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Dual-frequency Optoelectronic Oscillator and Its Application in Transverse Load Sensing

Dual-frequency Optoelectronic Oscillator and Its Application in Transverse Load Sensing
Author: Fanqi Kong
Publisher:
Total Pages:
Release: 2014
Genre: University of Ottawa theses
ISBN:

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In this thesis, dual-frequency optoelectronic oscillators (OEOs) and their applications to transverse load sensing are studied. Two configurations of dual-frequency OEOs are proposed and investigated. In the first configuration, a polarization-maintaining phase-shifted fiber Bragg grating (PM-PSFBG) is employed in the OEO loop to the generation of two oscillating frequencies. The beat between the two oscillating frequencies is a function of the load applied to the PM-PSFBG, which is used in transverse load sensing. To avoid the frequency measurement ambiguity, a second configuration is proposed by coupling a dual-wavelength fiber laser to the dual-frequency OEO. A single tone microwave signal with the frequency determined by the birefringence of the grating is generated in the OEO and is fed into the fiber ring laser to injection lock the dual wavelengths. The sensitivity and the resolution are measured to be 9.73 GHz/(N/mm) and 2.06×10-4 N/mm, respectively. The high stability of the single-tone microwave signal permits accurate measurement, while the frequency interrogation allows an ultra-high speed demodulation.


Microwave Photonics

Microwave Photonics
Author: Jianping Yao
Publisher: John Wiley & Sons
Total Pages: 501
Release: 2024-03-26
Genre: Science
ISBN: 1394205287

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MICROWAVE PHOTONICS Overview of techniques in the field of microwave photonics, including recent developments in quantum microwave photonics and integrated microwave photonics Microwave Photonics offers a comprehensive overview of the microwave photonic techniques developed in the last 30 years, covering topics such as photonics generation of microwave signals, photonics processing of microwave signals, photonics distribution of microwave signals, photonic generation and distribution of UWB signals, photonics generation and processing of arbitrary microwave waveforms, photonic true time delay beamforming for phased array antennas, photonics-assisted instantaneous microwave frequency measurement, quantum microwave photonics, analog-to-digital conversion and more. The text is supported by a companion website for instructors, including learning objectives and questions/problems to further enhance student learning. Written by key researchers in the field, Microwave Photonics includes information on: Group-velocity dispersion and nonlinear effects in fibers, light coherence in light sources, phase and intensity modulators, photodetectors, and fiber Bragg gratings Injection locking, phase lock loops, external modulation, opto-electronic oscillators, and array waveguide gratings Photonic microwave delay-line filters with negative and complex coefficients and non-uniformly spaced photonic microwave delay-line filters Double- and single-sideband modulation, radio over fiber networks, and microwave photonics to coherent communication systems UWB generation, coding, and distribution over fiber, and instantaneous microwave frequency measurement via power monitoring True time delay beamforming Exploring the subject in depth, with expansive coverage of techniques developed in the last 30 years, Microwave Photonics is an essential reference for graduate students and researchers to learn microwave photonic technologies.


Fiber Optics

Fiber Optics
Author: Guillermo Huerta-Cuellar
Publisher: BoD – Books on Demand
Total Pages: 192
Release: 2021-11-24
Genre: Science
ISBN: 1839696265

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The importance and necessity of communications systems have become evident during the COVID-19 pandemic. The development of new technologies that permit the best performance of these systems is paramount, and optical fibers play an important role in this area. This book examines new technological developments to improve optical fiber technology, with applications in communications systems, optoelectronics integration, and the scientific study of live microorganisms such as bacteria, viruses, fungi, and protozoa.


Optics Letters

Optics Letters
Author:
Publisher:
Total Pages: 798
Release: 2001
Genre: Optics
ISBN:

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Publications

Publications
Author: United States. National Bureau of Standards
Publisher:
Total Pages: 480
Release: 1991
Genre: Government publications
ISBN:

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The Engineering Index Annual

The Engineering Index Annual
Author:
Publisher:
Total Pages: 2264
Release: 1992
Genre: Engineering
ISBN:

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Since its creation in 1884, Engineering Index has covered virtually every major engineering innovation from around the world. It serves as the historical record of virtually every major engineering innovation of the 20th century. Recent content is a vital resource for current awareness, new production information, technological forecasting and competitive intelligence. The world?s most comprehensive interdisciplinary engineering database, Engineering Index contains over 10.7 million records. Each year, over 500,000 new abstracts are added from over 5,000 scholarly journals, trade magazines, and conference proceedings. Coverage spans over 175 engineering disciplines from over 80 countries. Updated weekly.


Handbook of Modern Sensors

Handbook of Modern Sensors
Author: Jacob Fraden
Publisher: Springer Science & Business Media
Total Pages: 596
Release: 2006-04-29
Genre: Technology & Engineering
ISBN: 0387216049

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Seven years have passed since the publication of the previous edition of this book. During that time, sensor technologies have made a remarkable leap forward. The sensitivity of the sensors became higher, the dimensions became smaller, the sel- tivity became better, and the prices became lower. What have not changed are the fundamental principles of the sensor design. They are still governed by the laws of Nature. Arguably one of the greatest geniuses who ever lived, Leonardo Da Vinci, had his own peculiar way of praying. He was saying, “Oh Lord, thanks for Thou do not violate your own laws. ” It is comforting indeed that the laws of Nature do not change as time goes by; it is just our appreciation of them that is being re?ned. Thus, this new edition examines the same good old laws of Nature that are employed in the designs of various sensors. This has not changed much since the previous edition. Yet, the sections that describe the practical designs are revised substantially. Recent ideas and developments have been added, and less important and nonessential designs were dropped. Probably the most dramatic recent progress in the sensor technologies relates to wide use of MEMS and MEOMS (micro-electro-mechanical systems and micro-electro-opto-mechanical systems). These are examined in this new edition with greater detail. This book is about devices commonly called sensors. The invention of a - croprocessor has brought highly sophisticated instruments into our everyday lives.


Japanese Science and Technology, 1983-1984

Japanese Science and Technology, 1983-1984
Author: United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch
Publisher:
Total Pages: 1080
Release: 1985
Genre: Science
ISBN:

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