公开(公告)号：US5351260A

公开(公告)日：1994-09-27

申请号：US209345

申请日：1994-03-14

Applicant: Edward J. Seibert ,  Gerald D. Ferguson ,  Marie E. Taylor

Inventor： Edward J. Seibert ,  Gerald D. Ferguson ,  Marie E. Taylor

IPC: H01S3/03 ,  H01S3/038 ,  H01S3/097

CPC classification number: H01S3/031 ,  H01S3/038

Abstract: An electrode assembly for a gas or metal vapor discharge device is disclosed. A pair of electrode assemblies each comprising thoriated tungsten with an alloy composition of tungsten (W) and from about 2% to about 3% of thorium dioxide ThO2 are located at opposite ends of the discharge chamber of the discharge device. The tip of the electrode preferably has four slots equally spaced around its circumference and a groove at its outermost edge. The tip of the electrode provides mechanical flexibility that inhibits the cracking of the thoriated tungsten electrode when it is mounted in the discharge device. Each electrode assembly further comprises a copper spacer, preferably I-shaped in cross-section, brazed against the base of the electrode and against a vacuum flange. The pair of electrode assemblies confines the discharge of the discharge device between the tips of the electrodes and inhibits the arc condition from finding its way to delicate vacuum seals. The electrode assembly provides a clear optical aperture to allow light or laser radiation to exit the discharge cell.

Abstract translation: 公开了一种用于气体或金属蒸气放电装置的电极组件。 一对电极组件分别包括具有钨（W）的合金组成的钍钨和约2％至约3％的二氧化钍ThO 2的电极组件，位于放电装置的放电室的相对端。 电极的末端优选地具有围绕其圆周等间隔开的四个狭缝和在其最外边缘处的凹槽。 电极的尖端提供机械灵活性，其在安装在放电装置中时抑制钍钨电极的开裂。 每个电极组件还包括铜隔离物，优选为I形横截面，钎焊在电极的底部上并与真空凸缘相对。 该对电极组件将放电装置的放电限制在电极的尖端之间，并且阻止电弧状况发现其微妙的真空密封。 电极组件提供清晰的光学孔径以允许光或激光辐射离开放电单元。

公开(公告)号：US4408329A

公开(公告)日：1983-10-04

申请号：US965755

申请日：1978-12-04

Applicant: Gerald D. Ferguson

Inventor： Gerald D. Ferguson

IPC: H01S3/109 ,  H01S3/131 ,  H01S3/10

CPC classification number: H01S3/109 ,  H01S3/131 ,  H01S3/08054 ,  H01S3/08059 ,  H01S3/0813 ,  H01S3/115

Abstract: A laser device for generating frequency-doubled laser pulses at maximum eciency. A laser rod is optically pumped to radiate unpolarized light at 1.064.mu. wavelength for transmission within a ring-type resonator defined by a flat mirror and a turning prism. The light from one end of the rod is linearly polarized by a beam splitter into two parallel beams of orthogonal components which are transmitted through an 0.532.mu. output mirror, a frequency doubler phase matched for one component, and a Q-switch, to the turning prism for return along the beam of the other component to the beamsplitter. The output mirror, doubler and Q-switch are substantially ineffective during the pumping cycle, and because the component beam axes are reversed, the light does not return to the rod for stimulating light emission. After peak level pumping, however, the Q-switch is biased to rotate each component one quarter wavelength and return the components to combine and reenter the rod for stimulated light emission. The frequency doubler, now receiving high power radiation, transforms a portion of the returning 1.064.mu. component to a 0.532.mu. component which is then reflected out of the resonator by the output mirror.

Abstract translation: 一种用于以最大效率产生倍频激光脉冲的激光装置。 激光棒被光泵浦以辐射1.064μm波长的非偏振光以在由平面镜和转向棱镜限定的环型谐振器内传输。 来自杆的一端的光由分束器线性偏振成两个平行的正交分量束，其通过0.532μm输出反射镜传输，一个分量匹配的倍频相和一个Q开关，转向 棱镜用于沿着另一部件的光束返回到分束器。 输出反射镜，倍增器和Q开关在泵送循环期间基本上无效，并且由于分量光束轴反转，所以光不会返回到杆以刺激发光。 然而，在峰值电平泵浦之后，Q开关被偏置以使每个组件旋转四分之一波长并返回组件以组合并重新进入用于受激发光的棒。 现在接收高功率辐射的倍频器将返回的1.064μs分量的一部分转换成0.532μ的分量，然后由输出镜反射出谐振器。

公开(公告)号：US4438517A

公开(公告)日：1984-03-20

申请号：US210902

申请日：1980-11-28

Applicant: Lloyd C. Bobb ,  Michael Rankin ,  Gerald D. Ferguson

Inventor： Lloyd C. Bobb ,  Michael Rankin ,  Gerald D. Ferguson

IPC: H01S3/105 ,  H01S3/08

CPC classification number: H01S3/105

Abstract: An interferometrically tuned laser resonator for selectively resonating at desired wavelength or fluorescent line. A dielectric reflector having reflectance characteristics which shift toward shorter wavelengths at incident angles not normal thereto is rotatably mounted at one end of a laser cavity along its axis. Rotation of the reflector permits adjustment of the incidence angle to obtain maximum cavity gain at a desired fluorescent line over adjacent competing lines.

Abstract translation: 一种干涉式调谐的激光谐振器，用于在期望的波长或荧光线上选择性谐振。 具有反射率特性的电介质反射器可以沿着其轴线可旋转地安装在激光腔的一端处，以较短的波长向不正常的入射角移动。 反射器的旋转允许调整入射角，以在相邻竞争线上的期望荧光线获得最大腔增益。

公开(公告)号：US4093384A

公开(公告)日：1978-06-06

申请号：US729523

申请日：1976-10-04

Applicant: Gerald D. Ferguson

Inventor： Gerald D. Ferguson

IPC: G01J1/04 ,  G01J1/06 ,  G01S7/481 ,  G01J3/48

CPC classification number: G01J1/06 ,  G01S7/4816 ,  G01J1/0411 ,  G01J1/0488

Abstract: A narrow angle, narrow bandwidth optical receiver system for detecting light rays reflected from a predetermined area illuminated by a laser beam having a known wavelength. A large collecting lens having a small field of view receives incoming reflected rays which are collimated by a pair of relay lenses having a narrow bandwidth, triple cavity, single element interference filter positoned therebetween. The filtered rays are processed by a photomultiplier tube and a CRT display to illustrate signals of interest within the illuminated area. An alternate embodiment provides a cone element to receive filtered rays from relay lenses for decreasing the size of the receiver system.

Abstract translation: 一种用于检测从具有已知波长的激光束照射的预定区域反射的光线的窄角度窄带宽光接收器系统。 具有小视场的大型收集透镜接收由一对具有窄带宽的三中继透镜准直的入射反射光线，三腔，单元干涉滤光器位于其间。 经过滤光的光线由光电倍增管和CRT显示器处理，以示出照明区域内的感兴趣的信号。 一个替代实施例提供一种锥形元件，用于接收来自中继透镜的滤波光线以减小接收器系统的尺寸。

公开(公告)号：US4276518A

公开(公告)日：1981-06-30

申请号：US901955

申请日：1978-05-01

Applicant: Gerald D. Ferguson

Inventor： Gerald D. Ferguson

IPC: H01S3/08 ,  H01S3/081 ,  H01S3/11 ,  H01S3/02

CPC classification number: H01S3/115 ,  H01S3/082 ,  H01S3/08054 ,  H01S3/08072 ,  H01S3/0815

Abstract: A laser device for generating a high power output in a pulse transmission de. The laser corrects for thermally induced birefringence losses. A flashlamp is actuated to cause an atomic population inversion in an adjacent laser rod. Thereafter, population inversion in the rod is decreased and the laser intra-cavity optical field increased by a linear resonator. This resonator includes a mirror, the laser rod in a cavity generating a single laser beam, a birefringent crystal converting the single beam into a pair of beams each having a different polarity and vice versa on return, a half-wave plate placing the polarization of one of the beams in correspondence with that of the other beam, and a reflecting polarizer reflecting only that polarization through a Q-switch such as a Pockel's cell, inactivated, and to a second mirror. The second mirror reflects the pair of beams back through the switch and to the polarizer, from which they return to the birefringent crystal and laser rod. Thus, no part of any beam is lost during resonation due to birefringent effects. After sufficient time has been allowed for the laser optical field to reach a desired maximum level, bias voltage is provided to activate the Pockel's cell, causing the pair of beams returning therefrom to the reflecting polarizer to have a polarization which is passed through the polarizer as an output. A quarter-wave plate inserted in the resonator also reduces beam distortion resulting from birefringent effects.

Abstract translation: 一种用于在脉冲传输模式中产生高功率输出的激光装置。 激光校正热诱导双折射损失。 激活闪光灯以在相邻激光棒中引起原子群反转。 此后，杆中的群体反转减少，并且激光腔内光场由线性谐振器增加。 该谐振器包括反射镜，产生单个激光束的腔中的激光棒，将单个光束转换成一对光束的双折射晶体，每个光束在返回时具有不同的极性，反之亦然;半波片将偏振 与另一个光束相对应的光束中的一个以及仅通过诸如Pockel氏细胞的Q开关仅反射偏振的反射偏振器，而不是第二反射镜。 第二反射镜将一对光束反射回开关和偏振器，从这些光束返回到双折射晶体和激光棒。 因此，由于双折射效应，谐振期间任何波束的任何部分都不会丢失。 在允许激光光场达到期望的最大电平的足够的时间之后，提供偏置电压以激活普克尔电池，使得从其返回到反射偏振器的一对光束具有通过偏振器的偏振器作为 一个输出。 插入谐振器中的四分之一波片也减少了由双折射效应引起的波束失真。

公开(公告)号：US4150341A

公开(公告)日：1979-04-17

申请号：US754916

申请日：1976-12-28

Applicant: Gerald D. Ferguson

Inventor： Gerald D. Ferguson

IPC: H01S3/04 ,  H01S3/042 ,  H01S3/093 ,  H01S3/02

CPC classification number: H01S3/042 ,  H01S3/093 ,  H01S3/0407 ,  H01S3/0625

Abstract: A laser device for generating high input power by minimization of surface flection losses between adjacent elements of the device. A laser medium having an index of refraction substantially greater than 1.5 is fluid cooled in a sealed tube by an optically clear cooling medium having a substantially lower refractive index. The indices of the laser and cooling mediums are matched to each other by thin film coatings of index matching material attached to the laser medium, each coating having a thickness of one quarter of the lasing wavelength.

Abstract translation: 一种用于通过使器件的相邻元件之间的表面反射损失最小化来产生高输入功率的激光器件。 具有基本上大于1.5的折射率的激光介质通过具有基本上较低折射率的光学透明冷却介质在密封管中被流体冷却。 激光和冷却介质的指数通过连接到激光介质的折射率匹配材料的薄膜涂层彼此匹配，每个涂层具有激光波长的四分之一的厚度。

公开(公告)号：US4068190A

公开(公告)日：1978-01-10

申请号：US656775

申请日：1976-02-09

Applicant: Gerald D. Ferguson

Inventor： Gerald D. Ferguson

IPC: G02F1/37 ,  H01S3/115

CPC classification number: H01S3/115 ,  G02F1/37

Abstract: A laser system for ocean radar applications having a resonant chamber for producing a pair of homogenized, singularly polarized output beams having identical pulse widths and energies. A quarter wave plate is inserted within the optical path of the resonant chamber and rotates the birefringence effects of a laser crystal positioned within the chamber to generate a pair of homogenized, orthogonally polarized beams. A selected one of the orthogonally polarized beams is transmitted through a half wave plate and joins with the remaining beam for passage through a telescope assembly to minimize the cross-sectional area of the beams. A doubler crystal receives the telescoped beams and doubles the frequency thereof to form the pair of homogenized output beams having light energy in the green spectrum.

Abstract translation: 一种用于海洋雷达应用的激光系统，具有用于产生具有相同脉冲宽度和能量的一对均匀的，奇异偏振的输出光束的谐振室。 四分之一波片被插入到谐振室的光路内，并且旋转位于腔室内的激光晶体的双折射效应以产生一对均匀的正交偏振光束。 所选择的一个正交偏振光束通过半波片透射并与剩余的光束连接以通过望远镜组件以最小化光束的横截面积。 双倍晶体接收可伸缩光束并将其频率加倍，以形成在绿色光谱中具有光能的一对均匀化的输出光束。