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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：US07548572B2
公开(公告)日：2009-06-16
申请号：US10550514
申请日：2004-03-23
IPC分类号： H01S3/083
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：US08379216B2
公开(公告)日：2013-02-19
申请号：US12617599
申请日：2009-11-12
申请人： Sylvain Schwartz , Gilles Feugnet , Francois Gutty , Etienne Bonnaudet , Mehdi Alouini , Jean-Paul Pocholle
发明人： Sylvain Schwartz , Gilles Feugnet , Francois Gutty , Etienne Bonnaudet , Mehdi Alouini , Jean-Paul Pocholle
IPC分类号： G01C19/64
CPC分类号： G01C19/66 , G01C19/665
摘要： The general field of the invention is that of gyrolasers comprising at least one ring-shaped optical cavity comprising at least three mirrors, a solid state amplifying medium pumped by a laser diode whose optical emission power is determined by a current supply source, the cavity and the amplifying medium being such that two so-called contra-rotating optical modes propagate in opposite directions to each other within the said optical cavity, the gyrolaser being a class B gyrolaser, the gyrolaser also comprising means of measuring the difference in optical frequency existing between the two optical modes. The gyrolaser comprises means of measuring the total optical power circulating in the optical cavity and first means of control of the current delivered by the supply source in such a way as to maintain the total optical power substantially constant in a narrow spectral band centred on the relaxation frequency of the laser.
摘要翻译： 本发明的一般领域是包括至少一个包括至少三个反射镜的环形光腔的陀螺仪，由激光二极管泵浦的固态放大介质，其发射功率由电流源确定，腔和 所述放大介质使得两个所谓的反向旋转光学模式在所述光学腔内彼此相反的方向传播，所述陀螺仪是B类陀螺仪，陀螺仪还包括测量存在于 两种光模式。 陀螺仪包括测量在光腔中循环的总光功率的装置以及由供电源传送的电流的第一控制装置，以便在以松弛为中心的窄光谱带中保持总光功率基本上恒定 激光的频率。
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公开(公告)号：US20110194119A1
公开(公告)日：2011-08-11
申请号：US12097429
申请日：2006-12-07
IPC分类号： G01C19/68
CPC分类号： G01C19/68
摘要： The field of the invention is that of solid-state laser gyros used for the measurements of rotation speed or relative angular positions. This type of equipment is notably used for aeronautical applications. The object of the invention is to complete the optical devices necessary to control the instability of lasers by specific optical devices enabling elimination of the dead zone and of population inversion gratings exiting in the amplifying medium. An “all optical” solid-state laser is hence obtained without moveable parts, stable and without a dead zone. To this end, the laser gyro according to the invention comprises notably and optical assembly enabling a nonreciprocal optical phase-shift to be introduced between the counterpropagating modes; and control means allowing the phase-shift amplitude to be varied periodically around a mean value that is very approximately zero.
摘要翻译： 本发明的领域是用于测量转速或相对角度位置的固体激光陀螺仪。 这种类型的设备特别用于航空应用。 本发明的目的是完成通过特定光学装置来控制激光器的不稳定性所需的光学装置，从而能够消除在放大介质中退出的死区和群体反转光栅。 因此，“全光学”固体激光器不具有稳定且没有死区的可移动部件。 为此，根据本发明的激光陀螺仪特别包括能够在反向传播模式之间引入不可逆光学相移的光学组件; 以及允许相移幅度围绕非常近似为零的平均值周期性地变化的控制装置。
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公开(公告)号：US07589841B2
公开(公告)日：2009-09-15
申请号：US11840868
申请日：2007-08-17
IPC分类号： G01C19/64
CPC分类号： G01C19/66
摘要： The field of the invention is that of solid-state ring lasers or laser gyros. The laser gyro according to the invention comprises at least one optical cavity in the form of a ring and a solid-state amplifying medium which are designed so that two counterpropagating optical modes can propagate in opposite directions one with respect to the other inside said optical cavity and pass through the amplifying medium, said amplifying medium being coupled to an electromechanical device imparting on said amplifying medium a periodic translational movement along an axis substantially parallel to the direction of propagation of said optical modes. Thus, the population inversion grating, written by the standing wave into the amplifying medium, which disturbs the nominal operation of the laser gyro, is greatly attenuated.
摘要翻译： 本发明的领域是固态环形激光器或激光陀螺仪。 根据本发明的激光陀螺仪包括至少一个呈环状的光腔和固态放大介质，其被设计成使得两个反向传播的光学模式可以相对于所述光学腔内的另一个在相反的方向上传播 并且通过放大介质，所述放大介质耦合到机电装置，其赋予所述放大介质沿着基本上平行于所述光模的传播方向的轴的周期性平移运动。 因此，通过驻波写入到放大介质中，扰乱激光陀螺仪的标称操作的群体反转光栅被大大衰减。
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6.发明授权Multi-oscillator solid-state laser gyro passively stabilized by a frequency-doubling crystal device 失效多振荡器固态激光陀螺被被倍频晶振器件无源稳定公开(公告)号：US08587788B2
公开(公告)日：2013-11-19
申请号：US13102741
申请日：2011-05-06
CPC分类号： G01C19/667
摘要： A laser gyro for measuring the angular velocity or the angular position relative to a defined rotation axis includes: an optical ring cavity; a solid-state amplifying medium; and a non-reciprocal magneto-optic device; which are arranged so that four linearly polarized propagation modes can propagate within the cavity, the magneto-optic device introducing a frequency bias between the modes propagating in a first direction and the modes propagating in the opposite direction. In the device, the cavity also includes a stabilizer device for stabilizing the intensity of the four propagation modes at substantially equivalent levels, said device comprising at least one optical element made of a non-linear crystal of the frequency-doubling type.
摘要翻译： 用于测量相对于限定旋转轴线的角速度或角位置的激光陀螺仪包括：光环腔; 固态放大介质; 和不可逆磁光器件; 其布置成使得四个线性极化传播模式可以在腔内传播，磁光器件在沿第一方向传播的模式和沿相反方向传播的模式之间引入频率偏置。 在该装置中，空腔还包括稳定装置，用于以基本相同的水平稳定四种传播模式的强度，所述装置包括至少一个由倍频型的非线性晶体制成的光学元件。
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公开(公告)号：US20110071787A1
公开(公告)日：2011-03-24
申请号：US12820940
申请日：2010-06-22
CPC分类号： G01C19/66
摘要： Solid-state gyrolaser having a device for stabilizing the intensities making it possible to maintain equilibrium of the two counter-propagating modes having at least a means for calculating a rotation measurement (Ω, IΩ) of the gyrolaser on the basis of the counter-propagating modes having a frequency difference (Δνmes) between them, by assuming that the frequency difference (Δνmes) between the two counter-propagating modes is induced only by the rotation of the cavity. The gyrolaser also includes a means for measuring the control command (Co), a means for storing a behaviour model (Mo) of a frequency bias (Δνb) induced by the device for stabilizing the intensities, as a function of the control command, a means for calculating the frequency bias (Δνb) induced by the device for stabilizing the intensities, on the basis of the value of the control command (Co) and the model (Mo), a means for calculating the bias (ΔΩb, ΔIΩb) in the rotation measurement (Ω, IΩ), induced by the frequency bias (Δνb), and a means for compensating for the bias (ΔΩb, ΔIΩb) in the rotation measurement (Ω, IΩ).
摘要翻译： 固体陀螺仪具有用于稳定强度的装置，使得可以保持两个反向传播模式的平衡，其具有至少一种用于基于计数器计算陀螺仪的旋转测量（＆amp; OHgr，I＆OHgr）的装置 通过假设两个反向传播模式之间的频率差（＆Dgr;＆ngr; mes）仅由腔的旋转引起，它们之间具有频率差（＆Dgr;＆sgr; mes）的传播模式。 陀螺仪还包括用于测量控制命令（Co）的装置，用于存储由装置引起的用于稳定强度的频率偏差（＆Dgr;＆ngr; b）的行为模型（Mo）的装置，作为 控制指令，用于根据控制指令（Co）和模型（Mo）的值计算用于稳定强度的装置引起的频率偏差（＆Dgr;＆ngr; b）的装置，用于计算 偏置（＆Dgr;＆OHgr; b，＆Dgr; I＆OHgr; b）在频率偏差（＆Dgr;＆ngr; b）诱发的旋转测量（＆OHgr; I＆OHgr;）中）和补偿偏差 ;＆OHgr; b，＆Dgr; I＆OHgr; b）在旋转测量（＆OHgr; I＆OHgr）中。
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公开(公告)号：US07710575B2
公开(公告)日：2010-05-04
申请号：US12097367
申请日：2006-12-07
申请人： Sylvain Schwartz , Gilles Feugnet , Jean-Paul Pocholle , Augustin Mignot , Bastien Steinhausser
发明人： Sylvain Schwartz , Gilles Feugnet , Jean-Paul Pocholle , Augustin Mignot , Bastien Steinhausser
IPC分类号： G01C19/64
CPC分类号： G01C19/66
摘要： The field of the invention is that of solid-state laser gyros used in inertial control units. However, there are certain technical difficulties in producing laser gyros of this type that are due partly to the fact that the counterpropagating waves interfere with each other in the amplifying medium. A laser gyro according to the invention comprises at least one solid-state amplifying medium and an optical ring cavity comprising first optical means for imposing a first linear polarization state common to the two counterpropagating optical waves at the entrance and exit of the zone containing the amplifying medium and second optical means for imposing, within the amplifying medium, a second linear polarization state on the first optical wave and a third linear polarization state on the second optical wave, these polarization states being perpendicular. Thus, all the drawbacks associated with interference are eliminated.
摘要翻译： 本发明的领域是用于惯性控制单元的固体激光陀螺仪。 然而，在制造这种类型的激光陀螺仪方面存在某些技术上的困难，部分原因是反向传播波在放大介质中彼此干扰。 根据本发明的激光陀螺仪包括至少一个固态放大介质和光环腔，其包括第一光学装置，用于在包含放大器的区域的入口和出口处施加与两个反向传播光波共同的第一线性极化状态 中等和第二光学装置，用于在放大介质内施加第一光波上的第二线性偏振状态和第二光波上的第三线偏振状态，这些偏振状态是垂直的。 因此，消除了与干扰相关联的所有缺陷。
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公开(公告)号：US07230686B1
公开(公告)日：2007-06-12
申请号：US10526611
申请日：2005-03-16
CPC分类号： G01C19/66
摘要： The invention concerns solid-state gyrolasers used to measure rotation speeds or relative angular positions. This type of equipment is used, in particular, in aeronautical applications.The purpose of the invention is to complete the optic devices required to control the instability of ring-shaped solid-state lasers using specific optic devices that eliminate the blind region without adding a measurement bias. In this way, a “fully optic” solid-state laser is obtained, without moving parts, stable, and without blind region.These devices comprise in particular polarization separation optical devices, reciprocal and nonreciprocal optical rotators arranged so that four linearly polarized optical modes travel in the cavity at sufficiently different frequencies to avoid mode locking.
摘要翻译： 本发明涉及用于测量转速或相对角度位置的固态陀螺仪。 这种类型的设备特别用于航空应用中。 本发明的目的是完成使用消除盲区而不增加测量偏压的特定光学器件来控制环形固态激光器的不稳定性所需的光学器件。 以这种方式，获得“全光学”固态激光器，而无需移动部件，稳定且无盲区。 这些装置特别地包括偏振分离光学装置，布置为使得四个线性偏振光学模式在空腔中以足够不同的频率行进以避免模式锁定的倒数和非互逆光学旋转器。
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10.发明授权公开(公告)号：US08576403B2
公开(公告)日：2013-11-05
申请号：US13126437
申请日：2009-10-26
申请人： François Gutty , Gilles Feugnet , Sylvain Schwartz
发明人： François Gutty , Gilles Feugnet , Sylvain Schwartz
IPC分类号： G01C19/66
摘要： A laser gyro having a solid-state amplifying medium and an optical ring cavity includes an assembly encompassing the optical cavity and able to experience an oscillating rotational motion, as well as at least one external optical device for longitudinal injection of energy into the solid-state amplifying medium. The laser gyro also includes a fixing assembly adapted for translationally and rotationally binding said assembly encompassing the optical cavity and said external optical device for longitudinal injection of energy.
摘要翻译： 具有固态放大介质和光环腔的激光陀螺仪包括包围光腔并能够经受振荡旋转运动的组件，以及用于将能量纵向注入固态的至少一个外部光学装置 放大介质。 激光陀螺仪还包括固定组件，其适于平移和旋转地结合包围光学腔的所述组件和所述外部光学装置，用于纵向注入能量。
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