Injection Lasers in Optical Communication and Information Processing Systems PDF Download

Author:
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ISBN:
Category : Computers
Languages : en
Pages : 344

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The original Russian-language version was published in 1987 (Nauka House). The contributions address the generation of ultrashort light pulses by injection lasers; the application of semiconductor resonance amplifiers for the detection and communication of optical signals; GaAlAs injection laser rad

Author: I︠U︡. M. Popov
Publisher:
ISBN:
Category :
Languages : en
Pages : 325

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Author: Hyuk-Kee Sung
Publisher:
ISBN:
Category :
Languages : en
Pages : 318

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Semiconductor lasers are essential components that enable high-speed long-haul communication and have been widely used for various applications in photonics technology. Semiconductor lasers under optical injection locking exhibit superior performance over free-running lasers and provide useful applications not achievable through the free-running lasers. The performance of injection-locked lasers has been found to be significantly improved with stronger injection. In this dissertation, the characteristics and applications of semiconductor lasers under strong optical injection locking are presented and analyzed in various aspects. First, ultra-strong (injection ratio R ̃10 dB) optical injection locking properties are investigated experimentally and theoretically. Direct modulation responses of ultra-strong optical injection-locked distributed feedback (DFB) lasers show three distinctive modulation characteristics depending on frequency detuning values. These different optical properties and electric modulation characteristics can be utilized in various applications such as analog fiber optic link, broadband digital communications, RF photonics and opto-electronic oscillators (OEOs). Using the strong injection-locked lasers, a novel single sideband generation has been demonstrated. A modulation sideband on the longer wavelength side is enhanced due to the resonant amplification by the slave laser's cavity mode, resulting in a 12-dB asymmetry at 20-GHz RF modulation. The dispersion limited RF bandwidth has been greatly increased by maintaining the variation of fiber transmission response within 7 dB up to 20-GHz RF carrier frequency over 80-km fiber transmission. Second, to improve fiber optic link performances, gain-lever distributed Bragg reflector (DBR) lasers have been fabricated. With a gain-lever modulation, 9-dB increase of a link gain has been achieved compared with a standard modulation.

Author: Thomas F. George
Publisher: Nova Publishers
ISBN: 9781590337226
Category : Science
Languages : en
Pages : 266

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These twelve chapters, written by scientists from around the world, provide a representative sampling of the latest advances in theoretical physics. The book is divided in five sections, addressing the following topics: optics and quantum mechanics, relativity and cosmology, nuclear physics, thermodynamics and mathematics.

Author: Volʹdemar Smilga
Publisher: Nova Publishers
ISBN: 9781560721611
Category : Science
Languages : en
Pages : 436

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Muon Method in Science

Author: I. Ladany
Publisher:
ISBN:
Category :
Languages : en
Pages : 87

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An outline is given of the basic parameters which control the operation and life expectancy of cw laser diodes. This includes a different approach to the laser design problem than that generally used and leads to a modified expression for the threshold current density. Results of this analysis are used to develop a cw laser structure that combines a low threshold with a low vertical beam spread, the latter being essential to the achievement of low coupling losses needed in fiber-optic communication systems. Other design requirements are reviewed, and electrical and optical performance data of lasers developed under this contract are presented. Based on extensive experimental measurements, the reliability aspects of cw lasers are discussed. Facet erosion is shown to be a major failure mode, and methods are given for limiting the influence of this effect. With a suitable coating applied to the facet, lasers fabricated during this contract have accumulated 6000 hours of life without significant output decrease. Similar lasers, without facet protection, have accumulated more than 10,000 hours of operating time with output decreasing gradually, as a consequence of facet erosion. A laser system has been developed, which includes thermal stabilization utilizing thermoelectric coolers and fan coooling for heat removal from the hot end of the thermoelectric module. Convection cooling for that purpose has been demonstrated to be adequate under less extreme ambients.

Author: Albert Reimer
Publisher: Nova Publishers
ISBN: 9781590339275
Category : Science
Languages : en
Pages : 340

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This volume presents leading-edge research in physics from researchers around the world. Contents: Preface; Interface-Localised Mode in Bilayer Film Ferromagnetic Resonance Spectrum; On Similarity Waves in Compacting Media; Generalised Relativistic Dynamics of Charged Particle; Deviatoric Elasticity as a Mechanism describing Stable Shapes of Nanotubes; A Thermodynamic Approach for Predicting Micelle and Asphaltene-Micelle Formation; Asymptotic Theories for the Non-linear Analysis of Axisymmetric Laminated Cylindrical Shells; Statistical Dynamics of Energy Transfer in Direct Inelastic Gas-Surface Scattering within Dynamical Lie Algebraic Method; Topologically Charged Vortex in a Supersymmetric Kalb-Ramond Theory; The Effect of Fibre Curvature on Suspension Viscosity; Measurements of Reaction Cross-Sections and Determination of Nucleon Matter Density Distributions; Index.

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 994

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Author: J. K. Srivastava
Publisher: Nova Publishers
ISBN: 9781590336670
Category : Science
Languages : en
Pages : 438

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The articles in this exceptional book contain regular papers, extended papers and reviews, and thus vary in length and are useful for all kinds of audience. They describe, as the book's name suggests, HTSC models and methodologies. Physical models (like extended BCS model, bipolaron model, spin bag model, RVB (resonating valence bond) model, preformed Cooper pairs and antiferromagnetic spin fluctuation (AFSF) based models, stripe phase, paired cluster (spin glass (SG) frustration based) model, Kamimura-Suwa (Hund's coupling mechanism based) model, electron- plasmon interaction, electron- phonon interaction, etc.), theoretical methods (methodologies) (like generalised BCS-Migdal-Eliashberg theory, Hubbard model, t-J model, t-t'-U model, Hubbard-Holstein model, Fermi-, non Fermi- and marginal Fermi- liquid concepts, generalised Hartree-Fock formalism, etc.) and, experimental status and methodologies are all described there. For comparison with cuprates, fullerenes, ruthenates, organic-, non Cu-containing oxide-and conventional (elemental, A15)- superconductors, molecular crystals, nickelates, manganites, borides etc. are also discussed.

Author: Takahiro Numai
Publisher: John Wiley & Sons
ISBN: 1118074424
Category : Technology & Engineering
Languages : en
Pages : 408

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Book Description
In order to develop excellent photonic devices, we have to fully understand the physics behind operations of photonic devices. This book thoroughly teaches the fundamental physics currently applied to the development of photonics devices such as energy bands of semiconductors, optical transitions, optical waveguides, and semiconductor junctions. The book also reviews the characteristics of laser diodes, optical filters, and optical functional devices, which have been developed based on the above physics. These photonic devices have been demonstrated in system applications, and several experimental results are described.