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1. 发明授权

US5384636A External scatter removal system 失效
标题翻译：外部散射去除系统
公开(公告)号：US5384636A
公开(公告)日：1995-01-24
申请号：US629108
申请日：1990-12-12
申请人： Graham J. Martin , Leo K. Lam , Thomas J. Hutchings
发明人： Graham J. Martin , Leo K. Lam , Thomas J. Hutchings
IPC分类号： G01C19/66 , G01B9/02 , H01S3/083
CPC分类号： G01C19/662
摘要： Disclosed herein is an External Scatter Removal System for Ring Laser Gyroscopes (such as a Split Gain Multioscillator) comprising a prism mounted on an optoisolator, wherein light transmitted out at least one of the mirrors of the Gyroscope passes into the prism and detector system, while oppositely directed backscattered light from the prism components is not returned to the gyroscope frame's internal optical path, thereby limiting any appreciable backscatter from interfering with an accurate measurement of the rotation rate of the gyroscope.
摘要翻译：本文公开了一种用于环形激光陀螺仪的外部散射去除系统（例如分裂增益多体振荡器），其包括安装在光隔离器上的棱镜，其中透射出的至少一个陀螺仪的反射镜的光进入棱镜和检测器系统，同时来自棱镜部件的相反导向的后向散射光不会返回到陀螺仪框架的内部光路，从而限制任何可观的反向散射干扰陀螺仪的旋转速度的精确测量。

2. 发明授权

US5371591A Triaxial split-gain ring laser gyroscope 失效
标题翻译：三轴分频增益环激光陀螺仪
公开(公告)号：US5371591A
公开(公告)日：1994-12-06
申请号：US570839
申请日：1990-08-13
申请人： Graham J. Martin , Leo K. Lam
发明人： Graham J. Martin , Leo K. Lam
IPC分类号： G01C19/66 , H01S3/083 , G01B9/02
CPC分类号： G01C19/667 , H01S3/083
摘要： A triaxial multioscillator for operation in accordance with a mode of operation requiring the imposition of a substantially uniform axial magnetic field on the gain region of each lasing cavity. An integral frame of glass ceramic material has a rhombic dodecahedral shape and includes three closed lasing cavities, each formed of four straight segments. The cavities include three mutually parallel segments, one from each cavity, that are regularly spaced on a circle perpendicular to the axis of the frame. An internal cathode and six anodes are associated with the frame to provide gain in each of such three segments. The frame is positioned within a closed cylindrical element of soft iron composition by means of a fixture. The fixture positions magnets adjacent the top and bottom of the element to generate parallel lines of magnetic flux therein. The frame is positioned within the container in such a way that the cavity segments containing the three gain regions are aligned with the parallel lines of flux to produce the requisite axial fields in the three gain regions.
摘要翻译：一种用于根据操作模式操作的三轴多振荡器，其需要在每个激光腔的增益区上施加基本上均匀的轴向磁场。玻璃陶瓷材料的整体框架具有菱形十二面体形状，并且包括三个封闭的激光腔，每个腔由四个直段形成。空腔包括三个相互平行的段，一个来自每个腔，在与框架的轴线垂直的圆周上规则地间隔开。内部阴极和六个阳极与框架相关联，以在这三个段中的每一个中提供增益。框架通过固定装置位于软铁组合物的闭合圆柱形元件内。固定装置将邻近元件的顶部和底部的磁体定位成在其中产生平行的磁通线。框架以这样的方式定位在容器内，使得包含三个增益区域的空腔区段与平行的通量线对准，以在三个增益区域中产生必需的轴向场。

3. 发明授权

US6088149A Apparatus for use in ring laser gyroscopes 失效
标题翻译：用于环形激光陀螺仪的设备
公开(公告)号：US6088149A
公开(公告)日：2000-07-11
申请号：US283484
申请日：1994-07-29
申请人： John P. Rahn , Leo K. Lam
发明人： John P. Rahn , Leo K. Lam
IPC分类号： G01C19/66 , G02B1/02 , G02B5/30 , G02B27/28 , G02F1/09
CPC分类号： G02B1/08 , G01C19/667 , G02B1/02 , G02B27/28 , G02B5/3083 , G02F1/093
摘要： The invention is a focusing polarization rotator for use in the resonant mirror system of a ring laser gyroscope. The focusing polarization rotator accomplishes the traditional task of rotating the plane of polarization of a light beam that passes through it and at the same time performs a focusing function on the light rays. In a resonant mirror system, the device acts to constrain the transverse dimensions of light beams that follow the closed light-beam path established by the resonant mirror system thereby obviating the need for one or more curved mirrors that usually perform this function. The focusing polarization rotator is a wedge-shaped lens made from either a magneto-optic transparent material with a magnetic field within the lens or a material having different indices of refraction for left- and right-circularly-polarized light. The wedge shape of the lens greatly improves the bias stability of the RLG in which it is used.
摘要翻译：本发明是用于环形激光陀螺仪的谐振反射镜系统中的聚焦偏振旋转器。聚焦偏振旋转器实现了通过它的光束旋转偏振平面的传统任务，同时对光线进行聚焦功能。在谐振反射镜系统中，该装置用于限制遵循由谐振反射镜系统建立的闭合光束路径的光束的横向尺寸，从而避免了对通常执行该功能的一个或多个弯曲反射镜的需要。聚焦偏振旋转器是由透镜内具有磁场的磁光透明材料制成的楔形透镜，或对于左右偏振光具有不同折射率的材料。透镜的楔形大大提高了使用它的RLG的偏置稳定性。

4. 发明授权

US5469256A Multipole magnetic geometry for a ring laser gyroscope 失效
标题翻译：环形激光陀螺仪的多极磁几何
公开(公告)号：US5469256A
公开(公告)日：1995-11-21
申请号：US228308
申请日：1988-07-29
申请人： David B. Hall , Leo K. Lam
发明人： David B. Hall , Leo K. Lam
IPC分类号： G01C19/66 , G01C19/64 , H01S3/10
CPC分类号： G01C19/66 , G01C19/667
摘要： Disclosed herein is a multi-pole magnetic geometry for a multi-oscillator ring laser gyroscope. Multi-pole magnetic geometry configurations are disclosed which are useful for providing Faraday rotation where the multi-oscillator uses a Faraday rotator and high magnetic field effect where the nature of the multi-oscillator ring laser gyroscope is of split gain configuration. The multi-post magnetic geometry includes a plurality of top or bottom loaded diametrically opposed north and south pole axially directed magnets which are positioned substantially transverse to the optical pathway but suitable for providing axially directed magnetic fields to portions of the optical pathway only where desired. The multi-pole magnetic geometry disclosed herein substantially produces a magnetic flux that is restricted in its position to localized portions of the optical pathway with low far field effects.
摘要翻译：这里公开了用于多振荡环形激光陀螺仪的多极磁几何形状。公开了多极磁几何配置，其可用于提供法拉第旋转，其中多谐振器使用法拉第旋转器和高磁场效应，其中多振荡环形激光陀螺仪的性质是分束增益配置。多柱磁几何形状包括多个顶部或底部加载的径向相对的北极和南极轴向定向的磁体，其基本上横向于光学路径定位，但是仅适合于仅在需要时向光学路径的部分提供轴向定向的磁场。本文公开的多极磁性几何形状基本上产生磁通量，其被限制在具有低远场效应的光学路径的局部部分的位置。

5. 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。

6. 发明授权

US4525672A Apparatus and method for laser pumping of nuclear magnetic resonance cell 失效
标题翻译：激光泵浦核磁共振电池的装置和方法
公开(公告)号：US4525672A
公开(公告)日：1985-06-25
申请号：US480608
申请日：1983-03-30
申请人： Leo K. Lam , Edward Phillips
发明人： Leo K. Lam , Edward Phillips
IPC分类号： G01C19/62 , G01N24/00 , G01R33/08
CPC分类号： G01N24/006 , G01C19/62
摘要： A method and apparatus for optical pumping of an NMR cell by means of laser light. A current driver provides an a.c. current waveform as injection current to a laser diode. The resulting laser intensity spectrum closely approximates the absorption spectrum of the cell to thereby increase the signal generated for a given power input.
摘要翻译：用于通过激光光学泵浦NMR单元的方法和装置。当前驱动程序提供a.c. 电流波形作为激光二极管的注入电流。所得到的激光强度谱密度近似于单元的吸收光谱，从而增加了给定功率输入产生的信号。

7. 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。

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