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35fs-ultrafast-laser with high pulse energy

35fs 超快激光，高脉冲能量

基本信息

批准号：
447787880
负责人：
金额：
--
依托单位：
Friedrich-Alexander-Universität Erlangen-Nürnberg
依托单位国家：
德国
项目类别：
Major Research Instrumentation
财政年份：
2020
资助国家：
德国
起止时间：
2019-12-31 至无数据
项目状态：
未结题

来源：
https://gepris.dfg.de/gepris/projekt/447787880?language=en
关键词：
35fs ultrafast laser pulse energy

项目摘要

Ultrafast lasers can reach very high intensities due to their short pulse length which lead to a non-linear interaction of light with matter. The resulting effects give insight into fundamental physical processes and can be used for novel methods in material processing.The laser-system has, as a result of the very short pulse length, a broad spectral bandwidth in comparison to continuous-wave lasers. This bandwidth can be used as an additional degree-of-freedom to shape the pulse in space and time and therefore also influence the interaction. Thus this opens the possibility to investigate fundamental physical processes. These will be transferred to production technologies to achieve a better quality of laser processes, to increase efficiency, and to open new fields of applications.The high pulse energy enables investigating effects under extreme conditions and to transfer results to large scale production methods. Based on the high pulse energies, filaments in air can be ignited which act as controllable electrical conductors. These can be for example used for remote electrical discharge machining. Thus, ultrashort-pulse processes, which traditionally find application in microscale machining, can be transferred to large-scale macro material processing. Besides material processing, such a laser system offers applications in medicine to exemplarily identify tissue in-vivo fast and precise while being minimal invasive.

超快激光由于其短脉冲长度导致光与物质的非线性相互作用，可以达到非常高的强度。由此产生的影响，深入了解基本的物理过程，并可用于材料加工的新方法。由于脉冲长度非常短，与连续波激光器相比，激光系统具有宽的光谱带宽。这个带宽可以用作额外的自由度来在空间和时间上塑造脉冲，从而也影响相互作用。因此，这开启了研究基本物理过程的可能性。这些将转移到生产技术，以实现更好的激光加工质量，提高效率，并开辟新的应用领域。高脉冲能量可以在极端条件下研究效果，并将结果转移到大规模生产方法中。利用高脉冲能量，可以点燃空气中的细丝，使其成为可控的导电体。例如，这些可以用于远程电火花加工。因此，传统上应用于微尺度加工的超短脉冲工艺可以转移到大规模的宏观材料加工中。除了材料处理之外，这种激光系统在医学上也有应用，例如在微创的情况下快速、精确地识别体内组织。