公开(公告)号：US20060153254A1

公开(公告)日：2006-07-13

申请号：US11328462

申请日：2006-01-10

申请人： Kresimir Franjic ,  Darren Kraemer ,  Michael Cowan ,  Renzhong Hua ,  R.J. Miller

发明人： Kresimir Franjic ,  Darren Kraemer ,  Michael Cowan ,  Renzhong Hua ,  R.J. Miller

IPC分类号： H01S3/13

CPC分类号： G02F1/39 ,  A61B18/20 ,  A61C1/0046 ,  A61N2005/0659 ,  B23K26/0624 ,  B23K26/38 ,  B23K2103/32 ,  B23K2103/50 ,  G02F1/3534 ,  G02F2201/16 ,  G02F2203/11 ,  H01S3/0092 ,  H01S3/2383

摘要： A laser system capable of efficient production of high energy sub-nanosecond pulses in the 2-15 μm spectral region is disclosed. Diode pumped solid state lasers are used as pump sources. The system design is simple, reliable and compact allowing for easy integration. The laser system includes a combination of compact solid-state ˜1 micron laser sources, producing high power picosecond pulses, with optical parametric amplification and a quasi-continuous wave laser for seeding the amplification process that enables the efficient conversion of the high power ˜1 micron laser radiation to tuneable mid-infrared sub-ns pulses. New parametric processes are presented for achieving high gains in bulk nonlinear crystals. Furthermore, a method of exceeding the fundamental conversion efficiency limit of direct three wave mixing is presented. The compact and robust nature of this novel laser system opens up the use of high power and high peak power mid-infrared laser pulses to a wide variety of important medical and dental applications.

摘要翻译： 公开了能够有效地生产2-15mum光谱区中的高能亚纳秒脉冲的激光系统。 二极管泵浦固体激光器用作泵浦源。 系统设计简单，可靠，紧凑，易于集成。 激光系统包括紧凑型固态〜1微米激光源的组合，产生高功率皮秒脉冲，具有光学参数放大和准连续波激光器，用于播种放大过程，使得能够有效地转换高功率〜1 微米激光辐射可调谐中红外sub-ns脉冲。 提出了新的参数化过程，以获得大量非线性晶体的高增益。 此外，提出了一种超过直接三波混频的基本转换效率极限的方法。 这种新颖的激光系统的紧凑和坚固的性质开启了大功率和高峰值功率的中红外激光脉冲对各种重要医疗和牙科应用的使用。

公开(公告)号：US20080037598A1

公开(公告)日：2008-02-14

申请号：US11739652

申请日：2007-04-24

申请人： R.J. Miller ,  Shujie Lin ,  Kresimir Franjic

发明人： R.J. Miller ,  Shujie Lin ,  Kresimir Franjic

IPC分类号： H01S3/10

CPC分类号： G02F1/353 ,  G02F1/3525 ,  G02F1/3534 ,  G02F1/3551 ,  G02F2001/3503 ,  G02F2001/3509 ,  H01S3/0092

摘要： A device for generating a frequency converted laser beam includes a nonlinear crystal having a first end face and a second end face opposed to the first end face. The nonlinear crystal is configured to receive at least one input laser beam at the first end face and output a frequency converted beam at the second face. A beam waist of the at least one input laser beam is positioned between the first end face and the second end face during a frequency conversion process. The device also includes a second crystal having a first end face bonded to the second end face of the nonlinear crystal and a second end face opposed to the first end face. A beam diameter of the frequency converted beam at the first end face of the second crystal is less than a beam diameter of the frequency converted beam at the second end face of the second crystal.

摘要翻译： 用于产生变频激光束的装置包括具有与第一端面相对的第一端面和第二端面的非线性晶体。 非线性晶体被配置为在第一端面处接收至少一个输入激光束并且在第二面处输出频率转换的光束。 在频率转换过程中，至少一个输入激光束的束腰定位在第一端面和第二端面之间。 该装置还包括具有接合到非线性晶体的第二端面的第一端面和与第一端面相对的第二端面的第二晶体。 在第二晶体的第一端面处的频率转换光束的光束直径小于第二晶体的第二端面处的频率转换光束的光束直径。

公开(公告)号：US20060195072A1

公开(公告)日：2006-08-31

申请号：US11321057

申请日：2005-12-30

申请人： R.J. Miller

发明人： R.J. Miller

IPC分类号： A61B18/18

CPC分类号： A61B18/20 ,  A61C1/0046 ,  B23K26/0624 ,  B23K26/36

摘要： The present invention provides a method of laser processing of materials, specifically laser induced ablation processes for laser removal of material particularly important in medical and dental applications in which the laser removal of material should be done in such a way as to not damage any of the surrounding soft or hard biomaterial. The ablation process is achieved by impulsive heat deposition (IHD) by direct and specific excitation of short lived vibrations or phonons of the material in such a way as to not generate highly reactive and damaging ions through multiphoton absorption. The heat deposition and ensuing ablation process under prescribed time and wavelength conditions for laser irradiation is achieved faster than heat transfer to surrounding tissue by either acoustic or thermal expansion or thermal diffusion that otherwise would lead to excess heat related damage. The result is that all the deposited laser energy is optimally channelled into the ablation process in which the inertially confined stresses from both photomechanical expansion forces and thermally driven phase transitions and associated volume changes constructively interfere to drive the most efficient ablation process possible with minimal damage to surrounding areas by either ionizing radiation or heat effects. By choosing a specific range of wavelengths, spatial and temporal shaping of infrared laser pulses, the energy can be optimally deposited in a manner that further increases the efficiency of the ablation process with respect to minimizing collateral damage.

摘要翻译： 本发明提供一种激光处理材料的方法，特别是用于激光去除在医疗和牙科应用中特别重要的材料的激光去除技术的方法，其中激光去除材料应以不损坏任何材料的方式进行 周围的软或硬生物材料。 通过冲击热沉积（IHD）通过直接和特异性激发材料的短暂的振动或声子来实现消融过程，以便通过多光子吸收不产生高反应性和有害的离子。 在规定的时间和波长条件下，用于激光照射的热沉积和随后的消融过程比通过声学或热膨胀或热扩散的热传递到周围组织的速度快，否则将导致过度的热相关损伤。 结果是，所有沉积的激光能量被最佳地引导到消融过程中，其中来自光机械膨胀力和热驱动相变和相关联体积变化的惯性约束应力构造地干涉以驱动最有效的消融过程，同时以最小的损伤 通过电离辐射或热效应的周围区域。 通过选择特定范围的波长，红外激光脉冲的空间和时间成形，可以以进一步提高消融过程效率以减少附带损伤的方式来最佳地沉积能量。