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Relevant bibliographies by topics / Self Phase Modulation (SPM) / Dissertations / Theses

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Dissertations / Theses on the topic 'Self Phase Modulation (SPM)'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Rios, Clauson Sales do Nascimento. "ImplementaÃÃo de portas lÃgicas atravÃs da modulaÃÃo de pulsos por posiÃÃo (PPM) em filtros acÃstico-Ãpticos sintonizÃveis." Universidade Federal do CearÃ, 2006. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=2097.

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FundaÃÃo de Amparo Ã Pesquisa do Estado do CearÃ<br>Nesta dissertaÃÃo foi estudada a aplicaÃÃo do filtro AcÃstico-Ãptico SintonizÃvel (AOTF), com a ModulaÃÃo de Pulsos por PosiÃÃo (PPM), objetivando implementar, utilizando o mÃtodo de Runge-Kutta de 4a ordem, portas lÃgicas (OR-OU e AND-E) Ãpticas operando com pulsos de luz ultracurtos (2ps). Neste trabalho Ã investigado o desempenho das portas considerando vÃrios comprimentos do filtro ( L) que integra a sua estrutura interna, com o intuito de obter o comprimento de filtro mais adequado para uma operaÃÃo satisfatÃria, em regime disper

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2

Falkenburg, Grant (Grant E. ). "High-order compensation of self-phase modulation in laser communication systems." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/112845.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2017.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (page 72).<br>Self-phase modulation (SPM) creates a power and fiber-length dependent spectral broadening that reduces signal-to-noise ratio in free-space laser communication systems which use a fiber to connect their transmitter's

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3

Slagle, Jonathan E. "Degenerate Frequency Two Beam Coupling in Organic Media Via Phase Modulation." University of Dayton / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1417798867.

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Zhou, Renjie. "DEVELOPMENT OF HIGH POWER FIBER LASER TECHNOLOGIES." University of Dayton / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1271970621.

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5

Carns, Jennifer. "Semiconductor Optical Amplifier as a Phase Modulator for Short-Pulse Synthetic Aperture Ladar and Vibrometry." University of Dayton / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1335278035.

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6

Lee, Kwan-Seop. "Studies on the decay and recovery of higher-order solitons, initiated by localized channel perturbations." Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-04122004-143924/unrestricted/Lee%5FKwanseop%5F200405%5FPhD.pdf.

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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2004.<br>John A. Buck, Committee Chair ; Stephen E. Ralph, Committee Member ; Gee-Kung Chang, Committee Member ; Rick Trebino, Committee Member ; Glenn S. Smith, Committee Member. Includes bibliographical references (leaves 102-104).

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7

Shahin, Shiva. "Engineering the performance of optical devices using plasmonics and nonlinear organic chromophores." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/333214.

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In this work, two optical devices, organic photovoltaics (OPVs) and optical fibers, are introduced. Each of these devices have performance drawbacks. The major drawbacks of organic photovoltaics is their low absorption rate due to bandgap mismatch with the solar spectrum as well as poor charge carrier mobility and short exciton diffusion length. In order to overcome some of these drawbacks and increase the efficiency of OPVs, we use plasmonic gold nanoparticles (AuNPs). We report 30% increase in the efficiency of bulk-heterojunction OPV after incorporation of 50 nm AuNPs. The optical, electric

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8

Simões, Fábio Donati. "Estudo do impacto do gorjeio (chirp) de transiente sobre o desempenho de sistemas de transmissão óptica com pulsos NRZ." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/18/18133/tde-04072008-090547/.

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Formatos de modulação com capacidade de ajuste às condições variáveis de propagação são de interesse para uso em redes ópticas reconfiguráveis. Alterações nos níveis de potência e no mapa de dispersão afetam o desempenho de sistemas de transmissão, limitando o alcance e a capacidade de reconfiguração da rede. Fornecer capacidade de ajuste dinâmico ao sinal transmitido, sem usar sistemas complexos de modulação ou de compensação variável de dispersão, é uma solução eficaz para se obter rendimento ótimo nas diversas condições de propagação na rede. Esta característica também é útil na instalação

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9

Fourcade, Dutin Coralie. "Réduction de la durée d’impulsions laser par des techniques extra et intra-cavité : post-compression d’impulsions femtosecondes énergétiques et modulation spectrale des pertes dans un pré-amplificateur Ti˸saphir." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14298/document.

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La course vers les impulsions ultra-courtes et énergétiques est en plein essor avec le développement de nombreuses applications. Dans ce manuscrit, plusieurs méthodes de réduction de la durée d'impulsion énergétique sont étudiées. La mise en oeuvre d’un système de post-compression basé sur le principe de SPM-NER dans une lame de silice a tout d'abord permis de produire, à partir d'impulsions de 50 fs, des impulsions de 16 fs-5mJ. Dans une seconde partie, nous proposons une nouvelle méthode de post-compression efficace basée sur l'ionisation d'un gaz rare dans un capillaire creux. Cette techniq

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10

Labaye, François. "Amplification passive d'un laser à fibre optique dans une cavité Fabry-Perot : application à la production de rayonnement gamma par diffusion Compton inverse." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00837822.

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La nécessité de prouver l'existence de nouvelles particules comme les quarks et le boson de Higgs a entrainé le développement de deux nouveaux pans de la recherche : la physique des hautes énergies ou physique des particules, dédiée à prouver expérimentalement l'existence de ces particules puis à étudier leurs propriétés et la physique des accélérateurs, dédiée au développement de nouveaux instruments pour la physique des hautes énergies.Dans ce contexte, des collisionneurs linéaires électrons/positrons polarisés de forte luminosité dont l'énergie serait connue et accordable pourrait permettre

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11

Talisa, Noah Brodzik. "Laser-Induced Damage and Ablation of Dielectrics with Few-Cycle Laser Pulses." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1609243476481238.

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12

Boughdad, Omar. "Fluides de lumière dans un milieu non-linéaire photoréfractif." Thesis, Université Côte d'Azur, 2020. http://www.theses.fr/2020COAZ4014.

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L’objet de cette thèse est l’étude expérimentale des comportements hydrodynamiques d’un faisceau laser se propageant dans un milieu à réponse non-linéaire. Pour un milieu presentant un indice de réfraction qui depend de l’intensité du laser, ainsi que dans le cadre de l’approximation paraxiale, l’intensité du faisceau est assimilée à une densité de fluide. L’axe de propagation représente le temps d’évolution du fluide, le gradient de phase du faisceau définit sa vitesse d’écoulement et la variation de l’indice de réfraction permet de définir une vitesse du son dans le fluide. Dans le cadre de

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13

Huang, Tzu-Yen, and 黃子彥. "Implement phase-modulation duobinary modulation system (PMDBM) using single one modulator with high SPM tolerance." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/86603547541861370710.

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碩士<br>國立清華大學<br>通訊工程研究所<br>93<br>In recent years, optical duobinary transmission (DBT) system is very attractive because of its narrow spectral width and high chromatic dispersion tolerance. In linear regime, a 10 Gb/s optical duobinary signal can be transmitted over 200 km of standard single-mode fiber (SMF) without any compensation device. However, in the nonlinear regime with self-phase modulation (SPM), the improvement in dispersion tolerance of DBT decrease rapidly duo to SPM limit. In order to improve the SPM effect, the method is inducing the chirp signal to maintain the balance between

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14

Pathmanathan, Mehanathan. "Phase advance modulation of low-cost power electronic converters for SPM wind turbine generators." Thesis, 2012. http://hdl.handle.net/2440/80724.

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This research investigates the control of low-cost power electronic converters for small-scale wind turbines under standalone applications. The system utilizes a surface permanent magnet (SPM) generator operating with a semi-bridge switched-mode rectifier (SMR) into a DC voltage load. Conventional control of a semi-bridge SMR results in lower output power than an inverter (i.e. fully-controlled voltage source rectifier) due to the SMR’s inability to control its input power factor. Phase-advance modulation was introduced by Rivas et al. as a method of generating increased output power from a se

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15

Le, Blanc Stephen Paul. "Plasma-induced self-phase and cross-phase modulation of femtosecond laser pulses." Thesis, 1994. http://hdl.handle.net/1911/16750.

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The spectral, temporal, and spatial characteristics of plasma-induced self-phase and cross-phase modulation in rare gases have been investigated using a femtosecond KrF excimer laser focused to peak intensities of 10$\sp{14}$-10$\sp{15}$ W cm$\sp{-2}.$ The quiver energy of a free electron under these conditions is less than the ionization potential of all rare gases, ensuring that ionization occurs only by optical field-induced processes. Spectral blueshifts of up to 2 nm have been observed, and the blueshifted spectra show an oscillatory structure. The blueshifted spectra are shown to be the

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16

Chu, Chia-Wei, and 朱家葦. "Studies of Self-Phase Modulation in Azo Dye-doped Liquid Crystals." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/93678152022657054387.

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碩士<br>國立成功大學<br>物理學系碩博士班<br>97<br>Abstract In this thesis, we study the photo-induced reorientation of liquid crystals doped with azo dyes (D2) by observing the diffraction patterns resulting from self-phase modulation. Self-phase modulation results from that the pump laser induces the change of refractive index of the sample, which influences the phase of the pump laser itself, and then causes a diffraction pattern in the far field. The number of diffraction ring is proportional to the change of refractive index in the central part of illuminated region. The more change of refractive index i

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17

KE, ZHI-REN, and 柯智仁. "One dimension spatial self-phase modulation effect in liquid crystal films." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/08193392599236823214.

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18

Chu, Kuan-Yu, and 朱冠宇. "A Three Dimensional Measurement Method Using the Technology of Laser self-mixing Sinusoidal Phase Modulation." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/93rm3s.

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碩士<br>國立中興大學<br>機械工程學系所<br>105<br>This research develop and utilize a laser diode self-mixing based three dimensional sensor, and apply to the contact probe for trigger signal measurement. The components of the three dimensional sensor system are including a laser diode, a quadrant photodiode, a beam splitter and a glass ball lens. The glass ball lens is combined with a contact probe mechanism, and placed at the straight front of the laser diode, and through measuring with the contact probe mechanism, the reflected laser light spot of the glass ball lens will cause voltage variation on the qua

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19

Jyh-Wei, Lin, and 林智偉. "Self-Phase Modulation and Fast Switching Enhanced Pulse Generation in an Actively Mode-Locked Nd:YLF Laser." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/63493350454865970615.

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碩士<br>國立中山大學<br>光電工程學研究所<br>86<br>Synthesized high-speed pulse generator was employed to drive an acousto-optic modulator in an AM mode-locked Nd:YLF laser. The result shown that pulsegenerated shorter than 10 ps at a repetition rate of 200 MHz with an average output power of 600 mW. A close form model based on gaussian approximation was built toestimate pulse width. A complete time domain model was used to study pulseevolution in AM mode-locked laser with self-phase modulation. Both self-phase modulation and fast switching enhanced pulse-shaping ability were primary causes for the low ratio b

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20

Shen, T. L., and 沈宗麟. "Laser heating and spatial self-phase modulation effect in nematic liquid crystal film with Nd:YAG laser light." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/18231851517899518999.

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碩士<br>國立交通大學<br>電子物理學系<br>83<br>We disscuss that the laser heating effect can add the maximun rotion angle of liquid crystal within 1.06 micron metter Nd:YAG laser. By the measurement of the diffraction patterns induced by the spatial sefl-phase modulation effect it can help us to realize the temperature icrement of the sample. We found that there was Freederiscksz transition and the threshold insity consistent with our calculation. The number of rings that we measured was fewer then we cal

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21

"Multi-wavelength all-optical regeneration based on self-phase modulation and inter-channel walk-off control in fiber." 2009. http://library.cuhk.edu.hk/record=b5894074.

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Chong, Kin Man.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 2009.<br>Includes bibliographical references (p. 58-63).<br>Abstract also in Chinese.<br>Acknowledgement --- p.i<br>Abstract --- p.ii<br>摘要 --- p.iv<br>Table of contents --- p.vi<br>List of figures and tables --- p.viii<br>Chapter Chapter 1 --- Introduction --- p.1<br>Chapter 1.1. --- Overview of optical regeneration --- p.1<br>Chapter 1.1.1. --- O-E-O regeneration --- p.3<br>Chapter 1.1.2. --- All-optical regeneration --- p.5<br>Chapter 1.2. --- Motivation of this thesis --- p.7<br>Chapter 1.3. --- Outline of this

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22

Chu, Hsuan-Hao, and 褚軒豪. "High loss budget and high capacity employing self-phase modulation in long-reach passive optical networks OFDM system." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/69556824276803935472.

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碩士<br>國立交通大學<br>光電工程研究所<br>102<br>In order to meet the demand of broadband in the future, the FSAN (Full Service Area Networks) will set the standard for next-generation passive optical network (NGPON), which is named as the NGPON2. The NGPON2 provides 40-Gbps capacity to support 1-Gbps data rate for optical network unit (ONU), and cover the distance from 20-km to 100-km. Consequently, the Optical OFDM PON with intensity modulation and direction (IMDD) is very suitable for NGPON2 system because the method offer high spectral efficiency and flexible bandwidth allocation. However, the Optical

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23

Chiu, Jin-Chen, and 邱金城. "Study on Nonlinear Self-Phase Modulation Enhancement in Passive Mode Locked Fiber Laser with Single-Wall Carbon Nanotube Saturable Absorber." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/22147616970849188470.

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博士<br>國立中山大學<br>光電工程學系研究所<br>99<br>The dependence of thickness and concentration product (TCP) of single-wall carbon nanotubes saturable absorber (SWCNTs SA) on stabilizing and shortening pulse width in passively mode-locked erbium-doped fiber ring laser (MLEDFL) was investigated and measured. The TCP represented the amounts of SWCNTs, which the optical beam encountered when passing through the SWCNTs SA. If the TCP was smaller than 8.25 (μm x wt%), the spectral bandwidth was below 2 nm. The pulse shaping was dominated by its own self amplitude modulation (SAM) of SWCNTs SA. With further incre

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CHUNG, SUNG HAN. "Wavelength-Preserving Polarization-Insensitive All-Optical 3R Regenerator Based on Self- and Cross-Phase Modulation and Offset Filtering Utilizing Raman Amplification." Thesis, 2009. http://hdl.handle.net/1974/5278.

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Optical regeneration has the potential to significantly increase the reach of long-haul transmission systems. In this thesis, wavelength-preserving polarization-insensitive all-optical 3R regeneration is investigated and demonstrated for 10 and 40 Gb/s signals. The all-optical regenerator utilizes a self-pulsating laser for clock recovery, cross-phase modulation (XPM) based spectral broadening in a highly nonlinear fiber (HNLF) and offset filtering for retiming, and self-phase modulation based spectral broadening in a HNLF and offset filtering for reshaping. Raman amplification is used to incr

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25

Li, Baolei. "Novel Nonlinear Microscopy Techniques Based on Femtosecond Laser Pulse Shaping and Their Applications." Diss., 2013. http://hdl.handle.net/10161/7099.

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<p>Nonlinear optical microscopy serves as a great tool for biomedical imaging due to its high resolution, deep penetration, inherent three dimensional optical sectioning capabilities and superior performance in scattering media. Conventional nonlinear optical microscopy techniques, e.g. two photon fluorescence and second harmonic generation, are based on detecting a small light signal emitted at a new wavelength that is well separated from the excitation light. However, there are also many other nonlinear processes, such as two-photon absorption and self-phase modulation, that do not generate

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