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公开(公告)号：US07561275B2
公开(公告)日：2009-07-14
申请号：US11576838
申请日：2005-10-06
IPC分类号： G01C19/66
CPC分类号： G01C19/66
摘要： A laser cavity optical architecture of a solid-state laser gyro measures rotational velocity or angular position and is based on a global conservation of the scale factor so that each parameter varies with temperature and avoids optical mode hops.
摘要翻译： 固态激光陀螺仪的激光腔光学架构测量旋转速度或角度位置，并且基于比例因子的全局守恒，使得每个参数随温度变化并避免光学模式跳跃。
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公开(公告)号：US20080037026A1
公开(公告)日：2008-02-14
申请号：US11576838
申请日：2005-10-06
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 for measuring rotational velocities or angular positions. This type of equipment is used in particular for aeronautical applications. The performance of a laser gyro depends on the temperature stability of its scale factor S which equals 4A/λ·L, L and A being respectively the optical length and the area of the laser cavity and λ the average wavelength of laser emission with no Sagnac effect. Conventionally, in gas lasers, each parameter of the scale factor is chosen so as to be independent of temperature. In solid-state lasers which are of a very different nature to that of gas lasers, it is not possible to do this. The invention proposes a laser cavity optical architecture based on the global conservation of the scale factor, it being possible for each parameter to vary with temperature. It also proposes an architecture that makes it possible at the same time to avoid optical mode hops. Several numerical examples showing that the principles according to the invention can be applied to standard materials are provided.
摘要翻译： 本发明的领域是用于测量旋转速度或角位置的固态激光陀螺仪。 这种类型的设备特别用于航空应用。 激光陀螺的性能取决于其比例因子S的温度稳定性，其等于4A / lambda.L，L和A分别是光学长度和激光腔的面积，λ是没有Sagnac的激光发射的平均波长 影响。 通常，在气体激光器中，选择比例因子的每个参数以与温度无关。 在与气体激光器性质非常不同的固态激光器中，不可能这样做。 本发明提出了一种基于缩放因子全局守恒的激光腔光学架构，每个参数可能随温度而变化。 它还提出了一种可以同时避免光模式跳跃的架构。 提供了几个数字示例，其示出了根据本发明的原理可以应用于标准材料。
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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：US20080043225A1
公开(公告)日：2008-02-21
申请号：US11840868
申请日：2007-08-17
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的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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公开(公告)号：US20100123901A1
公开(公告)日：2010-05-20
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
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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公开(公告)号：US20090116031A1
公开(公告)日：2009-05-07
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
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：US07474406B2
公开(公告)日：2009-01-06
申请号：US10582629
申请日：2004-11-23
IPC分类号： G01C19/64
摘要： The field of the invention is that of solid-state laser gyros. One of the major inherent problems in this technology is that the optical emission of this type of laser is by nature highly unstable in terms of power. To reduce this instability, the invention proposes to introduce, into the cavity, optical gains controlled by the installation of an optical assembly comprising an anisotropic lasing medium, a first optical element and a second optical element exhibiting a nonreciprocal effect, each acting on the polarization of the counterpropagating optical modes, at least one of these two effects being variable, thus making it possible to introduce controlled optical gains that depend on the propagation direction of the counterpropagating optical modes. Several devices are described and employ either fixed effects of the element that are combined with variable nonreciprocal effects, or the reverse. These devices apply in particular to monolithic-cavity lasers.
摘要翻译： 本发明的领域是固体激光陀螺仪的领域。 该技术的主要固有问题之一是这种类型的激光器的光发射本质上在功率方面非常不稳定。 为了减少这种不稳定性，本发明提出通过安装包括各向异性激光介质，第一光学元件和第二光学元件的光学组件控制的光学增益，所述光学组件具有非相互作用，各自作用于极化 的相反传播光模式中，这两个效果中的至少一个效果是可变的，从而使得可以引入取决于反向传播光学模式的传播方向的受控光学增益。 描述了几个装置，并且采用与可变非互逆效应组合的元件的固定效应，或者相反。 这些器件特别适用于单片腔激光器。
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公开(公告)号：US20060176927A1
公开(公告)日：2006-08-10
申请号：US10526610
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 lasers, using specific optic devices that eliminate the blind region. In this way, a “fully optic” solid-state laser is obtained, without moving parts, stable, and without blind regions. These devices comprise in particular reciprocal and nonreciprocal optical rotators, arranged so that two counter-propagating 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。 本发明的目的是使用消除盲区的特定光学装置来完成控制激光器不稳定性所需的光学装置。 以这种方式，获得“全光学”固态激光器，无需移动部件，稳定且无盲区。 这些装置尤其包括倒数和不可逆光旋转器，其布置成使得两个反向传播的光学模式以足够不同的频率在空腔中行进以避免模式锁定。
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