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1. 发明申请

WO1986007165A1 ENERGY SCALABLE LASER AMPLIFIER 审中-公开
标题翻译：能量可放大激光放大器
公开(公告)号：WO1986007165A1
公开(公告)日：1986-12-04
申请号：PCT/US1986001065
申请日：1986-05-08
申请人： HUGHES AIRCRAFT COMPANY
发明人： HUGHES AIRCRAFT COMPANY , ABRAMS, Richard, L. , BRUESSELBACH, Hans, W. , GUILIANO, Concetto, R. , LIND, Richard, C. , MINDEN, Monica, L. , O'MEARA, Thomas, R. , ROCKWELL, David, A. , STEPHENS, Ronald, R.
IPC分类号： G02F01/35
CPC分类号： H01S3/10076 , H01S3/2316 , H01S3/2333 , H01S3/2383
摘要： A laser apparatus (10) has a coherent master oscillator radiation source (30) for driving a plurality of laser gain elements (20) positioned in a operationally parallel configuration so as receive unamplified radiation (40) from master oscilltor (30) and transmitting amplified radiation (44). Input means (60) couples portion of radiation (40) from master oscillator to each of said gain elements (20). Phase conjugate reflector means (80) operatively coupled to gain elements (20) reflects the phase conjugate of amplified radiation (44) back into the gain elements (20) where it is further amplified. Output coupling means (90) couples amplified radiation from the plurality of gain elements (20) out of the laser apparatus as a single coherent output beam of radiation.

2. 发明申请

WO1989001644A1 OPTICAL NOTCH FILTER FOR DISCRIMINATING AGAINST COHERENT RADIATION 审中-公开
标题翻译：用于分辨相干辐射的光学插槽滤光片
公开(公告)号：WO1989001644A1
公开(公告)日：1989-02-23
申请号：PCT/US1988002247
申请日：1988-07-05
申请人： HUGHES AIRCRAFT COMPANY
发明人： HUGHES AIRCRAFT COMPANY , O'MEARA, Thomas, R.
IPC分类号： G02B26/06
CPC分类号： G01J9/02 , G01J2009/0211 , G02F1/11
摘要： A self-tuning optical notch filter is employed to separate coherent from noncoherent radiation in an overall beam. The presence of coherent radiation is detected, preferably with an interferometer, and the frequency of the detected coherent radiation is determined. An electrical control signal is generated with a frequency corresponding to that of the coherent radiation, and causes an optical filter to filter out the coherent radiation from the beam. In the preferred embodiment the optical filter is a Bragg cell, and the electrical control signal is applied to an electro-acoustic transducer which furnishes an acoustic control signal to the Bragg cell.
摘要翻译：采用自调谐光陷波滤波器将整个波束中的相干辐射与非相干辐射分离。检测到相干辐射的存在，优选地用干涉仪，并且确定检测到的相干辐射的频率。产生具有对应于相干辐射的频率的电气控制信号，并且使得滤光器滤出来自光束的相干辐射。在优选实施例中，滤光器是布拉格单元，并且电控信号被施加到向布拉格单元提供声控信号的电声换能器。

3. 发明申请

WO1989001647A1 PHASE CONTROLLED LIGHT DEFLECTOR 审中-公开
标题翻译：相控灯光偏转器
公开(公告)号：WO1989001647A1
公开(公告)日：1989-02-23
申请号：PCT/US1988002742
申请日：1988-08-12
申请人： HUGHES AIRCRAFT COMPANY
发明人： HUGHES AIRCRAFT COMPANY , GRINBERG, Jan , O'MEARA, Thomas, R. , OWECHKO, Yuri , PEDINOFF, Melvin, E. , SOFFER, Bernard, H.
IPC分类号： G02F01/29
CPC分类号： G02F1/292 , G02F1/134336 , G02F1/1347 , G02F1/1393 , G02F2203/01 , G02F2203/02 , G02F2203/24
摘要： An optical beam scanner incorporating an array of beam deflection elements commonly controlled to steer an optical beam impingent on the array is described. The beam steering elements are arranged in the array as individually controlled elements and the deflection of the beam is accomplished by setting the phase tilt and the phase offset of each element according to a calculation which removes modulo 2 pi phase shift from the required position relative to a flat plane. Thus, the array elements can be thin and need only supply about 2 radians of phase shift. These elements may be incorporated in a planar array using beam deflection elements such as liquid crystal beam deflectors by choosing a drive scheme representing either a blazed array or a flat piston array. Operation may be designed for a large range of light wavelengths and the system may efficiently accommodate a combination of the blazed and flat piston techniques to obtain beam deflection characteristics otherwise unavailable by the exclusive use of each individual technique. By use of the liquid crystal phased array approach, rapid, high accuracy, large area beam deflection is possible without the necessity of any moving parts and with low power drive requirements. Phased arrays of the type described above may be arranged in successive parallel planes with an common beam axis to provide two-dimensional beam deflection.
摘要翻译：描述了一种光束扫描器，其包括通常被控制以引导照射在阵列上的光束的光束偏转元件阵列。光束操纵元件作为独立控制的元件布置在阵列中，并且通过根据计算来设置每个元件的相位倾斜和相位偏移来实现光束的偏转，该计算从相对于所需位置移除模2π相移平面飞机因此，阵列元件可以是薄的，并且仅需要提供约2弧度的相移。通过选择表示闪耀阵列或平坦活塞阵列的驱动方案，这些元件可以使用诸如液晶束偏转器的光束偏转元件并入平面阵列中。操作可以设计用于大范围的光波长，并且系统可以有效地适应闪耀和平坦活塞技术的组合以获得否则不能通过各自独占技术的独占使用而获得光束偏转特性。通过使用液晶相位阵列方法，可以快速，高精度，大面积的光束偏转，而不需要任何移动部件和低功率驱动要求。上述类型的相控阵列可以布置在具有公共射束轴的连续平行平面中，以提供二维射束偏转。

4. 发明申请

WO1988007778A1 IMPROVED MASTER-OSCILLATOR POWER-AMPLIFIER LASER SYSTEM 审中-公开
标题翻译：改进的主振荡器功率放大器激光系统
公开(公告)号：WO1988007778A1
公开(公告)日：1988-10-06
申请号：PCT/US1988000249
申请日：1988-01-25
申请人： HUGHES AIRCRAFT COMPANY
发明人： HUGHES AIRCRAFT COMPANY , O'MEARA, Thomas, R.
IPC分类号： H01S03/23
CPC分类号： H01S3/2333 , H01S3/0064 , H01S3/083 , H01S3/10076
摘要： An improved phase conjugate master-oscillator power-amplifier laser system for providing a high-power low distortion laser output beam. The system includes an improved oscillator (55) such as a ring oscillator which rejects any of the output beam which is inadvertently fed back to the oscillator, thereby preventing unwanted oscillation. The system also includes an attenuator such as a spatial filter (57) or an optical isolator that attenuates any amplified spontaneous emissions that may be reflected from the power amplifier to the oscillator, thereby preventing oscillator degradation that would otherwise result. The invention is particularly well-suited for a laser system which employs an SBS mirror phase conjugation.
摘要翻译：一种改进的相位共轭主振荡器功率放大器激光系统，用于提供大功率低失真的激光输出光束。该系统包括改进的振荡器（55），例如环形振荡器，其拒绝任何不经意地反馈到振荡器的输出光束，从而防止不必要的振荡。该系统还包括衰减器，例如空间滤波器（57）或光隔离器，其衰减可能从功率放大器反射到振荡器的任何放大的自发发射，从而防止否则将导致的振荡器降级。本发明特别适用于采用SBS镜相共轭的激光系统。

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