Academic literature on the topic 'Spontaneous Parametric Down Conversion'

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Dissertations / Theses on the topic "Spontaneous Parametric Down Conversion"

1

Ahlrichs, Andreas. "Triply-Resonant Cavity-Enhanced Spontaneous Parametric Down-Conversion." Doctoral thesis, Humboldt-Universität zu Berlin, 2019. http://dx.doi.org/10.18452/20150.

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Die verlässliche Erzeugung einzelner Photonen mit wohldefinierten Eigenschaften in allen Freiheitsgraden ist entscheidend für die Entwicklung photonischer Quantentechnologien. Derzeit basieren die wichtigsten Einzelphotonenquellen auf dem Prozess der spontanen parameterischen Fluoreszenz (SPF), bei dem ein Pumpphoton in einem nichtlinearen Medium spontan in ein Paar aus Signal und Idlerphotonen zerfällt. Resonator-überhöhte SPF, also das Plazieren des nichtlinearen Mediums in einem optischen Resonator, ist ein weit verbreitetes Verfahren, um Einzelphotonenquellen mit erhöhter Helligkeit und an
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Galinis, Justinas. "Research on spontaneous parametric down-conversion pumped by incoherent light sources." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140925_134845-59928.

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Spontaneous parametric down conversion (SPDC) – incoherent light scattering – is one of the main entangled photons source applied in quantum optics experiments. The tradition to pump SPDC by laser radiation was established from the very first SPDC experiments in 1968. The aim of this thesis was experimentally to investigate the ability to generate an SPDC pumping by both temporal and spatially incoherent radiation - a high-power blue LED. Weak SPDC signals were registered with high sensitivity CCD cameras, photons coincidences were detected with photon counters. The theoretical simulations wer
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Zielińska, Joanna Ada. "Spontaneous parametric down-conversion sources for generation of atom-resonant quantum light." Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/481985.

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This thesis studies different designs of optical parametric oscillators as sources of atom-resonant quantum light resonant with the rubidium D1 line.We analyze the mode structure and filtering techniques in a conventional OPO based on a crystal inside a ring cavity. We also present a first fully-tunable design of a monolithic doubly-resonant OPO. The first part presents the study of a multimode optical parametric oscillator from the theoretical point of view, calculating a multimode Bogoliubov transformation and a time-domain intensity correlation function. Next, we experimentally observe sig
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4

Sevilla, Carlos Andres. "Direct Observation of Conservation of Orbital Angular Momentum in Collinear Type-I Spontaneous Parametric Down-Conversion." University of Dayton / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1543326773239719.

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Ahlrichs, Andreas [Verfasser], Oliver [Gutachter] Benson, Jürgen [Gutachter] Eschner, and Günter [Gutachter] Steinmeyer. "Triply-Resonant Cavity-Enhanced Spontaneous Parametric Down-Conversion / Andreas Ahlrichs ; Gutachter: Oliver Benson, Jürgen Eschner, Günter Steinmeyer." Berlin : Humboldt-Universität zu Berlin, 2019. http://d-nb.info/1191175340/34.

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6

Galinis, Justinas. "Parametrinės fluorescencijos žadinamos nekoherentiniais šviesos šaltiniais tyrimas." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140925_134905-11051.

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Parametrinė fluorescencija (PF) – nekoherentinė šviesos sklaida – yra vienas pagrindinių susietųjų fotonų šaltinių taikomų kvantinės optikos eksperimentuose. Nuo pat pirmųjų PF eksperimentinių tyrimų 1968 metais įsigalėjo tradicija šį reiškinį žadinti išimtinai lazerine spinduliuote. Šios disertacijos tikslas – eksperimentiškai ištirti galimybę generuoti PF tiek laikiškai, tiek ir erdviškai nekoherentine spinduliuote – didelės galios šviesos diodu. Atliekant tyrimus didelio jautrio CCD kamera buvo registruojami silpni PF signalai, pavienių fotonų skaitliukais buvo registruojami fotonų sutapima
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7

Maltese, Giorgio. "Generation and manipulation of high-dimensional photonics states with AlGaAs chips." Thesis, Sorbonne Paris Cité, 2019. https://theses.md.univ-paris-diderot.fr/MALTESE_Giorgio_2_complete_20190915.pdf.

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Cette thèse est consacrée au développement de nouveaux dispositifs semi-conducteurs intégrés et de méthodes pour la génération et la manipulation d'états lumineux de haute dimension. Nous présentons l'étude d'un guide d'onde AlGaAs utilisant un processus de conversion paramétrique spontanée de type II en régime de pompage monochromatique, s’intéressant en particulier à l'amplitude spectrale jointe de l'état émis. La source fonctionne à température ambiante, émet des paires de photons dans le domaine des télécommunications et est compatible avec l'injection électrique. La génération d'états bip
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8

Lamas, Linares Antía. "Stimulated parametric down-conversion and quantum cloning." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270641.

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9

Ravaro, Marco. "Nonlinear GaAs/AIOx waveguides for parametric down-conversion." Paris 7, 2008. http://www.theses.fr/2008PA077049.

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Ce travail concerne des guides d'ondes semiconducteurs pour la génération et l'oscillation paramétrique. Dans de tels guides, la conversion de fréquence est accordée en phase grâce à un noyau multicouches biréfringent GaAs/AIOx. Cette technique a déjà permis la réalisation de plusieurs interactions optiques non linéaires et, à présent, l'objectif est la réalisation d'un oscillateur paramétrique intégré semiconducteur. Notre travail dans cette direction a porté principalement sur deux points. Le premier point est l'optimisation du processus de fabrication. Le principal inconvénient des guides d
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10

Walborn, Stephen Patrick. "The Brothers Q: multimode entangled photons with parametric down conversion." Universidade Federal de Minas Gerais, 2004. http://hdl.handle.net/1843/ESCZ-693PMS.

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This thesis is a study of the quantum properties of multimode entangled photons created by spontaneous parametric down-conversion. More specifically, we attempt to utilize this multimode character in quantum information tasks such as Bell-state measurement and the generation of photons entangled in transverse spatial degrees of freedom. As a first investigation, a theoretical study of multimode Hong-Ou-Mandel interference was conducted. It is shown that the fourth-order interference effects depend upon the transverse spatial properties of the biphoton. Due to the transfer of the angular spectr
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