Photonic Analog To Digital Conversion

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Photonic Analog To Digital Conversion

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Author : Barry L. Shoop
language : en
Publisher: Springer
Release Date : 2012-11-02

Photonic Analog To Digital Conversion written by Barry L. Shoop and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-02 with Technology & Engineering categories.

Provides a comprehensive look at the application of photonic approaches to the problem of analog-to-digital conversion. It looks into the progress made to date, discusses present research, and presents a glimpse of potential future technologies.

Photonic Analog To Digital Conversion Using A Robust Symmetrical Number System

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Author :
language : en
Publisher:
Release Date : 2005

Photonic Analog To Digital Conversion Using A Robust Symmetrical Number System written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

A photonic analog-to-digital converter (ADC) based on a robust symmetrical number system (RSNS) was constructed and tested. The analog signal to be converted is used to amplitude modulate an optical pulse from a laser using three Mach-Zehnder interferometers (MZI). The Mach-Zehnder interferometers fold the input analog signal for a three-channel RSNS encoding. The folding waveforms are then detected and amplitude-analyzed by three separate comparator banks, the outputs of which are used to determine a digital representation of the analog signal. This design uses the RSNS preprocessing to encode the signal with the fewest number of comparators for any selected bit resolution. In addition to the efficiency of its use of comparators, the RSNS encoding has inherent Gray-code properties making it particularly attractive for eliminating any possible encoding errors. The RSNS encoding is combined with an optical infrastructure that offers high bandwidth and low insertion loss characteristics. A full implementation was constructed and tested. The lack of a high-speed data acquisition device limited the results to examining the preprocessing and digital processing separately. With the system integration of a data acquisition device, a wideband direct digital antenna architecture can be demonstrated.

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.

Integrated Photonic Analog To Digital Converters

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Author : Anatol M. Khilo
language : en
Publisher:
Release Date : 2011

Integrated Photonic Analog To Digital Converters written by Anatol M. Khilo and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.

Accurate conversion of wideband multi-GHz analog signals into the digital domain has long been a target of analog-to-digital converter (ADC) developers, driven by applications in radar systems, software radio, medical imaging, and communication systems. Aperture jitter has been a major bottleneck on the way towards higher speeds and better accuracy. Photonic ADCs, which perform sampling using ultra-stable optical pulse trains generated by mode-locked lasers, have been investigated as a promising approach to overcome the jitter problem and bring ADC performance to new levels. This work demonstrates that the photonic approach can deliver on its promise by digitizing a 41 GHz signal with 7.0 effective bits and 52 dBc spur-free dynamic range (SFDR) using a discrete-component photonic ADC. This corresponds to 15 fs jitter, a 4-5 times improvement over the jitter of the best electronic ADCs, and an order of magnitude improvement over the jitter of electronic ADCs operating above 10 GHz. The feasibility of a practical photonic ADC is demonstrated by creating an integrated ADC with a modulator, filters, and photodetectors fabricated on a single silicon chip and using it to sample a 10 GHz signal with 3.5 effective bits and 39 dBc SFDR. In both experiments, a sample rate of 2.1 GSa/s was obtained by interleaving two 1.05 GSa/s channels; higher sample rates can be achieved by increasing the channel count. A key component of a multi-channel ADC - a dual multi-channel high-performance filter bank - is successfully implemented. A concept for broadband linearization of the silicon modulator, which is another critical component of the photonic ADC, is proposed. Nonlinear phenomena in silicon microring filters and their impact on ADC performance are analyzed, and methods to reduce this impact are proposed. The results presented in the thesis suggest that a practical integrated photonic ADC, which successfully overcomes the electronic jitter bottleneck, is possible today.

Application Of Wavelength Division Sampling In Photonic Analog To Digital Conversion

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Author : Bhushan Shanti Asuri
language : en
Publisher:
Release Date : 1998

Application Of Wavelength Division Sampling In Photonic Analog To Digital Conversion written by Bhushan Shanti Asuri and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.

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.

Photonic Analog To Digital Conversion

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Author : Johan Stigwall
language : en
Publisher:
Release Date : 2004

Photonic Analog To Digital Conversion written by Johan Stigwall and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.

System Demonstration Of An Optically Sampled Wavelength Demultiplexed Photonic Analog To Digital Converter

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Author : Michael Yung Peng
language : en
Publisher:
Release Date : 2011

System Demonstration Of An Optically Sampled Wavelength Demultiplexed Photonic Analog To Digital Converter written by Michael Yung Peng and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.

The performance of electronic analog-to-digital converters (ADCs) at high sampling rates is fundamentally limited by the timing jitter of electronic clocks. To circumvent this limitation, one method is to exploit the orders-of-magnitude lower timing jitter of mode-locked lasers and implement optical sampling as a front-end for electronic ADCs. The optical-sampling, wavelength-demultiplexing approach to A/D conversion, which is explored in this thesis, offers key benefits such as ease of scalability to higher aggregate sampling rates via passive wavelength-division demultiplexing (WDM) filters and potential for full integration via silicon photonics platform for chip-scale signal processing applications. This thesis will first cover the design issues for each stage in the optically-sampled, wavelength-demultiplexed photonic ADC architecture, followed by experimental results from two system demonstrations. Digitization of a 41-GHz signal with 7.0 effective bits at a sampling rate of 2 GSa/s was demonstrated with a discrete-component photonic ADC, which corresponds to 15 fs of jitter, a 4-5 times improvement over state-of-the-art electronic ADCs. On the way towards an integrated photonic ADC, a silicon chip with core photonic components was fabricated and used to digitize a 10-GHz signal with 3.5 effective bits. Drop-port transmission measurements of an integrated 20-channel WDM filter bank are included to show potential for high sampling rate operation with 10 effective bits.

Photonic Sampling And Analog To Digital Conversion Laser Physics

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Author : Phillip E. Pace
language : en
Publisher:
Release Date : 2008-02

Photonic Sampling And Analog To Digital Conversion Laser Physics written by Phillip E. Pace and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-02 with categories.

Illustrated with color diagrams, this reference deals with laser configurations, stabilization, performance measurements, and other topics. (Technology & Industrial Arts)

Photonic Time Stretched Analog To Digital Conversion

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Author : Yan Han
language : en
Publisher:
Release Date : 2004

Photonic Time Stretched Analog To Digital Conversion written by Yan Han and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.