Réalisation du laser à semiconducteurs spectralement pur à 1,5 μ m PDF Download
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Author: Kédro Diomandé
Publisher:
ISBN:
Category :
Languages : fr
Pages : 153
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Book Description
AMELIORATION DE LA PURETE SPECTRALE D'UN LASER A SEMICONDUCTEUR EMETTANT A 1,5 MU PAR ADJONCTION D'UNE CAVITE PASSIVE A LA CAVITE DE LA DIODE. LARGEUR DE RAIE INFERIEURE A 20 KHZ. LASER ACCORDABLE SUR PLUSIEURS DIZAINES DE NANOMETRES. - THEORIE DU LASER A CAVITE ETENDUE. METHODES DE MESURE DE LA LARGEUR DE RAIE DES LASERS A SEMICONDUCTEUR. APPLICATION DU LASER A CAVITE ETENDUE A L'ANALYSE SPECTRALE D'UN LASER A CONTRE REACTION DISTRIBUEE. UTILISATION DU LASER A CAVITE ETENDUE POUR FAIRE UN RELEVE DU SPECTRE D'ABSORPTION DE L'AMMONIAC GAZEUX AUTOUR DE 1,5 MU . DETERMINATION DE LA STABILITE EN FREQUENCE A LONG TERME DU LASER A CAVITE ETENDUE ASSERVI SUR UNE RAIE D'ABSORPTION DE L'AMMONIAC.
Author: Kédro Diomandé
Publisher:
ISBN:
Category :
Languages : fr
Pages : 153
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Book Description
AMELIORATION DE LA PURETE SPECTRALE D'UN LASER A SEMICONDUCTEUR EMETTANT A 1,5 MU PAR ADJONCTION D'UNE CAVITE PASSIVE A LA CAVITE DE LA DIODE. LARGEUR DE RAIE INFERIEURE A 20 KHZ. LASER ACCORDABLE SUR PLUSIEURS DIZAINES DE NANOMETRES. - THEORIE DU LASER A CAVITE ETENDUE. METHODES DE MESURE DE LA LARGEUR DE RAIE DES LASERS A SEMICONDUCTEUR. APPLICATION DU LASER A CAVITE ETENDUE A L'ANALYSE SPECTRALE D'UN LASER A CONTRE REACTION DISTRIBUEE. UTILISATION DU LASER A CAVITE ETENDUE POUR FAIRE UN RELEVE DU SPECTRE D'ABSORPTION DE L'AMMONIAC GAZEUX AUTOUR DE 1,5 MU . DETERMINATION DE LA STABILITE EN FREQUENCE A LONG TERME DU LASER A CAVITE ETENDUE ASSERVI SUR UNE RAIE D'ABSORPTION DE L'AMMONIAC.
Author: Jun Ye
Publisher: Springer Science & Business Media
ISBN: 0387237917
Category : Science
Languages : en
Pages : 373
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Book Description
Over the last few years, there has been a convergence between the fields of ultrafast science, nonlinear optics, optical frequency metrology, and precision laser spectroscopy. These fields have been developing largely independently since the birth of the laser, reaching remarkable levels of performance. On the ultrafast frontier, pulses of only a few cycles long have been produced, while in optical spectroscopy, the precision and resolution have reached one part in Although these two achievements appear to be completely disconnected, advances in nonlinear optics provided the essential link between them. The resulting convergence has enabled unprecedented advances in the control of the electric field of the pulses produced by femtosecond mode-locked lasers. The corresponding spectrum consists of a comb of sharp spectral lines with well-defined frequencies. These new techniques and capabilities are generally known as “femtosecond comb technology. ” They have had dramatic impact on the diverse fields of precision measurement and extreme nonlinear optical physics. The historical background for these developments is provided in the Foreword by two of the pioneers of laser spectroscopy, John Hall and Theodor Hänsch. Indeed the developments described in this book were foreshadowed by Hänsch’s early work in the 1970s when he used picosecond pulses to demonstrate the connection between the time and frequency domains in laser spectroscopy. This work complemented the advances in precision laser stabilization developed by Hall.
Author:
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 760
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Book Description
Author: Kiyo Tomiyasu
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 204
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Book Description
Author: Stephanie Reich
Publisher: John Wiley & Sons
ISBN: 3527618058
Category : Technology & Engineering
Languages : en
Pages : 224
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Book Description
Carbon nanotubes are exceptionally interesting from a fundamental research point of view. Many concepts of one-dimensional physics have been verified experimentally such as electron and phonon confinement or the one-dimensional singularities in the density of states; other 1D signatures are still under debate, such as Luttinger-liquid behavior. Carbon nanotubes are chemically stable, mechanically very strong, and conduct electricity. For this reason, they open up new perspectives for various applications, such as nano-transistors in circuits, field-emission displays, artificial muscles, or added reinforcements in alloys. This text is an introduction to the physical concepts needed for investigating carbon nanotubes and other one-dimensional solid-state systems. Written for a wide scientific readership, each chapter consists of an instructive approach to the topic and sustainable ideas for solutions. The former is generally comprehensible for physicists and chemists, while the latter enable the reader to work towards the state of the art in that area. The book gives for the first time a combined theoretical and experimental description of topics like luminescence of carbon nanotubes, Raman scattering, or transport measurements. The theoretical concepts discussed range from the tight-binding approximation, which can be followed by pencil and paper, to first-principles simulations. We emphasize a comprehensive theoretical and experimental understanding of carbon nanotubes including - general concepts for one-dimensional systems - an introduction to the symmetry of nanotubes - textbook models of nanotubes as narrow cylinders - a combination of ab-initio calculations and experiments - luminescence excitation spectroscopy linked to Raman spectroscopy - an introduction to the 1D-transport properties of nanotubes - effects of bundling on the electronic and vibrational properties and - resonance Raman scattering in nanotubes.
Author: Valerio Causin
Publisher: Springer
ISBN: 331915494X
Category : Technology & Engineering
Languages : en
Pages : 364
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Book Description
This book approaches the analysis of forensic contact traces from a polymer science perspective. The development of characterization methods of new or unusual traces and the improvement of existing protocols is described. The book starts with a general introduction to polymers and the issues related to transfer, persistence and recovery of polymeric traces. The chapters present a distinctive feature of polymers, discussing how it can be measured, what the practical difficulties which can be encountered in the analysis, and how useful that information is for comparison or identification purposes. Practical tips for the realization of the forensic analyses are included.
Author: George Gruner
Publisher: CRC Press
ISBN: 0429969562
Category : Science
Languages : en
Pages : 288
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Book Description
?Density Waves in Solids is written for graduate students and scientists interested in solid-state sciences. It discusses the theoretical and experimental state of affairs of two novel types of broken symmetry ground states of metals, charge, and spin density waves. These states arise as the consequence of electron-phonon and electron-electron interactions in low-dimensional metals.Some fundamental aspects of the one-dimensional electron gas, and of the materials with anisotropic properties, are discussed first. This is followed by the mean field theory of the phases transitions?discussed using second quantized formalism?together with the various experimental observations on the transition and on the ground states. Fluctuation effects and the collective excitations are reviewed next, using the Ginzburg-Landau formalism, followed by the review of the interaction of these states with the underlying lattice and with impurities. The final chapters are devoted to the response of the ground states to external perturbations.
Author: M. Inguscio
Publisher:
ISBN: 9781435677906
Category : Cold gases
Languages : en
Pages : 898
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Book Description
Author: Gregory L. Charvat
Publisher: CRC Press
ISBN: 1439866007
Category : Technology & Engineering
Languages : en
Pages : 416
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Book Description
Radar Expert, Esteemed Author Gregory L. Charvat on CNN and CBSAuthor Gregory L. Charvat appeared on CNN on March 17, 2014 to discuss whether Malaysia Airlines Flight 370 might have literally flown below the radar. He appeared again on CNN on March 20, 2014 to explain the basics of radar, and he explored the hope and limitations of the technology i
Author: Joseph Weber
Publisher: Courier Corporation
ISBN: 0486438872
Category : Science
Languages : en
Pages : 210
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Book Description
An internationally famous physicist and electrical engineer, the author of this text was a pioneer in the investigation of gravitational waves. Joseph Weber's General Relativity and Gravitational Waves offers a classic treatment of the subject. Appropriate for upper-level undergraduates and graduate students, this text remains ever relevant. Brief but thorough in its introduction to the foundations of general relativity, it also examines the elements of Riemannian geometry and tensor calculus applicable to this field. Approximately a quarter of the contents explores theoretical and experimental aspects of gravitational radiation. The final chapter focuses on selected topics related to general relativity, including the equations of motion, unified field theories, Friedman's solution of the cosmological problem, and the Hamiltonian formulation of general relativity. Exercises. Index.
