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公开(公告)号：US4557552A
公开(公告)日：1985-12-10
申请号：US323037
申请日：1981-11-19
CPC分类号： G02B6/4201 , G02B6/2861 , G02B6/4287 , Y10S359/90
摘要： A fiber optic tapped delay line is disclosed in which a number of bends in a single optical fiber are formed to obtain taps of an optical signal traveling in that fiber at each bend location. Light removed at the bends is directed to a focusing lens, which focuses the light onto a photodetector acting as a summing device to produce a frequency-filtered output of the light signal traveling in the fiber. The device's response as a transversal filter is enhanced by weighting the taps either by use of a cylindrical lens, or by selectively masking a portion of light emitted by selected individual taps.
摘要翻译： 公开了一种光纤抽头延迟线，其中形成单个光纤中的多个弯曲以获得在每个弯曲位置处在该光纤中行进的光信号的抽头。 在弯曲处去除的光被引导到聚焦透镜，聚焦透镜将光聚焦到用作求和装置的光电检测器上，以产生在光纤中行进的光信号的频率滤波输出。 作为横向滤波器的装置的响应通过使用柱面透镜加权抽头或者通过选择性地掩蔽由选定的各个抽头发射的光的一部分来增强。
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公开(公告)号：US4495656A
公开(公告)日：1985-01-22
申请号：US417506
申请日：1982-09-13
CPC分类号： H04B10/00 , G02B6/2861
摘要： A digital word generator uses a tap fiber optic delay line to generate a sequence of pulses. The pulses are weighted and combined to produce a digital word.
摘要翻译： 数字字发生器使用抽头光纤延迟线来产生脉冲序列。 脉冲被加权并组合以产生数字字。
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3.发明授权Method and apparatus for measuring the thickness of a film using low coherence reflectometry 失效使用低相干反射测量薄膜厚度的方法和装置
公开(公告)号：US5642196A
公开(公告)日：1997-06-24
申请号：US520199
申请日：1995-08-28
CPC分类号： G01B11/06
摘要： An apparatus and method for measuring the thickness of a film having top and bottom surfaces. The apparatus includes a first coupler for generating a first probe light signal and a second probe light signal from a low coherence light source. The first probe light signal is directed toward the top surface of the film and the light leaving the top surface of the film is collected. Similarly, the second probe light signal is directed toward the bottom surface of the film and the light leaving the bottom surface of the film is also collected. Top and bottom partially reflecting reference surfaces are provided for generating reflections. The top reference surface reflects part of the light leaving the top surface back toward the top surface, and the bottom reference surface reflects light leaving the bottom surface of the film back toward the bottom surface of the film. The collected light is combined to form a collected light signal which is input to a receiver that determines the time delay between light reflected from the top surface of the film and the top reference surface and between the bottom surface of the film and the bottom reference surface. In the preferred embodiment of the present invention, the receiver is constructed from an optical autocorrelator or an optical spectrum analyzer that includes circuitry for providing the Fourier transform of the frequency domain spectrum measured from the collected light signal.
摘要翻译： 一种用于测量具有顶表面和底表面的膜的厚度的装置和方法。 该装置包括用于产生第一探针光信号的第一耦合器和来自低相干光源的第二探测光信号。 第一探针光信号指向膜的顶表面，并且收集离开膜的顶表面的光。 类似地，第二探针光信号指向膜的底表面，并且还收集离开膜的底表面的光。 提供顶部和底部部分反射的参考表面用于产生反射。 顶部参考表面反射离开顶部表面的光的一部分朝向顶部表面，并且底部参考表面将离开膜的底部表面的光反射回到膜的底部表面。 收集的光被组合以形成收集的光信号，其被输入到接收器，该接收器确定从膜的顶表面反射的光与顶部参考表面之间以及在膜的底表面和底部参考表面之间的时间延迟 。 在本发明的优选实施例中，接收机由光学自相关器或光谱分析仪构成，光谱分析仪包括用于提供从收集的光信号测量的频域频谱的傅里叶变换的电路。
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公开(公告)号：US4479701A
公开(公告)日：1984-10-30
申请号：US326215
申请日：1981-12-01
CPC分类号： G02B6/29338 , G02B6/2821 , G02B6/2861 , G02B6/29332
摘要： A fiber optic recirculating memory is disclosed which utilizes dual couplers to form a splice-free recirculating memory device from a length of single mode optical fiber forming a loop which acts as a delay line and a second length of single mode optical fiber which provides an input end and an output end for the device. A single signal supplied as an input to the device will result in a series of output signals identical to the input signal, although at smaller, decreasing amplitudes; the invention prevents the first output signal from being substantially larger than the rest of the output signals, thus eliminating the need for protective circuitry on the output end or the rejection of the first output signal. In addition to being useful as a recirculating memory device for use in a system where data is generated at a rate faster than it can be accepted by a data processor, the invention may be used as a tap filter to pass a selected fundamental frequency and its harmonics, and to attenuate all other frequencies.
摘要翻译： 公开了一种光纤再循环存储器，其利用双耦合器从一单一模式光纤的长度形成无拼接的循环存储器件，该单模光纤形成用作延迟线的环路和第二长度的单模光纤，其提供输入 端和输出端。 作为输入到设备的单个信号将产生与输入信号相同的一系列输出信号，尽管幅度较小，幅度较小。 本发明防止第一输出信号显着地大于其余的输出信号，从而消除了在输出端上对保护电路的需要或第一输出信号的抑制。 除了用作在数据以比数据处理器可以接受的速度更快的速度生成数据的系统中有用的本发明之外，本发明可以用作抽头滤波器以通过选定的基频，并且其 谐波，并衰减所有其他频率。
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公开(公告)号：US5000568A
公开(公告)日：1991-03-19
申请号：US415438
申请日：1989-09-28
IPC分类号： G01M11/00
CPC分类号： G01M11/3118
摘要： An optical time domain reflectometer that injects at least two complementary code sequences into an optical fiber and detects the return signal produced by each of these code sequences. These return signals are processed to extract the function h.sub.k that is equal to the response function for the fiber when a single pulse is injected into the fiber. This processing utilizes a correlation scheme that has no sidelobe distortion. Various combinations of Golay codes are suitable for use as the complementary codes.
摘要翻译： 光时域反射计，其将至少两个互补码序列注入到光纤中，并检测由这些码序列中的每一个产生的返回信号。 处理这些返回信号以提取当将单个脉冲注入光纤时等于光纤的响应函数的函数hk。 该处理利用没有旁瓣失真的相关方案。 Golay码的各种组合适合用作互补码。
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公开(公告)号：US4805237A
公开(公告)日：1989-02-14
申请号：US191729
申请日：1988-05-10
申请人： David K. Donald , Shih-Yuan Wang , Tirumala R. Ranganath , Steven A. Newton , William R. Trutna , David M. Bloom , Frank K. David
发明人： David K. Donald , Shih-Yuan Wang , Tirumala R. Ranganath , Steven A. Newton , William R. Trutna , David M. Bloom , Frank K. David
IPC分类号： H04B10/148 , H04B9/00
摘要： A parametric photodiode amplifier suitable for detecting light of frequency f and intensity P and having intersecting I:V curves for zero incident light and for incident light of intensity P. These photodiodes typically have an intrinsic density of carriers that is on the order of or less than the density of carriers produced by incident light of intensity P. When the photodiode is biased by an LO signal and is illuminated with modulated light of carrier frequency f, the photodiode output signal contains IF components at the difference between the frequencies of the modulation signal and the frequencies of on the order of the 23 lower harmonics of the LO signal.
摘要翻译： 适用于检测频率f和强度P的光的参数光电二极管放大器，对于零入射光和强度为P的入射光具有相交的I：V曲线。这些光电二极管通常具有等于或小于 比由强度P的入射光产生的载流子的密度。当光电二极管被LO信号偏置并被载波频率f的调制光照射时，光电二极管输出信号包含调制信号的频率之间的差分的IF分量 以及LO信号的23个低次谐波的次数的频率。
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公开(公告)号：US4652079A
公开(公告)日：1987-03-24
申请号：US527163
申请日：1983-08-26
申请人： Herbert J. Shaw , Steven A. Newton
发明人： Herbert J. Shaw , Steven A. Newton
CPC分类号： G02B6/264 , G02B6/2861 , H03K3/86 , Y10S359/90
摘要： There is disclosed a high speed pulse train generator for generating a train of pulses having arbitrarily close spacing. The apparatus consists of a generator loop comprised of a fiber optic waveguide looped through a directional coupler with the output fiber serving as the input fiber for a similarly structured multiplexer loop. The lengths of the two loops are adjusted such that the time difference in the propagation times of light around the respective loops is small compared to the time of propagation around either loop. The times are adjusted to obtain any arbitrary spacing of the pulses in the output pulse train which is comprised of interleaved pulse trains resulting from each pulse input to the multiplexer loop. Also disclosed is a single loop embodiment for bidirectional data rate transformation and methods of using all the embodiments.
摘要翻译： 公开了一种高速脉冲串发生器，用于产生具有任意紧密间隔的脉冲串。 该装置包括一个发生器回路，该发生器回路包括一个通过定向耦合器环绕的光纤波导，输出光纤用作类似结构的多路复用器回路的输入光纤。 调整两个环路的长度，使得相对于各个环路周围的光的传播时间的时间差与围绕任一环路的传播时间相比较小。 调整时间以获得输出脉冲串中的脉冲的任意间隔，其由输入到多路复用器环路的每个脉冲产生的交错脉冲串组成。 还公开了用于双向数据速率变换的单回路实施例和使用所有实施例的方法。
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公开(公告)号：US4558920A
公开(公告)日：1985-12-17
申请号：US323038
申请日：1981-11-19
申请人： Steven A. Newton , John E. Bowers
发明人： Steven A. Newton , John E. Bowers
CPC分类号： G02B6/12007 , G02B6/2826 , G02B6/283 , G02B6/2861 , G02B6/29332 , G02B6/4215 , Y10S359/90
摘要： A fiber optic tapped delay line is disclosed which has a number of taps simultaneously fabricated in a single length of optical fiber. The light output from each tap is detected by either an electronic photodetector or by an output segment of optical fiber having a lapped surface, the latter technique also being utilizable in the mass production of optical couplers. The device may be used as a transversal filter by summing the outputs from the taps, and the frequency passband may be custom-tailored by selectively weighting the outputs from individual taps.
摘要翻译： 公开了一种光纤抽头延迟线，其具有在单个长度的光纤中同时制造的多个抽头。 来自每个分接头的光输出由电子光电检测器或具有重叠表面的光纤的输出段检测，后一种技术也可用于大量生产光耦合器。 该装置可以通过对来自抽头的输出进行求和来作为横向滤波器，并且频率通带可以通过对来自各个抽头的输出进行选择性加权来定制。
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公开(公告)号：US4511207A
公开(公告)日：1985-04-16
申请号：US416667
申请日：1982-09-10
申请人： Steven A. Newton , John E. Bowers
发明人： Steven A. Newton , John E. Bowers
CPC分类号： G02B6/264 , G02B6/2821 , G02B6/2826 , G02B6/283 , G02B6/2861 , G02B6/29332 , G02B6/4215 , H04B10/2504 , Y10S359/90
摘要： A fiber optic data distributor utilizes a one-by-n single mode optical fiber directional coupler to distribute data from a single fiber to a plurality of separate fibers. The separate fibers may supply data from a central processing unit to peripheral units, which may also input data to the separate fibers for transmission to the central processing unit.
摘要翻译： 光纤数据分配器利用一个单模光纤定向耦合器将数据从单个光纤分配到多个单独的光纤。 单独的光纤可以将数据从中央处理单元提供给外围单元，外围单元也可以将数据输入到单独的光纤以传输到中央处理单元。
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公开(公告)号：US20090113183A1
公开(公告)日：2009-04-30
申请号：US11933189
申请日：2007-10-31
申请人： Lee A. BARFORD , Steven A. NEWTON
发明人： Lee A. BARFORD , Steven A. NEWTON
IPC分类号： G06F9/22
CPC分类号： G06F11/24
摘要： A method of controlling at least one device is disclosed. The method includes providing the device with at least one constraint for carrying out an operation. The device determines if the constraint can be met. If it is determined that the constraint can be met, the device determines on its own accord a manner to get into a state wherein the constraint will be met. The device then goes into the state in the determined manner. A device that is controlled by the method and a system including such a device are also disclosed.
摘要翻译： 公开了一种控制至少一个装置的方法。 所述方法包括向所述设备提供用于执行操作的至少一个约束。 该设备确定是否可以满足约束。 如果确定可以满足约束，则设备自身确定进入其中将满足约束的状态。 然后，设备以确定的方式进入状态。 还公开了由该方法控制的装置和包括这种装置的系统。
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