-
公开(公告)号：US4930855A
公开(公告)日：1990-06-05
申请号：US202356
申请日：1988-06-06
申请人： George L. Clark , Lee O. Heflinger , Chandrasekhar Roychoudhuri , Robert E. Brooks , Madan M. Sharma
发明人： George L. Clark , Lee O. Heflinger , Chandrasekhar Roychoudhuri , Robert E. Brooks , Madan M. Sharma
IPC分类号： G02B6/34
CPC分类号： G02B6/4215 , G02B6/2931 , G02B6/29313 , G02B6/2938
摘要： Apparatus for multiplexing or demultiplexing multiple laser beams of different wavelength. In multiplexing, the outputs from multiple diode lasers are combined in such a manner as to produce a practically parallel set of beams for direction onto a diffraction grating. The latter component deflects each beam from its normal path by an angular amount determined from the wavelength of the incident light. The angles of incidence of the multiple beams are chosen to provide angles of diffraction that are practically identical for all wavelengths under consideration. In demultiplexing, similar apparatus includes a diffraction grating to provide angular dispersion of the multiple wavelengths, at least one lens to magnify the angular differences, and a set of detectors positioned in the paths of the dispersed beams of different wavelengths.
摘要翻译： 用于复用或解复用不同波长的多个激光束的装置。 在多路复用中，来自多个二极管激光器的输出以这样的方式组合，以便产生用于方向到衍射光栅上的几乎平行的光束组。 后一个组件使每个光束从其正常路径偏转由入射光的波长确定的角度量。 选择多个光束的入射角以提供对于所考虑的所有波长实际上相同的衍射角。 在解复用中，类似的装置包括衍射光栅以提供多个波长的角度色散，至少一个透镜以放大角度差，以及一组位于不同波长的分散光束的路径中的检测器。
-
公开(公告)号：US5886800A
公开(公告)日：1999-03-23
申请号：US47863
申请日：1993-04-15
申请人： Robert Aprahamian , George L. Clark , Lee O. Heflinger , Jesper Munch , Ralph Frederick Wuerker
发明人： Robert Aprahamian , George L. Clark , Lee O. Heflinger , Jesper Munch , Ralph Frederick Wuerker
CPC分类号： G02B26/06
摘要： A technique for correcting wavefront aberrations introduced by large primary optical elements in portions of the electromagnetic spectrum. The aberrations of the primary element are first transferred to a beacon beam and this aberrated beam is interfered with a reference beam in a holographic medium. These beams are then turned off and a beam from a distant object, containing the same aberrations, is allowed to diffract from the hologram. The diffracted beam from the hologram contains the image of the distant object with aberrations removed. Use of this technique permits the construction of large optical elements inexpensively, since surface tolerances of the elements can be substantially relaxed.
摘要翻译： 用于校正由电磁光谱的部分中的大的主要光学元件引入的波前像差的技术。 首要元件的像差首先转移到信标光束，并且该像差光束受到全息介质中的参考光束的干扰。 然后关闭这些光束，并且允许来自包含相同像差的远距离物体的光束从全息图衍射。 来自全息图的衍射光束包含去除了像差的远距离物体的图像。 使用这种技术允许廉价地构造大的光学元件，因为元件的表面公差可以基本上被放宽。
-
3.发明授权System for controlling the wavelength and colinearity of multiplexed laser beams 失效用于控制复用激光束的波长和共线性的系统
公开(公告)号：US4847479A
公开(公告)日：1989-07-11
申请号：US202358
申请日：1988-06-06
申请人： George L. Clark , Lee O. Heflinger
发明人： George L. Clark , Lee O. Heflinger
IPC分类号： G02B6/34 , H01S5/0683 , H01S5/0687 , H01S5/40
CPC分类号： H01S5/0687 , H01S5/4025 , H01S5/005 , H01S5/06243 , H01S5/06837 , H01S5/4012 , H01S5/4087
摘要： Apparatus and a related method for control of the colinearity of multiple laser output beams in a wavelength-multiplexed optical communications system. Multiple lasers of different wavelengths formed into a single composite beam by means of a diffraction grating and other optical components are subject to loss in colinearity due to wavelength drift and mechanical alignment drift. The apparatus of one disclosed embodiment of the invention includes an alignment detector for the output beam and a set of tracer modulation detectors responsive to tracer modulation signals impressed on the individual laser beams. Misalignment detected in any one or more of the laser beams contained in the output beam is corrected by temperature control of the appropriate lasers. In another disclosed embodiment of the invention, misalignment is detected by partially reflecting the output beams back through the diffraction grating and other optical components to the lasers, but at angles slightly divergent from the common plane of the lasers. Position detectors located adjacent to the lasers, but not in the same plane, receive the return beams and are coupled to temperature control devices to adjust the individual lasers' wavelength, and hence maintain the colinearity of the output beams.
摘要翻译： 用于控制波长复用光通信系统中的多个激光输出光束的共线性的装置和相关方法。 通过衍射光栅和其他光学部件形成为单个复合光束的不同波长的多个激光器由于波长漂移和机械对准漂移而在共线性中损失。 本发明的一个公开的实施例的装置包括用于输出光束的对准检测器和响应于施加在各个激光束上的示踪器调制信号的一组示踪器调制检测器。 通过适当的激光器的温度控制来校正包含在输出光束中的任何一个或多个激光束中检测到的未对准。 在本发明的另一个公开的实施例中，通过将衍射光栅和其它光学部件反射到激光器但是与激光器的公共平面稍微发散的角度部分反射输出光束来检测未对准。 位于与激光器相邻但不在同一平面内的位置检测器接收返回光束并耦合到温度控制装置以调节各激光器的波长，并因此保持输出光束的共线性。
-
公开(公告)号：US3934461A
公开(公告)日：1976-01-27
申请号：US506642
申请日：1974-09-16
CPC分类号： G01B9/021
摘要： Apparatus and method wherein a photographic plate is doubly exposed by pulsed laser illumination to record successive instants in the history of an object under consideration. The doubly exposed plate is then developed and the photograph or hologram is used to reproduce the object in full three-dimensional detail including subtle changes in the object in the form of interference fringes where the hologram is illuminated with continuous laser illumination.
摘要翻译： 装置和方法，其中照相板通过脉冲激光照射被双重曝光，以记录所考虑的物体的历史中的连续时刻。 然后显影双曝光的平板，并且使用照片或全息图以完整的三维细节再现对象，包括以连续的激光照明照亮全息图的干涉条纹形式的物体的微妙变化。
-
公开(公告)号：US5451874A
公开(公告)日：1995-09-19
申请号：US102443
申请日：1993-08-05
申请人： Lee O. Heflinger
发明人： Lee O. Heflinger
CPC分类号： G01R33/54 , G01R33/3635
摘要： A heterodyne pumping method and system are provided for producing gyromagnetic resonance in a sample. The system includes a unidirectional static magnetic field for polarizing the sample. A first oscillating magnetic field having a first frequency is applied to said sample in the direction of said static magnetic field. A second oscillating magnetic field having a second frequency is applied transverse to said static magnetic field. A magnetic resonance response exhibited by said sample is detected and filtered by a bandpass filter so as to eliminate any drive signal interference. First and second oscillating magnetic fields are selected having first and second frequencies that provide wideband frequency separation from the resonance frequency of the sample.
摘要翻译： 提供外差泵送方法和系统用于在样品中产生回旋磁共振。 该系统包括用于使样品偏振的单向静磁场。 具有第一频率的第一振荡磁场在所述静磁场的方向上施加到所述样品。 具有第二频率的第二振荡磁场横向于所述静磁场施加。 通过带通滤波器检测并滤波由所述样品表现的磁共振响应，以消除任何驱动信号干扰。 选择第一和第二振荡磁场具有提供与样品的共振频率的宽带频率分离的第一和第二频率。
-
公开(公告)号：US06243168B1
公开(公告)日：2001-06-05
申请号：US09283484
申请日：1999-04-01
IPC分类号： G01B902
CPC分类号： G01B11/04
摘要： A dynamic optical micrometer for measuring the position of a moving object is invented. The optical micrometer includes a laser for generating an optical signal, an RF signal generator, an acousto-optic modulator that is responsive to the optical signal and the RF signal and is operative to provide a first light beam and a second light beam that is up shifted in frequency by the RF frequency, an optical interferometer that reflects the first beam off the object and interferometrically combines the reflected light beam and the second light beam into a heterodyned signal, means responsive to the heterodyned signal and operative to produce an electrical signal at the optical beat frequency corresponding to the RF and means responsive to the RF signal and the electrical signal and operative to provide a linear output signal that corresponds to the position of the object. A method for accomplishing the same is also invented.
摘要翻译： 发明了用于测量移动物体的位置的动态光学千分尺。 光学千分尺包括用于产生光学信号的激光器，RF信号发生器，响应光信号和RF信号的声光调制器，并且可操作地提供第一光束和第二光束 在频率上以RF频率移位的光学干涉仪，其将第一光束反射离开物体并将反射光束和第二光束干涉地组合成外差信号，响应于外差信号并且可操作地产生电信号 对应于RF的光拍频率和响应于RF信号和电信号的装置并且可操作以提供对应于对象的位置的线性输出信号。 也发明了一种完成该方法的方法。
-
公开(公告)号：US5467214A
公开(公告)日：1995-11-14
申请号：US152647
申请日：1993-11-12
CPC分类号： G02F1/37 , H01S3/109 , H01S3/10076
摘要： Apparatus and a related method for generating a second harmonic frequency optical output from a fundamental frequency input beam, without significant birefringence. The apparatus includes two Type II doubler crystals of equal length arranged with their corresponding axes parallel to each other, and a polarization rotator positioned between the doubler crystals, to rotate the polarization angle of a residual fundamental frequency component of an output beam from one of the crystals by 90.degree. or an odd multiple of 90.degree.. Random birefringence introduced into one of the doubler crystals is virtually canceled in the other, and the assembly of the two crystals and the polarization rotator may be angularly adjusted as needed for phase matching or tuning, without detracting from the birefringence compensation capability. The invention is also disclosed in the context of a phase conjugated master oscillator power amplifier (PC MOPA) system.
摘要翻译： 用于从基频输入光束产生二次谐波频率光输出的装置和相关方法，没有显着的双折射。 该装置包括两个相等长度的II型倍频晶体，它们的对应的轴线彼此平行，并且偏振旋转器位于倍晶晶体之间，以使输出光束的剩余基频分量的偏振角从 晶体90°或90°的奇数倍。 引入到倍晶晶体之一中的随机双折射在另一个实际上被消除，并且两个晶体和偏振旋转器的组装可以根据需要进行角度调整，以进行相位匹配或调谐，而不会降低双折射补偿能力。 在相位共轭主振荡器功率放大器（PC MOPA）系统的上下文中也公开了本发明。
-
公开(公告)号：US4050035A
公开(公告)日：1977-09-20
申请号：US657794
申请日：1976-02-13
申请人： Ralph F. Wuerker , Lee O. Heflinger
发明人： Ralph F. Wuerker , Lee O. Heflinger
CPC分类号： H01S3/07 , H01S3/08059 , H01S3/081 , H01S3/08063 , H01S3/093
摘要： A laser of the type which generates linearly polarized light and including optical means for self-alignment. Among such polarized lasers are, for example, solid state lasers and particularly ruby lasers, as well as various gas lasers employing Brewster windows. The problem is solved by utilizing a corner reflector in the laser cavity which generates two parallel laser beams. In order to achieve effective laser operation the polarization determining aspect of the laser, that is the crystal axis or Brewster windows, must be so oriented with respect to the corner reflector that the laser beam in passing through the laser is so reflected by the corner reflector that the light will return through the laserable material with the same directon of polarization as that of the original laser beam generated by the laser.
摘要翻译： 产生线性偏振光的类型的激光器，并且包括用于自对准的光学装置。 在这些偏振激光器中，例如是固态激光器，特别是红宝石激光器，以及采用布鲁斯特窗口的各种气体激光器。 该问题通过在激光腔中利用角反射器来解决，该角反射器产生两个平行的激光束。 为了实现有效的激光操作，激光器的晶体轴或布鲁斯特窗口的偏振确定方面必须相对于角反射器被定向，使得穿过激光器的激光束被角反射器 光将以与激光产生的原始激光束相同的偏振方向返回可激光材料。
-
9.发明授权Optical communication system with a single polarized, phase modulated transmitted beam 有权具有单极化，相位调制的发射光束的光通信系统公开(公告)号：US06441938B1
公开(公告)日：2002-08-27
申请号：US09283053
申请日：1999-04-01
IPC分类号： H04B1000
CPC分类号： H04B10/505 , H04B10/25751 , H04B10/614 , H04B10/66
摘要： An optical communication system, using a radio frequency (RF) signal for communicating an analog communication signal, includes an optical transmitter and an optical receiver. The optical transmitter generates a reference light beam, generates a phase modulated communication light beam by phase modulating the reference light beam with the analog communication signal, polarizes a portion of the reference light beam and combines the polarized reference light beam and the phase modulated communication light beam. The optical receiver separates the reference light beam and the communication light beam, develops a shifted light beam that is shifted in frequency by the RF frequency, interferometrically combines the communication light beam with the shifted light beam to provide a heterodyne signal including information regarding the state of phase of the communication light beam, uses the heterodyne signal to produce an electrical signal at an optical beat frequency corresponding to the RF and with a phase corresponding to the state of phase of the communication light beam, and derives from the RF signal and the heterodyne signal an output signal that has a linear correspondence to the state of optical phase of the communication light beam and the analog communication signal.
摘要翻译： 使用射频（RF）信号传送模拟通信信号的光通信系统包括光发射机和光接收机。 光发射机产生参考光束，通过用模拟通信信号相位调制参考光束产生相位调制通信光束，使参考光束的一部分偏振，并将偏振参考光束和相位调制通信光 光束。 光接收器分离参考光束和通信光束，产生频率偏移RF频率的移位光束，将通信光束与移动光束进行干涉组合，以提供包含关于状态的信息的外差信号 通过使用该外差信号，以对应于RF的光拍频率和与通信光束的相位状态对应的相位产生电信号，并从RF信号和 外差信号是与通信光束的光相位状态和模拟通信信号呈线性对应的输出信号。
-
公开(公告)号：US5530348A
公开(公告)日：1996-06-25
申请号：US459078
申请日：1995-06-02
申请人： Lee O. Heflinger
发明人： Lee O. Heflinger
CPC分类号： G01R33/54 , G01R33/3635
摘要： A magnetometer is provided for detecting the intensity of a present magnetic field. The magnetometer includes a sample having a known resonance frequency response. A first source is provided for applying a first oscillating magnetic field having a first frequency to the sample. A second source is provided for applying a second oscillating magnetic field having a second frequency to the sample in a direction substantially transverse to the first oscillating magnetic field. A receiver is provided for detecting a frequency response output from the sample which is dependent upon the intensity of a present magnetic field so as to measure the intensity of the present magnetic field.
摘要翻译： 提供磁力计用于检测当前磁场的强度。 磁力计包括具有已知共振频率响应的样品。 第一源被提供用于向样本施加具有第一频率的第一振荡磁场。 第二源被提供用于在基本上横向于第一振荡磁场的方向上向样本施加具有第二频率的第二振荡磁场。 提供接收机，用于检测取决于当前磁场的强度的样本的频率响应输出，以便测量当前磁场的强度。
-
-
-
-
-
-
-
-
-
搜索结果
17 条记录 (耗时 0.031 秒)
