专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4943782A Four-pass phase conjugate optical amplifier system and method 失效
标题翻译：四通相位共轭光放大器系统及方法
公开(公告)号：US4943782A
公开(公告)日：1990-07-24
申请号：US170957
申请日：1988-03-21
申请人： Ronald R. Stephens , Richard R. Craig , Huan W. Yen , Richard C. Lind
发明人： Ronald R. Stephens , Richard R. Craig , Huan W. Yen , Richard C. Lind
IPC分类号： H01S3/08 , G02F1/35 , H01S3/00 , H01S3/06 , H01S3/10 , H01S5/00 , H01S5/024 , H01S5/06 , H01S5/10 , H01S5/50
CPC分类号： H01S5/02423 , H01S3/005 , H01S3/10076 , H01S5/50 , H01S5/005 , H01S5/5036
摘要： A four-pass conjugate optical amplifier system and method are disclosed in which a linear polarized optical beam is directed by various optical elements through four passes of a power amplifier, preferably a diode laser structure. The beam is phase conjugated at the optical midpoint between the second and third amplifying passes, and is controlled by the optical elements so that its polarization is substantially the same during the first and second passes, and again substantially the same during the third and fourth amplifying passes. This is accomplished by a reflective coating on the back facet of the diode laser structure, with a non-reciprocal polarization rotation element located in the beam path between the phase conjugate mirror and power amplifier. For considerably enhanced power amplification, the beam may be divided into an array of subbeams, which are individually amplified by four passes through respective power amplifiers. The subbeams are processed by the optical system so that they recombine into a single coherent output beam after full amplification.
摘要翻译：公开了一种四通共轭光放大器系统和方法，其中线偏振光束由功率放大器，优选二极管激光器结构的四次通过各种光学元件引导。光束在第二和第三放大通道之间的光中点处相位共轭，并且由光学元件控制，使得其在第一次和第二次通过期间的极化基本相同，并且在第三和第四放大期间基本相同通过这是通过二极管激光器结构的背面上的反射涂层来实现的，其中非互易偏振旋转元件位于相位共轭反射镜和功率放大器之间的光束路径中。为了显着增强功率放大，光束可以被划分成子束阵列，其通过相应的功率放大器四次通过单独放大。子光束由光学系统处理，使得它们在完全放大之后复合成单个相干输出光束。

2. 发明授权

US4757268A Energy scalable laser amplifier 失效
标题翻译：能量可缩放激光放大器
公开(公告)号：US4757268A
公开(公告)日：1988-07-12
申请号：US736877
申请日：1985-05-22
申请人： Richard L. Abrams , Hans W. Bruesselbach , Concetto R. Giuliano , Richard C. Lind , Monica L. Minden , Thomas R. O'Meara , David A. Rockwell , Ronald R. Stephens
发明人： Richard L. Abrams , Hans W. Bruesselbach , Concetto R. Giuliano , Richard C. Lind , Monica L. Minden , Thomas R. O'Meara , David A. Rockwell , Ronald R. Stephens
IPC分类号： H01S3/08 , G02F20060101 , G02F1/35 , H01S3/10 , H01S3/23 , H01S5/00 , H01S3/098 , G01C3/08
CPC分类号： H01S3/10076 , H01S3/2383 , H01S3/2316 , H01S3/2333
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 to receive unamplified radiation (40) from master oscillator (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.
摘要翻译：激光装置（10）具有相干主振荡器辐射源（30），用于驱动位于操作上并联配置的多个激光增益元件（20），以便从主振荡器（30）接收未放大的辐射（40）并传输放大辐射（44）。输入装置（60）将辐射（40）的一部分从主振荡器耦合到每个所述增益元件（20）。可操作地耦合到增益元件（20）的相位共轭反射器装置（80）将放大的辐射（44）的相位共轭反射回到增益元件（20）中，在增益元件（20）中被进一步放大。输出耦合装置（90）将来自激光装置的多个增益元件（20）的放大的辐射作为单个相干输出的辐射束耦合。

3. 发明授权

US5999128A Multibeam phased array antennas and methods 失效
标题翻译：多波束相控阵天线和方法
公开(公告)号：US5999128A
公开(公告)日：1999-12-07
申请号：US81497
申请日：1998-05-19
申请人： Ronald R. Stephens , Jar J. Lee
发明人： Ronald R. Stephens , Jar J. Lee
IPC分类号： H01Q3/26 , H01Q25/00 , H01Q3/22
CPC分类号： H01Q3/2676 , H01Q25/00
摘要： Antenna structures are provided which facilitate the simultaneous radiation of multiple antenna beams. The structures include photonic manifolds that define equal-length optical paths and other optical paths whose lengths progressively change by a selected length .DELTA.L. The manifolds conduct signal pairs to radiative modules. Each signal pair includes a frequency-swept scanning signal s.sub.s and a reference signal s.sub.r whose frequency is a selected one of the sum and the difference of the frequencies of the scanning signal s.sub.s and a respective operating signal s.sub.o. Subsequently, the scanning signals are mixed with the reference signals and filtered to recover phase-shifted versions of each respective operating signal s.sub.o. The phase-shifted versions are radiated to form multiple radiated beams wherein each beam is scanned by changing the frequency of its respective scanning signal s.sub.s. The frequency of the scanning signals is selected to avoid generation of spurious radiated signals. This selection includes choosing the scanning signals so that each has a different integer number of 2.pi. phase shifts over the path length .DELTA.L. Methods of the invention permit the use of a common mixer and a common filter at each radiative module for processing all signal pairs.
摘要翻译：提供了天线结构，其有助于同时辐射多个天线波束。该结构包括定义等长光路和其长度逐渐变化了选定长度DELTA L的其他光路的光子歧管。歧管将信号对传导到辐射模块。每个信号对包括频率扫描扫描信号ss和参考信号sr，其频率是扫描信号ss的频率和相应的操作信号的和的和之间的选择的一个。随后，扫描信号与参考信号混合并被滤波以恢复每个相应操作信号的相移版本。相移版本被辐射以形成多个辐射光束，其中通过改变其各自的扫描信号ss的频率来扫描每个光束。选择扫描信号的频率以避免杂散辐射信号的产生。该选择包括选择扫描信号，使得每个扫描信号在路径长度DELTA L上具有不同的整数2个pip相移。本发明的方法允许在每个辐射模块处使用公共混频器和公共滤波器来处理所有信号对。

4. 发明授权

US5859611A Mixing and modulating methods and structures using nonlinear optical amplifiers 失效
标题翻译：使用非线性光学放大器的混合和调制方法和结构
公开(公告)号：US5859611A
公开(公告)日：1999-01-12
申请号：US803963
申请日：1997-02-21
申请人： Juan F. Lam , Ronald R. Stephens , Gregory L. Tangonan
发明人： Juan F. Lam , Ronald R. Stephens , Gregory L. Tangonan
IPC分类号： H01Q3/22 , H01Q3/26 , H04B10/17 , G02F1/03
CPC分类号： H04B10/2914 , H01Q3/22 , H01Q3/2676
摘要： Mixing and modulating methods are described for nonlinear optical amplifiers (30) which can generate intermodulation products of radio-frequency signals in an optical carrier signal (26) without the penalty of an optical conversion loss and without the need for radio-frequency mixers, electro-optic modulators and expensive polarization-maintaining optical fibers. The radio-frequency signals can be applied to either a bias port (36) or an optical input port (32) of the optical amplifier and are used to upconvert and downconvert signals in phased-array antenna and remote antenna embodiments of the invention.
摘要翻译：描述了用于非光学放大器（30）的混合和调制方法，其可以在光载波信号（26）中产生射频信号的互调产物，而不损失光转换损耗，并且不需要射频混频器 - 光学调制器和昂贵的偏振保持光纤。射频信号可以应用于光放大器的偏置端口（36）或光输入端口（32），并用于上变频和下变频本发明的相控阵天线和远端天线实施例中的信号。

5. 发明授权

US4494827A Imaging apparatus for transverse electrode electro-optic tunable filter 失效
标题翻译：横向电极电光可调滤光片成像设备
公开(公告)号：US4494827A
公开(公告)日：1985-01-22
申请号：US435522
申请日：1982-10-20
申请人： Richard L. Abrams , David M. Henderson , Douglas A. Pinnow , Ronald R. Stephens
发明人： Richard L. Abrams , David M. Henderson , Douglas A. Pinnow , Ronald R. Stephens
IPC分类号： G02F1/03
CPC分类号： G02F1/03 , G02F1/0305
摘要： An imaging apparatus which permits the use of a transverse electrode electro-optic tunable filter (TEOTF), despite its obscured aperture, to produce a high quality image. The imaging apparatus includes a suitable conventional anamorphic input optical system in combination with a stacked plurality of TEOTFs in which the platelet of each TEOTF is made of an electro-optic material of a known index of refraction (such as CdS of an index of .about.2.4), and is clad between its surface and its electrodes with a material having a lower index of refraction than the platelet material (such as SiO.sub.2 of an index of .about.1.5).
摘要翻译：尽管其遮蔽的孔径，允许使用横向电极电光可调滤波器（TEOTF）的成像设备产生高质量的图像。成像设备包括合适的常规变形输入光学系统与多个TEOTF的堆叠组合，其中每个TEOTF的血小板由已知折射率的电光材料制成（例如DIFFERENCE 2.4的指数的CdS ），并且其表面和其电极之间的折射率比片状材料（如DIFFERENCE 1.5的指数的SiO 2）折射率低的材料包覆。

6. 发明授权

US5386426A Narrow bandwidth laser array system 失效
标题翻译：窄带宽激光阵列系统
公开(公告)号：US5386426A
公开(公告)日：1995-01-31
申请号：US943161
申请日：1992-09-10
申请人： Ronald R. Stephens
发明人： Ronald R. Stephens
IPC分类号： H01S3/10 , H01S3/094 , H01S3/0941 , H01S3/1055 , H01S3/23 , H01S5/00 , H01S5/14 , H01S5/40
CPC分类号： H01S5/4062 , H01S3/094092 , H01S3/0941 , H01S5/148
摘要： A spectral narrowing of the output bandwidth from a laser array is obtained by feeding back to the array a portion of its emitted light, while outputting the remainder of the light emitted from the array. An optical system to accomplish this preferably includes a pair of lenses, together with a diffraction grating that can be positioned either in-line with the laser array and lenses, or in a side-arm along with one of the lenses. The lenses can be set up so that light from each laser element is fed back either to itself, or to a symmetrically located element on the opposite side of the system axis. For a multi-lobe output from the laser array, one of the lobes is used for feedback and the others as outputs, resulting in a narrowing of the output angular divergence as well as of the output bandwidth.
摘要翻译：通过向阵列反射其一部分发射光，同时输出从阵列发出的光的剩余部分，可获得来自激光器阵列的输出带宽的频谱变窄。实现这一目的的光学系统优选地包括一对透镜，以及可以与激光器阵列和透镜成一直线定位的衍射光栅，或者与其中一个透镜一起在侧臂中。透镜可以被设置成使得来自每个激光元件的光被反馈到其自身或对称的位于系统轴线相对侧的元件上。对于来自激光器阵列的多波瓣输出，波瓣中的一个用于反馈，而另一个用作输出，导致输出角度发散以及输出带宽的变窄。

7. 发明授权

US5861845A Wideband phased array antennas and methods 失效
标题翻译：宽带相控阵天线和方法
公开(公告)号：US5861845A
公开(公告)日：1999-01-19
申请号：US81672
申请日：1998-05-19
申请人： Jar J. Lee , Ronald R. Stephens , Harry T. Wang
发明人： Jar J. Lee , Ronald R. Stephens , Harry T. Wang
IPC分类号： G01S13/02 , G01S13/42 , H01Q3/22 , H01Q3/26 , H01Q5/00 , H01Q25/00
CPC分类号： H01Q3/22 , H01Q25/008 , H01Q3/2676 , G01S13/426 , G01S2013/0245
摘要： Wideband phased array antennas are provided that eliminate the need for phase shifters in the region of the array face. In addition, they generate less beam squint than conventional antennas. In one embodiment, they include an electronic signal generator, reference and scanning manifolds and an array of n radiative modules. The signal generator generates a variable-frequency scanning signal s.sub.s and a reference signal s.sub.r wherein the frequency of the reference signal s.sub.r is substantially a selected one of the sum and the difference of the frequencies of the scanning signal s.sub.s and an operating signal s.sub.o. The reference manifold receives and divides the reference signal s.sub.r into n reference signal samples which are progressively time delayed by a selectable one of m reference differential time delays .DELTA.t.sub.r. The scanning manifold receives and divides the scanning signal s.sub.o into n scanning signal samples which are progressively time delayed by a scanning differential time delay .DELTA.t.sub.s. Each of the radiative modules includes a mixing device, an electromagnetic radiator and a filter. The mixing device receives and mixes a respective one of the reference signal samples and a respective one of the scanning signal samples. The filter couples the mixing device to the radiator and is configured to pass the operating signal s.sub.o. Accordingly, an antenna beam is radiated from the array at m selectable scan angles with each of the scan angles varying in response to the frequency of the scanning signal s.sub.s. Multiband and two-dimensional embodiments are shown and described. The wideband characteristics of these antennas are especially suited for radar, electronic warfare and high data-rate communication applications.
摘要翻译：提供宽带相控阵天线，其不需要阵列面区域中的移相器。此外，它们比常规天线产生较少的光束斜率。在一个实施例中，它们包括电子信号发生器，参考和扫描歧管以及n个辐射模块的阵列。信号发生器产生可变频扫描信号ss和参考信号sr，其中参考信号sr的频率基本上是扫描信号ss和操作信号的和的频率和操作信号的和之间的选择的一个。参考歧管接收并将参考信号sr分成n个参考信号样本，这些参考信号采样被m个参考差分时间延迟DELTA tr中的可选择的一个延迟地延迟。扫描歧管接收并将扫描信号分成由扫描差分时间延迟DELTA ts逐渐延迟的n个扫描信号样本。每个辐射模块包括混合装置，电磁辐射器和过滤器。混合装置接收和混合参考信号样本中的相应一个和扫描信号样本中的相应一个。滤波器将混合装置耦合到散热器，并且被配置为使得操作信号如此传递。因此，天线波束以m个可选扫描角度从阵列辐射，每个扫描角度响应于扫描信号ss的频率而变化。显示和描述多频带和二维实施例。这些天线的宽带特性特别适用于雷达，电子战和高数据速率通信应用。

8. 发明授权

US5717516A Hybrid laser power combining and beam cleanup system using nonlinear and adaptive optical wavefront compensation 失效
标题翻译：混合激光功率组合和束清理系统采用非线性和自适应光波前补偿
公开(公告)号：US5717516A
公开(公告)日：1998-02-10
申请号：US825835
申请日：1997-04-04
申请人： Marvin B. Klein , David M. Pepper , Ronald R. Stephens , Thomas R. O'Meara , David Welch , Robert J. Lang , Jack L. Feinberg , Stuart MacCormack
发明人： Marvin B. Klein , David M. Pepper , Ronald R. Stephens , Thomas R. O'Meara , David Welch , Robert J. Lang , Jack L. Feinberg , Stuart MacCormack
IPC分类号： G02F1/39 , H01S3/00 , G02B6/26
CPC分类号： G02F1/397
摘要： An optical amplification system directs a diffraction-limited signal beam through a series of approximately 90.degree. crossings with a number of non-diffraction-limited pump beams in a photorefractive medium. All of the beams are s-polarized, resulting in an energy transfer from the pumps to the signal beam while leaving the signal beam diffraction-limited. The photorefractive medium is preferably a series of BaTiO.sub.3 :Rh crystals that receive the pump and signal beams through orthogonal faces, with their C-axes at approximately 45.degree. to both beams. A binary tree optical distribution network is used to minimize waveguide splits in forming a large number of pump beams. The outputs of several amplification modules are combined into a single output beam using adaptive optics, with the outputs from the different modules phase matched to each other by diverting two minor portions of the combined beam, partially overlapping the diverted beams and adjusting the amplification module phases to cancel phase differentials between the overlapped portions. Similarly, sets of combined and phase-matched beams can be combined with each other (again using adaptive optics) to generate still higher powers using a super module approach.
摘要翻译：光学放大系统通过在光折射介质中的许多非衍射受限的泵浦光束将衍射受限的信号光束引导通过一系列大约90°的交叉。所有的光束都是s偏振的，从而导致从泵到信号光束的能量传递，同时保持信号光束衍射受限。光折射介质优选是一系列BaTiO 3：Rh晶体，其通过正交面接收泵浦和信号光束，其C轴与两个波束大约45°。二叉树光分配网络用于最小化形成大量泵浦波束的波导分裂。使用自适应光学器件将多个放大模块的输出组合成单个输出光束，来自不同模块的输出通过转移组合光束的两个次要部分相互匹配，部分地与转向光束重叠并且调整放大模块相位以消除重叠部分之间的相位差。类似地，组合和相位匹配波束的组可以彼此组合（再次使用自适应光学器件）以使用超级模块方法来产生更高的功率。

9. 发明授权

US5059917A Optical phase conjugation apparatus including light pipe for multiple beam combination 失效
标题翻译：光束相结合装置，包括多束光束组合灯管
公开(公告)号：US5059917A
公开(公告)日：1991-10-22
申请号：US511665
申请日：1990-04-20
申请人： Ronald R. Stephens
发明人： Ronald R. Stephens
IPC分类号： G02F1/35 , H01S3/08 , H01S3/10 , H01S5/40
CPC分类号： H01S5/4025
摘要： A rectangular light pipe (38) and associated optical elements (36), (40) are used to produce an overlapped combination of an array of aberrated laser beams (32), (34) inside a phase conjugate mirror (42). The beam array (32), (34) is focussed onto the entrance face (38a) of the light pipe (38) in such a way that each beam (32), (34) spreads by diffraction and internal reflections to fill the exit face (38b) of the light pipe (38). An image of the exit face (38b), which is completely filled by the overlapped beams (32), (34), is focussed into the phase conjugate mirror (42) such as to produce an overlap spot (46) size which is independent of beam aberation level. The apparatus preserves the linear polarization of the input beams (32), (34), has low optical loss, and may be incorporated into a 2 pass (50), (74) or 4 pass (80) phase conjugate master-oscillator power amplifier.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式