Ultra-Broadband Waveform Generation Using Actively Stabilized Hybrid Photonic-Electronic Circuits - Phase 2

使用主动稳定混合光子电子电路生成超宽带波形 - 第 2 阶段

• 批准号: 403187440
• 负责人: Professor Dr.-Ing. Christian Koos
• 金额: --
• 依托单位: Institut für Photonik und Quantenelektronik (IPQ)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/403187440?language=en
• 关键词: Ultra; Broadband; Waveform; Generation; Using

GOSPEL-2 aims at exploring, implementation and demonstrating a novel concept for generation of ultra-broadband arbitrary waveforms in the optical or the THz frequency range, thus overcoming the limitations of current digital-to-analogue converters (DAC). The concept allows for massive spectral parallelization of conventional DAC interfaces by phase-correct interleaving of optical waveforms that are modulated onto the tones of an optical frequency comb. Building upon newly conceived schemes from the first funding period, we now aim at demonstrating waveform generation with an overall bandwidth of more than 300 GHz and at realizing an integrated signal generator that combines advanced photonic integrated circuits with RF electronics in a chip-scale module. The main conceptual challenge of optical arbitrary waveform generation (OAWG) systems is the phase control required for precise coherent combination of different tributary signals. In the first phase of the project, we conceived a novel concept to realize this phase control and successfully demonstrated the synthesis of a 200 GHz-wide optical waveform from two tributary signals. In the next funding period, we now wish to expand on this idea and utilize it to implement an integrated signal-generator module. This will require advanced photonic integrated circuits that are seamlessly connected to RF driver circuitry through newly developed dense broadband RF interfaces. At the same time, we will increase the number of signal tributaries from two to four, offering an overall bandwidth in excess of 300 GHz. Within the project, we shall develop an advanced model to quantitatively predict the performance of our system, design and implement the underling photonic integrated circuits and RF structures, implement a hybrid integrated photonic-electronic signal generator engine, and experimentally demonstrate the viability of the scheme for generation of ultra-broadband optical waveforms. We will further explore down-conversion of the optical waveforms to the THz frequency range through ultra-fast uni-traveling-carrier (UTC) photodiodes in the framework of a collaboration with an internationally leading group in this area. Based on an experimentally verified quantitative model of our system, we shall finally analyze the bandwidth-scalability of our scheme and evaluate the potential of synthesizing waveforms with THz bandwidths. We expect that the contents of GOSPEL-2 will be of high relevance both for the field of ultra-broadband photonic-electronic waveform synthesis and for the field of optical communications, where grid-less software-defined optical transmitters might allow for dynamic bandwidth allocation.

GOSPEL-2旨在探索、实施和演示一种在光学或太赫兹频率范围内产生超宽带任意波形的新概念，从而克服当前数模转换器（DAC）的局限性。该概念允许通过调制到光频梳的音调上的光波形的相位校正交织来实现传统DAC接口的大规模频谱并行化。我们现在的目标是演示具有超过300 GHz的总带宽的波形生成，并实现集成信号发生器，该集成信号发生器结合了先进的光子集成芯片级模块中的RF电子电路。光学任意波形产生（OAWG）系统的主要概念挑战是不同支路信号精确相干组合所需的相位控制。在项目的第一阶段，我们构思了一个新的概念来实现这种相位控制，并成功地演示了从两个支路信号合成200 GHz宽的光波形。在下一个资助期，我们现在希望扩展这一想法，并利用它来实现一个集成的信号发生器模块。这将需要先进的光子集成电路，通过新开发的密集宽带RF接口无缝连接到RF驱动器电路。与此同时，我们将把信号支路的数量从两个增加到四个，提供超过300 GHz的总带宽。在该项目中，我们将开发一个先进的模型来定量预测我们的系统的性能，设计和实现底层的光子集成电路和RF结构，实现一个混合集成的光电信号发生器引擎，并通过实验证明该方案的可行性产生超宽带光波形。我们将在与该领域国际领先小组合作的框架内，通过超快单行进载波（UTC）光电二极管进一步探索将光学波形下转换到THz频率范围。基于实验验证的定量模型，我们的系统，我们将最终分析我们的计划的带宽可扩展性和评估的潜力，合成波形的太赫兹带宽。我们预计GOSPEL-2的内容将与超宽带光电波形合成领域和光通信领域高度相关，其中无网格软件定义的光发射机可能允许动态带宽分配。