Differential Absorption LIDAR Imaging

差分吸收激光雷达成像

• 批准号: 131349
• 金额: $ 3.13万
• 依托单位: M-SQUARED LASERS LIMITED
• 依托单位国家: 英国
• 项目类别: Feasibility Studies
• 财政年份: 2013
• 资助国家: 英国
• 起止时间: 2013 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=131349
• 关键词: Differential; Absorption; LIDAR; Imaging

Laser based measurements are increasing being used to extract gas parameters including concentration. If the target gas is present it will absorb laser power, this absorption is proportionally to the concentration of the gas. As well as measuring absorption, range to gas can also be measured by examining the time it takes for the laser pulses to travel, this is known as light detection and ranging (LIDAR). This can be extended by having two laser sources operating at closely spaced wavelengths, one wavelength is highly absorbent to the target gas the other is not. By comparing the detected values for both wavelengths the concentration can be determined, this is known as differential absorption LIDAR (DIAL). This work will develop a bench mounted DIAL system for gas concentration and range measurements.

基于激光的测量越来越多地用于提取包括浓度在内的气体参数。如果存在目标气体，它将吸收激光功率，这种吸收与气体浓度成正比。除了测量吸收之外，还可以通过检查激光脉冲传播所需的时间来测量气体距离，这称为光检测和测距 (LIDAR)。这可以通过让两个以紧密间隔的波长运行的激光源来扩展，一个波长对目标气体具有高度吸收性，而另一个则不然。通过比较两个波长的检测值，可以确定浓度，这称为差分吸收激光雷达 (DIAL)。这项工作将开发一个用于气体浓度和范围测量的台式 DIAL 系统。