Applications of Nonlinear Fiber Optics

非线性光纤的应用

• 批准号: RGPIN-2015-06071
• 负责人: Bao, Xiaoyi
• 金额: $ 4.59万
• 依托单位: University of Ottawa
• 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=691159
• 关键词: Applications; Nonlinear; Fiber; Optics

My research focuses on fiber optics technology. We achieve enhanced nonlinear effects in fibers by making structures in the fibers. Then, based on time and frequency features of four wave mixing and stimulated scattering; we develop novel fiber-based devices such as ultra-narrow linewidth filters, low-noise lasers, optical random number generators and entangled fiber laser sources. They offer high precision, compact and cost-effective solutions for metrology, sensors and fiber communications. In quantum communications, a single photon source and detector are often used; therefore, the communication signal is limited by the frequency and phase noise of the optical signal. It is very important to develop a narrow linewidth optical filter (kHz range) and a laser source with ultra-low phase and frequency noise (unavailable commercially) to ensure long-distance quantum communication. The optical entangled source is the key for secure communications. ***For health, environmental and structural safety monitoring, different variables are often inter-related. For example, temperature is a parameter that impacts many others, and it is often impossible to use multiple sensors and their associated wires in the same location due to confined space. Using nonlinear fiber optics, we will also develop high-accuracy sensors, enabled by in-fiber structures with one sensing probe to realize measurements of two to three parameters at once. ******Another important application of nonlinear fiber optics is in the instrumentation of distributed fiber sensors based on nonlinear light scattering in optical fibers. These will allow temperature and strain (static) and acoustic waves (dynamic) to be detected over long distances and large areas. This will be the first time that static and dynamic monitoring will be achieved at the same time and in the same location. Optical fibers can "hear" underwater acoustic waves and identify abnormal sounds in gas, oil and water flow, resulting from pipeline cracks and deformation. By identifying the crack/deformation locations at earlier stages, we can reduce or prevent environmental contamination resulting from leakages in oil, gas or sewage water. Strain and temperature monitoring allows safety and security monitoring of highway bridges, dams, nuclear reactors, tunnels, high-speed railway tracks, critical areas, power generators and fiber communication links; all extremely relevant to Canada as natural resources represent our dominant economic activities. ******In proposed program, we design and develop sensor, laser and instruments, and then work with collaborators in industry and academia to modify the system towards applications. This gives our research the largest impact and provides HQP with an opportunity to build an international network of industrial and academic contacts, which make them well-positioned to make an impact in both industrial R&D and academic research. *** *** *****

我的研究重点是光纤技术。我们通过在纤维中制造结构来实现纤维中的非线性效应。然后，基于四波混合和刺激散射的时间和频率特征；我们开发了基于纤维的新型设备，例如超鼻涕线宽过滤器，低噪声激光器，光随机数发电机和纠缠纤维激光源。它们为计量，传感器和纤维通信提供了高精度，紧凑和具有成本效益的解决方案。在量子通信中，经常使用单个光子源和检测器。因此，通信信号受光信号的频率和相位噪声的限制。开发一个狭窄的线宽光学滤波器（KHz范围）和具有超低相和频率噪声的激光源（商业上不可用）以确保长距离量子通信非常重要。光学纠缠源是安全通信的关键。 ***对于健康，环境和结构安全监控，不同的变量通常相互关联。例如，温度是影响许多其他许多其他传感器的参数，由于限制空间，通常不可能在同一位置使用多个传感器及其相关的电线。使用非线性光纤光学元件，我们还将开发高准确的传感器，并通过带有一个传感器探针的纤维内结构启用，以一次实现两到三个参数的测量。 *****非线性光纤光学元件的另一个重要应用是基于光纤中非线性光散射的分布式光纤传感器的仪器。这些将使温度和应变（静态）和声波（动态）在长距离和大面积上检测到。这将是第一次在同一时间和同一位置实现静态和动态监测。光纤可以“听到”水下声波，并确定由于管道裂纹和变形而导致的气体，油和水流异常的声音。通过识别早期阶段的裂纹/变形位置，我们可以减少或防止因油，燃气或污水泄漏而导致的环境污染。应变和温度监测可以对公路桥梁，大坝，核反应堆，隧道，高速铁路轨道，关键区域，发电机和光纤通信链路进行安全监测；所有与加拿大非常相关，因为自然资源代表了我们主要的经济活动。 *****在拟议的计划中，我们设计和开发人员传感器，激光和仪器，然后与行业和学术界的合作者合作，将系统修改为应用程序。这为我们的研究带来了最大的影响，并为HQP提供了建立国际工业和学术联系网络的机会，这使得它们具有良好的位置，以对工业研发和学术研究产生影响。 ***********