-
公开(公告)号：US11920933B2
公开(公告)日：2024-03-05
申请号：US17171858
申请日：2021-02-09
CPC分类号： G01C19/661 , G01C19/728 , H01S3/1086
摘要： Techniques for reducing the bias error present in optical gyroscopes is disclosed. Such techniques include at least one path length adjustment member placed in an optical gyroscope resonator, which are configured to modulate the optical path length of the resonator so that bias errors attributable to the optical path length are shifted outside of the bandwidth of the optical gyroscope. In some embodiments, the at least one path length adjustment member includes a plurality of microheaters coupled to the resonator, in which case optical path length modulation is achieved by heating the resonator via the microheaters. Alternatively, a plurality of piezo-electric regions can be placed in the resonator, which enables optical path length modulation through electric field gradients applied to the piezo-electric regions.
-
公开(公告)号：US20230251093A1
公开(公告)日：2023-08-10
申请号：US18091148
申请日：2022-12-29
发明人： Yusuke GOCHO , Naoki YAMAMOTO , Kazunori YOSHIOKA , Kenji ABE
CPC分类号： G01C19/70 , G01C19/662
摘要： A ring laser gyroscope includes an optical block for generating laser beams that counter-propagate in a closed-loop type optical path, a dither mechanism for applying dither vibration for mitigating a lock-in phenomenon to the optical block, and a dither controller for controlling the dither vibration. The dither controller imparts randomness to the frequency of the angular velocity of the dither vibration.
-
公开(公告)号：US20210180953A1
公开(公告)日：2021-06-17
申请号：US16575116
申请日：2019-09-18
发明人： Jianfeng Wu , Matthew Wade Puckett , Steven Tin
摘要： A stimulated Brillouin scattering gyroscope is provided. A pump laser generates continuous wave (CW) energy that travels through at least one bus waveguide to a waveguide resonator. A reflector is positioned within the waveguide resonator. The reflector is configured to pass at least some of the CW energy in a first direction and reflect at least some stimulated Brillouin scattering (SBS) energy in a second direction. A first detector is in operational communication with the at least one bus waveguide to detect CW energy. An output of the first detector used to at least adjust a pump laser frequency of the pump laser. A second detector is also in operational communication with the at least one bus waveguide. The second detector is used to determine phase shifts in detected SBS energy to determine at least rotation.
-
公开(公告)号：US10731987B2
公开(公告)日：2020-08-04
申请号：US16179437
申请日：2018-11-02
摘要： A stimulated Brillouin scattering (SBS) gyroscope comprises a resonator; a first laser in communication with the resonator and configured to emit a first optical signal propagating in a first direction, the first optical signal producing a first SBS signal counter-propagating in a second direction; a second laser in communication with the resonator and configured to emit a second optical signal propagating in the first direction, the second optical signal producing a second SBS signal counter-propagating in the second direction; a third laser in communication with the resonator and configured to emit a third optical signal propagating in the second direction, the third optical signal producing a third SBS signal counter-propagating in the first direction. At least one photodetector is coupled to the resonator and receives the SBS signals, which are combined in the photodetector to produce electrical signals that include rotational rate information encoded in frequencies of the electrical signals.
-
公开(公告)号：US20200056888A1
公开(公告)日：2020-02-20
申请号：US16104806
申请日：2018-08-17
IPC分类号： G01C19/66 , H01S3/083 , H01S3/0941 , H01S3/16 , H01S3/08 , H01S3/0933
摘要： A solid state ring laser gyroscope comprises a laser block including a resonant ring cavity having an optical closed loop pathway; a plurality of mirror structures mounted on the block and including respective multilayer mirrors that reflect light beams around the closed loop pathway; and a pump laser assembly in optical communication with the closed loop pathway through one of the mirror structures. One or more of the multilayer mirrors includes a rare-earth doped gain layer operative to produce bidirectional optical amplification of counter-propagating light beams in the closed loop pathway. In some embodiments, the gain layer comprises a rare-earth dopant other than neodymium that is doped into a glassy host material comprising titania, tantalum oxide, alumina, zirconia, silicate glass, phosphate glass, tellurite glass, fluorosilicate glass, or non-oxide glass. Alternatively, the gain layer can comprise a neodymium dopant that is doped into a glassy host material other than silica.
-
公开(公告)号：US10415970B2
公开(公告)日：2019-09-17
申请号：US15799027
申请日：2017-10-31
摘要： A chip-scale ultrasensitive ring laser gyroscope that utilizes the physics of exceptional points. By exploiting the properties of such non-Hermitian degeneracies, the rotation-induced frequency splitting becomes proportional to the square root of the gyration speed (Ω1/2), thus enhancing the sensitivity to low angular rotations by orders of magnitudes. At its maximum sensitivity limit, the measurable spectral splitting is independent of the radius of the cavity rings involved. Binary and ternary systems and associated methods are described.
-
7.发明授权公开(公告)号：US09568317B2
公开(公告)日：2017-02-14
申请号：US13755139
申请日：2013-01-31
CPC分类号： G01C19/662 , G01C19/721 , G06F17/5045
摘要： A system comprising a fiber optic gyroscope and a mixed signal application specific integrated circuit (ASIC) connected to the gyroscope is provided. The mixed signal ASIC comprises a digital logic unit, a relative intensity noise (RIN) analog-to-digital converter (ADC) coupled to the digital logic unit and configurable to receive a signal from a RIN detector, and a rate ADC coupled to the digital logic unit and configurable to receive a signal from a rate detector. The mixed signal ASIC also includes a light source digital-to-analog converter (DAC) coupled to the digital logic unit, and a thermo-electric cooler DAC coupled to the digital logic unit, both of which are configurable to send control signals to a light source of the gyroscope. The mixed signal ASIC further includes an integrated optical chip DAC, an eigen-frequency servo DAC, and a heater servo DAC, all of which are coupled to the digital logic unit.
摘要翻译： 提供了一种包括光纤陀螺仪和连接到陀螺仪的混合信号专用集成电路（ASIC）的系统。 混合信号ASIC包括数字逻辑单元，耦合到数字逻辑单元并可配置为从RIN检测器接收信号的相对强度噪声（RIN）模数转换器（ADC）和耦合到 数字逻辑单元并且可配置为从速率检测器接收信号。 混合信号ASIC还包括耦合到数字逻辑单元的光源数模转换器（DAC）和耦合到数字逻辑单元的热电冷却器DAC，它们都可配置为将控制信号发送到 陀螺仪的光源。 混合信号ASIC还包括集成光学芯片DAC，本征频率伺服DAC和加热器伺服DAC，所有这些都耦合到数字逻辑单元。
-
公开(公告)号：US20160238392A1
公开(公告)日：2016-08-18
申请号：US15140059
申请日：2016-04-27
申请人： SHENZHEN UNIVERSITY
发明人： Qiao WEN , Guowen LIANG , Ji LI , Hanben NIU
IPC分类号： G01C19/66
CPC分类号： G01C19/661 , H01S3/06712 , H01S3/06791 , H01S3/082 , H01S3/1061
摘要： The present invention is suitable for the technical field of sensing, and provides a ring laser sensor comprising a pump source, a common section, and a reference section and a detection section, the common section is provided with a gain medium, the common section and the reference section form a first ring laser resonator, and the common section and the detection section form a second ring laser resonator, lasers are transmitted oppositely in the first ring laser resonator and the second ring laser resonator, the detection section is provided with a sensing element capable of causing an optical path difference; the common section is provided with an output unit or each of the reference section and the detection is provided with the output unit, the output unit is connected to a photoelectric detector through a light uniting unit. In the present invention, two ring laser resonators with opposite transmission directions is provided, the detection section is provided with the sensing element, and because the frequencies of the laser are sensitive to the changes of the optical paths in the resonators, the sensitivity and accuracy of the sensor are high, and the two resonators of the sensor have common optical path, such that the sensor has good anti jamming capacity and is suitable for measuring the small changes in a variety of physical quantities.
摘要翻译： 本发明适用于感测技术领域，并且提供一种环形激光传感器，其包括泵浦源，公共部分，参考部分和检测部分，公共部分设置有增益介质，公共部分和 参考部分形成第一环形激光谐振器，公共部分和检测部分形成第二环形激光谐振器，激光器在第一环形激光谐振器和第二环形激光谐振器中相对地传输，检测部分提供感测 能够引起光程差的元件; 公共部分设置有输出单元或参考部分中的每一个，并且检测设置有输出单元，输出单元通过光联合单元连接到光电检测器。 在本发明中，提供了具有相反传输方向的两个环形激光谐振器，检测部分设置有感测元件，并且由于激光的频率对谐振器中的光路的变化敏感，所以灵敏度和精度 传感器的两个谐振器具有共同的光路，使得传感器具有良好的抗干扰能力，并且适用于测量各种物理量的小变化。
-
9.发明申请RADIO FREQUENCY RING LASER GYROSCOPE INCLUDING A MULTIPLE ELECTRODE SYSTEM AND AN IMPEDANCE MATCHING CIRCUIT 有权无线电频闪激光陀螺仪，包括多个电极系统和阻抗匹配电路公开(公告)号：US20160209213A1
公开(公告)日：2016-07-21
申请号：US14597971
申请日：2015-01-15
发明人： Terry Dean Stark , Jason Wiebesick , Travis Edward Christle , Douglas R. Carlson , Ruth Dagmar Kreichauf
IPC分类号： G01C19/66
CPC分类号： G01C19/661 , G01C19/66
摘要： A ring laser gyroscope comprises a block defining a hermetically sealed cavity for a ring laser formed when a lasing medium disposed within the cavity is excited. A cathode and an anode are attached to the block at two fill positions comprised within the cavity, and exposed to the lasing medium such that the lasing medium is ionized when a high voltage pulse is supplied across cathode and anode. At least two RF electrodes are attached to the block, positioned on opposing sides to generate a capacitive discharge for the purpose of keeping the lasing medium excited. The gyro comprises a matching circuit to tune the frequency of a radio frequency (RF) signal generated by a RF power source before the RF signal is sent to the electrodes. The matching circuit is coupled to the RF electrodes via respective lead wires, and comprises an element matching network.
摘要翻译： 环形激光陀螺仪包括限定用于当激发设置在腔内的激光介质时形成的环形激光器的气密密封腔的块。 阴极和阳极在包含在空腔内的两个填充位置处附接到块，并暴露于激光介质，使得当在阴极和阳极之间提供高电压脉冲时，激光介质被电离。 至少两个RF电极附接到块，位于相对侧上以产生用于保持激光介质激发的电容放电。 该陀螺仪包括一个匹配电路，用于在将RF信号发送到电极之前调整由RF电源产生的射频（RF）信号的频率。 匹配电路通过相应的引线耦合到RF电极，并且包括元件匹配网络。
-
公开(公告)号：US09389080B2
公开(公告)日：2016-07-12
申请号：US14150348
申请日：2014-01-08
CPC分类号： G01C19/662 , G01C19/661 , H01S3/03 , H01S3/0385 , H01S3/0835 , H01S3/097 , H01S3/139
摘要： A ring laser gyroscope comprises a laser block that defines an optical closed loop pathway configured to contain a lasing gas. A plurality of mirror structures are respectively mounted on the laser block, with each of the mirror structures having a respective reflective surface that is in optical communication with the optical closed loop pathway. A plurality of electrodes are coupled to the laser block, with the electrodes configured to generate a pair of counter-propagating laser beams from the lasing gas in the optical closed loop pathway. At least one optical sensor is coupled to one of the mirror structures, with the optical sensor in optical communication with the closed loop pathway. A polarizer is in optical communication with the optical sensor. The polarizer is configured to pass laser light having substantially one polarization mode to the optical sensor.
摘要翻译： 环形激光陀螺仪包括限定被配置为容纳激光气体的光学闭环路径的激光器块。 多个反射镜结构分别安装在激光块上，其中每个反射镜结构具有与光学闭环路径光学连通的相应的反射表面。 多个电极耦合到激光器块，电极被配置为在光学闭环路径中产生来自激光气体的一对反向传播的激光束。 至少一个光学传感器耦合到一个反射镜结构，其中光学传感器与闭环路径光学通信。 偏振器与光学传感器光学通信。 偏振器被配置为将具有基本上一个偏振模式的激光传送到光学传感器。
-
-
-
-
-
-
-
-
-
搜索结果
633 条记录 (耗时 0.023 秒)
