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1. 发明授权

US06233070B1 Optical system and method for changing the lengths of optical paths and the phases of light beams 失效
标题翻译：用于改变光路长度和光束相位的光学系统和方法
公开(公告)号：US06233070B1
公开(公告)日：2001-05-15
申请号：US09137399
申请日：1998-08-20
申请人： Yicheng Lu , Ralf-Dieter Pechstedt
发明人： Yicheng Lu , Ralf-Dieter Pechstedt
IPC分类号： G02F1259
CPC分类号： G02F1/2257 , G02F2201/126
摘要： An optical system comprises two optical paths P1, P2, and an optical path changer for changing the optical length of the two optical paths. The optical path changer includes two phase modulators M1, M2 one coupled to each of the paths. A driving system is configured to apply power to the phase modulators to drive them in the same direction and to change the power applied to the phase modulators in opposite directions so as to change the length of each optical path in a different direction. As a result, the relationship between the changes in the power applied to the phase modulators and the resulting changes in the phase of light beams passing through the optical system becomes substantially linear.
摘要翻译：光学系统包括两个光路P1，P2和用于改变两个光路的光学长度的光路改变器。光路改变器包括耦合到每个路径的两个相位调制器M1，M2。驱动系统被配置为向相位调制器施加功率以在相同方向上驱动它们，并且以相反方向改变施加到相位调制器的功率，以便改变沿不同方向的每个光路的长度。结果，施加到相位调制器的功率的变化与通过光学系统的光束的相位变化之间的关系变得基本上是线性的。

2. 发明授权

US6163632A Integrated optical circuit 失效
标题翻译：集成光电路
公开(公告)号：US6163632A
公开(公告)日：2000-12-19
申请号：US158795
申请日：1998-09-23
申请人： Andrew George Rickman , Arnold Peter Roscoe Harpin , Ralf-Dieter Pechstedt , James Stuart McKenzie
发明人： Andrew George Rickman , Arnold Peter Roscoe Harpin , Ralf-Dieter Pechstedt , James Stuart McKenzie
IPC分类号： G01C19/72 , G02B6/12 , G02B6/28 , G02F1/025
CPC分类号： G02B6/12004 , G01C19/722 , G02B2006/12119 , G02B2006/2865 , G02F1/025
摘要： An integrated optical circuit for use in a fibre optic gyroscope which senses rotation rates by determining a phase shift due to the Sagnac Effect between light beams travelling around an optical fibre sensing loop (4) in opposite directions, the circuit being provided on a silicon-on-insulator chip comprising a layer of silicon separated from a substrate by an insulating layer, the circuit comprising: rib waveguides (11) formed in the silicon layer for receiving light from a light source (2) and transmitting light to a light detector (3), fibre optic connectors (9) in the form of grooves etched in the silicon layer for receiving the respective ends of the optical fibre sensing loop (4); rib waveguides (11) formed in the silicon layer for transmitting light to and from said fibre optic connectors (9) so as to direct light beams in opposite directions around the sensing loop (4) and receive light beams returning therefrom, phase determining means and (13,17,31) integrated in silicon layer for determining a phase shift between the light beams returning from the sensing loop (4).
摘要翻译：一种用于光纤陀螺仪的集成光学电路，其通过在相反方向上确定在光纤传感环路（4）周围传播的光束之间的Sagnac效应确定相移来感测旋转速率，该电路设置在硅 - 绝缘体芯片，包括通过绝缘层从衬底分离的硅层，所述电路包括：形成在硅层中的肋波导（11），用于接收来自光源（2）的光并将光传输到光检测器（ 3），在硅层中蚀刻的凹槽形式的光纤连接器（9），用于接收光纤感测回路（4）的相应端部; 形成在所述硅层中的肋波导（11），用于将光传送到所述光纤连接器（9）并从所述光纤连接器（9）发射光，以便沿着所述感测环路（4）周围的相反方向引导光束，并且接收从其返回的光束，相位确定装置和（13,17,31），其集成在硅层中，用于确定从感测回路（4）返回的光束之间的相移。

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