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Dissertations / Theses on the topic 'Amplified spontaneous emission (ASE)'

Author: Grafiati

Published: 25 May 2024

Last updated: 25 July 2025

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1

Du, Weiwei. "Development of new organic emissive materials for organic light-emitting diodes and organic laser applications." Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS215.

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Dans ce travail, de nouveaux matériaux émetteurs organiques ont été développés pour des applications dans le domaine des diodes électroluminescentes ou des lasers organiques. Tout d’abord, trois séries de molécules « through space » TADF (Fluorescence retardée activée thermiquement) à base de cœurs cyclophane ont été préparées avec succès. Leurs structures chimiques ont été caractérisées par résonnance magnétique nucléaire (RMN) et spectroscopie de masse haute résolution (HRMS). Leurs propriétés photophysiques ont été étudiées en solution et à l’état solide. Dans ces structures, le transfert d

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2

Smith, Gerald Robert. "Solid-state adaptive lasers and amplified spontaneous emission sources." Thesis, Imperial College London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.497619.

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3

Talli, Giuseppe. "Amplified spontaneous emission and gain dynamics in semiconductor optical amplifiers." Thesis, University of Essex, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397730.

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4

Dudley, Christopher. "Absorption, fluorescence and amplified spontaneous emission of blue-emitting dyes." Online access for everyone, 2004. http://www.dissertations.wsu.edu/Thesis/summer2004/c%5Fdudley%5F052104.pdf.

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5

Foo, Sik Heng. "Statistical properties of filtered amplified spontaneous emission noise of erbium-doped fiber amplifiers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0019/MQ47029.pdf.

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6

Sundar, Vikram C. (Vikram Chandraseker) 1975. "Novel II-IV semiconductor nanocrystal gain media : from amplified spontaneous emission to lasing." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/8177.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2002.<br>Includes bibliographical references.<br>This thesis details efforts in using cadmium selenide (CdSe) nanocrystallites (NCs) as a novel lasing media. We begin with the synthesis of polymer/NC composites, in which the NCs are stabilized within a long-chain methacrylate polymer. This chapter serves to highlight the processing flexibility afforded by the NCs as well as some of the salient linear optical properties of NCs. The wide range of colors that are accessible using these NCs and the ability to excite them s

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7

Li, Haixia. "Design and characterization of new pyridazine materials for OLEDs and OSLs applications." Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS227.

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Dans ce travail, de nouveaux matériaux émetteurs organiques ont été développés pour des applications dans le domaine des diodes électroluminescentes ou des lasers organiques. Tout d’abord, plusieurs molécules de type Donneur-Accepteur incorporant des cœurs azotés électrodéficients variés ont été préparées avec succès, leur design étant conçu dans le but d’obtenir des émetteurs TADF. Leurs propriétés photo-physiques ont été étudiées en solution et à l’état solide. Dans ces structures, le transfert de charge intramoléculaire est produit via des interactions intermoléculaires entre les groupement

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8

De, Leon Arizpe Israel. "Amplification of Long-Range Surface Plasmon-Polaritons." Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19790.

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Surface plasmon-polaritons are optical surface waves formed through the interaction of photons with free electrons at the surface of metals. They offer interesting applications in a broad range of scientific fields such as physics, chemistry, biology, and material science. However, many of such applications face limitations imposed by the high propagation losses of these waves at visible and near-infrared wavelengths, which result mainly from power dissipation in the metal. In principle, the propagation losses of surface plasmon-polaritons can be compensated through optical amplification. Th

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9

Embaye, Natnael B. "Mechanism of self-healing of amplified spontaneous emission in the dye-doped polymer disperse orange 11 dye in PMMA polymer." Online access for everyone, 2007. http://www.dissertations.wsu.edu/Dissertations/Fall2007/N_Embaye_111907.pdf.

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10

Albach, Daniel. "Amplified Spontaneous Emission and Thermal Management on a High Average-Power Diode-Pumped Solid-State Laser – The Lucia Laser System." Palaiseau, Ecole polytechnique, 2010. http://tel.archives-ouvertes.fr/docs/00/50/49/15/PDF/these_final.pdf.

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On trouve sur la plateforme de thèses en ligne Pastel le résumé suivant : Le développement du laser a ouvert la voix à l'exploration de nouveaux domaines scientifiques et industriels. Les impulsions laser à haute intensité sont un outil unique pour les études d'interaction lumière/matière et leurs applications. Mais elles sont générées par des systèmes laser reposant sur l'utilisation de milieux à gain en verre pompés par des lampes flashes et sont donc intrinsèquement limitées en termes de cadence et d'efficacité. Le développement, au cours de ces dernières années, des lasers semi-conducteurs

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11

Zhang, Wanying. "Comprehensive Study on Fluorescent ESIPT Liquid Crystal Materials and the Potential for Optoelectronic Applications." Doctoral thesis, Kyoto University, 2021. http://hdl.handle.net/2433/263621.

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12

Yu, Zhou. "Optical Properties of Deoxyribonucleic Acid (DNA) and Its Application in Distributed Feedback (DFB) Laser Device Fabrication." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1154706431.

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13

Bolis, Serena. "Spatial optical solitons and optical gain in liquid crystal devices." Doctoral thesis, Universite Libre de Bruxelles, 2018. https://dipot.ulb.ac.be/dspace/bitstream/2013/268937/5/contratSB.pdf.

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In this work, we study the nonlinear propagation of light in liquid crystals (LCs) and the optical gain provided by LCs when they are polymer- or dye-doped.We will focus on nematic LCs, which are characterized by a mean orientation (also called director) of the elongated molecules and by a subsequent birefringence. After a general introduction on LCs, we focus on the nonlinear propagation of light in nematic LCs, and in particular the soliton-like propagation (nematicon). Indeed, if the light injected in the cell is intense enough, it can create a waveguide that counteracts the diffraction of

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14

Albach, Daniel. "Gestion de l'émission spontanée amplifiée et de la thermique d'un système laser solide de haute puissance moyenne pompée par diodes – le système laser Lucia." Phd thesis, Ecole Polytechnique X, 2010. http://tel.archives-ouvertes.fr/tel-00504915.

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Le développement du laser a ouvert la voix à l'exploration de nouveaux domaines scientifiques et industriels. Les impulsions laser à haute intensité sont un outil unique pour les études d'interaction lumière/matière et leurs applications. Mais elles sont générées par des systèmes laser reposant sur l'utilisation de milieux à gain en verre pompés par des lampes flashes et sont donc intrinsèquement limitées en termes de cadence et d'efficacité. Le développement, au cours de ces dernières années, des lasers semi-conducteurs a attiré l'attention sur une nouvelle classe de lasers, les « laser solid

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15

Koutný, Jan. "Organické pevnolátkové lasery." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-216970.

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The aim of this thesis is the preparation and characterization of model components for organic thin-film solid-state lasers. The theses focuses on comparing different methods of determining the threshold energy, which leads to an amplified spontaneous emission of the studied derivative diketo-pyrrolo-pyrrole. The theoretical part is devoted to a summary of knowledge on the interaction of light with matter and lasers with a focus on organic solid-state lasers. The practical part is focused on preparation of model components for organic solid-state lasers, modification of apparatus for their cha

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16

Ouzzane, Imad. "Pokročilé materiály pro organickou fotoniku." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2015. http://www.nusl.cz/ntk/nusl-233405.

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V oblasti nových nízkomolekulárních organických materiálů patří deriváty difenyldiketopyrrolopyrrolu (DPP), používané dříve jako barviva a pigmenty, k objektům vysokého zájmu pro jejich potencionální aplikace v moderních technologiích. Studium jejich optických vlastností ve vztahu k jejich chemické struktuře umožní využití jejich vysokého potenciálu ve vývoji pokročilých inteligentních materiálů. Přehled chemických a fyzikálních vlastností DPP derivátů a zhodnocení současného stavu řešené problematiky jsou uvedeny v teoretické části této práce. Tři hlavní procesy studované v této práci jsou: k

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17

Baudouin, Quentin. "Lumière dans des vapeurs atomiques opaques : piégeage radiatif, laser aléatoire et vols de Lévy." Phd thesis, Université Nice Sophia Antipolis, 2013. http://tel.archives-ouvertes.fr/tel-00952969.

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L'interaction matière-lumière dans des milieux opaques donne lieu à des phénomènes collectifs nécessitant le couplage d'équations atomiques et d'une équation de transport. Le piégeage de la lumière dans un système atomique multi-niveaux sera étudié expérimentalement dans une vapeur froide et théoriquement avec le couplage des paramètres atomiques à une équation de diffusion. Ensuite, du gain sera ajouté dans ce nuage d'atomes froids multi niveaux. Nous montrerons théoriquement qu'un seuil laser existe dans ce type de système combinant gain et diffusion et qu'expérimentalement le gain Raman ass

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18

Su, Che-Hsuan, and 蘇哲玄. "Study of Amplified Spontaneous Emission from DNA Biopolymers." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/52140199598429040951.

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碩士<br>國立清華大學<br>光電工程研究所<br>101<br>Deoxyribonucleic acid (DNA) has a unique helix structure and exhibits interesting material properties, which have found many applications in biochemistry and nanotechnology. Recently, DNA biopolymer has also been implemented in optoelectronics. As DNA is rich in nature and is an environmental-friendly material, research in DNA photonics has drawn much attention. Most research efforts have emphasized on manipulation of DNA host and dyes. However, the surfactant used to modify DNA also plays in important role in system performance. In this work, we use aromatic

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19

Lee, Chien-Mu, and 李建木. "Study of L-Band Amplified Spontaneous Emission Fiber Source." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/64679367858900641491.

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碩士<br>國立中山大學<br>光電工程研究所<br>89<br>In this thesis, we investigate the single-pumped L-band (1570-1610 nm) amplified spontaneous emission fiber source by employing 1480 nm single pumping configuration. Using the 1480 nm-pumped laser, we chose the adequate fiber length and adjusted the pump power to optimize the characteristics of the ASE source. The characteristics are experimentally examined and compared in terms of the output power, mean wavelength, spectral linewidth, and pumping conversion efficiency in four configurations with single-pass forward (SPF), single-pass backward (SPB), double-pas

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20

Maity, Shreyam. "True Random Number Generators based on Amplified Spontaneous Emission." Thesis, 2023. https://etd.iisc.ac.in/handle/2005/6124.

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Low-cost, high-speed quantum random number generators (QRNGs) are imperative to develop in order to have a widespread application in areas ranging from cryptography and stochastic simulations to banking and internet. Amplified spontaneous emission (ASE) based QRNGs offer a great advantage in this pursuit. However, most ASE-based QRNGs use costlier and more complex components compared to their speed. In this work, we discuss two QRNG schemes where we alleviate this problem. We also develop a comprehensive theoretical study to understand then in detail. In our ASE-ASE beating based QRNG, random

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21

Stefanovic, Nemanja. "Robust L2 nonlinear control of EDFA with amplified spontaneous emission." 2005. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=370249&T=F.

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22

Tsai, Tseng-Chien, and 蔡宗鑑. "Study of High Power L-band Amplified Spontaneous Emission Fiber Source." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/48680207376187384494.

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碩士<br>國立中山大學<br>光電工程研究所<br>90<br>In this thesis, we investigate the double-pumped L-band (1570-1610 nm) amplified spontaneous emission (ASE) fiber source by employing the 1480 nm bi-directional pumping configuration. First, we chose the adequate fiber length, and then adjusted the pump power to optimize the characteristics of the ASE source in different reflectance. The characteristics are experimentally examined and compared in terms of output power, mean wavelength, linewidth, flatness and conversion efficiency in three configurations with forward-forward (FF), forward-backward (FB) and back

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23

Morão, Diogo Miguel Cigarro. "Impact of physical layer impairments on large ROADM architectures." Master's thesis, 2020. http://hdl.handle.net/10071/20973.

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Most of today’s optical networks, use reconfigurable optical add/drop multiplexers (ROADMs) as nodes. To become more dynamic and flexible, these nodes architectures evolved over the years. The colorless, directionless and contentionless functionalities are now standard, however, current architectures have poor scalability due to limitations on wavelength selective switches dimensions. Hence, due to constant increase in data traffic, current architectures might become a bottleneck to manufacture future large-scale ROADMs. In this work, the hardware cost and in-band crosstalk generation in

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24

Priante, Davide. "The Recombination Mechanism and True Green Amplified Spontaneous Emission in CH3NH3PbBr3 Perovskite." Thesis, 2015. http://hdl.handle.net/10754/576012.

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True-green wavelength emitters at 555 nm are currently dominated by III-V semiconductor-based inorganic materials. Nevertheless, due to high lattice- and thermal-mismatch, the overall power efficiency in this range tends to decline for high current density showing the so-called efficiency droop in the green region (“green gap”). In order to fill the research green gap, this thesis examines the low cost solution-processability of organometal halide perovskites, which presents a unique opportunity for light-emitting devices in the green-yellow region owing to their superior photophysic propertie

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25

Lai, Fu-Shun, and 賴富順. "Analyses of Amplified Spontaneous Emission Noise and Distortions in Erbium-Doped Fiber Amplifiers." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/44487095039253221439.

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博士<br>國立臺灣科技大學<br>電子工程系<br>87<br>This thesis presents simple methods to extract system parameters and to analyze the erbium-doped fiber amplifier (EDFA) for the applications of fibers to communications and sensor systems. First, a simple method to determine, in a quantitative way, the degree of the influence of ASE is presented. Through the study of the effect of ASE on EDFA gains, it is and found that the ASE can be neglected when the nearly-no-ASE factor (NNAF) is large enough. It is proposed as an ASE indicator. Furthermore, a formula for computing the error of output power due to the negle

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26

Jih, Wen Jyh, and 紀文智. "The Effective Model of Amplified Spontaneous Emission Noise in Erbium-Doped Fiber Amplifier." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/93912791032088490121.

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27

Wang, Yu-Ta, and 王譽達. "Study of Applying Ultra-Broadband Amplified Spontaneous Emission of Cr:YAG to Optical Low Coherence Reflectometry." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/99313492564932483373.

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碩士<br>國立臺灣大學<br>光電工程學研究所<br>95<br>Based on white-light interferometry, optical low coherence reflectometry (OLCR) has emerged as a promising technique for obtaining high-axial-resolution measurements for fiber optic, integrated optic, and thin film structures. Recent OLCR modules incorporating superluminescent diodes have achieved high resolution of 10-15 um. However, for applications to biological and medical diagnostics, higher imaging resolution is required. We have successfully developed a novel broadband light source, on the basis of a double-clad Cr+4:YAG crystal fiber, generating broadb

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28

Wang, Yu-Ta. "Study of Applying Ultra-Broadband Amplified Spontaneous Emission of Cr:YAG to Optical Low Coherence Reflectometry." 2007. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0001-1907200718560500.

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29

Chen, Jiunndar, and 陳俊達. "Effect of Cumulative Amplified-Spontaneous-Emission Noise on Pulse Propagation in a Dispersive Single-Mode Optical Fiber." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/54410773519310636309.

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碩士<br>國立清華大學<br>電機工程研究所<br>81<br>The effect of accumulated optical-amplifier-induced noise on the pulse propagation in a dispersive single-mode optical fiber is theoretically investigated . Due to such effect , the pulse is weakened at the central part and quite long dispersive tails are produced , resulting in significant loss of signal power in a time slot of a bit . This situation becomes more severe as the bandwidth of the noise spectrum increases . Also , the performance degradation of

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30

Martins, Genádio João Faria. "Monte Carlo simulation of an optical differential phase-shift keying communication system with direct detection impaired by in-band crosstalk." Master's thesis, 2012. http://hdl.handle.net/10071/8265.

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O renovado interesse nas comunicações ópticas com modulação de fase diferencial DPSK (differential phase-shift keying) provém do facto de esta superar o formato convencional de modulação de intensidade, OOK (on-off keying) em certos aspectos, tais como, sensibilidade do receptor, robustez às limitações da transmissão e tolerância às flutuações da potência do sinal. O crescimento exponencial do tráfego de dados e as vantagens do DPSK levam à necessidade da sua utilização no contexto das redes ópticas, sendo uma das principais limitações físicas das redes ópticas, o crosstalk. O crosstalk homód

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31

Silva, Marco Quiteres da. "Impact of physical layer impairments on SDM networks based on ROADM nodes." Master's thesis, 2021. http://hdl.handle.net/10071/24322.

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Current transport optical networks are approaching its capacity limits, mainly due to new applications and services that require a huge amount of resources. To increase the network capacity, multiband solutions, that exploit the unused capacity of actual fibers, in particular the L-band, are being currently commercially explored. However, this strategy is assumed as a short to medium term solution. A long-term solution is to use spatial-division multiplexing (SDM) in the optical domain, which leads to the concept of SDM-based optical networks. In this work, different SDM switching architectur

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