Pulse Measurement Techniques for Fiber Optics

光纤脉冲测量技术

• 批准号: 1609808
• 负责人: Rick Trebino
• 金额: $ 37万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-07-15 至 2020-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1609808&HistoricalAwards=false
• 关键词: Pulse; Measurement; Techniques; Fiber; Optics

Title: Two New Laser Pulse-Measurement Techniques for Fiber Optics: Measuring Ultraweak Ultrashort Pulses and Spatio-Temporally Complex Multi-Spatial-Mode PulsesNon-Technical Description: This project will involve developing two laser pulse-measurement techniques to solve two important unsolved problems in fiber optics and fiber lasers. The first will solve the long-standing problem of the development of an ultrasensitive pulse-measurement technique for very low-energy and relatively long laser pulses-pulses with very low intensities. Such pulses occur in essentially all telecommunications environments, but also in many other fields. The second measurement technique is for the fiber-mode-dispersion problem: different spatial modes propagate at different velocities in a fiber and so require a complete spatiotemporal light-measurement technique. The proposed technique simultaneously generates many different-color holograms on a single camera frame and will also be simple, fast, and convenient.Technical Description: Current pulse-measurement techniques must use a thin nonlinear-optical crystal, whose output scales as the square of the intensity and crystal thickness and so yields a weak output beam. The first proposed technique will instead use a very thick nonlinear-optical crystal, much longer than is possible in other techniques, in a novel manner to yield much higher efficiency. This crystal also simultaneously spectrally resolves the generated pulse. Collinear, orthogonally polarized beams and a Type II crystal will also be required. The second proposed technique generates multiple holograms simultaneously, one for each wavelength in the pulse. Because a hologram using single-wavelength light can yield the complete spatial electric field of a beam, generating many holograms, one for each wavelength, coupled with a complete measurement of the reference pulse, yields the complete spatio-spectral and spatio-temporal electric field of even complex multi-mode light. Even better, it can do so using only a single camera frame. Additional frames using additional delays between the unknown and reference pulses can extend the range to arbitrarily large delays and numbers of modes. Both techniques will be very inexpensive, compact, experimentally simple to build and use, and easily constructed from off-the-shelf components.

标题：针对光纤的两种新的激光脉冲测量技术：测量超视脉冲和时空复杂的多空间模式脉冲脉冲脉冲脉冲技术描述：该项目将涉及开发两种激光脉冲脉冲测量技术，以在光纤上解决两种重要的未解决问题，以解决光纤和光纤纤维和纤维laseerser。第一个将解决长期存在的超敏脉冲测量技术的问题，用于非常低的能力和相对较长的激光脉冲脉冲，强度非常低。这种脉冲基本上发生在所有电信环境中，但也出现在许多其他领域。 第二个测量技术是针对纤维模式分散问题的：不同的空间模式在光纤的不同速度下传播，因此需要完整的时空光测量技术。所提出的技术同时在单个相机框架上生成许多不同的全息图，也将是简单，快速和方便的。技术描述：当前的脉冲测量技术必须使用薄的非线性光晶体，其输出尺度是其强度和晶体的平方尺度，因此产生了弱输出光束。相反，第一个提出的技术将使用非常厚的非线性光学晶体，比其他技术的新技术要长得多，以新颖的方式产生更高的效率。该晶体还同时分辨出生成的脉冲。还需要共线性，正交极化的光束和II型晶体。第二种提出的技术同时生成多个全息图，一个用于脉冲中的每个波长。因为使用单波长光的全息图可以产生梁的完整空间电场，产生许多全息图，每个波长一个，并与参考脉冲的完整测量，可产生完整的时空光谱和时空 - 周期性和时空电场，甚至复杂的多模式光。更好的是，它只能使用单个相机框架来做到这一点。使用未知脉冲和参考脉冲之间的其他延迟的其他帧可以将范围扩展到任意较大的延迟和模式数量。这两种技术都将非常便宜，紧凑，实验性地构建和使用，并且可以轻松地从现成的组件中构建。