公开(公告)号：US5147349A

公开(公告)日：1992-09-15

申请号：US254994

申请日：1988-10-07

申请人： Robert W. Johnson ,  Ralph B. Bettman ,  Acle V. Hicks ,  Michael Yessik

发明人： Robert W. Johnson ,  Ralph B. Bettman ,  Acle V. Hicks ,  Michael Yessik

IPC分类号： A61F9/00 ,  A61B18/20 ,  A61F9/008 ,  A61N5/06

CPC分类号： A61F9/00821 ,  A61F9/008 ,  A61B2018/2025 ,  A61F2009/00844 ,  A61F2009/00863

摘要： A diode laser device and method of use for achieving transcutaneous laser photocoagulation of the retina is described. A diode laser is used since it is much more efficient than the ion or dye lasers presently used for laser photocoagulation, and therefore will not require forced air of water cooling and can be made for compact. In addition, the diode laser can be used with standard 110 v wall sockets, and does not require the high power, three phase sockets required for the ion lasers. The end result is that compared to the ion laser device, the diode laser device can be brought directly into the operating room, which makes it ideal for transcutaneous delivery.A characteristic of diode lasers is that the emitted light diverges rapidly. In addition, the diode laser beam is emitted from a rectangular edge of a diode, and the light emitted along the longer sides of the rectangular edge will diverge more rapidly than that light emitted along the shorter sides of the rectangular edge. As a result, the emitted beam will become shaped as an ellipse as it travels from the rectangular edge.In one embodiment of the invention, the elliptical laser beam is shaped into a circle by an optical system before it is coupled to the fiber optic cable of the delivery system. In another embodiment, the fiber optic cable is directly coupled to the rectangular edge of the diode, making the optical system for shaping unnecessary.

公开(公告)号：US06414980B1

公开(公告)日：2002-07-02

申请号：US09416354

申请日：1999-10-12

申请人： Charles Xiaoyi Wang ,  Acle V. Hicks ,  Edward C. Rea, Jr.

发明人： Charles Xiaoyi Wang ,  Acle V. Hicks ,  Edward C. Rea, Jr.

IPC分类号： H01J305

CPC分类号： H01S3/117 ,  B33Y30/00 ,  G02F1/37 ,  H01S3/07 ,  H01S3/08072 ,  H01S3/10038 ,  H01S3/10046

摘要： A method for operating an extracavity frequency-converted solid-state laser for performing a laser processing operation is disclosed. The laser has a laser-resonator including an optically-pumped gain-medium. The resonator is configured to compensate for a predetermined range of thermal lensing in the gain-medium. An optically-nonlinear crystal located outside the resonator converts fundamental laser radiation delivered by the resonator into frequency converted radiation. The laser processing operation is performed by a train of pulses of the frequency-converted radiation having sufficient power to perform the processing operation. The power of frequency-converted radiation is dependent on delivery parameters of the laser radiation from the laser-resonator. The laser is operated in a manner which provides that the resonator delivers effectively the same average power of fundamental laser radiation before and during the laser processing operation. This provides that thermal-lensing in the gain-medium is within the predetermined range before and during a laser processing operation. Delivery parameters of the laser radiation before and during the processing operation are varied such that power of frequency-converted radiation generated before the processing operating is insufficient to perform a laser processing operation.

摘要翻译： 公开了一种用于操作用于执行激光加工操作的腔外频率转换固态激光器的方法。 该激光器具有包括光泵浦增益介质的激光谐振器。 谐振器被配置为补偿增益介质中的热透镜的预定范围。 位于谐振器外部的光学非线性晶体将由谐振器传递的基本激光辐射转换成变频辐射。 通过具有足够功率的频率转换辐射的一串脉冲来执行激光处理操作以执行处理操作。 频率转换辐射的功率取决于激光谐振器的激光辐射的传输参数。 激光器以这样的方式操作，其提供谐振器在激光加工操作之前和期间有效地提供相同的基本激光辐射的平均功率。 这提供了增益介质中的热透镜在激光加工操作之前和期间在预定范围内。 改变处理操作之前和期间的激光辐射的传送参数，使得在处理操作之前产生的频率转换辐射的功率不足以执行激光处理操作。