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公开(公告)号：US20240093998A1
公开(公告)日：2024-03-21
申请号：US17932612
申请日：2022-09-15
发明人： John Downs , Mahdi Mohajeri , Dean Eivind Johnson
CPC分类号： G01C19/661 , H01J7/183 , H01J29/94
摘要： Systems and methods for a stabilized evaporable getter for increased handleability is provided. In certain embodiments, a method includes preparing a first getter material, a second getter material, and a metal material. Additionally, the method includes mixing the first getter material, the second getter material, and the metal material into a mixed getter material. Further, the method includes placing the mixed getter material into a getter holder. Also, the heat-treating the getter holder at a temperature below an activation temperature for an exothermic reaction of the mixed getter material but above a melting temperature of the metal material.
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62.发明公开公开(公告)号：US20230299553A1
公开(公告)日：2023-09-21
申请号：US18020949
申请日：2020-11-24
发明人： Jun YANG , Guochao WANG , Lingxiao ZHU , Shuhua YAN , Xiye GUO , Yaning WANG , Aiai JIA , Mengjie LV , Dongyang XU , Xu ZHANG , Huankai ZHANG , Xiao YU
CPC分类号： H01S3/302 , G01C19/661 , H01S3/0085 , H01S3/0092
摘要： A method and a system for generating single-sideband Raman light for cold atom interferometer through phase modulation are provided. The system includes a laser, an electro-optic modulator (EOM), a local microwave oscillator, a narrow-bandwidth optical-fiber filter, an optical-fiber power amplifier and a frequency doubling crystal. The laser has frequency of ω and is input to the EOM. The local microwave oscillator applies a modulation voltage with frequency of δ to the EOM and generate double-sideband frequency-modulated light with frequencies of ω±nδ(n=0,1,2, . . . ). This light is filtered by the narrow-bandwidth optical-fiber filter, which outputs the target frequency light and is successively input to the optical-fiber power amplifier and the frequency doubling crystal and yields the single-sideband Raman light for cold atom interferometer. The Raman light generation system has simple structure, low-cost, high integration level, easy implementation, high maturity and good stability, and has practical significance in realizing an engineering-based laser system for high-precision atom interferometer measurement.
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公开(公告)号：US09772188B2
公开(公告)日：2017-09-26
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
CPC分类号： G01C19/661 , H01S3/06712 , H01S3/06791 , H01S3/082 , H01S3/1061
摘要： A frequency based ring laser sensor is disclosed. The sensor includes 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. Laser beams 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, and the output unit is connected to a photoelectric detector through a light uniting unit.
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公开(公告)号：US09671228B2
公开(公告)日：2017-06-06
申请号：US14520019
申请日：2014-10-21
发明人： John F. Ackerman
CPC分类号： G01C19/665 , G01C19/661 , H01S3/09705 , H02J1/00
摘要： A ring laser gyroscope (RLG) assembly comprises an RLG block comprising: a first anode; a second anode; a cathode; and a cavity. The RLG assembly further comprises a current supply circuit coupled to the RLG block. The current supply circuit comprises a high voltage power supply to provide a high voltage signal; a first current path coupled between the high voltage power supply and the first anode to provide a first current to the first anode; and a second current path coupled between the high voltage power supply and the second anode to provide a second current to the second anode. The second current path is configured to mirror the first current such that the second current approximately matches the first current. Each component in the second current path is configured to operate based on power derived only from the high voltage signal.
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公开(公告)号：US20140320863A1
公开(公告)日：2014-10-30
申请号：US14262089
申请日：2014-04-25
CPC分类号： G01C19/661 , G01C19/66 , G01C19/72 , G01P15/093
摘要： A method for enhancing a sensitivity of an optical sensor having an optical cavity counter-propagates beams of pump light within the optical cavity to produce scattered light based on Stimulated Brullion Scattering (SBS). The properties of the pump light are selected to generate fast-light conditions for the scattered light, such that the scattered light includes counter-propagating beams of fast light. The method prevents the pump light from resonating within the optical cavity, while allowing the scattered light to resonate within the optical cavity. At least portions of the scattered light are interfered outside of the optical cavity to produce a beat note for a measurement of the optical sensor. The disclosed method is particularly applicable to optical gyroscopes.
摘要翻译： 用于增强具有光学腔的光学传感器的灵敏度的方法使光腔内的泵浦光束反向传播，以产生基于激励的Brillion散射（SBS）的散射光。 选择泵浦光的特性以产生散射光的快光条件，使得散射光包括反向传播的快光束。 该方法防止泵浦光在光腔内谐振，同时允许散射光在光腔内谐振。 散射光的至少一部分被干涉到光腔外部，以产生用于测量光学传感器的节拍。 所公开的方法特别适用于光学陀螺仪。
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公开(公告)号：US20130232739A1
公开(公告)日：2013-09-12
申请号：US13413289
申请日：2012-03-06
CPC分类号： G01C19/661 , Y10T24/44026
摘要： A retaining clip for a getter is provided. The retaining clip for a getter includes a curved structure including a first surface, a second surface opposing the first surface, a first-edge surface, and a second-edge surface opposing the first-edge surface, the curved structure curved in a major curve having a major radius-of-curvature and a major axis perpendicular to the major radius-of-curvature; and at least one tab seamlessly extending from at least one of the first-edge surface and the second-edge surface. The curved structure is configured to be operably retained in a getter cavity with the getter that is attached to the at least one tab.
摘要翻译： 提供了一个用于吸气剂的固定夹。 用于吸气剂的保持夹包括弯曲结构，其包括第一表面，与第一表面相对的第二表面，第一边缘表面和与第一边缘表面相对的第二边缘表面，弯曲结构以主曲线 具有主曲率半径和垂直于主曲率半径的长轴; 以及从所述第一边缘表面和所述第二边缘表面中的至少一个无缝地延伸的至少一个突出部。 弯曲结构构造成可操作地保持在吸气腔中，吸气剂附接到至少一个突片。
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公开(公告)号：US20120170045A1
公开(公告)日：2012-07-05
申请号：US13323666
申请日：2011-12-12
申请人： André BOURA
发明人： André BOURA
IPC分类号： G01C19/64
CPC分类号： G01C19/661
摘要： In a laser gyroscope, an activation wheel has a polygonal cylindrical hub formed by continuous assembly of vertical walls, wherein two adjacent walls of the cylindrical hub between them form a dihedron. Each radial plate of the activation wheel is connected to the cylindrical hub along the edge of a dihedron. The walls are formed with bulging portions, serving for plane-to-plane fixing of one face of the tulip to an optical block, and thin parts allowing a radial displacement degree of freedom of the fixing parts relative to the rim when there is a differential thermal expansion between the tulip and activation wheel. The activation wheel may be produced in a material having a thermal expansion coefficient higher than the tulip, for example steel, with plane-to-plane fixing of the tulip to the activation wheel hub, advantageously by screws, the assembly effectively accommodating the thermal expansion differential between the two materials.
摘要翻译： 在激光陀螺仪中，激活轮具有通过连续组装垂直壁形成的多边形圆柱形轮毂，其中圆柱形轮毂之间的两个相邻的壁形成二面体。 活化轮的每个径向板沿着二面体的边缘连接到圆柱形毂。 壁形成有凸起部分，用于将郁金香的一个面的面对面固定到光学块，以及当存在差速器时允许固定部分相对于轮辋的径向位移自由度的薄部分 郁金香和活化轮之间的热膨胀。 活化轮可以通过具有高于郁金香（例如钢）的热膨胀系数的材料生产，有利地通过螺丝将郁金香平面对面地固定到活化轮毂，该组件有效地容纳热膨胀 两种材料之间的差异。
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公开(公告)号：US20080137706A1
公开(公告)日：2008-06-12
申请号：US11609849
申请日：2006-12-12
IPC分类号： H01S3/083
CPC分类号： G01C19/661 , G02B5/0833 , G02B5/285 , H01S3/08059 , H01S3/083
摘要： A laser mirror for a ring laser gyroscope (RLG) includes an intermediate optical coating, positioned within approximately a mid portion of the laser mirror for improving the performance of the RLG, and specifically for improving the reflectance of at least one wavelength emission. The properties of the intermediate optical coating and its placement within the laser mirror results in a good reflection of a first predetermined wavelength emission wavelength, for example a 633 nanometer wavelength emission, and a poor reflection of a second predetermined wavelength emission, for example a 650 nanometer wavelength emission. In one embodiment, the intermediate optical coating includes a half-wave or a multiple half-wave thickness and is made from Zirconium Oxide.
摘要翻译： 用于环形激光陀螺仪（RLG）的激光镜包括位于激光反射镜的大约中间部分的中间光学涂层，用于改善RLG的性能，并且具体地用于改善至少一个波长发射的反射率。 中间光学涂层的性质及其在激光镜内的布置导致第一预定波长发射波长的良好反射，例如633纳米波长发射，以及第二预定波长发射的差的反射，例如650 纳米波长发射。 在一个实施例中，中间光学涂层包括半波或多半波长的厚度，并由氧化锆制成。
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公开(公告)号：US20060256828A1
公开(公告)日：2006-11-16
申请号：US10550514
申请日：2004-03-23
CPC分类号： G01C19/661 , H01S3/0604 , H01S3/0606 , H01S3/0621 , H01S3/0627 , H01S3/08059 , H01S3/083 , H01S3/136 , H01S3/139
摘要： The field of the invention is that of solid-state laser gyros. One of the major problems inherent in this technology is that the optical cavity of this type of laser is by its nature highly unstable. To reduce this instability, the invention proposes to introduce controlled optical losses into the cavity that depend on the polarization direction by placing in the cavity an optical assembly comprising a polarizing element, a first element exhibiting a reciprocal effect that acts on the polarization of the wave and a second element exhibiting a nonreciprocal effect that also acts on the polarization of the wave, at least one of these two effects being variable, and to electronically slave these losses to the difference in intensity between the counterpropagating modes. Several devices are described that implement either fixed reciprocal effects combined with variable nonreciprocal effects, or vice versa. These devices apply in particular to monolithic cavity lasers and especially to lasers of the neodymium-doped YAG type and also to fiber cavity lasers.
摘要翻译： 本发明的领域是固体激光陀螺仪的领域。 该技术固有的主要问题之一是这种激光器的光学腔由于其本质上非常不稳定。 为了减少这种不稳定性，本发明提出通过将包含偏振元件的光学组件放置在腔体中来引入受限的光学损耗，所述光学损耗依赖于偏振方向，第一元件具有作用于波的极化的相互作用 以及表现出非常相互影响的第二个元件，其也作用于波的极化，这两个效应中的至少一个是可变的，并且将这些损耗电子地从这些损耗中排除到反向传播模式之间的强度差。 描述了实现固定互惠效应与可变非互逆效应相结合的几个装置，反之亦然。 这些器件特别适用于单片腔激光器，特别适用于钕掺杂YAG型激光器以及光纤腔激光器。
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公开(公告)号：US20060045159A1
公开(公告)日：2006-03-02
申请号：US10930490
申请日：2004-08-31
申请人： Leroy Thielman , Timothy Callaghan , Christina Schober , David Malenke , Britt Proctor , Daniel Sittler , Ying Tan , Michael McCoy
发明人： Leroy Thielman , Timothy Callaghan , Christina Schober , David Malenke , Britt Proctor , Daniel Sittler , Ying Tan , Michael McCoy
IPC分类号： H01S3/22
CPC分类号： H01S3/0305 , G01C19/661 , H01S3/08059
摘要： An oxygen diffusion barrier is used to maintain a purity level of lasing gas in a ring laser gyroscope or other gas discharge device. The oxygen diffusion barrier reduces a release of contaminate gases into a cavity of the ring laser gyroscope and/or absorbs the contaminate gases in the cavity. The oxygen diffusion barrier may be formed on walls of the cavity before or after assembly of the ring laser gyroscope. Alternatively, a material may be applied to inside walls of a cathode mounted on a block of the ring laser gyroscope to maintain the purity level of the lasing gas. As a result of maintaining the purity level of the lasing gas, the ring laser gyroscope operates more efficiently.
摘要翻译： 使用氧扩散阻挡层来保持环形激光陀螺仪或其它气体放电装置中的激光气体的纯度水平。 氧扩散屏障减少污染气体释放到环形激光陀螺仪的空腔中和/或吸收空腔中的污染气体。 氧气扩散阻挡层可以在环形激光陀螺仪的组装之前或之后形成在空腔的壁上。 或者，可以将材料施加到安装在环形激光陀螺仪的块体上的阴极的内壁，以保持激光气体的纯度水平。 作为保持激光气体的纯度水平的结果，环形激光陀螺仪操作更有效率。
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