Frequency-Agile source of remote optical (UV-THz) emission (market assessment)

远程光学 (UV-THz) 发射的频率捷变源（市场评估）

• 批准号: 516236-2017
• 负责人: Kieffer, JeanClaude
• 金额: $ 0.88万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Idea to Innovation
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=618896
• 关键词: Frequency; Agile; source; remote; optical

The present proposal concerns a market assessment related to the development of a source of frequency agileradiation (from UV to THz) obtained by using multi-color filamentation in an in-line setup and by spectrallyshaping a femtosecond laser beam. High power frequency agile sources of optical radiation (from the visible tothe THz) are not technologically mature due to complexity and cost. The current approach in non-linear opticalinteraction and generation of radiation at some controlled distance is based on splitting a laser beam in severalbeams, changing the frequency of some of these beams and recombining the various beams. Precise alignment,system complexity and high stability of the multi-beam system are critical and difficult to control, which limitsthe practical use in a real environment. We developed a novel approach which circumvents the currentlimitations offering a way to spatially and temporally overlap two-color pulses or multi color pulses in acompletely collinear geometry for the generation at long distance of tunable UV, VIS, IR and/or THz sourcevia nonlinear optical interaction or photocurrent generation processes. The system developed and tested allowsan easy generation of frequency-agile radiation through programmable control of the laser spectral amplitudeand phase. The optical source can be generated on a range of distances (100m - km) from a single laser beammodulated into collinear multi-pulses of different wavelengths, with a controlled temporal delay between thepulses, which are combined at a controlled distance in a multiple-color filament. The system ensures acomplete insensibility to alignments, vibrations and turbulences on long distances propagation particularly inair. The number of optical components in the present device is reduced offering a robust and compact way togenerate remote radiation with perfectly controlled parameters for remote sensing or spectroscopy. The stableand programmable generation of tunable Infra-red emission in the range between 2µm and 12µm and THzradiation in the 2THz to 6THz range has been demonstrated at long distances.

本提案涉及与开发频率捷变辐射源(从紫外线到太赫兹)有关的市场评估，这种辐射源是通过在串联装置中使用多色灯丝并通过对飞秒激光光束进行光谱整形获得的。高功率频率捷变光辐射源(从可见光到太赫兹)由于复杂性和成本的原因，在技术上还不成熟。目前的非线性光学相互作用和在一定控制距离处产生辐射的方法是基于将激光光束分成几束，改变其中一些光束的频率，并将各种光束重新组合。多波束系统的精确对准、系统复杂性和高稳定性是关键和难以控制的问题，限制了其在实际环境中的实际应用。我们开发了一种新的方法，它克服了电流的限制，提供了一种在完全共线的几何结构中在空间和时间上重叠双色或多色脉冲的方法，用于远距离产生可调谐的UV、VIS、IR和/或THz源的非线性光学相互作用或光电流产生过程。该系统开发和测试了通过可编程控制激光光谱幅度和相位轻松产生频率捷变辐射。光源可以在距离单个激光器的距离范围(100米-公里)上产生，所述单个激光器被光束调制成不同波长的共线多个脉冲，所述脉冲之间具有受控的时间延迟，所述脉冲在受控距离处组合成多色灯丝。该系统确保对长距离传播的对准、振动和湍流完全不敏感，特别是在空气中。该装置减少了光学元件的数量，提供了一种强大而紧凑的方式来产生远程辐射，并为遥感或光谱分析提供了完美控制的参数。已证明在远距离范围内可稳定和可编程地产生2微米到12微米范围内的可调红外线发射和2太赫兹到6太赫兹范围内的THZ辐射。