Download or read book Measurement and Data Analysis of Strained Quantum Well Lasers written by Chun-Yu Shih and published by . This book was released on 1994 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Strained Layer Quantum Wells and Their Applications written by M. O. Manasreh and published by CRC Press. This book was released on 1997-12-23 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductor devices based on lattice mismatched heterostructures have been the subject of much study. This volume focuses on the physics, technology and applications of strained layer quantum wells and superlattices, featuring chapters on aspects ranging from theoretical modeling of quantum-well lasers to materials characterization and assessment by the most prominent researchers in the field. It is an essential reference for both researchers and students of semiconductor lasers, sensors and communications.

Download or read book Quantum Well Laser Array Packaging written by Jens W. Tomm and published by McGraw Hill Professional. This book was released on 2007 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum-well lasers offer the promise of lightning-fast data communications - 10-to-100 times faster than broadband. While the architecture for these devices already exists, they suffer from material packaging problems. This book addresses this critical issue. It offers screening and packaging techniques useful for researchers.

Download or read book Physics of Strained Quantum Well Lasers written by John P. Loehr and published by Springer Science & Business Media. This book was released on 2013-11-27 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: When this publisher offered me the opportunity to \\Tite a book, some six years ago, I did not hesitate to say yes. I had just spent the last four years of graduate school struggling to understand the physics of strained quantum well lasers, and it seemed to me the whole experience was much more difficult that it should have been. For although many of the results I needed were easy to locate, the underlying physical premises and intervening steps were not. If only I had a book providing the derivations, I could have absorbed them and gone on my way. Such a book lies before you. It provides a unified and self-contained descrip tion of the essential physics of strained quantum well lasers, starting from first principles whenever feasible. The presentation I have chosen requires only the standard introductory background in quantum mechanics, solid state physics, and electromagnetics expected of entering graduate students in physics or elec trical engineering. A single undergraduate course in each of these subjects should be more than sufficient to follow the text. :'Iore advanced material on quantum mechanics is developed and collected in the first chapter. \Vhen pos sible, I have presented the results in a general setting and have later applied them to specific cases of interest. I find this the most satisfying way to ap proach the subject, and it has the additional benefit of solving many problems once and for all.

Download or read book Quantum Well Lasers written by Peter S. Zory Jr. and published by Elsevier. This book was released on 2012-12-02 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the information necessary for the reader to achieve a thorough understanding of all aspects of QW lasers - from the basic mechanism of optical gain, through the current technolgoical state of the art, to the future technologies of quantum wires and quantum dots. In view of the growing importance of QW lasers, this book should be read by all those with an active interest in laser science and technology, from the advanced student to the experienced laser scientist. * The first comprehensive book-length treatment of quantum well lasers * Provides a detailed treatment of quantum well laser basics * Covers strained quantum well lasers * Explores the different state-of-the-art quantum well laser types * Provides key information on future laser technologies

Download or read book A Study of Long Wavelength Strained Quantum well Lasers written by Ming-Cheng Wang and published by . This book was released on 1993 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, the device physics of long wavelength strained quantum-well lasers is explored both experimentally and theoretically. The goal of this study is to understand how to optimize laser materials (active region and cladding layer) and cavity parameters (barrier height) so that the high-temperature, high-speed and long-term reliability characteristics of strained quantum-well lasers can be improved. First, the strain effects on static lasing characteristics, including threshold currents and temperature sensitivities, of strained quantum-well lasers are investigated. Radiative recombination rates and nonradiative Auger recombination rates of 1.55 $mu$m strained InGaAs/AlGaInAs quantum-well systems are measured using time-resolved picosecond photoluminescence techniques. Strain dependence of optical gains, spontaneous emission rates, and Auger recombination rates are examined theoretically, taking into account the valence band mixing effects. Both compressive and tensile strained quantum-well lasers are shown to be intrinsically capable of achieving better temperature performance than that of unstrained quantum-well lasers. Second, high-voltage electron-beam-induced-current (HV-EBIC) imaging is used to study the degradation of commercial 0.98 $mu$m strained quantum-well lasers. The reliability of 0.98 $mu$m InGaAs/AlGaAs strained quantum-well lasers is found to be limited by the developments of facet defects, caused by the nonradiative surface recombination in the cladding layers at the laser facet. Third, the high-temperature modulation dynamics of 1.3 $mu$m AlInGaAs/AlInGaAs strained quantum-well lasers with various barrier heights are investigated. Differential gains and nonlinear gain factors are independently measured using the parasitic-free optical modulation technique. It is concluded that a sufficient barrier height is necessary to reduce the temperature sensitivity of the differential gain, which ensures better high-speed performance at high temperature.

Download or read book Study of Type I and Type II Strained Quantum well Lasers written by Guobin Liu and published by . This book was released on 2001 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Physics and Applications of Strained Quantum Wells and Quantum Well Lasers written by Yao Zou and published by . This book was released on 1993 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis Design and Fabrication of Low Threshold Semiconductor Lasers Using Compressively Strained Quantum Wells written by Julian S. Osinski and published by . This book was released on 1992 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling and Simulation of Strained Quantum Wells in Semiconductor Lasers written by and published by . This book was released on 2000 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Bandwidth Direct Modulation of Distributed Feedback Quantum Well Lasers written by and published by . This book was released on 2000 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wide-bandwidth microwave modulation of semiconductor strained quantum-well lasers using distributed feedback structures plays an important role in high bit-rate optical communication systems. It is therefore critical to conduct research on the device physics of strained semiconductor quantum-well lasers under high-frequency modulation and on the creation of new techniques to characterize high-speed quantum-well lasers. The goals of this project are (1) to design and fabricate high bandwidth distributed feedback quantum- well lasers using strain effects and (2) to combine microwave and optical measurement techniques to investigate the physics and device performance of quantum-well lasers under high-speed modulation conditions. The project is interdisciplinary in nature since optoelectronic device technology, microwave and optical measurement techniques will be introduced to the study of high-frequency modulation of quantum-well lasers for optical communication systems.

Download or read book Characterization of Strained Quantum Well Tunneling Injection and Separate Confinement Heterostructure Lasers written by Howard Yoon and published by . This book was released on 1996 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Study of Strained layer Quantum Well Semiconductor Heterostructure Lasers written by Ter Hoe Loh and published by . This book was released on 1993 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling and Characterization of Strained Quantum well Lasers and Modulators written by Chih-Sheng Chang and published by . This book was released on 1996 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strained quantum-well lasers and modulators are studied in this dissertation. Both dc and high-speed performances of these two devices are studied. Theoretical models are developed, and we show very good agreement between the theoretical and experimental results. Strain and quantum size effects on the optical-matrix elements for both TE and TM polarizations of strained quantum wells are studied theoretically, including the spin-orbit coupling. A set of universal curves for the polarization-dependent optical-matrix elements as a function of strain is shown. These curves are very helpful for a quick estimate of the optical-matrix elements for strained quantum-well structures. A complete model with the spin-orbit coupling for strained quantum-well lasers is then presented. Explicit formulas for the momentum-matrix elements are given. The improvement in the threshold current density of tensile strained quantum-well lasers, as compared with that of the unstrained quantum well, is shown to result from the enhanced momentum matrix. The theoretical results show a smaller linewidth enhancement factor for compressively and tensile strained quantum wells than that of the unstrained structure, as has been experimentally observed. Amplified spontaneous emission spectroscopy is used to extract the gain and refractive index spectra systematically. The measured optical gain and refractive index are then compared with our theoretical model for strained quantum-well lasers. We show that a comprehensive theoretical model for calculating the electronic band structure, the optical constants, and the linewidth enhancement factor agrees very well with the experiment. Nonlinear gain coefficients are modeled based on the two-level density matrix formalism. Both spectral-hole burning and carrier beating vibration are included for strained quantum-well structures. Formulas for both self- and cross-polarization nonlinear coefficients are presented. A theoretical model for strained quantum-well modulators including the spin-orbit coupling is then presented. The exciton equation is solved in the momentum space. The symmetrical properties of the exciton Hamiltonian are investigated carefully and shown to reduce the computation time. An interpolation scheme is proposed to properly take into account the continuous exciton states. The strained effects on the performances of modulators are shown and compared with the experimental data.

Download or read book Valence Band Structures of a Strained Quantum Well and Applications to Semiconductor Lasers written by Shun-Lien Chuang and published by . This book was released on 1992 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strain effects in quantum wells have been intensively investigated for applications to semiconductor lasers, photodetectors and electronic devices such as pseudomorphic high electronic mobility transistors. High quantum efficiency, high power (70 mW CW and 180 mW pulsed operation), modulation-doped In0.8Ga0.2As strained-layer (compression) quantum-well lasers emitting at 1.5 um wavelength have been reported. A record high power output (206 mW CW) strained-layer InGaAs/InP quantum-well laser emitting at 1.48 to 1.51 um using the effects of tension strain has been demonstrated. A very low threshold (92 A/cm2) strained-layer quantum-well laser at 1.6 um has also been obtained.

Download or read book NASA Tech Briefs written by and published by . This book was released on 1994 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: