公开(公告)号：US6075803A

公开(公告)日：2000-06-13

申请号：US85128

申请日：1998-05-27

申请人： Douglas J. Bull ,  Qiang Fu

发明人： Douglas J. Bull ,  Qiang Fu

IPC分类号： H01S3/094 ,  H01S3/02 ,  H01S3/042 ,  H01S3/0941 ,  H01S3/091

CPC分类号： H01S3/0941 ,  H01S3/025 ,  H01S3/0401 ,  H01S3/042 ,  H01S3/061 ,  H01S3/094084

摘要： A method and apparatus pump a laser gain medium of a laser rod having a first longitudinal axis. At least one pump light source emits pump light to the laser rod, and the pump light source has a second longitudinal axis which is perpendicular to the first longitudinal axis. Radiation from various laser diode arrays is collimated and uniquely arranged in a vertical orientation in relation to the laser gain medium. Reflectors focus the collimated radiation from the diode arrays onto the laser gain medium to achieve fundamental mode operation or Transverse Electromagnetic mode (TEM00 mode) operation. Both laser gain medium and reflectors may be simultaneously cooled with appropriate fluids in the apparatus. The assembly of the apparatus may be extended to hold a plurality of vertically oriented laser diode arrays to increase the laser pump power.

摘要翻译： 一种方法和装置，泵送具有第一纵向轴线的激光棒的激光增益介质。 至少一个泵浦光源向激光棒发射泵浦光，并且泵浦光源具有垂直于第一纵向轴线的第二纵向轴线。 相对于激光增益介质，来自各种激光二极管阵列的辐射被准直和独特地排列成垂直取向。 反射器将来自二极管阵列的准直辐射聚焦到激光增益介质上以实现基模操作或横向电磁模式（TEM00模式）操作。 激光增益介质和反射器可以在设备中用适当的流体同时冷却。 可以将装置的组件延伸以保持多个垂直取向的激光二极管阵列以增加激光泵功率。

公开(公告)号：US20050088654A1

公开(公告)日：2005-04-28

申请号：US10973969

申请日：2004-10-26

申请人： Wentao Hu ,  Qiang Fu ,  Mark Ortiz

发明人： Wentao Hu ,  Qiang Fu ,  Mark Ortiz

IPC分类号： B23K26/06 ,  B23K26/40 ,  G01N21/64 ,  G02B26/02 ,  G01N21/00

CPC分类号： G01N21/6402 ,  B23K26/0604 ,  B23K26/0622 ,  B23K26/40 ,  B23K2103/16 ,  B23K2103/30 ,  B23K2103/42 ,  B23K2103/50 ,  G01N21/255 ,  G01N21/645 ,  G01N2021/6419 ,  G01N2021/6421 ,  G02B26/02

摘要： A multi-headed laser apparatus combining a two or more lasers in a single housing with a single output beam. In addition to the housing, other components can be shared among the lasers such as the power supply, intracavity shutter, and excitation lamp. Additionally, the combination of two or more lasers with different characteristics makes possible a wide range of applications in the areas of materials processing and analysis, among others. A further multi-laser device is disclosed in which the wavelength of one or more of the lasers can be varied.

摘要翻译： 将单个外壳中的两个或更多个激光器与单个输出光束组合的多头激光装置。 除了外壳之外，其他部件可以在诸如电源，腔内快门和激发灯之类的激光器之间共享。 另外，具有不同特性的两个或更多个激光器的组合使得在材料加工和分析等领域中广泛的应用成为可能。 公开了另一种多激光装置，其中一个或多个激光器的波长可以变化。

公开(公告)号：US07079558B2

公开(公告)日：2006-07-18

申请号：US10999711

申请日：2004-11-30

申请人： Faming Xu ,  Qiang Fu ,  Brian Rogers ,  Zhengyu Chen ,  Wentao Hu

发明人： Faming Xu ,  Qiang Fu ,  Brian Rogers ,  Zhengyu Chen ,  Wentao Hu

IPC分类号： H01S3/98 ,  H01S3/13 ,  H01S3/00

CPC分类号： H01S3/136 ,  H01S3/08 ,  H01S3/08045 ,  H01S3/1068 ,  H01S3/1109 ,  H01S3/1305 ,  H01S3/139

摘要： A method and apparatus for stabilizing the output of a mode-locked laser by monitoring the temporal behavior of the pulse train profile and controlling the laser cavity optical length and/or loss modulation frequency accordingly. A mismatch of the cavity optical length and the loss modulation frequency will yield a first characteristic noise condition on the laser beam pulse train when the optical length is too short for a given loss modulation frequency and a second, different noise condition when the optical length is too long. The laser beam is monitored and analyzed to determine which noise condition is present. The cavity optical length is adjusted accordingly by movement of one or more optical elements or by changing the index of refraction of one or more optical elements. In the alternative, or additionally, the loss modulation frequency can be adjusted to bring the laser back into mode lock.

摘要翻译： 一种用于通过监视脉冲序列轮廓的时间特性并相应地控制激光腔光学长度和/或损失调制频率来稳定锁模激光器的输出的方法和装置。 当光学长度对于给定的损耗调制频率来说太短时，激光束脉冲串上的光学长度和损耗调制频率的不匹配将产生第一特征噪声条件，当光学长度为 太长。 监测和分析激光束以确定存在哪种噪声条件。 相应地通过一个或多个光学元件的移动或通过改变一个或多个光学元件的折射率来调整腔光学长度。 在替代方案中，或者另外，可以调整损耗调制频率以使激光器恢复模式锁定。

公开(公告)号：US5943351A

公开(公告)日：1999-08-24

申请号：US17342

申请日：1998-02-02

申请人： Fuzheng Zhou ,  Qiang Fu ,  Michael Maikowski

发明人： Fuzheng Zhou ,  Qiang Fu ,  Michael Maikowski

IPC分类号： G02F1/37 ,  G02F1/35 ,  H01S3/109 ,  H01S3/10

CPC分类号： H01S3/109 ,  G02F2001/354 ,  G02F2001/3542

摘要： Intra-cavity and/or inter-cavity sub-resonators with dielectric coated mirrors have anti-reflection and high-reflection coatings to attain high efficiency third and higher order harmonics generation of laser radiation. Main-resonators and sub-resonators enhance the fundamental and harmonic oscillations, respectively, which result in high conversion efficiency of third harmonics and higher. Such improved lasing efficiency may be implemented in high power lasers for improved power performance to attain over 8 W of UV output power with a high repetition rate. The use of intra-cavity THG techniques provide high efficiency by using existing high intensities of the input fundamental frequencies available in the intra-cavity region of the laser to avoid damage to components of the laser, such as the laser crystal. The THG utilizes a double-pass and/or multi-pass arrangement, which results in about a 60% increase in output power compared to a single-pass configuration. Also, blocking of UV energy generated in a return pass is performed to eliminate damage by the UV to the components in the main cavity.

摘要翻译： 具有介电涂层镜的腔内和/或腔间次谐振器具有抗反射和高反射涂层，以实现激光辐射的高效率三次谐波和高次谐波产生。 主谐振器和副谐振器分别增强了基波和谐波振荡，导致三次谐波的高转换效率和更高的谐波振荡。 这种改进的激光效率可以在高功率激光器中实现，以改善功率性能，以高重复率获得超过8W的UV输出功率。 使用腔内THG技术通过使用在激光器的腔内区域内可用的输入基频的现有高强度来避免损坏诸如激光晶体的激光器的部件，从而提供高效率。 THG采用双通和/或多通道布置，与单通配置相比，输出功率增加约60％。 此外，执行在返回通道中产生的UV能量的阻挡以消除UV对主腔中的部件的损伤。

公开(公告)号：US20050180468A1

公开(公告)日：2005-08-18

申请号：US11105899

申请日：2005-04-13

申请人： Wentao Hu ,  Qiang Fu ,  Mark Ortiz

发明人： Wentao Hu ,  Qiang Fu ,  Mark Ortiz

IPC分类号： B23K26/06 ,  B23K26/40 ,  G01N21/64 ,  G02B26/02 ,  H01S3/10

CPC分类号： G01N21/6402 ,  B23K26/0604 ,  B23K26/0622 ,  B23K26/40 ,  B23K2103/16 ,  B23K2103/30 ,  B23K2103/42 ,  B23K2103/50 ,  G01N21/255 ,  G01N21/645 ,  G01N2021/6419 ,  G01N2021/6421 ,  G02B26/02

摘要： A multi-headed laser apparatus combining a two or more lasers in a single housing with a single output beam. In addition to the housing, other components can be shared among the lasers such as the power supply, intracavity shutter, and excitation lamp. Additionally, the combination of two or more lasers with different characteristics makes possible a wide range of applications in the areas of materials processing and analysis, among others. A further multi-laser device is disclosed in which the wavelength of one or more of the lasers can be varied.

摘要翻译： 将单个外壳中的两个或更多个激光器与单个输出光束组合的多头激光装置。 除了外壳之外，其他部件可以在诸如电源，腔内快门和激发灯之类的激光器之间共享。 另外，具有不同特性的两个或更多个激光器的组合使得在材料加工和分析等领域中广泛的应用成为可能。 公开了另一种多激光装置，其中一个或多个激光器的波长可以变化。

公开(公告)号：US20050117614A1

公开(公告)日：2005-06-02

申请号：US10999711

申请日：2004-11-30

申请人： Faming Xu ,  Qiang Fu ,  Brian Rogers ,  Zhengyu Chen ,  Wentao Hu

发明人： Faming Xu ,  Qiang Fu ,  Brian Rogers ,  Zhengyu Chen ,  Wentao Hu

IPC分类号： H01S20060101 ,  H01S3/00 ,  H01S3/08 ,  H01S3/098 ,  H01S3/106 ,  H01S3/13 ,  H01S3/136 ,  H01S3/139

CPC分类号： H01S3/136 ,  H01S3/08 ,  H01S3/08045 ,  H01S3/1068 ,  H01S3/1109 ,  H01S3/1305 ,  H01S3/139

摘要： A method and apparatus for stabilizing the output of a mode-locked laser by monitoring the temporal behavior of the pulse train profile and controlling the laser cavity optical length and/or loss modulation frequency accordingly. A mismatch of the cavity optical length and the loss modulation frequency will yield a first characteristic noise condition on the laser beam pulse train when the optical length is too short for a given loss modulation frequency and a second, different noise condition when the optical length is too long. The laser beam is monitored and analyzed to determine which noise condition is present. The cavity optical length is adjusted accordingly by movement of one or more optical elements or by changing the index of refraction of one or more optical elements. In the alternative, or additionally, the loss modulation frequency can be adjusted to bring the laser back into mode lock.

摘要翻译： 一种用于通过监视脉冲序列轮廓的时间特性并相应地控制激光腔光学长度和/或损失调制频率来稳定锁模激光器的输出的方法和装置。 当光学长度对于给定的损耗调制频率来说太短时，激光束脉冲序列的不匹配和损耗调制频率将产生第一特征噪声条件，当光学长度为 太长。 监测和分析激光束以确定存在哪种噪声条件。 相应地通过一个或多个光学元件的移动或通过改变一个或多个光学元件的折射率来调整腔光学长度。 在替代方案中，或者另外，可以调整损耗调制频率以使激光器恢复模式锁定。

公开(公告)号：US6151341A

公开(公告)日：2000-11-21

申请号：US85637

申请日：1998-05-27

申请人： Douglas J. Bull ,  Qiang Fu

发明人： Douglas J. Bull ,  Qiang Fu

IPC分类号： H01S3/0941 ,  H01S5/024 ,  H01S5/40 ,  H01S3/04

CPC分类号： H01S5/4025 ,  H01S3/0941 ,  H01S5/02423

摘要： Stackable laser array elements may be configured to absorb heat effectively from laser elements, to be efficiently repaired and/or replaced, and to be effectively tested. An assembly includes readily replaceable cells having a cavity for the passage of coolant therethrough to cool the laser elements. The cells may be constructed individually for individual testing, and then stacked together and removably secured for easy replacement. The cavities of the cells form a substantially contiguous cavity through the entire assembly for the flow of coolant into and out of the assembly. The cavities of the cells include regions and surfaces which enhance the flow of coolant to regions substantially adjacent to the laser elements for the cooling thereof to provide enhanced cooling of the laser elements in the stack of cells. The flow of the coolant is oriented vertically with respect to horizontally oriented laser elements. Various recesses and grooves in the cells permit monitoring devices such as temperature and light sensors to be positioned to collect sensor data to monitor proper operation of the assembly and the laser elements therein.

摘要翻译： 可叠置的激光阵列元件可以被配置为有效地从激光元件吸收热量，以有效地修复和/或更换，并且被有效地测试。 组件包括易于更换的电池，其具有用于使冷却剂通过的空腔以冷却激光元件。 单元可以单独构造用于单独测试，然后堆叠在一起并可移除地固定以便于更换。 电池的空腔通过整个组件形成基本相邻的空腔，用于使冷却剂流入和流出组件。 电池的空腔包括增强冷却剂流到基本上与激光元件相邻的区域的区域和表面，用于冷却，以提供电池堆中的激光元件的增强的冷却。 冷却剂的流动相对于水平定向的激光元件垂直取向。 单元中的各种凹槽和凹槽允许诸如温度和光传感器的监测装置被定位成收集传感器数据以监测组件和其中的激光元件的适当操作。