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21.发明公开Method and apparatus for the correction of optical signal wave front distortion within a free-space optical communication system 审中-公开方法和装置用于在自由空间光通信系统中校正的波前失真
公开(公告)号：EP1271806A1
公开(公告)日：2003-01-02
申请号：EP02251579.5
申请日：2002-03-06
IPC分类号： H04B10/10
CPC分类号： H04B10/1121
摘要： A free space optical communication system is disclosed whereby the optics of a transmit telescope are manipulated using adaptive optics to precompensate for wave front distortion of a light beam transmitted by a transmit telescope. Wave front distortion is manifested at the receive telescope as a change in at least one characteristic of the image of the received signal such as, for example, a reduction in the amplitude of the received signal. A mirror of the transmit telescope is deformed in such a way as to reduce the wave front distortion and correspondingly increase the resulting amplitude of the received signal.
摘要翻译： 自由空间光通信系统是游离缺失盘，由此发射望远镜的光学器件是使用自适应光学，用于预补偿的光束反式由发射望远镜mitted的波前畸变操纵。 波前畸变表现在接收望远镜作为在接收信号中的所述图像的至少一个特性的变化：诸如，例如，在接收到的信号的振幅的减小。 发射望远镜的反射镜在寻求一种方式，以减少波前失真和相应地增加了接收信号的振幅得到的变形。
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22.发明公开Method and apparatus for controlling received power levels within a free space optical communication system 审中-公开用于控制服务的方法和装置在自由空间光通信系统接收
公开(公告)号：EP1195926A1
公开(公告)日：2002-04-10
申请号：EP01303502.7
申请日：2001-04-17
IPC分类号： H04B10/10
CPC分类号： H04B10/1121
摘要： A free space optical communication system is disclosed whereby the received power at the receive optical fiber is reduced by adjusting the transmitted light beam and the receive optical fiber with respect to each other when a specified power threshold is exceeded so that they intersect not at a point of focus, but at a point of divergence of the transmitted beam. In one embodiment, the transmitted beam may be diverged by moving the transmit optical fiber to a point in front of the focal plane of the transmit telescope along the longitudinal axis of that telescope until at least a portion of the beam is incident upon the receive optical fiber. This causes the transmitted beam to diverge and, accordingly, the cross-sectional area to increase at the point where it is incident upon the receive telescope. As a result, the cross-sectional power per unit area of the transmitted beam at the receive telescope is reduced which correspondingly reduces the power that is incident upon the receive optical fiber.
In another embodiment, instead of moving the optical fiber at the transmit telescope, the optical fiber located at the focal plane of the receive telescope may be moved to either a point in front of or to a point to the rear of the focal plane of the receive telescope along the longitudinal axis of the receive telescope. Since the maximum possible received power is achieved at the focal point within the focal plane, any movement of the receive optical fiber away from the focal point along the longitudinal axis of the receive telescope will result in a reduction of the received power.摘要翻译： 自由空间光通信系统中，盘游离缺失，由此在接收光纤的接收功率通过调节反mitted光束减少，并且接收光纤相对于海誓山盟当超过指定的功率阈值，使得thatthey相交于一点不 焦点的，但在反mitted光束的发散的一个点。 在一个，实施例中，反式mitted光束可以通过在沿着做望远镜的纵向轴线的发射望远镜的焦平面的前面发射光纤移动到一个点，直到光束的至少一部分发散入射到接收光 纤维。 这使得反式mitted束发散，因此，横截面面积，以在该点处增加它入射到接收望远镜。 其结果是，每在反式mitted光束的单位面积的横截面功率接收望远镜被相应地降低了功率所做的是在接收光纤入射减少。 在另一个实施方式，而不是光纤在发送望远镜移动时，光纤定位在接收望远镜的焦平面可以被移动到其前方或向指向的焦平面的后部任一个点 沿着接收望远镜的纵向轴线接收望远镜。 由于最大可能接收功率焦平面内的焦点来实现，任何运动从沿接收望远镜的纵向轴线的焦点接收光纤远将导致降低的接收功率的。
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23.发明授权Method of forming integrated optical circuit planar waveguide turning mirrors 有权一种用于在集成光学电路形成平面波导偏转镜方法
公开(公告)号：EP0903596B1
公开(公告)日：2002-03-06
申请号：EP98307240.6
申请日：1998-09-08
CPC分类号： G02B6/122 , G02B6/42 , G02B6/4214 , G02B2006/12104
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公开(公告)号：EP1174759A1
公开(公告)日：2002-01-23
申请号：EP01300517.8
申请日：2001-01-22
CPC分类号： G02F1/3517 , G02F3/00 , G02F2203/70 , H04K1/02 , H04L9/065
摘要： An optical device for performing at least one Boolean logic operation. The optical device has at least a first and a second input signal and at least one output signal. The optical device includes at least one interferometer for receiving the at least a first and second input signals. The device also has at least one optical amplifier for creating a phase difference between the first and second inputs to generate the output signal to perform at least one Boolean logic operation.
摘要翻译： 一种用于执行至少一个布尔逻辑运算的光学装置。 光学装置具有至少第一和第二输入信号和至少一个输出信号。 光学装置包括用于接收至少第一和第二输入信号的至少一个干涉仪。 该装置还具有至少一个光放大器，用于在第一和第二输入之间产生相位差，以产生输出信号以执行至少一个布尔逻辑运算。
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25.发明公开Method and apparatus for communication signal autotracking in a free space optical transmission system 有权在einem optischenFreiraumübertragungssystem的Verfahren und Vorrichtung zurÜbertragungssignalnachführung
公开(公告)号：EP1154591A2
公开(公告)日：2001-11-14
申请号：EP01303494.7
申请日：2001-04-17
IPC分类号： H04B10/10
CPC分类号： H04B10/1121 , H04B10/118
摘要： A free space optical communication system is disclosed whereby the signal amplitude incident upon a receive optical fiber of a receive telescope is varied by dithering either the light beam transmitted by a transmit telescope or the receive optical fiber when a decrease in received signal amplitude is measured so as to effect the incidence of the maximum transmitted signal amplitude upon the receive optical fiber at the receive focal plane. In one embodiment, the transmit optical fiber is dithered in a pattern, causing the transmitted beam to oscillate in a corresponding pattern. In response, the received signal amplitude of the image on the focal plane of the receive telescope also oscillates in the same pattern. By comparing the phase of the received signal with the phase of the movement of the transmitted beam, the origin of the transmitted beam dithering pattern can be moved until the maximum amplitude of the transmitted beam is incident upon the receive optical fiber. In another embodiment, the receive optical fiber is dithered in a variable pattern to locate the point of maximum received signal amplitude. Using the aforementioned phase comparison technique, the receive optical fiber is moved progressively closer to the point of maximum amplitude of the received signal on the receive focal plane. In cases where atmospheric disturbances alter the path of the transmitted beam, the transmitted beam and the receive optical fiber may both be dithered to achieve coincidence between the point of maximum signal amplitude and the receive optical fiber.
摘要翻译： 公开了一种自由空间光通信系统，由此当接收望远镜的接收光纤入射的信号幅度通过抖动由发射望远镜或接收光纤发送的光束而变化，当接收信号幅度的降低被测量时 以便在接收焦平面上对接收光纤实现最大传输信号幅度的入射。 在一个实施例中，发送光纤以图案抖动，使得发射的光束以相应的图案振荡。 作为响应，接收望远镜的焦平面上的图像的接收信号幅度也以相同的图案振荡。 通过将接收信号的相位与发射波束的移动相位进行比较，可以移动发射波束抖动模式的原点，直到发射波束的最大振幅入射到接收光纤上。 在另一个实施例中，接收光纤以可变模式抖动以定位最大接收信号幅度点。 使用上述相位比较技术，接收光纤被逐渐地移动到接收焦平面上接收信号的最大幅度点。 在大气干扰改变发射波束的路径的情况下，发射波束和接收光纤都可以被抖动以实现最大信号幅度点与接收光纤之间的一致。
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26.发明公开
公开(公告)号：EP0844502A1
公开(公告)日：1998-05-27
申请号：EP97307920.5
申请日：1997-10-07
CPC分类号： G02B6/2555 , G02B6/2551 , G02B6/30 , G02B6/422 , G02B6/4227
摘要： Measuring and setting techniques for relative component (50 and 55) orientations and separations is accomplished by projecting a coherent light beam into one end of a gap (60) formed between facing surfaces (52,57) of adjacent components. This light beam projection causes a corresponding light ray pattern to be projected out of an opposite end of the gap. The arrangement of light rays in the resulting pattern (30) is indicative of the relative positions of, and distance between, the facing surfaces. Such a projected pattern is used for determining the relative positions between adjacent components, alone, or as feedback for adjusting such component positions to achieve a desired orientation and/or separation distance between the components.
The light ray pattern (30) projected on the detector (10) is produced by one or a combination of (1) reflection of the light beam (25) from the respective surfaces (52) and (57), (2) portions of the light beam (25) that travel trough the gap unhindered, i.e., not reflected by the facing surfaces (52 and 57), and (3) light diffraction. Typically, the projected pattern (30) includes at least one primary region of light intensity caused by reflection and/or unhindered portions of the light beam (25) superimposed over secondary regions of varying light intensities caused by diffraction of the light beam (25).摘要翻译： 通过将相干光束投射到形成在相邻部件的相对表面（52,57）之间的间隙（60）的一端来实现相对分量（50和55）取向和分离的测量和设置技术。 该光束投影使相应的光线图案从间隙的相对端突出。 所得到的图案（30）中的光线的布置指示相对表面之间的相对位置和距离。 这种投影图案被用于单独地确定相邻部件之间的相对位置，或者用作用于调整这些部件位置以获得部件之间的期望取向和/或间隔距离的反馈。 投射在检测器（10）上的光线图案（30）通过（1）来自各个表面（52）和（57）的光束（25）的反射的一个或组合来产生，（2） 光束（25）不受阻碍地沿着间隙行进，即不被相对表面（52和57）反射，和（3）光衍射。 通常，投影图案（30）包括由光束（25）的衍射引起的变化的光强度的二次区域上叠加的光束（25）的反射和/或不受阻挡部分引起的光强度的至少一个主要区域， 。
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公开(公告)号：EP0826988A2
公开(公告)日：1998-03-04
申请号：EP97306297.9
申请日：1997-08-19
IPC分类号： G02B6/12
CPC分类号： G02B6/124 , G02B6/12007 , G02B2006/12107 , G02B2006/12109
摘要： An optical planar waveguide notch filter employs a waveguide with first, second and third regions. The first and third regions have structures for propagating an optical signal in a first transmission mode. The second region is located between the first and third regions and has a structure in which an optical signal propagates in the first transmission mode as well as at least one other higher order transmission mode. The structure of the second region further couples a particular wavelength band of the signal propagating in the first transmission mode to at least one of the other transmission modes. This coupling causes an attenuation of energy of such bandwidth in the signal propagating in the first transmission mode. As a result, the signal propagating from the second region to the third region in the first transmission mode is a notch filtered signal possessing an attenuation at the particular wavelength band.
摘要翻译： 光学平面波导陷波滤波器采用具有第一，第二和第三区域的波导。 第一和第三区域具有以第一传输模式传播光信号的结构。 第二区域位于第一和第三区域之间，并且具有其中光信号以第一传输模式以及至少一个其它高阶传输模式传播的结构。 第二区域的结构还将在第一传输模式中传播的信号的特定波长带耦合到其它传输模式中的至少一个。 该耦合导致在第一传输模式中传播的信号中这种带宽的能量衰减。 结果，在第一传输模式中从第二区域传播到第三区域的信号是在特定波段具有衰减的陷波滤波信号。
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28.发明公开Method and apparatus for automatic tracking of an optical signal in a wireless optical communication system 有权用于将光信号的在无线光通信系统中的自动跟踪方法和装置
公开(公告)号：EP1130808A3
公开(公告)日：2002-07-31
申请号：EP01301454.3
申请日：2001-02-19
IPC分类号： H04B10/10
CPC分类号： H04B10/1121
摘要： A method and apparatus are disclosed for aligning and maintaining the alignment of the transmitting unit and the receiving unit in an optical wireless communication system. The receiving unit includes an optical bundle positioned at the focal point of an objective optic element. The optical bundle is comprised of an array of optical fibers, arranged surrounding the receiving fiber. The receiving unit also includes a number of detectors that measure the optical signal strength on a corresponding fiber in the optical bundle. The array of fibers is used to detect the location of the received signal relative to the receiving optical fiber and to provide feedback to adjust the orientation of the optical bundle to optimize the received signal strength. When misalignment occurs between the received signal and the receiving fiber, some of the incident received signal will be captured by one or more of the outer optical fibers. The amplitude of each of the generated signals are then compared to each other, thereby giving a direction in which to drive the optical bundle back into alignment with the received signal. The present invention provides automatic tracking using the information-carrying optical signal, without the need for a separate laser.
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29.发明公开Point-to-multipoint free-space wireless optical communication system 审中-公开抽烟者选择Punkt-zu-MehrpunktÜbertragungssystemim freien Raum
公开(公告)号：EP1202474A1
公开(公告)日：2002-05-02
申请号：EP01308076.7
申请日：2001-09-24
IPC分类号： H04B10/10
CPC分类号： H04B10/1121
摘要： A free-space wireless optical communication system is disclosed that utilizes a telescope design (300) having aspherical mirrors (310,320), such as a Ritchey-Chretien (RC) telescope. RC telescopes are characterized by a concave primary mirror (310) and a convex secondary mirror (320) each having a hyperbolic shape. The disclosed mirror configuration provides a larger focal plane that allows for automatic alignment between a transmitter and receiver with a stationary or fixed mirror design, further contributing to a lower fabrication cost. Among other benefits, the larger focal plane permits an n x n fiber array (350) to be positioned in the focal plane (330) of the RC optical telescope, thereby enabling point-to-multipoint communications with a single optical telescope. Each fiber in the n x n fiber array of a transmitting telescope can be focused on a different receiving telescope in a wireless optical communication system. In this manner, each fiber in the n x n fiber array sends optical energy over a distinct path to address a given receiving telescope. Likewise, for a multipoint-to-point communication system, an n x n fiber array can be positioned in the focal plane (330) of the RC optical receiving telescope, with each fiber in the n x n fiber array receiving optical energy over a distinct path from a given transmitting telescope. A number of fabrication techniques are also disclosed that permit the optical telescopes of the present invention to be fabricated at a reasonable cost that permits such optical telescopes to be deployed in wireless optical communication systems.
摘要翻译： 公开了一种利用具有诸如Ritchey-Chretien（RC）望远镜的非球面镜（310,320）的望远镜设计（300）的自由空间无线光通信系统。 RC望远镜的特征在于具有双曲面形状的凹形主镜（310）和凸形副镜（320）。 所公开的反射镜配置提供了更大的焦平面，其允许具有静止或固定镜设计的发射器和接收器之间的自动对准，进一步有助于降低制造成本。 除了其他优点之外，较大的焦平面允许n×n光纤阵列（350）定位在RC光学望远镜的焦平面（330）中，从而实现与单个光学望远镜的点对多点通信。 发射望远镜的n×n光纤阵列中的每个光纤可以聚焦在无线光通信系统中的不同的接收望远镜上。 以这种方式，n×n光纤阵列中的每个光纤在不同的路径上发送光能以寻址给定的接收望远镜。 类似地，对于多点对点通信系统，nxn光纤阵列可以被定位在RC光接收望远镜的焦平面（330）中，其中nxn光纤阵列中的每个光纤在与...的不同路径上接收光能 给定发射望远镜。 还公开了许多制造技术，其允许以合理的成本制造本发明的光学望远镜，其允许将这种光学望远镜部署在无线光通信系统中。
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30.发明公开Telescope for a free-space wireless optical communication system 审中-公开Teleskopfürdrahtlose optische Kommunication im freien Raum
公开(公告)号：EP1199822A2
公开(公告)日：2002-04-24
申请号：EP01308074.2
申请日：2001-09-24
CPC分类号： H04B10/1121 , G02B17/061
摘要： A free-space wireless optical communication system is disclosed that utilizes a telescope design having aspherical mirrors, such as a Richey-Chetrien (RC) telescope. RC telescopes are characterized by a concave primary mirror and a convex secondary mirror each having a hyperbolic shape. The mirror configuration of the present invention allows the primary and secondary mirrors to be positioned closer together than conventional designs, allowing for a very compact system. The disclosed mirrors can be thin and lightweight, allowing for a lightweight telescope unit. The mirror configuration of the present invention provides a larger focal plane, allowing for automatic alignment between a transmitter and receiver with a stationary or fixed mirror design, further contributing to a lower fabrication cost, and can be fabricated with large diameters, allowing the transmission of high beam intensities at eye-safe levels since the energy is spread over a large area. A number of fabrication techniques are disclosed that permit the optical telescopes of the present invention to be fabricated at a reasonable cost that permits such optical telescopes to be deployed in wireless optical communication systems.
摘要翻译： 公开了一种利用具有非球面镜的望远镜设计的自由空间无线光通信系统，例如Ritchey-Chrétien（RC）望远镜。 RC望远镜的特征在于具有双曲面形状的凹形主镜和凸形副镜。 本发明的镜子配置允许主镜和副镜与传统设计相比定位得更靠近，允许非常紧凑的系统。 所公开的反射镜可以是薄且轻的，允许轻型望远镜单元。 本发明的镜子结构提供了一个更大的焦平面，允许在具有静止或固定镜面设计的发射器和接收器之间进行自动对准，进一步有助于降低制造成本，并且可以制造成具有大直径，允许 远光强度在眼睛安全的水平，因为能量分布在大面积上。 公开了许多制造技术，其允许以合理的成本制造本发明的光学望远镜，其允许将这种光学望远镜部署在无线光通信系统中。
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