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41. 发明授权

US5781300A Backscatter error reducer for interferometric fiber optic gyroscope 失效
标题翻译：用于干涉光纤陀螺仪的后向散射误差减小器
公开(公告)号：US5781300A
公开(公告)日：1998-07-14
申请号：US741464
申请日：1996-10-31
申请人： Lee K. Strandjord , Glen A. Sanders , Bogdan Szafraniec , Ralph A. Bergh
发明人： Lee K. Strandjord , Glen A. Sanders , Bogdan Szafraniec , Ralph A. Bergh
IPC分类号： G01C19/72
CPC分类号： G01C19/72
摘要： A backscatter or secondary wave error reducer for an interferometric fiber optic gyroscope having at least one phase modulator for receiving a square wave bias phase modulation signal and a sine wave carrier suppression modulation signal. The amplitude of the carrier suppression modulation signal is sufficient to greatly reduce the interference between two sets of backscattered or secondary waves of light originating in the Sagnac loop of the gyroscope. Reduction or elimination of the interference of the two sets of secondary waves reduces or eliminates the secondary wave induced rotation rate sensing error. The frequency of the carrier suppression signal is near or equal to an even harmonic of the proper frequency of the Sagnac loop to reduce the sinusoidal or periodic rotation rate sensing error caused by the carrier suppression modulation signal.
摘要翻译：一种用于干涉光纤陀螺仪的后向散射或二次波衰减器，其具有用于接收方波偏置相位调制信号和正弦波载波抑制调制信号的至少一个相位调制器。载波抑制调制信号的幅度足以大大减少源自陀螺仪的Sagnac回路的两组反向散射光或二次波之间的干扰。减少或消除两组二次波的干扰减少或消除二次波感应的旋转速率感测误差。载波抑制信号的频率接近或等于Sagnac环路的适当频率的偶次谐波，以减少由载波抑制调制信号引起的正弦或周期性转速检测误差。

42. 发明授权

US5377283A Configuration control of mode coupling errors 失效
标题翻译：模式耦合错误的配置控制
公开(公告)号：US5377283A
公开(公告)日：1994-12-27
申请号：US49185
申请日：1993-04-16
申请人： James N. Blake , John R. Feth , Bogdan Szafraniec
发明人： James N. Blake , John R. Feth , Bogdan Szafraniec
IPC分类号： G01C19/72 , G02B6/00 , G02F1/01 , G02B6/26
CPC分类号： G01C19/721
摘要： An optical fiber rotation sensor having an ordinary single mode fiber coil with a depolarizer in series therewith configured with component optical path lengths therein and birefringent axes relationships therein chosen with respect to the source autocorrelation. Amplitude related phase errors due to polarization mode coupling can be eliminated or reduced economically, and signal fading can be substantially prevented.
摘要翻译：一种具有普通单模光纤线圈的光纤旋转传感器，其具有串联的去偏振器，其中配置有分量光路长度，并且相对于源自相关选择双折射轴关系。由于偏振模耦合引起的振幅相关误差可以经济地消除或降低，并且可以显着地防止信号衰落。

43. 发明授权

US5351124A Birefringent component axis alignment detector 失效
标题翻译：双折射分量轴对准检测器
公开(公告)号：US5351124A
公开(公告)日：1994-09-27
申请号：US998312
申请日：1992-12-29
申请人： Clarence E. Laskoskie , Bogdan Szafraniec
发明人： Clarence E. Laskoskie , Bogdan Szafraniec
IPC分类号： G01B9/02 , G01B11/27 , G02B6/38
CPC分类号： G01B9/0209 , G01B11/272 , G01B9/02002 , G02B6/3803 , G01B2290/70
摘要： An axis alignment detector for aligning axes of two birefringent components or fibers at forty-five degrees relative to each other. Polarized light is put into one axis of one of the two components or fibers to be aligned. The light goes from the one fiber through a junction where the two components or fibers are to be aligned at forty-five degrees, into the axes of the other component or fiber. The other component or fiber is temporarily connected to a third birefringent component or fiber wherein light moves on into the third component or fiber. The light from the third component or fiber goes on through a polarizer on to a mirror or integrated optic interferometer. The interferometer provides an interference output that reveals when the two components or fibers have a forty-five degree axis alignment. Also, the interferometer output may be used to measure other angles of axis alignment. One light path of the interferometer is modulated and the interferometer output is converted to an electrical signal which is electronically processed to improve detection of an accurate forty-five degree alignment of the to-be-joined or spliced pair of birefringent components or fibers.
摘要翻译：轴对准检测器，用于将两个双折射元件或光纤的轴相对于彼此成四十五度。将偏振光放入要对齐的两个组分或纤维之一的一个轴上。光从一根光纤通过两个部件或光纤将四十五度对准到另一个部件或光纤的轴线的连接处。另一部件或光纤临时连接到第三双折射部件或光纤，其中光移动到第三部件或光纤中。来自第三组分或光纤的光通过偏振器进入反射镜或集成光学干涉仪。干涉仪提供干扰输出，显示两个组件或光纤何时具有四十五度轴对准。此外，干涉仪输出可以用于测量轴对准的其他角度。干涉仪的一个光路被调制，并且干涉仪输出被转换成电信号，该电信号被电子处理以改进对待接合或拼接的双折射组件或光纤对的精确四十五度对准的检测。

44. 发明授权

US5289258A Fiber optic gyroscope modulation error reduction 失效
标题翻译：光纤陀螺仪调制误差降低
公开(公告)号：US5289258A
公开(公告)日：1994-02-22
申请号：US821030
申请日：1992-01-15
申请人： Bogdan Szafraniec , Richard H. Frische , Richard J. August , Kevin B. Dimond , Dick Ang , James N. Blake , John R. Feth
发明人： Bogdan Szafraniec , Richard H. Frische , Richard J. August , Kevin B. Dimond , Dick Ang , James N. Blake , John R. Feth
IPC分类号： G01C19/72 , G02F1/01
CPC分类号： G01C19/72
摘要： An error control arrangement for an optical fiber rotation sensor having electromagnetic waves propagating in opposite directions passing through a bias optical phase modulator operated by a phase modulation generator both of which can contribute second harmonic distortion resulting in errors in the sensor output signal which are controlled. Control of the bias optical phase modulator contribution for a modulator having a piezoelectric body wrapped with an optical fiber portion is accomplished by mounting the body utilizing layers having nonlinear stiffness.
摘要翻译：一种光纤旋转传感器的误差控制装置，其具有通过相位调制发生器操作的偏置光相位调制器的相反方向传播的电磁波，这两者都可以产生二次谐波失真，从而导致传感器输出信号中被控制的误差。对具有用光纤部分包裹的压电体的调制器的偏置光学相位调制器贡献的控制通过使用具有非线性刚度的层来安装本体来实现。

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