff, Jonathan M. "Characterization of a Red Multimode Vertical-Cavity Surface-Emitting Laser for Intrinsic Parameters." Thesis, 2007. http://hdl.handle.net/10754/669964.

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Compared to single-mode VCSELs, multimode VCSELs have not received much attention in models and characterizations for functional parameters, despite making up the majority of commercially available VCSELs [1]. In particular, the extraction of the linewidth enhancement factor for multimode VCSELs has been overlooked, likely due to difficulties in measurement. Additionally, multimode models for VCSELs have, until recently, omitted spectral characteristics such as linewidth [2]. This is the first work to report a measured linewidth enhancement factor value (lower bound) for a multimode VCSEL. A
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23

Wagstaff, Jonathan. "Characterization of a Red Multimode Vertical-Cavity Surface-Emitting Laser for Intrinsic Parameters." Thesis, 2021. http://hdl.handle.net/10754/669964.

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Compared to single-mode VCSELs, multimode VCSELs have not received much attention in models and characterizations for functional parameters, despite making up the majority of commercially available VCSELs [1]. In particular, the extraction of the linewidth enhancement factor for multimode VCSELs has been overlooked, likely due to difficulties in measurement. Additionally, multimode models for VCSELs have, until recently, omitted spectral characteristics such as linewidth [2]. This is the first work to report a measured linewidth enhancement factor value (lower bound) for a multimode VCSEL. A
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24

Dzikowski, Matthew. "Spectroscopy of methane using a vertical cavity surface-emitting laser system with emphasis on development for portable applications." Master's thesis, 2009. http://hdl.handle.net/10048/714.

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Thesis (M. Sc.)--University of Alberta, 2009.<br>Title from PDF file main screen (viewed on Dec. 14, 2009). "A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Master of Science in Photonics and Plasmas, Department of Electrical and Computer Engineering, University of Alberta." Includes bibliographical references.
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25

Ringuette, Dene. "Application of Vertical-cavity Surface-emitting Lasers for Simultaneous Laser Speckle Contrast and Intrinsic Optical Signal Imaging: Toward Chronic Portable Cortical Hemodynamic Imaging." Thesis, 2012. http://hdl.handle.net/1807/32620.

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We demonstrated simultaneous intrinsic optical signal imaging (IOSI) and laser speckle contrast imaging (LSCI) using coherence modulation of vertical-cavity surface-emitting laser (VCSEL) diodes. The unique properties of VCSELs were exploited to deliver rapidly switched coherent and non-coherent illumination suitable for high resolution LSCI and IOSI, respectively. Utilizing three near-infrared VCSELs we were able to map changes in cortical blood oxygenation and flow during ischemia. Additionally, the subtle reflectance changes associated with cortical spreading depression were imaged using
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26

Stegenburgs, Edgars. "Generation of Orbital Angular Momentum (OAM) Modes with a Spiral Phase Plate Integrated Laser Source." Diss., 2021. http://hdl.handle.net/10754/668819.

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The objective of this work is to develop a near-infrared laser device capable of emitting orbital angular momentum (OAM) light. The prototyped device must be suitable for compact, energy-saving optical communication applications. Integrated OAM lasers will revolutionize high-capacity data transmission over any telecommuni- cation network environment, as OAM light can be guided and transmitted through kilometers of optical fibers and propagated in free space and underwater. Several methods for generating OAM light employing various complex monolithic and hybrid integration methods have been de
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27

Chiou, Shu-Woei, and 邱舒偉. "Investigations of the AlGaAs and Al-free Vertical Cavity Surface emitting Laser by Metalorganic Vapor Phase Epitaxy and the fabrication of single transverse mode VCSEL." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/24465820153350490695.

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博士<br>國立交通大學<br>電子工程系<br>89<br>In this dissertation, we have successfully fabricated AlGaAs and Al-free Vertical Cavity Surface Emitting Lasers (VCSELs) by MOVPE system. Firstly, we discuss the design rule for the VCSEL, the main effort is put on how to achieve high reflectivity and low resistance distributed Bragg reflectors. (DBRs) Secondary, we have do many experiment to achieve the good quality of the active region of the VCSELs, and find the best condition to growth InGaAs quantum wells. We also succeed in epi high quality AlGaAs VCSEL epi wafer, and investigate the quick
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