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.

物理学、工程学和医学生物物理学的四名教员与他们的学生和博士后、两家加拿大公司和一家欧洲合作者申请资金，以推动新一代超短脉冲光纤激光器的发展，用于制造和高附加值材料治疗，围绕两个新范例：(1)根据申请，使用“可编程硅”而不是定制设计的分立电子学来整形、控制和稳定非常快(2 GHz)激光脉冲串；以及(2)超高重复频率(2 GHz以上)的“突发模式”激光处理。作为一类，超快脉冲激光现在以具有非常低的附带影响而产生显著的切割而闻名。最近，以非常快的速度(1-100 MHz)连续发射这种脉冲的猝发模式激光器已经被证明是一种新的传输模式--它可以非常精确地控制有意的热积累、材料升华、等离子体介导的烧蚀和材料修改。在过去的一年里，人们发现2 GHz甚至比100兆赫更好。我们的系统将提供一连串高峰值功率，而不需要几千瓦的平均功率，“可编程硅”将使其成为一种自我监控、自我调节的激光器，它将最后输出的脉冲与模板图案进行比较，然后在约30 ns的时间内纠正操作。我们将不需要精确地预测~20,000倍放大器的非线性增益动态。为此，该系统更加稳定和精确，并为不同的传输模式提供了广泛而灵活的选择：从超温和的升华加工到直接写入内部波导结构的非常具体的热控制，从把玻璃切成块到焊接在一起，然后改为写入内部诊断光波导--所有这些都无需任何改装。基础研究是该项目的一部分，该项目旨在为玻璃、晶体、多晶陶瓷、生物医学植入材料、金属和其他材料的不同加工需求建立最佳模式或“脉冲计划”。