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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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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：US4676585A
公开(公告)日：1987-06-30
申请号：US637042
申请日：1984-07-09
CPC分类号： G02B6/2861 , G02B6/2821 , G02B6/2826 , G02B6/283 , Y10S359/90
摘要： A continuously variable optical delay line having a first substrate (66, 70) and a second substrate (95). The first substrate is composed of a quartz block (70) with a large radius of curvature along its length, supporting a silicon substrate (66) having a plurality of longitudinal, parallel v-grooves (68). A single length (121) of single mode optical fiber is wrapped around the first substrate (66, 70) in helical fashion with each loop being secured in one of the v-grooves (68). The portions of the fiber (121) in the v-grooves (68) are lapped and polished to create a flat coupling surface extending laterally and longitudinally across the first substrate (66, 70). The second substrate (91) is composed of a quartz block with a single v-groove holding a segment of single mode fiber (95). The radius of curvature of this v-groove is substantially smaller than that of the first substrate, such that the flat coupling surface of the second substrate (91) is shorter than that of the first substrate (66). The first and second substrates are placed together such that the fiber in the second substrate is coupled to the fiber in the first substrate. By moving (142) the second substrate longitudinally with respect to the first substrate, a continuously variable delay can be obtained. The continuously variable delay line can be combined with a separate discretely variable delay line to create a longer continuous variable delay. The continuous variable delay line can be formed with only one v-groove (68) in the first substrate (66).
摘要翻译： PCT No.PCT / US82 / 01609 Sec。 371日期1984年7月9日 102（e）日期1984年7月9日PCT申请日1982年11月12日PCT公布。 出版物WO84 / 02006 日期：1984年5月24日。一种具有第一基板（66,70）和第二基板（95）的连续可变光延迟线。 第一衬底由沿其长度具有大曲率半径的石英块（70）组成，支撑具有多个纵向平行V形槽（68）的硅衬底（66）。 单模光纤的单个长度（121）以螺旋方式缠绕在第一基板（66,70）周围，每个环固定在一个V形槽（68）中。 所述v形槽（68）中的所述纤维（121）的所述部分被研磨和抛光以产生横向和纵向延伸穿过所述第一衬底（66,70）的平坦的联接表面。 第二基板（91）由具有保持单模光纤（95）的单个v形槽的石英块组成。 该v形槽的曲率半径比第一衬底的曲率半径小，使得第二衬底（91）的平坦耦合表面比第一衬底（66）的平坦的耦合表面短。 将第一和第二基板放置在一起，使得第二基板中的光纤耦合到第一基板中的光纤。 通过相对于第一基板纵向移动（142）第二基板，可以获得连续可变的延迟。 连续可变延迟线可以与单独的离散可变延迟线组合以产生更长的连续可变延迟。 连续可变延迟线可以在第一基板（66）中仅形成一个V形槽（68）。
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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：US4723827A
公开(公告)日：1988-02-09
申请号：US628650
申请日：1984-06-19
申请人： Herbert J. Shaw , John E. Bowers
发明人： Herbert J. Shaw , John E. Bowers
CPC分类号： G02B6/2826 , G02B6/283 , G02B6/2861
摘要： A single mode optical fiber switch having a base (70) and a laterally slidable top (91). The base is composed of a quartz block (70) with a slight radius of curvature along its length supporting a silicon substrate (66) having a plurality of parallel v-grooves (68). The grooves are fitted with single mode optical fiber segments (64) and lapped to create a flat coupling surface (82) extending laterally across the base. The top (91) is composed of a quartz block with a single v-groove (93) holding a segment of single-mode fiber (95). This fiber (95) is lapped to create a flat coupling surface matable with the coupling surface on the base. The base (70) and top (91) are placed together such that the top fiber (95) may be selectively slid into and out of coupling alignment with any of the fibers (64) in the base (70) to form a discretely variable delay line. A single length of fiber (121) is wrapped around the base ( 70) in helical fashion with each loop being secured in one of the v-grooves (68). By coupling the top fiber (95) with different loops of the base fibers (121), different amounts of delay can be obtained. The delay line can be used to provide variable frequency response for notch and transversal filters.
摘要翻译： PCT No.PCT / US82 / 01608 Sec。 371日期1984年6月19日 102（e）1984年6月19日PCT PCT卷号1982年11月12日PCT公布。 公开号WO84 / 02005 日期：1984年5月24日。具有基座（70）和横向滑动顶部（91）的单模光纤开关。 基座由石英块（70）组成，石英块（70）沿其长度具有微小的曲率半径，支撑具有多个平行V形槽（68）的硅衬底（66）。 凹槽配有单模光纤段（64）并重叠，以形成横向延伸穿过底座的平坦的耦合表面（82）。 顶部（91）由具有保持单模光纤（95）的单个v形槽（93）的石英块组成。 该纤维（95）被研磨以产生可与基底上的联接表面配合的平坦的联接表面。 基部（70）和顶部（91）被放置在一起，使得顶部纤维（95）可以选择性地滑入和离开与基部（70）中的任何纤维（64）的联接对准，以形成离散变量 延迟线。 单个长度的纤维（121）以螺旋方式围绕基部（70）缠绕，每个环被固定在一个V形槽（68）中。 通过将顶部纤维（95）与基础纤维（121）的不同环耦合，可以获得不同的延迟量。 延迟线可用于为陷波和横向滤波器提供可变频率响应。
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6.发明授权Fiber optic loop interferometer and method with coincident backscatter elimination 失效光纤环路干涉仪和符合反向散射消除的方法
公开(公告)号：US4564293A
公开(公告)日：1986-01-14
申请号：US520605
申请日：1983-08-05
CPC分类号： G01C19/72
摘要： Method and apparatus for improving the sensitivity of Sagnac gyroscopes and other interferometers utilizing a fiber optic loop by minimizing the effects of backscattered radiation. In one disclosed embodiment, the amplitude of coincident backscattered radiation is significantly reduced by applying the light in the form of a pulse of short duration and gating the output so that only the scattered energy from a short length of the fiber contributes to the interfering wave. The interference is reduced even further by processing or constructing the loop to eliminate the scattering sources in the short segment which can give rise to coincident backscattered power.
摘要翻译： 用于通过最小化背散射辐射的影响来提高利用光纤环路的Sagnac陀螺仪和其它干涉仪的灵敏度的方法和装置。 在一个公开的实施例中，通过以短持续时间的脉冲的形式施加光并门控输出，使得只有来自光纤的短长度的散射能量有助于干扰波，才能显着地减少重合后向散射辐射的幅度。 通过处理或构造回路以消除短段中的散射源，甚至可以进一步降低干扰，这可以产生一致的反向散射功率。
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7.发明授权Optical guided wave signal processor for matrix-vector multiplication and filtering 失效光导波信号处理器，用于矩阵矢量乘法和滤波
公开(公告)号：US4588255A
公开(公告)日：1986-05-13
申请号：US503871
申请日：1983-06-13
CPC分类号： G02B6/2861 , G06E3/001
摘要： An array (48, 49, 50, 51) of fiber optic couplers coupling an input (45) and an output (46) waveguide. The output waveguide (46) is routed among the couplers of the array such that either backward or forward coupling exists. With backward coupling, energy coupled into the output waveguide (46) in a coupler of the array is guided back to the preceding coupler for coupling back into the input waveguide (45).The backward coupling allows recirculations to occur between couplers to create poles and zeroes in the transfer function of the array which transfer function can be programmed or tailored somewhat to have specific characteristics. Further, the backward coupling allows the array to be used for matrix-vector multiplication.
摘要翻译： 耦合输入（45）和输出（46）波导的光纤耦合器的阵列（48,49,50,51）。 输出波导（46）在阵列的耦合器之间被路由，使得存在向后或向前耦合。 通过反向耦合，耦合到阵列的耦合器中的输出波导（46）的能量被引导回到先前的耦合器以耦合回到输入波导（45）。 反向耦合允许在耦合器之间发生再循环，以在阵列的传递函数中产生极点和零点，该传递函数可以被编程或稍微修改以具有特定的特性。 此外，反向耦合允许阵列用于矩阵矢量乘法。
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公开(公告)号：US5546484A
公开(公告)日：1996-08-13
申请号：US453540
申请日：1995-05-25
CPC分类号： G02B6/283
摘要： A fiber optic switch module that can be incorporated into switch designs characterized by negligible crosstalk. The switch module is capable of operation over two wavelength bands. A 2.times.2 switch module has an open or bar state in which polished portions of the fiber segments are separated from each other and a closed or cross state where the polished portions are in optical contact with each other. The module has arbitrarily low crosstalk in the bar state, but typically some crosstalk in the cross state. In one embodiment, the third port of a first 2.times.2 module is coupled to the first port a second 2.times.2 module while no connections are-made to the second ports of the modules or to the third port of the second module. Fiber parameters (core radius and numerical aperture) and fabrication parameters (radius of curvature of the fibers in the interaction region and minimum edge-to-edge spacing between the fiber cores) are chosen so that the switch module has high coupling ratio (close to unity) in two distinct wavelength bands.
摘要翻译： 光纤开关模块可以结合在开关设计中，其特征在于可忽略的串扰。 开关模块能够在两个波段上工作。 2×2开关模块具有打开状态或条状状态，其中光纤段的抛光部分彼此分离，并且抛光部分彼此光学接触的封闭或交叉状态。 该模块在条形状态下具有任意低的串扰，但通常在交叉状态下具有一些串扰。 在一个实施例中，第一2x2模块的第三端口耦合到第一端口第二2x2模块，而没有连接到模块的第二端口或第二模块的第三端口。 选择纤维参数（芯半径和数值孔径）和制造参数（纤维在相互作用区域中的曲率半径和最小边缘到边缘间距），以使开关模块具有高耦合比（接近于 统一）在两个不同的波段。
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公开(公告)号：US5082349A
公开(公告)日：1992-01-21
申请号：US541091
申请日：1990-06-20
CPC分类号： G02F1/3775 , G02F1/0353
摘要： A mode converter comprises an a-axis LiNbO.sub.3 optical fiber exhibiting a ferroelectric bi-domain structure. The fiber is subject to an electrical field that induces a +.pi./2 phase retardation in one domain of the fiber and a -.pi./2 phase retardation in the other domain. A light signal launched in the fundamental mode of the fiber is converted into a light signal propagating in the second order mode. When the electrical field is selected so that the phase retardations are not multiples of .pi./2, the mode conversion is partial and the LiNbO.sub.3 fiber can operate as an optical switch or as an amplitude modulator. The mode converter can also be operated as a second harmonic generator. The fiber is heated to a phase matching temperature so that a signal launched in the fundamental mode of the fiber and at a frequency .omega. is converted to the second order mode at a frequency 2.omega.. The LiNbO.sub.3 fiber can also simultaneously operate as an optical switch and as a second harmonic generator. Other non-linear interactions are possible such as sum or difference frequency generation or parametric generation. The various embodiments of the present invention are reciprocal.
摘要翻译： 模式转换器包括呈现铁电双畴结构的a轴LiNbO 3光纤。 纤维经受电场，其在纤维的一个区域中引起+π/ 2相位延迟，并在另一个域中引起a-π/ 2相位延迟。 以光纤的基本模式发射的光信号被转换成以二阶模式传播的光信号。 当选择电场使得相位延迟不是pi / 2的倍数时，模式转换是部分的，并且LiNbO 3光纤可以作为光开关或调幅器工作。 模式转换器也可以作为二次谐波发生器运行。 将光纤加热到相位匹配温度，使得以光纤的基本模式发射的信号以频率ω被转换为频率为2ω的二阶模式。 LiNbO3光纤也可以作为光开关和二次谐波发生器同时工作。 其他非线性相互作用是可能的，例如和或差频产生或参数生成。 本发明的各种实施例是相互的。
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公开(公告)号：US4986624A
公开(公告)日：1991-01-22
申请号：US147095
申请日：1988-01-20
申请人： Wayne V. Sorin , Herbert J. Shaw
发明人： Wayne V. Sorin , Herbert J. Shaw
CPC分类号： G02B6/29334 , G02B6/14
摘要： A periodic grating structure is placed on a facing surface formed on an optical fiber so that the grating structure is within a portion of the evanescent field of an optical signal propagating through the optical fiber. The spatial periodicity of the grating structure is selected to be equal to one-half the propagation wavelength of the optical signal. The grating structure causes the optical signal to be reflected at an angle of 180 degress and thus to propagate in a reverse direction from its original direction of propagation.
摘要翻译： 周期性光栅结构被放置在形成在光纤上的面对表面上，使得光栅结构位于通过光纤传播的光信号的消逝场的一部分内。 选择光栅结构的空间周期等于光信号的传播波长的一半。 光栅结构使得光信号以180度的角度被反射，并因此从其原始的传播方向沿相反的方向传播。
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