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1. 发明授权

US6108086A System and method of stabilizing the scale factor shift in fiber optic gyroscopes using a spectral monitor array 有权
标题翻译：使用光谱监视器阵列稳定光纤陀螺仪的比例因子偏移的系统和方法
公开(公告)号：US6108086A
公开(公告)日：2000-08-22
申请号：US262795
申请日：1999-03-04
申请人： Ronald J. Michal , David M. Rozelle , John P. Rahn
发明人： Ronald J. Michal , David M. Rozelle , John P. Rahn
IPC分类号： G01C19/72
CPC分类号： G01C19/72
摘要： A system and method for providing scale factor stabilization of a broadband light source used in fiber optic gyroscopes is provided. A primary bandpass filter is positioned in the propagation path of the light emitted by the broadband light source to narrow the spectral width of the optical signal transmitted to the fiber optic gyroscope, which reduces the centroid wavelength shift resulting when the broadband light source is exposed to ionizing radiation and other harsh environmental conditions. The filtered optical signal is then passed through the fiber optic gyroscope, where the filter optical signal is processed to measure the amount of rotation of the fiber optic gyroscope. The scale factor stabilization system further includes the spectral monitor array arranged to perform direct optical wavelength measurements of the filtered optical signal to determine whether a scale factor shift in the optical signal has occurred. When a scale factor shift is detected, the detected scale factor shift is used in a compensation algorithm to correct the scale factor of the optical signal. By monitoring the scale factor shift and adjusting the values measured by the fiber optic gyroscope in accordance with the detected scale factor shift, the accuracy of the fiber optic gyro can be improved to a fraction of a part-per-million.
摘要翻译：提供了一种用于提供光纤陀螺仪中使用的宽带光源的比例因子稳定的系统和方法。主要带通滤波器位于由宽带光源发射的光的传播路径中，以窄化传输到光纤陀螺仪的光信号的光谱宽度，这降低了当宽带光源暴露于电离辐射等恶劣环境条件。滤波后的光信号然后通过光纤陀螺仪，其中处理滤波器光信号以测量光纤陀螺仪的旋转量。比例因子稳定系统还包括频谱监视器阵列，其布置成对所滤波的光信号执行直接光波长测量，以确定是否发生了光信号中的比例因子偏移。当检测到比例因子偏移时，在补偿算法中使用检测到的比例因子偏移来校正光信号的比例因子。通过监测比例因子偏移并根据检测到的比例因子偏移调整由光纤陀螺仪测量的值，光纤陀螺仪的精度可以提高到百万分之几。

2. 发明授权

US6025915A Scale factor stabilization of a broadband fiber source used in fiber optic gyroscopes in radiation environments 失效
标题翻译：辐射环境中光纤陀螺仪中使用的宽带光纤源的比例因子稳定性
公开(公告)号：US6025915A
公开(公告)日：2000-02-15
申请号：US104496
申请日：1998-06-25
申请人： Ronald J. Michal , Leo K. Lam , David M. Rozelle
发明人： Ronald J. Michal , Leo K. Lam , David M. Rozelle
IPC分类号： G01C19/72 , H01S3/067
CPC分类号： H01S3/06795 , G01C19/721
摘要： A system for performing scale factor stabilization of a broadband optical signal source used in fiber optic gyroscopes in radiation environments. An optical signal source is provided comprising a pump light source and an optical fiber arranged to receive pump light from the pump light source. Light output from the optical fiber is input into a wavelength division multiplexer. An optical gain fiber having an erbium-doped core is connected to the wavelength division multiplexer and arranged to be optically pumped by the pump light such that the gain fiber emits broadband light that propagates to the wavelength division multiplexer. An output optical fiber is connected to the wavelength division multiplexer and arranged to guide a portion of the broadband light emitted by the gain fiber to a fiber optic gyroscope. A filter device is positioned in-line with the broadband light emitted by the gain fiber to attenuate light outside of the bandwidth of the filter device. The filter device allows a bandwidth of light narrower than the spectral width of the broadband light source to propagate through while attenuating all wavelengths of light outside of its operating bandwidth. Only the portion of the broadband source spectrum contained within the bandpass of the filter is selected out, thus narrowing the spectral width of the broadband fiber source. This narrower spectral width reduces the shift of centroid wavelength of the broadband fiber source which results when the gain fiber and other sensitive optical components are exposed to ionizing radiation.
摘要翻译：用于在辐射环境中用于光纤陀螺仪的宽带光信号源进行比例因子稳定的系统。提供了一种光信号源，其包括泵浦光源和布置成从泵浦光源接收泵浦光的光纤。从光纤输出的光输入到波分多路复用器。具有铒掺杂核的光增益光纤连接到波分多路复用器，并被布置成被泵浦光光泵浦，使得增益光纤发射传播到波分复用器的宽带光。输出光纤连接到波分多路复用器，并且布置成将由增益光纤发射的宽带光的一部分引导到光纤陀螺仪。过滤装置与由增益光纤发射的宽带光线成一直线排列以衰减过滤装置的带宽以外的光。滤波器装置允许比宽带光源的光谱宽度窄的光的带宽传播，同时衰减其工作带宽以外的所有波长的光。选择包含在滤波器带通内的宽带源频谱的部分，从而使宽带光纤源的频谱宽度变窄。这种较窄的光谱宽度减小了当增益光纤和其他敏感光学部件暴露于电离辐射时导致的宽带光纤源的质心波长的偏移。

3. 发明授权

US06330105B1 Double-pass fully isolated broadband optical signal source for fiber optic interferometric sensors 失效
标题翻译：用于光纤干涉传感器的双通全隔离宽带光信号源
公开(公告)号：US06330105B1
公开(公告)日：2001-12-11
申请号：US09087350
申请日：1998-05-29
申请人： David M. Rozelle , Ronald J. Michal , Leo K. Lam , John F. Cappi
发明人： David M. Rozelle , Ronald J. Michal , Leo K. Lam , John F. Cappi
IPC分类号： G02F101
CPC分类号： H01S3/06795 , G01C19/721
摘要： A pump light source provides pump light to an optical fiber arranged to guide the pump light to a first optical isolation device. Light output by the first optical isolation device is input to a wavelength division multiplexer. A gain fiber is connected to the wavelength division multiplexer and arranged to be optically pumped by the pump light such that the gain fiber emits broadband light that propagates to the wavelength division multiplexer. An output optical fiber is connected to the wavelength division multiplexer and arranged to guide a portion of the broadband light emitted by the gain fiber to a second optical isolation device for input to a fiber optic rotation sensor.
摘要翻译：泵浦光源向布置成将泵浦光引导到第一光隔离装置的光纤提供泵浦光。由第一光隔离装置输出的光输入到波分复用器。增益光纤连接到波分多路复用器，并被布置为被泵浦光光泵浦，使得增益光纤发射传播到波分复用器的宽带光。输出光纤连接到波分多路复用器，并且布置成将由增益光纤发射的宽带光的一部分引导到第二光隔离装置以输入到光纤旋转传感器。

4. 发明授权

US06205265B1 Apparatus and method for isolated photobleaching fiber optic rotation sensor coils 失效
标题翻译：隔离光漂白光纤旋转传感器线圈的装置和方法
公开(公告)号：US06205265B1
公开(公告)日：2001-03-20
申请号：US09087348
申请日：1998-05-29
申请人： David M. Rozelle , Ronald J. Michal
发明人： David M. Rozelle , Ronald J. Michal
IPC分类号： G02B626
CPC分类号： G01C19/721
摘要： Apparatus for minimizing the effects of radiation induced attenuation on a sense coil in a fiber optic rotation sensor includes apparatus for injecting photobleach light at a frequency selected to remove radiation-induced color centers. Wavelength division multiplexing optical couplers are used to introduce the photobleach light into the fiber optic rotation sensor system and then remove the photobleach light from the gyroscope optical circuit without effecting the gyro signal.
摘要翻译：用于最小化辐射诱导的衰减对光纤旋转传感器中的感测线圈的影响的装置包括用于以选择以去除辐射诱导的颜色中心的频率注入光漂白光的装置。波分复用光耦合器用于将光漂白光引入到光纤旋转传感器系统中，然后从陀螺仪光电路中去除光漂白灯，而不影响陀螺仪信号。

5. 发明授权

US4789241A Optical fiber sensing systems having acoustical optical deflection and; modulation devices 失效
标题翻译：具有声光偏转的光纤传感系统; 调制装置
公开(公告)号：US4789241A
公开(公告)日：1988-12-06
申请号：US17691
申请日：1987-02-24
申请人： Ronald J. Michal , Eric Udd , Richard F. Cahill
发明人： Ronald J. Michal , Eric Udd , Richard F. Cahill
IPC分类号： G01C19/72 , G01D5/26 , G01B9/02
CPC分类号： G02F1/332 , G01C19/726 , G01D5/266
摘要： There is provided by this invention an optical sensing system utilizing a Sagnac interferometer having a frequency shifter within the Sagnac counterpropagating loop that is generally comprised of a plurality of acoustic transducers mounted on acousto-optical material to frequency shift and beamsplit a light beam simultaneously within the material while at the same time having the capability of switching between an upshifted or downshifted frequency in either a Bragg or Raman-Nath mode of operation without realigning the optical beams. The acousto-optical material has a special configuration to eliminate back reflections of the acoustic waves that can interact with the light beam. In addition, special alignment of the transducers with dampening configurations also serves to prevent back reflections of the acoustic wave from interacting with the light beam.
摘要翻译：本发明提供了一种利用Sagnac干涉仪的光学感测系统，该Sagnac干涉仪在Sagnac反向传播环路内具有一个频率移位器，通常由安装在声光材料上的多个声换能器组成，以便在频移上同时将光束分光同时具有在布拉格或拉曼 - 纳思操作模式中的升高或降档频率之间切换的能力，而不重新对准光束。声光材料具有特殊的配置，以消除可与光束相互作用的声波的反射反射。此外，换能器与阻尼配置的特殊对准还用于防止声波与光束相互作用的反射。

6. 发明授权

US4787741A Fiber optic sensor 失效
标题翻译：光纤传感器
公开(公告)号：US4787741A
公开(公告)日：1988-11-29
申请号：US917390
申请日：1986-10-09
申请人： Eric Udd , Ronald J. Michal , Steven F. Watanabe , John P. Theriault , Richard F. Cahill
发明人： Eric Udd , Ronald J. Michal , Steven F. Watanabe , John P. Theriault , Richard F. Cahill
IPC分类号： G01D5/353 , G01H9/00 , G01B9/02
CPC分类号： G01D5/35383 , G01H9/004
摘要： There is provided a fiber optic sensor for sensing environmental effects on counterpropagating light beams in an optical loop by comparing the modulation of the light beams in an optical coil exposed to the environmental effects and comparison with a reference fiber shielded from the environmental effects. The counterpropagating light paths contain optical phase modulators for creating nonreciprocal phase shifts and may comprise elongated sections forming a long line array.
摘要翻译：提供了一种光纤传感器，用于通过比较暴露于环境影响的光学线圈中的光束的调制和与环境影响屏蔽的参考光纤进行比较来感测在光环路中对相反传播光束的环境影响。反向传播光路包含用于产生非相互相移的光学相位调制器，并且可以包括形成长线阵列的细长部分。

7. 发明授权

US5598489A Depolarized fiber optic rotation sensor with low faraday effect drift 失效
标题翻译：具有低法拉第效应漂移的去极化光纤旋转传感器
公开(公告)号：US5598489A
公开(公告)日：1997-01-28
申请号：US281339
申请日：1994-07-27
申请人： George A. Pavlath , Ronald J. Michal , Ralph A. Patterson , Sidney X. Y. Huang
发明人： George A. Pavlath , Ronald J. Michal , Ralph A. Patterson , Sidney X. Y. Huang
IPC分类号： G01C19/72 , G01R33/032 , G02B6/00
CPC分类号： G01C19/721
摘要： A fiber optic sensing coil formed in a polarization-maintaining optical fiber has two optical fiber leads extending therefrom. A multifunction integrated optics chip linearly polarizes optical signals input to the sensing coil. Fiber optic leads formed of polarization-maintaining optical fiber extend from the multifunction integrated optics chip. The fiber optic multifunction integrated optics chip leads are arranged such that the linear polarization of optical signals output from the multifunction integrated optics chip is directed along one of the principal axes of birefringence of each of the fiber optic multifunction integrated optics chip leads. Splices are formed between corresponding the first sensing coil leads and the multifunction integrated optics chip leads. The sensing coil leads and the multifunction integrated optics chip leads are arranged such that their corresponding principal axes of birefringence are at angles of approximately 45.degree. relative to one another. The first splice is formed a distance from the multifunction integrated optics chip such that a selected phase change between polarization components occurs in optical waves that propagate the distance L.sub.1 in the first multifunction integrated optics chip lead.
摘要翻译：形成在偏振保持光纤中的光纤感测线圈具有从其延伸的两根光纤引线。多功能集成光学芯片将输入到感测线圈的光信号线性偏振。由偏振保持光纤形成的光纤引线从多功能集成光学芯片延伸。光纤多功能集成光学芯片引线被布置成使得从多功能集成光学芯片输出的光信号的线性偏振沿着每个光纤多功能集成光学芯片引线的双折射的主轴指向。在对应的第一感测线圈引线和多功能集成光学芯片引线之间形成接头。感测线圈引线和多功能集成光学芯片引线被布置成使得它们相应的双折射主轴相对于彼此成45°角。第一接头与多功能集成光学芯片形成一定距离，使得在第一多功能集成光学芯片引线中传播距离L1的光波中产生偏振分量之间所选择的相位变化。

8. 发明授权

US06597842B2 Optical interleaver with image transfer element 失效
公开(公告)号：US06597842B2
公开(公告)日：2003-07-22
申请号：US09862146
申请日：2001-05-21
申请人： Jyl Ren Dent , Amado Cordova , Ronald J. Michal , Chin L. Chang , Trong-Huang Lee
发明人： Jyl Ren Dent , Amado Cordova , Ronald J. Michal , Chin L. Chang , Trong-Huang Lee
IPC分类号： G02B642
CPC分类号： G02B6/29353 , G02B6/29386 , G02B6/32
摘要： An optical interleaver. The interleaver is based upon the Mach Zender interferometer. At least one of the optical paths joining opposed couplers of the arrangement includes an optical image transfer element intermediate the ends of fibers associated with the couplers. In one embodiment, the optical image transfer element is a single imaging lens whereas, in another embodiment, the element consists of an aligned pair of collimating lenses. During fabrication, optical positioning stages support the optical image transfer element and fiber ends to permit ready adjustment of &Dgr;&THgr;, the optical path length difference between the arms of the interleaver, to assure predetermined optical channel spacing of an input DWDM signal.

9. 发明授权

US5488683A Method for splicing polarization maintaining fiber with elliptical stress member 失效
标题翻译：用椭圆应力构件拼接极化保持光纤的方法
公开(公告)号：US5488683A
公开(公告)日：1996-01-30
申请号：US235172
申请日：1994-04-29
申请人： Ronald J. Michal , Fernando Torres
发明人： Ronald J. Michal , Fernando Torres
IPC分类号： G02B6/255 , G02B6/38
CPC分类号： G02B6/2555 , G02B6/2551
摘要： The ends of a pair of polarization-maintaining optical fibers that each have an elliptical stress member in the cladding to produce stress induced birefringence are placed end-to-end with a predetermined gap between the ends of the fibers. The ends of the fibers are examined with an optical imaging apparatus whose focus is adjusted to locate an alignment band in each fiber. The position of one of the polarization-maintaining optical fibers is then adjusted until the two alignment bands are in longitudinal alignment. The fiber ends are pre annealed and then fused together by application of energy from an electric arc.
摘要翻译：在包层中具有椭圆应力构件以产生应力诱导双折射的一对偏振保持光纤的端部以纤维端部之间的预定间隙端对端放置。用光学成像装置检查纤维的端部，其中调整其焦点以在每个纤维中定位对准带。然后调整一个偏振保持光纤的位置，直到两个对准带处于纵向对准。纤维端部进行预退火，然后通过施加电弧的能量将其熔合在一起。

10. 发明授权

US5333214A Apparatus for reducing magnetic field-induced bias errors in a fiber optic gyroscope 失效
标题翻译：用于减少光纤陀螺仪中的磁场引起的偏差误差的装置
公开(公告)号：US5333214A
公开(公告)日：1994-07-26
申请号：US17678
申请日：1993-02-12
申请人： Sidney X. Huang , Ronald J. Michal , Ralph A. Patterson , George A. Pavlath
发明人： Sidney X. Huang , Ronald J. Michal , Ralph A. Patterson , George A. Pavlath
IPC分类号： G01C19/72 , G02B6/00 , G01B9/02
CPC分类号： G01C19/721
摘要： Apparatus for suppressing the bias errors induced by the Faraday effect in the output of a sensor coil exposed to a magnetic field. Arrangements are formed at two leads of the sensor coil for compensating the bias shifts. One of such arrangements comprises at least one loop of optical fiber for compensating the effect induced by the magnetic field component oriented transverse to the axis of the sensor coil while the other comprises at least one loop oriented at a predetermined pitch angle for compensating the effect induced by a magnetic field component along the axis. In each case, a predetermined degree of twist of a preselected fiber twist mode is imposed upon the compensator loop for creating a counteracting, corrective Faraday effect. Cross-coupling does not occur between the two compensators as their twist rate perodicities are unequal.
摘要翻译：用于抑制暴露于磁场的传感器线圈的输出中由法拉第效应引起的偏置误差的装置。在传感器线圈的两个引线处形成用于补偿偏置偏移的布置。这种布置之一包括至少一个光纤环路，用于补偿由横向于传感器线圈的轴线定向的磁场分量引起的效应，而另一个环路包括以预定的俯仰角定向的至少一个环路，用于补偿诱发的效应通过沿轴的磁场分量。在每种情况下，预先选择的纤维扭转模式的预定捻度被施加在补偿器回路上，以产生抵消的纠正法拉第效应。两个补偿器之间不会发生交叉耦合，因为它们的扭曲率百分比不相等。

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