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1. 发明授权

US07039079B2 Pulsed CO2 laser including an optical damage resistant electro-optical switching arrangement 失效
标题翻译：脉冲CO2激光器包括光学损伤电光切换装置
公开(公告)号：US07039079B2
公开(公告)日：2006-05-02
申请号：US10389081
申请日：2003-03-14
申请人： Vernon Seguin , Leon Newman , John Kennedy , Joel Fontanella , Anthony DeMaria
发明人： Vernon Seguin , Leon Newman , John Kennedy , Joel Fontanella , Anthony DeMaria
IPC分类号： H01S3/10
CPC分类号： H01S3/2232 , H01S3/0315 , H01S3/09702 , H01S3/1075 , H01S3/1103 , H01S3/115
摘要： A laser includes a gain medium located in a laser resonator. The gain medium generates plane polarized radiation plane polarized in a first polarization orientation. An electro-optical switch is located in the resonator. When the switch is activated the polarization plane of the laser radiation is rotated to a second orientation after making a forward and a reverse pass through the optical switch. When the switch is deactivated, the polarization orientation of the forward and reverse transmitted laser radiation remains about the same. A polarization selective device is located in the resonator between the electro-optical switch and the gain medium. The polarization selective device is arranged to permit circulation in the resonator of laser radiation in the first polarization orientation, and to restrict circulation of laser radiation in the second polarization orientation. The Gain medium is energized and the switch activated to allow energy to build in the gain medium. The switch is then deactivated to allow laser radiation to circulate in the resonator and deliver a laser pulse. A method of activating the switch by a sequence of DC pulses is disclosed.
摘要翻译：激光器包括位于激光谐振器中的增益介质。增益介质产生以第一极化取向偏振的平面偏振辐射平面。电光开关位于谐振器中。当开关被激活时，激光辐射的偏振平面在通过光学开关的正向和反向通过之后被旋转到第二取向。当开关被禁用时，正向和反向传输的激光辐射的偏振方向保持大致相同。偏振选择装置位于电光开关和增益介质之间的谐振器中。偏振选择装置被布置成允许在第一极化取向中的激光辐射的谐振器中循环，并且限制第二偏振取向中的激光辐射的循环。增益介质通电，并且开关被激活以允许在增益介质中建立能量。然后禁用开关以允许激光辐射在谐振器中循环并传递激光脉冲。公开了通过一系列DC脉冲来激活开关的方法。

2. 发明申请

US20050069007A1 Q-switched CO2 laser for material processing 审中-公开
标题翻译： Q切换CO2激光器进行材料加工
公开(公告)号：US20050069007A1
公开(公告)日：2005-03-31
申请号：US10966943
申请日：2004-10-15
申请人： John Kennedy , Richard Hart , Lanny Laughman , Joel Fontanella , Anthony Demaria , Leon Newman , Robert Henschke
发明人： John Kennedy , Richard Hart , Lanny Laughman , Joel Fontanella , Anthony Demaria , Leon Newman , Robert Henschke
IPC分类号： G02F1/015 , B23K26/06 , B23K26/38 , G02F1/061 , H01S3/00 , H01S3/03 , H01S3/0943 , H01S3/107 , H01S3/11 , H01S3/115 , H01S3/117 , H01S3/13 , H01S3/223 , H01S3/23 , H01S3/22
CPC分类号： B23K26/0624 , B23K26/382 , B23K26/389 , B23K26/40 , B23K2103/40 , B23K2103/42 , B23K2103/50 , B23K2103/52 , H01S3/0057 , H01S3/03 , H01S3/08095 , H01S3/0813 , H01S3/09702 , H01S3/107 , H01S3/115 , H01S3/117 , H01S3/1305 , H01S3/2232 , H01S3/2325 , H01S3/2366
摘要： A simultaneously super pulsed Q-switched CO2 laser system for material processing comprises sealed-off folded waveguides with folded mirrors that are thin film coated to select the output wavelength of the laser. The system also comprises a plurality of reflective devices defining a cavity; a gain medium positioned within the cavity for generating a laser beam; a cavity loss modulator for modulating the laser beam, generating thereby one or more laser pulses; a pulsed signal generation system connected to the cavity loss modulator for delivering pulsed signals to the cavity loss modulator thereby controlling the state of optical loss within the cavity; a control unit connected to the pulsed signal generation system for controlling the pulsed signal generation system; and a pulse clipping circuit receptive of a portion of the laser beam and connected to the pulsed signal generation system for truncating a part of the laser pulses.
摘要翻译：用于材料处理的同时超级脉冲Q切换CO 2激光系统包括具有折叠反射镜的封闭折叠波导，薄膜被涂覆以选择激光器的输出波长。该系统还包括限定空腔的多个反射装置; 位于腔内的增益介质，用于产生激光束; 用于调制激光束的腔损失调制器，从而产生一个或多个激光脉冲; 连接到空腔损耗调制器的脉冲信号发生系统，用于将脉冲信号传送到空腔损耗调制器，从而控制腔内光损耗的状态; 连接到用于控制脉冲信号发生系统的脉冲信号发生系统的控制单元; 以及接收激光束的一部分并连接到用于截断一部分激光脉冲的脉冲信号发生系统的脉冲削波电路。

3. 发明授权

US07113529B2 Pulsed CO2 laser including an optical damage resistant electro-optical switching arrangement 有权
标题翻译：脉冲CO2激光器包括光学损伤电光切换装置
公开(公告)号：US07113529B2
公开(公告)日：2006-09-26
申请号：US10389158
申请日：2003-03-14
申请人： Vernon Seguin , Leon Newman , R. Russel Austin , Anthony DeMaria
发明人： Vernon Seguin , Leon Newman , R. Russel Austin , Anthony DeMaria
IPC分类号： G02H6/26
CPC分类号： H01S3/2232 , H01S3/0346 , H01S3/09702 , H01S3/106 , H01S3/115
摘要： An electro-optical switch includes an optical assembly arranged to transmit laser-radiation. The optical assembly comprises an active optical crystal. On one of two opposite surfaces of the crystal is an optical window formed from a material having a refractive index lower than the material of the crystal. Heat deposited, as a result of transmission of the laser-radiation, at the surface of the crystal in contact with the widow is transferred to the window, thereby reducing the potential for optical damage to the crystal surface. The window is sufficiently thick that it has an odd integer multiple of quarter-wavelengths optical thickness at a wavelength about equal to a wavelength of the laser-radiation, thereby behaving as an antireflection device for the crystal at that wavelength. In one embodiment of the optical assembly, the active optical crystal is a cadmium telluride crystal and the window is formed from cesium bromide.
摘要翻译：电光开关包括布置成透射激光辐射的光学组件。光学组件包括有源光学晶体。在晶体的两个相对表面中的一个表面上是由折射率低于晶体材料的材料形成的光学窗口。作为透射激光辐射的结果，在与寡妇接触的晶体的表面上进行热沉积被转移到窗口，由此降低了对晶体表面的光学损伤的可能性。窗口足够厚，使得其具有在等于激光辐射波长的波长处的四分之一波长光学厚度的奇整数倍，从而表现为在该波长处的晶体的抗反射装置。在光学组件的一个实施例中，有源光学晶体是碲化镉晶体，窗口由溴化铯形成。

4. 发明申请

US20050157762A1 Systems and methods for forming a laser beam having a flat top 失效
标题翻译：用于形成具有平坦顶部的激光束的系统和方法
公开(公告)号：US20050157762A1
公开(公告)日：2005-07-21
申请号：US10760687
申请日：2004-01-20
申请人： Anthony DeMaria , Leon Newman , Vernon Seguin
发明人： Anthony DeMaria , Leon Newman , Vernon Seguin
IPC分类号： B23K26/06 , B23K26/067 , B23K26/073 , G02B27/09 , H01S3/00 , H01S3/03 , H01S3/08 , H01S3/105 , H01S3/223 , H01S3/23 , H01S3/10
CPC分类号： G02B27/0927 , B23K26/0604 , B23K26/067 , B23K26/0732 , B23K26/0736 , G02B27/0977 , H01S3/0315 , H01S3/08031 , H01S3/10092 , H01S3/105 , H01S3/2232 , H01S3/2383
摘要： Multiple laser beams, each having a shape such as a Gaussian profile, can be incoherently combined to obtain a shaped, flat top laser beam. The combined laser beams can provide power levels necessary for material processing applications such as annealing, drilling, and cutting, while minimizing the amount of unused power. The lasers can be positioned in an array in order to shape the flat top beam, and can be staggered in position where necessary to give each output beam an equal beam path length. The relative frequencies and/or powers of the lasers can be adjusted to control the flatness and stability of the incoherently combined beam.
摘要翻译：每个具有诸如高斯分布的形状的多个激光束可以被不相干地组合以获得成形的平顶激光束。组合的激光束可以提供材料处理应用所需的功率等级，例如退火，钻孔和切割，同时最小化未使用功率的量。激光器可以被定位在阵列中以便形成平坦的顶部波束，并且可以在必要时交错地位以给出每个输出光束相等的光束路径长度。可以调节激光器的相对频率和/或功率以控制非相干组合光束的平坦度和稳定性。

5. 发明申请

US20060045150A1 Apparatus for modifying CO2 slab laser pulses 有权
标题翻译：用于修改CO2平板激光脉冲的装置
公开(公告)号：US20060045150A1
公开(公告)日：2006-03-02
申请号：US10932818
申请日：2004-09-02
申请人： Leon Newman , John Kennedy , Joel Fontanella , Phillip Gardner
发明人： Leon Newman , John Kennedy , Joel Fontanella , Phillip Gardner
IPC分类号： H01S3/10
CPC分类号： B23K26/0622 , B23K26/382 , B23K2101/42 , B23K2103/50 , G02F1/0327 , G02F2203/54 , H01S3/0057
摘要： The quality of pulses output from laser systems such as super-pulsed CO2 slab lasers can be improved using half-wavelength electro-optic modulators (EOMs), in combination with thin film polarizers (TFPs). A voltage applied across a CdTe crystal of the EOM rotates the polarization of a pulse passing through the EOM by 90°. The polarization determines whether the pulse passes through, or is redirected by, the TFP. The voltage applied to the crystal can be pulsed to prevent a drop in charge, which could allow radiation to leak to the application. A totem pole switch used to apply voltage to the EOM can receive a pulsed voltage for improved performance. Directing by the EOM allows pulses to be clipped at the front/back end(s), split into portions, and/or directed to separate scanners. Directing pulses or pulse portions to different scanners can increase the output of systems such as hole drilling systems.
摘要翻译：使用半波长电光调制器（EOM）与薄膜偏振器（TFP）组合，可以改善激光系统（例如超级脉冲CO 2/2）平板激光器输出的脉冲的质量。施加在EOM的CdTe晶体两端的电压将通过EOM的脉冲的极化旋转90°。极化决定脉冲是否通过TFP或被TFP重定向。施加到晶体的电压可以被脉冲以防止电荷下降，这可能使辐射泄漏到应用中。用于向EOM施加电压的图腾柱开关可以接收脉冲电压以提高性能。通过EOM引导允许在前/后端剪切脉冲，分割成部分，和/或指向分离的扫描仪。将脉冲或脉冲部分引导到不同的扫描仪可以增加系统的输出，例如钻孔系统。

6. 发明授权

US07046709B2 CO2 waveguide laser with beryllium oxide waveguides 有权
标题翻译：具有铍氧化物波导的CO2波导激光器
公开(公告)号：US07046709B2
公开(公告)日：2006-05-16
申请号：US10716001
申请日：2003-11-18
申请人： Vernon Seguin , Leon Newman , John Kennedy
发明人： Vernon Seguin , Leon Newman , John Kennedy
IPC分类号： H01S3/03
CPC分类号： H01S3/0315 , H01S3/0305 , H01S3/076 , H01S3/2232
摘要： A pulsed, Q-switched, waveguide CO2 laser includes a plurality of waveguide channels formed in a block of a beryllium oxide ceramic material and is operated at a wavelength between about 9.2 and 9.7 micrometers. The laser has an output power up to 55% greater than that of a similarly configured laser, operated at the same wavelength and pulse conditions, but wherein the waveguide channels are formed in a block of an alumina ceramic material.
摘要翻译：脉冲Q开关波导CO 2激光器包括形成在氧化铍陶瓷材料的块中的多个波导通道，并且在约9.2和9.7微米之间的波长下操作。激光器的输出功率比类似配置的激光器的输出功率高出55％，在相同的波长和脉冲条件下工作，但是其中波导通道形成在氧化铝陶瓷材料的块中。

7. 发明申请

US20050105581A1 CO2 waveguide laser with beryllium oxide waveguides 有权
标题翻译：具有铍氧化物波导的CO2波导激光器
公开(公告)号：US20050105581A1
公开(公告)日：2005-05-19
申请号：US10716001
申请日：2003-11-18
申请人： Vernon Seguin , Leon Newman , John Kennedy
发明人： Vernon Seguin , Leon Newman , John Kennedy
IPC分类号： H01S3/03 , H01S3/07 , H01S3/223
CPC分类号： H01S3/0315 , H01S3/0305 , H01S3/076 , H01S3/2232
摘要： A pulsed, Q-switched, waveguide CO2 laser includes a plurality of waveguide channels formed in a block of a beryllium oxide ceramic material and is operated at a wavelength between about 9.2 and 9.7 micrometers. The laser has an output power up to 55% greater than that of a similarly configured laser, operated at the same wavelength and pulse conditions, but wherein the waveguide channels are formed in a block of an alumina ceramic material.
摘要翻译：脉冲Q开关波导CO 2激光器包括形成在氧化铍陶瓷材料的块中的多个波导通道，并且在约9.2和9.7微米之间的波长下操作。激光器的输出功率比类似配置的激光器的输出功率高出55％，在相同的波长和脉冲条件下工作，但是其中波导通道形成在氧化铝陶瓷材料的块中。

8. 发明授权

US06784399B2 Micromachining with high-energy, intra-cavity Q-switched CO2 laser pulses 有权
标题翻译：用高能量，腔内Q开关CO2激光脉冲进行微加工
公开(公告)号：US06784399B2
公开(公告)日：2004-08-31
申请号：US10143040
申请日：2002-05-09
申请人： Corey M. Dunsky , Hisashi Matsumoto , Richard S. Harris , John T. Kennedy , Vernon A. Seguin , Leon Newman
发明人： Corey M. Dunsky , Hisashi Matsumoto , Richard S. Harris , John T. Kennedy , Vernon A. Seguin , Leon Newman
IPC分类号： B23K2638
CPC分类号： B28D1/221 , B23K26/0624 , B23K26/382 , B23K26/389 , B23K26/40 , B23K2101/40 , B23K2101/42 , B23K2103/08 , B23K2103/12 , B23K2103/16 , B23K2103/172 , B23K2103/42 , B23K2103/50 , B23K2103/52 , H01S3/0816 , H01S3/1024 , H01S3/115 , H01S3/2232 , H05K3/0026 , H05K3/0032 , H05K3/0038
摘要： An EOM Q-switched CO2 laser produces bursts of laser pulses delivered at a high PRF such as 20-140 kHz and having a short high-power spike of about 80-150 ns followed by a lower-power tail of about 0.05-12.0 &mgr;s. The bursts and/or laser pulses can be shaped by controlling the RF pumping duty cycle, the delay between the onset of RF pumping and the initiation of Q-switching, the pulse repetition frequency, and/or the duration of the tail. The bursts of laser pulses can be adapted to facilitate machining of metal layers and/or layers containing materials having disparate vaporization temperatures and/or disparate melting points, such as FR4 or green ceramics.
摘要翻译： EOM Q开关CO2激光器产生以高PRF（例如20-140kHz）传送的激光脉冲，并具有大约80-150ns的短大功率尖峰，之后是大约0.05-12.0μ的低功率尾部。脉冲串和/或激光脉冲可以通过控制RF泵送占空比，RF泵送开始与Q开关的开始之间的延迟，脉冲重复频率和/或尾部的持续时间来成形。激光脉冲的脉冲可以适于促进包含具有不同蒸发温度和/或不同熔点的材料的金属层和/或层的加工，例如FR4或绿色陶瓷。

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