Ultra-Wide Bandwidth and High Resolution Photonic Analog to Digital and Digital to Analog Converters

超宽带宽和高分辨率光子模数和数模转换器

• 批准号: 1711446
• 负责人: Nadir Dagli
• 金额: $ 36万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-06-15 至 2022-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1711446&HistoricalAwards=false
• 关键词: Ultra; Wide; Bandwidth; Resolution; Photonic

Title: Ultra-Wide Bandwidth and High Resolution Photonic Analog to Digital and Digital to Analog ConvertersAbstract:Nontechnical: In today's technology driven world digital electronics and digital systems are ubiquitous. Their hardware and software are the essence of everything that touches our lives many times a day. Real life systems generate analog signals which need to be converted into digital form before they can be handled by digital technology. This is done using an Analog to Digital Converter (ADC). Almost all the existing ADCs are electronic. There are many types of ADCs with different resolution and speed. As the resolution of an ADC increases its fidelity improves significantly. Although electronic ADCs provide very high resolution they do not operate very fast. This proposal aims to develop a high speed ADC photonics technology which operates without sacrificing resolution. The same technology is used in fiber optic communication systems, is well understood and its parts are commercially available. However, a few special components need to be developed before the entire ADC can be demonstrated. This project will develop and fabricate such components and demonstrate a proof of concept operation of the ADC. Such high resolution and fast ADC will improve many applications, such as instrumentation, radar, optical fiber communication and wide bandwidth signal distribution. Technical: This proposal introduces a new and novel approach for a photonic ADC that can deliver eight bits of resolution at bandwidths of 20 GHz and higher. The proposed basic ADC resembles very much to a wavelength division multiplexed (WDM) fiber optic digital link without the fiber. It consists of a multi wavelength source, a quantizer, a sampler, a demultiplexer and receivers. The quantizer is a high-speed Mach-Zehnder modulator (MZM) with an intentional path length difference between its arms. The sampling is done after the quantizer. The sampled outputs at different wavelengths generate a code corresponding to the digitized version of the analog signal applied to the quantizer. This basic idea is improved upon using a subranging approach to improve the number of bits while reducing the component count. This requires a digital to analog converter (DAC), which can be made out of a single MZM. The practical operation of such an ADC requires low-voltage and high-speed MZM for quantizer and DAC. The required ultra-low jitter sampling can also be performed using such MZMs. The focus of this proposal is to develop these critical components, namely the quantizer, DAC and the sampler, and make a proof of concept demonstration of a scaled down version of the ADC.

标题：超宽的带宽和高分辨率的光子模拟对数字和数字转换为模拟转换：非技术：在当今技术驱动的世界数字电子和数字系统中，无处不在。他们的硬件和软件是每天多次接触我们生活的一切的本质。现实生活系统会生成模拟信号，这些信号需要转换为数字形式，然后才能通过数字技术处理。这是使用数字转换器（ADC）的类似物完成的。几乎所有现有的ADC都是电子的。有许多类型的ADC具有不同的分辨率和速度。随着解决方案的分辨率，ADC的延长程度大大提高。尽管电子ADC提供了很高的分辨率，但它们的运行速度并不快。该建议旨在开发高速ADC光子技术，该技术在不牺牲解决方案的情况下运行。光纤通信系统中使用了相同的技术，众所周知，其零件在市售。但是，在展示整个ADC之前，需要开发一些特殊的组件。该项目将开发和制造此类组件，并展示ADC的概念操作证明。这种高分辨率和快速ADC将改善许多应用，例如仪器，雷达，光纤通信和宽带宽度信号分布。技术：该提案引入了一种新的新方法，用于一种光子ADC，可以在20 GHz及更高​​的带宽下提供八位分辨率。所提出的基本ADC非常类似于波长多路复用（WDM）的光纤数字链路，而没有光纤。它由一个多波长源，量化器，采样器，反复体和接收器组成。量化器是高速马赫德调制器（MZM），其手臂之间有故意的路径长度差。采样是在量化后完成的。在不同波长处的采样输出生成了与应用于量化器的模拟信号的数字化版本相对应的代码。使用子主机方法来改善位置的数量，同时减少组件计数时，就可以改善此基本思想。这需要一个数字到模拟转换器（DAC），可以用单个MZM制成。这样的ADC的实际操作需要低压和高速MZM才能进行Quantizer和DAC。也可以使用此类MZM进行所需的超低抖动采样。 该提案的重点是开发这些关键组件，即量化器，DAC和采样器，并为ADC的缩小版本提供概念证明。