High Frequency Continuous Wave Optical Modulation Via Stimulated Raman Scattering
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Author | : David Claiborne Gold |
Publisher | : |
Total Pages | : 0 |
Release | : 2020 |
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ISBN | : |
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 | : |
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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 | : 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 |
Publisher | : |
Total Pages | : 4 |
Release | : 1992 |
Genre | : |
ISBN | : |
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 | : |
Publisher | : |
Total Pages | : 490 |
Release | : 1990 |
Genre | : Aeronautics |
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Author | : Ali Javan |
Publisher | : |
Total Pages | : 27 |
Release | : 1967 |
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ISBN | : |
A report is given of the continuation of earlier experiments on motional narrowing of the linewidth of Raman scattering in hydrogen molecules. This narrowing, which has now been observed in spontaneous Raman scattering is being studied in detail. The report contains also details of the instrumentation of the Raman spectrometer which utilizes a single mode, frequency stabilized, high power Argon laser. Also reported is the development and application of a new spectroscopic technique to ultra-high resolution studies of atomic line centers. It involves a line narrowing effect induced by laser radiation and the measured quantities are precise values of isotope shifts in levels of Ne. (Author).
Author | : |
Publisher | : |
Total Pages | : 304 |
Release | : 1962 |
Genre | : Lasers |
ISBN | : |
Author | : Nicolae C. Panoiu |
Publisher | : Elsevier |
Total Pages | : 514 |
Release | : 2023-09-18 |
Genre | : Technology & Engineering |
ISBN | : 0323908284 |
Fundamentals and Applications of Nonlinear Nanophotonics includes key concepts of nonlinear nanophotonics, computational and modeling techniques to design these materials, and the latest advances. This book addresses the scientific literature on nanophotonics while most existing books focus almost exclusively on the linear aspects of light-matter interaction at the nanoscale. Sections cover nonlinear optics of sub-wavelength photonic nanostructured materials, review nonlinear optics of bound-states in the continuum, nonlinear optics of chiral plasmonic metasurfaces, nonlinear hyperbolic nanomaterials, nonlinear topological photonics, plasmonic lattice solitons, and more. This book is suitable for academics and industry professionals working in the discipline of materials science, engineering and nanotechnology. Discusses advances in nonlinear optics research such as plasmonics, topological photonics and emerging materials Reviews the latest computational methods to model and design nonlinear photonic materials Introduces key principles of advanced concepts in nonlinear optics of bound-states in a continuum and symmetries in nonlinear nano-optics
Author | : Mohammad N. Islam |
Publisher | : Springer |
Total Pages | : 457 |
Release | : 2007-06-04 |
Genre | : Technology & Engineering |
ISBN | : 0387215859 |
This edited monograph is written by leading experts in this area and is the first book entirely devoted to Raman amplification. Three sections include extensive background on Raman physics, descriptions of sub-systems and modules utilizing Raman technology, and a review of current state-of-the-art systems.
Author | : United States. National Aeronautics and Space Administration |
Publisher | : |
Total Pages | : 450 |
Release | : 1965 |
Genre | : Lasers |
ISBN | : |