公开(公告)号：US5255068A

公开(公告)日：1993-10-19

申请号：US796743

申请日：1991-11-25

申请人： Stephen M. Emo ,  Devlin M. Gualtieri ,  Janpu Hou ,  Terrance R. Kinney ,  Robert C. Morris ,  Herman van de Vaart

发明人： Stephen M. Emo ,  Devlin M. Gualtieri ,  Janpu Hou ,  Terrance R. Kinney ,  Robert C. Morris ,  Herman van de Vaart

IPC分类号： G01J5/08 ,  G01J5/58 ,  G01K11/12 ,  G01B9/02

CPC分类号： G01K11/12

摘要： A sensor for use in an optical temperature detector system having a birefringent element made of a single crystal metal oxide plate. A broad band light spectrum is transmitted through a first linear polarizing element to create a linearly polarized wave. The linearly polarized wave on passing through the single crystal metal oxide plate decomposes into first and second orthogonally polarized waves. Propagation of the linearly polarized wave through the birefringent single crystal metal oxide plate introduces a temperature dependent phase shift between the two waves. Thereafter, a second linear polarizer combines the first and second orthogonally polarized waves to create a modulated light spectrum having a fringe pattern, the fringe pattern being a function of the current temperature experienced by said birefringent element. A fiber optic cable connected to the second linear polarizing element carries the modulated light spectrum to an opto-electronic interface where the fringe pattern is extracted and a computer compatible signal is generated for a CPU to accurately indicate current environmental temperature conditions up to 1000.degree. C. experienced by the single crystal plate crystal in the birefringent element.

摘要翻译： 一种用于具有由单晶金属氧化物板制成的双折射元件的光学温度检测器系统的传感器。 宽带光谱通过第一线性偏振元件透射以产生线偏振波。 通过单晶金属氧化物板的线偏振波分解成第一和第二正交极化波。 通过双折射单晶金属氧化物板的线偏振波的传播在两个波之间引入温度相关的相移。 此后，第二线性偏振器组合第一和第二正交极化波，以产生具有条纹图案的调制光谱，该条纹图案是由所述双折射元件所经历的当前温度的函数。 连接到第二线性偏振元件的光纤电缆将调制的光谱传送到光电接口，其中提取条纹图案，并且为CPU产生计算机兼容信号以准确地指示当前最高1000℃的环境温度条件 由双折射元件中的单晶板晶体经历。

公开(公告)号：US5175787A

公开(公告)日：1992-12-29

申请号：US797009

申请日：1991-11-25

申请人： Devlin M. Gualtieri ,  Janpu Hou ,  Robert C. Morris ,  Herman van de Vaart

发明人： Devlin M. Gualtieri ,  Janpu Hou ,  Robert C. Morris ,  Herman van de Vaart

IPC分类号： G02B6/12 ,  G02B6/02 ,  G02B6/122 ,  G02B6/13

CPC分类号： G02B6/131 ,  G02B6/02 ,  G02B6/122

摘要： This invention provides birefringent optical waveguide structures of crystalline aluminum garnet of a high refractive index which are clad with crystalline aluminum garnet of a lower refractive index. Due to predetermined lattice mismatch between garnet substrate and cladding layer, strain is induced which causes a stress with resultant birefringence in the waveguide layer. When linearly polarized light enters such stressed waveguide in certain orientations, the linear polarization will be preserved by the stress-induced birefringence. These birefringent clad waveguides can be in the form of slabs, channels, ribs, or any of the typical optical waveguide structures. They are useful at high temperature.

摘要翻译： 本发明提供了具有较低折射率的结晶铝石榴石包覆的具有高折射率的结晶铝石榴石的双折射光波导结构。 由于石榴石基体和包覆层之间的预定晶格失配，引起应变，导致在波导层中产生双折射的应力。 当线性偏振光在某些取向进入这种应力波导时，线偏振将由应力引起的双折射保持。 这些双折射包层波导可以是板，通道，肋或任何典型的光波导结构的形式。 它们在高温下很有用。

公开(公告)号：US5694205A

公开(公告)日：1997-12-02

申请号：US545455

申请日：1995-10-19

申请人： Devlin M. Gualtieri ,  Janpu Hou ,  William R. Rapoport ,  Herman Van de Vaart

发明人： Devlin M. Gualtieri ,  Janpu Hou ,  William R. Rapoport ,  Herman Van de Vaart

IPC分类号： G01L1/24

CPC分类号： G01L1/241

摘要： A birefringent bias is provided to an optical sensor by the addition of one or more single birefringent elements where the total birefringence-length product remains within the accepted tolerances of current devices. The bias provided by two or more elements is such that where each element has a birefringence, a dB/dT and a coefficient of thermal expansion term, the elements are arranged in tandem so that the combined birefringence terms equal the required birefringence bias and the dB/dT and coefficient of thermal expansion terms effectively cancel.

摘要翻译： 通过添加一个或多个单双折射元件向光学传感器提供双折射偏置，其中总双折射长度乘积保持在当前器件的公认误差范围内。 由两个或更多个元件提供的偏压使得当每个元件具有双折射，dB / dT和热膨胀项的系数时，元件串联布置，使得组合双折射项等于所需的双折射偏差和dB / dT和热膨胀系数有效地消除。