True Linearized Intensity Modulation For Photonic Analog To Digital Conversion Using An Injection Locked Mode Locked Laser
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True Linearized Intensity Modulation For Photonic Analog To Digital Conversion Using An Injection Locked Mode Locked Laser
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Author : Edris Sarailou
language : en
Publisher:
Release Date : 2015
True Linearized Intensity Modulation For Photonic Analog To Digital Conversion Using An Injection Locked Mode Locked Laser written by Edris Sarailou and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Modulating the saturable absorber provides a reduced third-order intermodulation tone with respect to modulating the gain. This is simply because of the unwanted amplitude modulation created when modulating the gain section current. Finally an improved design is proposed and demonstrated to improve the modulator performance. This is achieved by introducing a third section to the laser. Using the impurity free vacancy disordering technique the photoluminescence peak of this section is blue-shifted selectively and therefore there would not be any absorption in that passive section. By applying the modulation signal to this passive section rather than applying it to the gain section or saturable absorber section, the amplitude and phase modulation could be decoupled. The experimental results have presented here and an almost six-fold reduction in V[subscript pi] and 5 dB improvement in spur free dynamic range have been achieved. The proposed and demonstrated configuration as an analog optical link has the potential to increase the performance and resolution of photonic analog-to-digital converters.
High Performance Photonic Analog To Digital Converter And Low Noise Mode Locked Fiber Lasers
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Author :
language : en
Publisher:
Release Date : 2003
High Performance Photonic Analog To Digital Converter And Low Noise Mode Locked Fiber Lasers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
This project demonstrates three photonic analog-digital converters (ADCs) for high-speed, real-time digitization of microwave signals. The methods consist of a highly parallel photonic ADC, a time-division multiplexed system based on electro-optical Sagnac interferometry, and an alloptical quantizer based upon distributed phase modulation. The core of many photonic ADC designs relies upon a low-noise, actively modelocked fiber laser that has been developed at NRL. Photonic sampling of microwave signals is investigated especially concerning development of a low-noise optical clock. Optimization and system post-processing is simulated and compared with experimental data. Finally, the low-noise optical clock was used in a four-way collaborative research effort where NRL excited and characterized high-speed, high-current photoconductive switches.
Richtlinien Zum K Sener Studium Generale
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Author :
language : en
Publisher:
Release Date : 1963
Richtlinien Zum K Sener Studium Generale written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with categories.
Photonic Crystal Enhanced Electrooptic Polymer Based Optical Modulators For Realization Of Integrated 40 Gs S All Optical Analog Digital Converters With 8 Effective Number Of Bits
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Author : Kai Wei
language : en
Publisher:
Release Date : 2021
Photonic Crystal Enhanced Electrooptic Polymer Based Optical Modulators For Realization Of Integrated 40 Gs S All Optical Analog Digital Converters With 8 Effective Number Of Bits written by Kai Wei and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with Analog-to-digital converters categories.
High-speed, broadband, and compact analog-to-digital converters (ADC) are the key components in signal waveform generation and efficient detection for future telecommunication and remote sensing applications. Canonical electronic ADCs suffers from limited effective number of bits (ENOB) at giga-sampling rate due to electronic clock aperture jitter and comparator ambiguity due to the transistor bandwidth limitations. An electrically interleaved ADC operating at lower sampling rates or a hybrid ADC using optically sampled and electrically quantized structures that leverages the low optical aperture jitter of mode-locked laser and high-resolution electronic quantization are not only power consuming but are also limited in effective sampling rate within 10 GS/s as the quantizer outputs still must be accurately aligned in time to form the input information in electronic domain. On the other hand, the reported all-optical ADC (AOADC) benefits from the low jitter of optical clock, while quantizes the input signal in optical domain using spatial modulation. In this dissertation, various design innovations leading to paths of a fully integrated 40 GS/s AOADC with 8 ENOB by incorporating integrated stable clock using self-forced optical phase modulator (PM) based opto-electronic oscillators (OEO) and single-channel spatial light modulator (SLM) by advancing research innovations of the past laboratory graduates.Design of optical PM and SLM designs are based on broadband traveling-wave coupled microstrip (CMS) electrode structures with improved phase and angular deflection modulation using slow-waveguiding behavior of 1-D photonic crystal (PhC) topologies as superstrate using optical beam propagation (OptiBPM), finite-difference-time-domain (OptiFDTD), and finite element method (HFSS). Optimized design geometries of 1-D PhC over 1550 nm is considered to minimize the optical loss while the modulation sensitivity is enhanced by about 108% compared to modulator designs without the PhC layer. Similar spatial modulation sensitivity improvements are achieved for SLMs with leaky wave designs. These designs are implemented on low-cost Si-photonics and electro-optic (E-O) chromophores on low loss and higher index PMMI host material rather than standard PMMA. Novel design of OEO based on PM rather than Mach-Zehnder modulator (MZM) has advantage of bias voltage independence that makes OEO less sensitive to shift in bias voltage due to piezo-electric or pyro-electric properties of E-O material, but then requires phase to intensity modulators (PM-IM). Sagnac-loop based OEO is demonstrated, where close-in to carrier phase noise at 10 GHz are reduced using self-forced techniques of self-injection locking and dual self-phase-locked loop (SILDPLL) for long-term stability of optical clocks to predict timing jitter as low as 19.5 fs using 3-/5-km fiber mandrills in modular experiment.To achieve a monolithically integrated AOADC consisting of the proposed SLM and stable optical clock provided by OEOs with the estimated performance, a heterogeneously integrated InP multi-mode laser (MML) as an on-chip OEO source, where inter-modal oscillation and PM-IM convertor rather than relying on Sagnac-loop design, where a non-reciprocal phase shifter (NRPS) is not compatible with Si on-chip integration at the present. RF signal generated from MML typically suffers poor stabilization and 25-fold reduction in timing jitter is measured compared to the free-running case, when SEILDPLL with external optical delays of 5-/15-(mu)s are employed. Moreover, for a fully integrated design rather than modular fiber mandrills, both non-dispersive and dispersive add-drop filter (ADF) resonators are modeled using both full-wave OptiFDTD and proven MATLAB codes on SiN based optical time delays of 975 ns within a chip area of 27 cm2 and 0.1 cm2, respectively. Furthermore, limits of performance improvements using a combined stabilization processes of self-mode-locking (SML) techniques and self-forced SML are investigated. Timing jitter of a 13-mode SML (e.g., fabricated using HHI foundry service) with 700 ns SEIL and 700-/900-ns DSPLL integrated IOEO is estimated to be only 7.6 fs at 10 GHz.
Photonic Analog To Digital Conversion
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Author : Barry L Shoop
language : en
Publisher:
Release Date : 2001-03-27
Photonic Analog To Digital Conversion written by Barry L Shoop and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-03-27 with categories.
Science Abstracts
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Author :
language : en
Publisher:
Release Date : 1993
Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Electrical engineering categories.
Physics Briefs
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Author :
language : en
Publisher:
Release Date : 1993
Physics Briefs written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Physics categories.
Laser Physics At The Limits
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Author : Hartmut Figger
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29
Laser Physics At The Limits written by Hartmut Figger and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.
Published on the occasion of Theodor Hänsch's 60th Birthday emphasis is placed on precision related to results in a variety of fields, such as atomic clocks, frequency standards, and the measurement of physical constants in atomic physics. Furthermore, illustrations and engineering applications of the fundamentals of quantum mechanics are widely covered. It has contributions by Nobel prize winners Norman F. Ramsey, Steven Chu, and Carl E. Wieman.
Ultrafast Photonics
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Author : A. Miller
language : en
Publisher: CRC Press
Release Date : 2019-08-22
Ultrafast Photonics written by A. Miller and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-08-22 with Science categories.
Ultrafast photonics has become an interdisciplinary topic of high international research interest because of the spectacular development of compact and efficient lasers producing optical pulses with durations in the femtosecond time domain. Present day long-haul telecommunications systems are almost entirely based on the transmission of short burst
Photonic Microresonator Research And Applications
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Author : Ioannis Chremmos
language : en
Publisher: Springer
Release Date : 2010-06-09
Photonic Microresonator Research And Applications written by Ioannis Chremmos and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-06-09 with Technology & Engineering categories.
The technology surrounding the design and fabrication of optical microresonators has matured to a point where there is a need for commercialization. Consequently, there is a need for device research involving more advanced architectures and more esoteric operating principles. Photonic Microresonator Research and Applications explores advances in the fabrication process that enable nanometer waveguide separations, exceptionally smooth surfaces essential to reach Q factors in the order of 106- 108 and high index contrast materials.