Lithium Niobate on Insulator integrated photonics

铌酸锂（LN）为光通信革命做出了贡献。近年来，市场上推出的绝缘体上铌酸锂（LNOI）重新点燃了人们对这种材料的兴趣。这种集成光子学的新范式开辟了全新的片上光子学应用，并在理论性能方面设定了新的上限。到目前为止，已经证明了几种原理器件：CMOS兼容调制器，单光子发射器，高效的非线性片上器件。然而，高复杂性系统和系统集成仍然缺失。该项目的研究目标是开发和演示基于新型绝缘体铌酸锂（LNOI）平台的多功能集成光子系统。该项目的目标是研究可扩展的LNOI和LNOI混合集成光子平台，以展示新型集成光子系统。该平台将用于展示具有超越最先进性能的光子集成电路。用于短距离和长距离通信的收发器，用于非线性光学的集成系统，量子和测距应用将是主要目标。通信系统将主要利用LN的高电光系数。作为该项目的主要目标和演示者，发射机的目标是调制速度> 100 GHz，这超出了当今任何其他可扩展技术的范围。这些相同的系统将集成相干光源（克尔梳发生器），其将提供待调制的光信号。此外，根据项目的发展和学生的愿景，可以考虑其他原理证明系统。例如量子集成电路、激光雷达和测距系统。它们将利用LN（x（2））的高效非线性转换及其大的透明窗口（对中红外可见）。

Lithium Niobate (LN) contributed to the optical communications revolution. In recent years the introduction on the market of Lithium Niobate on Insulator (LNOI) reignited the interest in this material. This new paradigm for integrated photonics opens up entirely new on-chip photonics applications and sets new upper limits in term of theoretical performance. Several proofs of principle devices have been demonstrated as of today: CMOS compatible modulators, single-photon emitters, efficient non-linear devise on-chip. Still, high complexity systems and system integration are missing. The research objectives of the project are the development and demonstration of multi-features integrated photonics systems based on the novel Lithium Niobate on Insulator (LNOI) platform. This project targets the investigation of scalable LNOI and LNOI hybrids integrated photonics platforms as a mean to demonstrated novel integrated photonics systems. The platform will be used to demonstrate a photonic integrated circuit with performance beyond state of the art. Transceivers for short reach and long-haul communications, integrated systems for non-linear optics, quantum and ranging applications will be the main aims. Communication systems will mainly leverage the high electro-optic coefficient of the LN. As a primary objective and demonstrator of the project, transmitters will aim at a modulation speed >100GHz, which is beyond what any other scalable technology can offer today. These same systems will integrate coherent light sources (Kerr-comb generators), which will provide the optical signal to be modulated. Further, depending on the evolution of the project and the vision of the student, other proof-of-principle systems can be contemplated. Examples of these are quantum integrated circuits, LIDAR and ranging systems. They will leverage the high-efficiency non-linear conversion of LN (x(2)) and its large transparency window (visible to MID-IR).