Range Resolved Laser Doppler Velocimetry Using a cw Laser Source and Pseudo Random Code Modulation for Range Resolution

使用连续激光源和伪随机码调制实现距离分辨率的距离分辨激光多普勒测速

• 批准号: 9115203
• 负责人: J. Fred Holmes
• 金额: --
• 依托单位: Oregon Graduate Institute of Science & Technology
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-15 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115203&HistoricalAwards=false
• 关键词: Range; Resolved; Laser; Doppler; Velocimetry

An innovative new technique for laser doppler velocimetry will be investigated that uses a continuous wave (cw) source. The use of a cw rather than the conventional pulsed laser should result in a light, compact, rugged and more reliable LDV system suitable for use in both spacecraft and aircraft. In addition, the use of multiple cw beams and complimentary pseudo random codes should allow the vector wind to be measured without scanning the beams. Potential applications are global remote sensing of atmospheric winds, wind shear and turbulence detection and primary air instrumentation. In order to obtain range resolved wind and develop the required signal to noise ratio, pseudo random, diphase modulation of the laser and a novel detection scheme will be used. The work is primarily experimental with the goal of demonstrating feasibility of this new, innovative method. An experimental system will be built and evaluated by making range resolved wind measurements in the atmosphere.

将研究一种使用连续波源的激光多谱勒测速新技术。使用连续波而不是传统的脉冲激光应该会产生一种轻便、紧凑、坚固耐用和更可靠的激光雷达系统，适用于航天器和飞机。此外，使用多个CW波束和互补的伪随机码应该可以在不扫描波束的情况下测量矢量风。潜在的应用是全球大气风遥感、风切变和湍流探测以及初级空气仪器。为了获得距离分辨的风和发展所需的信噪比，将使用伪随机、激光的双相调制和一种新的检测方案。这项工作主要是试验性的，目的是证明这种新的、创新的方法的可行性。将建立一个实验系统，并通过在大气中进行距离分辨风测量来进行评估。