Nonlinear effects in photonic devices and systems

光子器件和系统中的非线性效应

• 批准号: RGPIN-2016-06579
• 负责人: Kumar, Shiva
• 金额: $ 2.99万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=688322
• 关键词: Nonlinear; effects; photonic; devices; systems

Nonlinear effects in photonic devices play an important role in the design of fiber optic networks, imaging systems and microcavites. In applications such as fiber optic networks, these effects are detrimental whereas they can be beneficial in imaging systems and microcavities. This proposal develops techniques to mitigate them when they cause problems and to enhance them when they provide benefits. ***A fiber-optic network forms the backbone of the internet and as demand for video services grows, the capacity of this network must increase. Successful mitigation of the linear effects using the equalizers, transmission speeds have increased from several Mb/s to hundreds of Tb/s. Now the fundamental impediments to increases in capacity and reach that will be required to satisfy the future demands are those generated by nonlinear effects. In this proposal, digital and optical techniques will be developed to mitigate these effects in single mode and few mode fibers. We will also explore the possibility of constructing multiple-input multiple-output systems with inexpensive light sources and direct detection receivers. The subscribers have the potential to greatly reduce the cost per bit of fiber optic networks.***Nonlinear imaging techniques are used for identification of molecules in biomedical applications. When a pump wave and a Stokes wave are incident on a sample, the degree of amplification of the Stokes wave provides the fingerprint by which the molecule can be identified. Typically, direct detection receivers are used in imaging systems which do not have information on the phase. We propose to combine the nonlinear imaging with coherent technology so that the phase of optical signal is available at the receiver. This enables construction of a 3-D vibrational image of a molecule. Coherent detection enables the back propagation techniques akin to those developed for fiber optic systems. These techniques have the potential to remove unwanted background and improve the quality of the image. ***Optical microcavities have been used for Raman lasers and sensing applications. In this proposal, we will investigate the nonlinear effects on optical modes in microcavity. The microcavity supports acoustic modes and the study of acousto-optic interaction in microcavity could lead to interesting new applications, such as acoustic lasers. We will explore the possibility of constructing ultralow threshold Raman lasers and acoustic lasers by optimizing the device geometry. ***As suggested by some of the proponent's previous/existing interactions with industrial partners, Canadian companies in the communications, sensing and biomedical fields could benefit from the techniques developed in this program. Furthermore, the students trained in the program will develop highly transferable skills that will be of interest not only to companies that are active in these fields, but other high technology companies, too.**

光子器件中的非线性效应在光纤网络、成像系统和微腔的设计中发挥着重要作用。在光纤网络等应用中，这些影响是有害的，但它们在成像系统和微腔中可能是有益的。该提案开发了一些技术，当它们引起问题时可以减轻它们，当它们带来好处时可以增强它们。 ***光纤网络构成了互联网的主干，随着视频服务需求的增长，该网络的容量必须增加。使用均衡器成功缓解线性效应，传输速度从几 Mb/s 提高到数百 Tb/s。现在，满足未来需求所需的容量和覆盖范围的增加的根本障碍是非线性效应产生的障碍。在该提案中，将开发数字和光学技术来减轻单模和少模光纤中的这些影响。我们还将探索用廉价光源和直接检测接收器构建多输入多输出系统的可能性。订户有可能大大降低光纤网络的每比特成本。***非线性成像技术用于生物医学应用中的分子识别。当泵浦波和斯托克斯波入射到样品上时，斯托克斯波的放大程度提供了可以识别分子的指纹。 通常，直接检测接收器用于没有相位信息的成像系统。我们建议将非线性成像与相干技术相结合，以便在接收器处获得光信号的相位。这使得能够构建分子的 3D 振动图像。相干检测使反向传播技术类似于为光纤系统开发的技术。这些技术有可能去除不需要的背景并提高图像质量。 ***光学微腔已用于拉曼激光器和传感应用。在本提案中，我们将研究微腔中光学模式的非线性效应。微腔支持声学模式，对微腔中声光相互作用的研究可能会带来有趣的新应用，例如声学激光器。我们将探索通过优化器件几何结构构建超低阈值拉曼激光器和声学激光器的可能性。 ***正如一些支持者以前/现有与工业合作伙伴的互动所建议的那样，通信、传感和生物医学领域的加拿大公司可以从该计划中开发的技术中受益。此外，接受该计划培训的学生将培养高度可转移的技能，这些技能不仅会引起活跃在这些领域的公司的兴趣，而且也会引起其他高科技公司的兴趣。 **