Multi-GHz 'Smart' Burst-mode ultrafast-laser processing of microfluidic structures, biological/medical materials and difficult industrial materials

微流体结构、生物/医学材料和困难工业材料的多 GHz“智能”突发模式超快激光加工

• 批准号: 494025-2016
• 负责人: Marjoribanks, Robin
• 金额: $ 16.38万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 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=642027
• 关键词: Multi; GHz; Smart; Burst; mode

Four faculty members in Physics, Engineering and Medical Biophysics, together with their students and postdocs, two Canadian companies and a European collaborator, request funding to advance a new generation of intense ultrashort-pulse fibre-laser for manufacturing and high value-added materials treatment, built around two new paradigms: (1) the use of "programmable silicon" instead of custom-designed discrete electronics for shaping, control and stabilization of very fast (2 GHz) laser pulsetrains, according to the application; and (2) 'burst-mode' laser processing at ultra-high repetition rates, above 2 GHz.Ultrafast-pulse lasers, as a class, are now well-known to make remarkable cuts with very low collateral impact. More recently, burst-mode lasers, delivering such pulses in very rapid succession (1-100 MHz) have been shown as a new mode of delivery -- one which gives very precise control of intentional heat accumulation, material sublimation, plasma-mediated ablation, and material modification. In the last year has come the discovery that >2 GHz is even better still than 100 MHz.Our system will deliver trains of high peak power without requiring multi-kilowatt average power, and "programmable silicon" will make it a self-monitoring, self-regulating laser which compares its last output pulse to a template pattern, then corrects operations in ~30ns real time. We'll bypass the need to precisely predict the nonlinear gain dynamics of the ~20,000x amplifier. For this, this system is far more stable and precise, and offers a huge and flexible range of options for different modes of delivery: from ultra-gentle sublimation machining to very specific control of heat for direct-writing internal waveguide structures, from dicing glass in pieces to welding it together, and then changing to writing internal diagnostic optical waveguides -- all without any retooling. Foundational research is one part of the project, to establish optimal patterns, or 'pulse plans', for different needs of processing glasses, crystals, polycrystalline ceramics, biomedical implant materials, metals and others.

Four faculty members in Physics, Engineering and Medical Biophysics, together with their students and postdocs, two Canadian companies and a European collaborator, request funding to advance a new generation of intense ultrashort-pulse fibre-laser for manufacturing and high value-added materials treatment, built around two new paradigms: (1) the use of "programmable silicon" instead of custom-designed discrete electronics for shaping, control and根据应用，非常快（2 GHz）激光脉冲线的稳定； （2）以高于2 GHz的超高重复速率的“爆发模式”激光处理，如今，欧洲裔 - 脉冲激光器作为一类，现在已经众所周知，可以在侧支撞击非常低的情况下进行显着削减。最近，爆发模式激光器以非常快速的继承（1-100 MHz）传递此类脉冲是一种新的传递方式 - 它可以非常精确地控制故意堆积，材料升华，等离子体介导的消融和材料修饰。在过去的一年中，发现> 2 GHz甚至比100 MHz好。我们的系统将提供高峰值功率的火车而无需多千瓦的平均功率，而“可编程硅”将使它成为一种自我监控，自我调节的激光器，将其最后的输出脉冲与模板模式进行比较，然后纠正在〜30ns实时的操作。我们将绕过需要准确预测约20,000倍放大器的非线性增益动力学的需求。为此，该系统更加稳定和精确，并为不同的交付方式提供了巨大而灵活的选项：从超高升华的加工到非常具体的热控制热的内部波导指导结构，从碎片中的滴定玻璃到将其焊接在一起，然后将其焊接在一起，然后更改到编写内部诊断波导，而无需进行任何重新处理。基础研究是该项目的一部分，以建立最佳模式或“脉冲计划”，以处理玻璃，晶体，多晶陶瓷，生物医学植入物材料，金属等的不同需求。