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21. 发明授权

US4741586A Dynamic coupler using two-mode optical waveguides 失效
标题翻译：使用双模光波导的动态耦合器
公开(公告)号：US4741586A
公开(公告)日：1988-05-03
申请号：US17762
申请日：1987-02-20
申请人： Byoung Y. Kim , Herbert J. Shaw
发明人： Byoung Y. Kim , Herbert J. Shaw
IPC分类号： G02B6/14 , G02B6/34 , G02F1/35 , H04B10/2569 , G02B6/26
CPC分类号： H04B10/2569 , G02B6/02047 , G02B6/14 , G02B6/4215 , G02F1/3515 , G02B6/2931 , G02B6/29311 , G02B6/29344 , Y10S359/90
摘要： An optical mode coupling apparatus includes an optical waveguide that couples an optical signal from one propagation mode of the waveguide to a second propagation mode of the waveguide. The optical signal propagating in the waveguide has a beat length, and the coupling apparatus includes a source of perturbational light signal that propagates in the waveguide in two spatial propagation modes having different propagation constants so as to have a perturbational signal beat length. The perturbational signal has an intensity distribution in the waveguide that causes periodic perturbations in the refractive indices of the waveguide in accordance with the perturbational signal beat length. The periodic perturbations of the refractive indices of the optical waveguide cause cumulative coupling of the optical signal from one propagation mode to another propagation mode. The perturbational light signal can be selectively enabled and disabled to selectively enable and disable coupling of the optical signal between the propagation modes.
摘要翻译：光学模式耦合装置包括将光信号从波导的一个传播模式耦合到波导的第二传播模式的光波导。在波导中传播的光信号具有拍子长度，并且耦合装置包括在具有不同传播常数的两个空间传播模式下在波导中传播的扰动光信号源，以便具有扰动信号拍子长度。扰动信号在波导中具有根据扰动信号拍子长度导致波导的折射率的周期性扰动的强度分布。光波导的折射率的周期扰动导致光信号从一种传播模式到另一传播模式的累积耦合。扰动光信号可以选择性地启用和禁用，以选择性地启用和禁用光信号在传播模式之间的耦合。

22. 发明授权

US4728192A Gated fiber optic rotation sensor with extended dynamic range 失效
标题翻译：门控光纤旋转传感器具有更大的动态范围
公开(公告)号：US4728192A
公开(公告)日：1988-03-01
申请号：US581304
申请日：1984-02-17
申请人： Herbert J. Shaw , Byoung Y. Kim
发明人： Herbert J. Shaw , Byoung Y. Kim
IPC分类号： G01C19/72 , G01C19/64
CPC分类号： G01C19/726
摘要： A fiber optic rotation sensor, employing the Sagnac effect comprising all fiber optic components positioned along a continuous, uninterrupted strand of fiber optic material. The rotation sensor includes a detection system utilizing a modulator or modulators for phase modulating at first and second frequencies light waves which counter-propagate through a loop formed in the fiber optic strand. The second modulation frequency is much lower than the first frequency. An output signal from the sensor is gated synchronously with respect to the phase modulation at the second frequency so that the detected optical output signal is provided only during selected intervals of the phase modulation at the second frequency.A phase sensitive detector generates a feedback error signal proportional to the magnitude of the optical output signal at the first phase modulation frequency. The feedback error signal controls a modulator which controls the amplitude of the second frequency driving signal for the phase modulator such that the signal at the first phase modulation frequency in the output signal from the rotation sensor is substantially cancelled by the phase difference modulation produced at the second modulation frequency during the interval when the optical output signal is present.
摘要翻译：一种光纤旋转传感器，采用Sagnac效应，其包括沿连续的不间断的光纤材料股定位的所有光纤部件。旋转传感器包括利用调制器或调制器的检测系统，用于在第一和第二频率处对通过形成在光纤链中的环路进行反向传播的光波进行相位调制。第二调制频率比第一频率低很多。来自传感器的输出信号相对于第二频率处的相位调制同步地进行门控，使得仅在第二频率的相位调制的选定间隔期间提供检测到的光输出信号。相敏检测器产生与第一相位调制频率处的光输出信号幅度成比例的反馈误差信号。反馈误差信号控制调制器，该调制器控制相位调制器的第二频率驱动信号的幅度，使得来自旋转传感器的输出信号中的第一相位调制频率处的信号基本上被在在存在光输出信号的间隔期间的第二调制频率。

23. 发明授权

US4938556A Superfluorescent broadband fiber laser source 失效
标题翻译：超荧光宽带光纤激光源
公开(公告)号：US4938556A
公开(公告)日：1990-07-03
申请号：US281088
申请日：1988-12-07
申请人： Michel J. F. Digonnet , Karen Liu , Byoung Y. Kim , Herbert J. Shaw , John J. Fling
发明人： Michel J. F. Digonnet , Karen Liu , Byoung Y. Kim , Herbert J. Shaw , John J. Fling
IPC分类号： H01S3/067 , H01S3/0933 , H01S3/094 , H04B10/17 , H04J14/02
CPC分类号： H04B10/2912 , H01S3/0933 , H01S3/094003 , H04B10/291 , H04J14/02 , H01S3/06787 , H01S3/094011
摘要： A superfluorescent broadband fiber laser source comprises a fiber doped with laser material coupled to a multiplexing coupler. In the preferred embodiment, a source of pumping illumination provides pumping light to the doped fiber, and the coupler is adjusted to have a 0% coupling efficiency at the wavelength of the source. The pumping light is sufficiently intense to produce amplified spontaneous emission within the doped fiber, and gives rise to a forward signal and a backward signal. One of the superfluorescent signals is reflected back to the doped fiber by a reflector cemented to one end of the doped fiber or to one end of another fiber through the coupling function of the coupler. The coupler is adjusted to provide complete coupling at the frequency of the lasing light. The temperature dependence of the coupler can be selected to reduce or cancel the temperature dependence of the superfluorescent signal. Other arrangements utilizing the multiplexing properties of the coupler are also described. An all-fiber reflector can also be used.

24. 发明授权

US4836676A Phase reading fiber optic interferometer 失效
标题翻译：相位读取光纤干涉仪
公开(公告)号：US4836676A
公开(公告)日：1989-06-06
申请号：US946628
申请日：1986-12-29
申请人： Byoung Y. Kim , Herbert J. Shaw
发明人： Byoung Y. Kim , Herbert J. Shaw
IPC分类号： G01C19/72
CPC分类号： G01C19/72
摘要： A system and method for detecting the influence of selected forces on an interferometer over an extended dynamic range. One presently preferred embodiment is disclosed for detecting rotation of an interferometer. In this embodiment, an open-loop, all-fiber-optic gyroscope provides an output signal comprising the phase difference of two light waves which are counterpropagating within the gyroscope, and which are phase modulated at a selected frequency. The phase difference of the light waves is influenced by the rotation rate of the interferometer. The output signal is amplitude modulated at the phase modulation frequency to transpose the optical phase shift into a low frequency electronic phase shift, which is measured using a digital time interval counter. A linear scale factor is achieved through use of this system and method.
摘要翻译：一种用于在扩展动态范围内检测所选力对干涉仪的影响的系统和方法。公开了一种目前优选的实施例，用于检测干涉仪的旋转。在该实施例中，开环全光纤陀螺仪提供包括在陀螺仪内相反传播的两个光波的相位差并且以所选频率进行相位调制的输出信号。光波的相位差受到干涉仪的旋转速度的影响。输出信号以相位调制频率进行幅度调制，以将光相位转换成低频电子相移，其使用数字时间间隔计数器测量。通过使用该系统和方法实现线性比例因子。

25. 发明授权

US5546484A Fiber optic switch using polished-type directional coupler 失效
标题翻译：光纤开关采用抛光式定向耦合器
公开(公告)号：US5546484A
公开(公告)日：1996-08-13
申请号：US453540
申请日：1995-05-25
申请人： John J. Fling , Herbert J. Shaw , Michel J. Digonnet , Narinder S. Kapany
发明人： John J. Fling , Herbert J. Shaw , Michel J. Digonnet , Narinder S. Kapany
IPC分类号： G02B6/28 , G02B6/26 , G02B6/42
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。

26. 发明授权

US5082349A Bi-domain two-mode single crystal fiber devices 失效
标题翻译：双域双模单晶光纤器件
公开(公告)号：US5082349A
公开(公告)日：1992-01-21
申请号：US541091
申请日：1990-06-20
申请人： Amado Cordova-Plaza , Herbert J. Shaw
发明人： Amado Cordova-Plaza , Herbert J. Shaw
IPC分类号： G02F1/035 , G02F1/377
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。

27. 发明授权

US4986624A Optical fiber evanescent grating reflector 失效
标题翻译：光纤瞬逝光栅反射器
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
IPC分类号： G02B6/14 , G02B6/34
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。

28. 发明授权

US4778237A Single-mode fiber optic saturable absorber 失效
标题翻译：单模光纤可饱和吸收器
公开(公告)号：US4778237A
公开(公告)日：1988-10-18
申请号：US618032
申请日：1984-06-07
申请人： Wayne V. Sorin , Robert C. Youngquist , Cassius C. Cutler , Herbert J. Shaw
发明人： Wayne V. Sorin , Robert C. Youngquist , Cassius C. Cutler , Herbert J. Shaw
IPC分类号： G02B5/00 , G02B6/00 , G02B6/26 , G02B6/28 , G02F1/17 , G02F1/35 , G02F2/00 , G02F2/02
CPC分类号： G02B6/266 , G02B6/2821 , G02B6/2826 , G02B6/2861 , G02F1/3523
摘要： A fiber optic saturable absorber for processing optical signals comprises an optical fiber from which a portion of the cladding is removed to form a facing surface. A light-absorbing substance having non-linear light-absorbing characteristics is applied to the facing surface such that a portion of the optical signal energy is transferred from the fiber to the substance where it is absorbed. The device selectively attenuates the optical signal and noise, and can be used to reduce pulse waveform distortion caused by pulse broadening and by amplification of system noise.
摘要翻译：用于处理光信号的光纤可饱和吸收器包括光纤，其中去除了包层的一部分以形成面对表面。具有非线性光吸收特性的光吸收物质被施加到相对表面，使得光信号能量的一部分从纤维转移到被吸收的物质。该器件选择性地衰减光信号和噪声，可用于减少由脉冲展宽和系统噪声放大引起的脉冲波形失真。

29. 发明授权

US4773758A Sensor using fiber interferometer 失效
标题翻译：传感器采用光纤干涉仪
公开(公告)号：US4773758A
公开(公告)日：1988-09-27
申请号：US900768
申请日：1986-08-27
申请人： Herbert J. Shaw
发明人： Herbert J. Shaw
IPC分类号： G01D5/353 , G01H9/00 , G01J9/02 , G01B9/02
CPC分类号： G01H9/004 , G01D5/35303 , G01J9/02 , G01J2009/0226
摘要： A closed loop optical fiber interferometer is used in sensing a quantity, Q, by applying a time varying or modulated measure of, Q, asymmetrically to the closed loop (24) and detecting phase shift between two counterpropagating optical signals in the closed loop. The closed loop (24) can be used as the sensing element or a separate sensor (68, 70) can develop a time varying signal which is then applied to the closed loop interferometer.
摘要翻译：闭环光纤干涉仪用于通过对闭环（24）不对称地应用时变或调制测量Q来检测数量Q，并检测闭环中两个反向传播光信号之间的相移。闭环（24）可以用作感测元件，或者单独的传感器（68,70）可以产生随后施加到闭环干涉仪的时变信号。

30. 发明授权

US4495656A Fiber optic word generator 失效
标题翻译：光纤字发生器
公开(公告)号：US4495656A
公开(公告)日：1985-01-22
申请号：US417506
申请日：1982-09-13
申请人： Herbert J. Shaw , Steven A. Newton , John E. Bowers , Kenneth P. Jackson
发明人： Herbert J. Shaw , Steven A. Newton , John E. Bowers , Kenneth P. Jackson
IPC分类号： G02B6/00 , G02B6/28 , G06F5/00 , H04B10/00 , H04B9/00
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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