Continuous Wave Light Modulation Using Stimulated Raman Scattering
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| Total Pages | : 0 |
| Release | : 2014 |
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This thesis focuses on the development of a device that modulates light at molecular frequencies. The purpose of this molecular modulator is to generate a broad, continuous-wave laser spectrum. Our novel approach is based on stimulated Raman scattering in a high-finesse cavity. Using high-intensity intracavity fields, we drive ro-vibrational Raman transitions in a low-density gas of molecular deuterium (or hydrogen). This builds up a molecular coherence between ro-vibrational energy levels. This molecular coherence is then used to modulate a laser beam, generating sidebands that are spaced from the original frequency by multiples of the Raman frequencies, which can exceed 100 THz. The sidebands form a broad, coherent spectrum. Such a spectrum has numerous potential applications including ultrashort pulse generation, precision spectroscopy, and coherent control. To our knowledge, the spectra produced by our molecular modulator are the broadest coherent spectra ever produced in the continuous-wave domain. This thesis describes the generation of a spectrum that has over fifteen spectral components that cover nearly two octaves of optical bandwidth, a wavelength range from 800 nm to 3100 nm. In contrast to molecular modulation methods that are based on pulsed lasers, our continuous-wave approach ensures that each spectral component has a narrow frequency linewidth. In addition to the generation of broad spectra, this thesis describes work that demonstrates the broadband capabilities of molecular modulation and computational work that suggests promising applications for our modulator.
| Author | : David Gold |
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| Total Pages | : 166 |
| Release | : 2020 |
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This thesis describes work towards realizing an efficient, broadband optical modulator at terahertz frequencies. Such a device would have immediate and important implications for atomic physics research and fiber-optic communications, and also serves as the basic building block of the so far elusive arbitrary optical waveform generator. Our modulator is based on the process of continuous-wave molecular modulation, in which stimulated Raman scattering is used to drive coherent oscillations of molecules. We use a high-finesse optical cavity to build up intense laser fields and establish molecular coherence. Using this coherence, we then modulate an independent mixing beam by 90 terahertz, which is the highest rate ever recorded in the continuous-wave regime. We apply this same technique to modulate a pulsed titanium-sapphire laser and show the broadband capability of our modulator and infer its ability to narrow the pulses of the laser. We also describe our recent work to extend our modulation techniques to microresonators, which have the potential for both miniaturization and high modulation efficiency. We demonstrate Raman lasing with one of these microresonators, producing 300 milliwatts of Stokes light, which is two orders of magnitude higher than previously observed in these types of systems.
| Author | : Marvin C. Tobin |
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| Total Pages | : 13 |
| Release | : 1967 |
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The goal of the program was the elucidation of discrepancies between gains for stimulated Raman emission calculated from Q-switch laser experiments and those calculated from spontaneous Raman scattering cross-sections and line widths. Two lines of approach were followed. One approach was a study to explore beam trapping by extensive theoretical and limited experimental means. The second was an attempt to measure the gain for stimulated Raman emission, at very low fields, with a continuous-wave argon laser. The conclusions were that beam-trapping was responsible for the observed anomalous gains and that no anomalous gain was present at low fields.
| Author | : Ji-Xin Cheng |
| Publisher | : Elsevier |
| Total Pages | : 612 |
| Release | : 2021-12-04 |
| Genre | : Science |
| ISBN | : 0323903371 |
Stimulated Raman Scattering Microscopy: Techniques and Applications describes innovations in instrumentation, data science, chemical probe development, and various applications enabled by a state-of-the-art stimulated Raman scattering (SRS) microscope. Beginning by introducing the history of SRS, this book is composed of seven parts in depth including instrumentation strategies that have pushed the physical limits of SRS microscopy, vibrational probes (which increased the SRS imaging functionality), data science methods, and recent efforts in miniaturization. This rapidly growing field needs a comprehensive resource that brings together the current knowledge on the topic, and this book does just that. Researchers who need to know the requirements for all aspects of the instrumentation as well as the requirements of different imaging applications (such as different types of biological tissue) will benefit enormously from the examples of successful demonstrations of SRS imaging in the book. Led by Editor-in-Chief Ji-Xin Cheng, a pioneer in coherent Raman scattering microscopy, the editorial team has brought together various experts on each aspect of SRS imaging from around the world to provide an authoritative guide to this increasingly important imaging technique. This book is a comprehensive reference for researchers, faculty, postdoctoral researchers, and engineers. Includes every aspect from theoretic reviews of SRS spectroscopy to innovations in instrumentation and current applications of SRS microscopy Provides copious visual elements that illustrate key information, such as SRS images of various biological samples and instrument diagrams and schematics Edited by leading experts of SRS microscopy, with each chapter written by experts in their given topics
| Author | : Raymond J. Hawkins |
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| Total Pages | : 4 |
| Release | : 1992 |
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Stimulated Raman scattering can be treated in either the frequency domain or the time domain. Traditionally, cw waves and long optical pulses have been treated in the frequency domain where the problem can be reduced to a set of coupled wave equations which include self and cross phase modulation as well as the Raman gain. Frequency domain analysis, however, becomes intractable for ultrashort optical pulses where spectral bandwidths become comparable to the Raman frequency shift. Here a time domain approach is more appropriate.
| Author | : Anders Höök |
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| Total Pages | : 16 |
| Release | : 1991 |
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| Author | : Ji-Xin Cheng |
| Publisher | : CRC Press |
| Total Pages | : 603 |
| Release | : 2016-04-19 |
| Genre | : Science |
| ISBN | : 1439867666 |
The First Book on CRS MicroscopyCompared to conventional Raman microscopy, coherent Raman scattering (CRS) allows label-free imaging of living cells and tissues at video rate by enhancing the weak Raman signal through nonlinear excitation. Edited by pioneers in the field and with contributions from a distinguished team of experts, Coherent Raman Sc
| Author | : Leonid G. Kazovsky |
| Publisher | : John Wiley & Sons |
| Total Pages | : 407 |
| Release | : 2011-04-20 |
| Genre | : Technology & Engineering |
| ISBN | : 0470922672 |
Broadband optical access network is an ideal solution to alleviate the first/last mile bottleneck of current Internet infrastructures. Richly illustrated throughout to help clarify important topics, Broadband Optical Access Networks covers the architectures, protocols enabling technologies of broadband optical access networks, and all current and future competing technologies for access networks. This comprehensive work presents the evolution of optical access networks, including reach extension, bandwidth enhancement, and discusses the convergence of optical and wireless technologies for broadband access, making it an invaluable reference for researchers, electrical engineers, and graduate students.
| Author | : El-Hang Lee |
| Publisher | : CRC Press |
| Total Pages | : 632 |
| Release | : 2018-09-03 |
| Genre | : Technology & Engineering |
| ISBN | : 142001790X |
Addressing the growing demand for larger capacity in information technology, VLSI Micro- and Nanophotonics: Science, Technology, and Applications explores issues of science and technology of micro/nano-scale photonics and integration for broad-scale and chip-scale Very Large Scale Integration photonics. This book is a game-changer in the sense that it is quite possibly the first to focus on "VLSI Photonics". Very little effort has been made to develop integration technologies for micro/nanoscale photonic devices and applications, so this reference is an important and necessary early-stage perspective on this field. New demand for VLSI photonics brings into play various technological and scientific issues, as well as evolutionary and revolutionary challenges—all of which are discussed in this book. These include topics such as miniaturization, interconnection, and integration of photonic devices at micron, submicron, and nanometer scales. With its "disruptive creativity" and unparalleled coverage of the photonics revolution in information technology, this book should greatly impact the future of micro/nano-photonics and IT as a whole. It offers a comprehensive overview of the science and engineering of micro/nanophotonics and photonic integration. Many books on micro/nanophotonics focus on understanding the properties of individual devices and their related characteristics. However, this book offers a full perspective from the point of view of integration, covering all aspects of benefits and advantages of VLSI-scale photonic integration—the key technical concept in developing a platform to make individual devices and components useful and practical for various applications.
| Author | : Govind P. Agrawal |
| Publisher | : Academic Press |
| Total Pages | : 560 |
| Release | : 2007 |
| Genre | : Science |
| ISBN | : 9780123695161 |
Since the 3rd edition appeared, a fast evolution of the field has occurred. The fourth edition of this classic work provides an up-to-date account of the nonlinear phenomena occurring inside optical fibers. The contents include such important topics as self- and cross-phase modulation, stimulated Raman and Brillouin scattering, four-wave mixing, modulation instability, and optical solitons. Many new figures have been added to help illustrate the concepts discussed in the book. New to this edition are chapters on highly nonlinear fibers and and the novel nonlinear effects that have been observed in these fibers since 2000. Such a chapter should be of interest to people in the field of new wavelengths generation, which has potential application in medical diagnosis and treatments, spectroscopy, new wavelength lasers and light sources, etc. Continues to be industry bestseller providing unique source of comprehensive coverage on the subject of nonlinear fiber optics Fourth Edition is a completely up-to-date treatment of the nonlinear phenomena occurring inside optical fibers Includes 2 NEW CHAPTERS on the properties of highly nonlinear fibers and their novel nonlinear effects
