Integrated solutions for optical orbital angular momentum multiplexed transceiver

光轨道角动量复用收发器集成解决方案

• 批准号: 405632792
• 负责人: Professor Dr.-Ing. Dirk Plettemeier
• 金额: --
• 依托单位: Professur für Hochfrequenztechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/405632792?language=en
• 关键词: Integrated; solutions; optical; orbital; angular

The proposed project deals with integrated solutions for optical orbital angular momentum (OAM) multiplexed transceivers. This kind of transmission technology is an attractive way to further enhance the capacity of optical communication systems.During the last decade, the capacity of single optical fiber was increased by exploiting coherent transmission combined with advanced modulation formats (DP-QPSK, QAM) and the transition from the standard DWDM frequency grid to optical superchannels. However, the transmission capacity of standard optical fiber itself tends to be restricted by the nonlinear Shannon limit. To overcome that bottleneck, optical communications based on the Spatial Division Multiplexing (SDM) has attracted significant research interest. Being free to choose the basis of fiber modes working as orthogonal signal carriers for MDM transmission, it is sensible to use the basis of vortex modes. They offer high mode conversion efficiency at the (de)multiplexer compared with the other modal bases.Currently, generation, modulation and detection of optical vortices are provided by bulk optical devices. The effective involvement of OAM-based transmission techniques into industrial applications requires robustness and repeatability, which is difficult to achieve with discrete components. Hence, the development of the compact integrated optical components, capable of on-chip generation, transmission and processing of optical vortices, is the next key step towards robust and energy- and cost-effective OAM-based information systems and to the involvement of this data multiplexing technique to the short-range scenarios. Moreover, the fabrication process of such components should be compatible with the existing lithography and micromachining techniques.In order to provide integrated transmitter and receivers, key components such as the spatial multiplexer / demultiplexer (SMUX) shall be realized as photonic integrated circuit in industrially available manufacturing processes. Electronic-photonic integrated circuits (EPIC) allow the co-integration of these (passive) photonic circuits and high-speed electronics like photodiodes and possibly trans-impedance amplifiers based on SiGe technology. Thus, the main challenge of the proposed work is the effective realization of the devices based on photonic integrated circuits.We propose to develop a transmitter based on integrated OAM emitter and a fully integrated on-chip receiver. The appropriate design approach will be determined in accordance with the analysis of available manufacturing platforms and detailed simulations of possible integrated microstructures. The produced integrated devices will be characterized experimentally to confirm their functionality, defined by the analytical and numerical models. Moreover, system-level experiments with the CW optical signal and the modulated telecommunication signals of different modulation formats will be provided.

提出的项目涉及光轨道角动量（OAM）多路收发器的集成解决方案。这种传输技术是进一步提高光通信系统容量的一种有吸引力的方式。在过去的十年中，通过利用相干传输结合先进的调制格式（DP-QPSK， QAM）和从标准DWDM频率网格到光超级信道的过渡，单光纤的容量得到了增加。然而，标准光纤本身的传输能力往往受到非线性香农极限的限制。为了克服这一瓶颈，基于空分复用（SDM）的光通信引起了人们极大的研究兴趣。由于可以自由选择作为MDM传输正交信号载波的光纤模式基，因此使用旋涡模式基是明智的。与其他模态基相比，它们在（解）多路复用器上提供高模式转换效率。目前，光学涡流的产生、调制和检测都是由大块光学器件提供的。将基于oam的传输技术有效地应用于工业应用需要鲁棒性和可重复性，这在离散元件中很难实现。因此，紧凑型集成光学元件的发展，能够在片上产生，传输和处理光学涡流，是迈向稳健，能源和成本效益高的基于oam的信息系统以及将这种数据多路复用技术应用于短程场景的下一个关键步骤。此外，这些元件的制造工艺应与现有的光刻和微加工技术兼容。为了提供集成的发送和接收，关键部件，如空间多路复用/解路复用器（SMUX）应实现为光子集成电路在工业上可用的制造工艺。电子-光子集成电路（EPIC）允许这些（无源）光子电路和高速电子器件（如光电二极管和可能的基于SiGe技术的跨阻抗放大器）的协整。因此，本文工作的主要挑战是如何有效地实现基于光子集成电路的器件。我们建议开发一种基于集成OAM发射器和完全集成的片上接收器的发射机。适当的设计方法将根据现有制造平台的分析和可能的集成微结构的详细模拟来确定。生产的集成器件将通过实验表征，以确认其功能，由分析和数值模型定义。此外，还将提供连续波光信号和不同调制格式的调制电信信号的系统级实验。