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1. 发明授权

US09329401B2 Variable polarization separation via beam splitter rotation 有权
标题翻译：通过分光器旋转可变偏振分离
公开(公告)号：US09329401B2
公开(公告)日：2016-05-03
申请号：US14119797
申请日：2012-05-21
申请人： Eric E. Sanborn , Mark E. Froggatt
发明人： Eric E. Sanborn , Mark E. Froggatt
IPC分类号： G01B9/02 , G02B27/28 , G02B6/27 , G01J4/00
CPC分类号： G02B27/283 , G01J4/00 , G02B6/2706
摘要： An apparatus for separating polarization of light includes a rotatable beam splitter including an input for receiving light with a first polarization and an output for outputting light with a second polarization different from the first polarization. Rotation of the rotatable beam splitter changes the first polarization of the input light to the second polarization of the output light. An optical network and method are also set forth.
摘要翻译：用于分离光的偏振的装置包括可旋转分束器，包括用于接收具有第一偏振的光的输入和用于输出具有不同于第一偏振的第二偏振的光的输出。可旋转分束器的旋转将输入光的第一偏振改变为输出光的第二偏振。还提出了光网络和方法。

2. 发明授权

US08773650B2 Optical position and/or shape sensing 有权
标题翻译：光学位置和/或形状感测
公开(公告)号：US08773650B2
公开(公告)日：2014-07-08
申请号：US12874901
申请日：2010-09-02
申请人： Mark E. Froggatt , Justin W. Klein , Dawn K. Gifford , Stephen Tod Kreger
发明人： Mark E. Froggatt , Justin W. Klein , Dawn K. Gifford , Stephen Tod Kreger
IPC分类号： G01N21/00 , G01L1/24 , G01B11/16 , G01B11/24 , G02B6/02
CPC分类号： G01B11/24 , G01B11/16 , G01B11/168 , G01B11/18 , G01L1/242 , G01L1/246 , G02B6/02042
摘要： An accurate measurement method and apparatus are disclosed for shape sensing with a multi-core fiber. A change in optical length is detected in ones of the cores in the multi-core fiber up to a point on the multi-core fiber. A location and/or a pointing direction are/is determined at the point on the multi-core fiber based on the detected changes in optical length. The accuracy of the determination is better than 0.5% of the optical length of the multi-core fiber up to the point on the multi-core fiber. In a preferred example embodiment, the determining includes determining a shape of at least a portion of the multi-core fiber based on the detected changes in optical length.
摘要翻译：公开了一种使用多芯光纤进行形状检测的精确测量方法和装置。在多芯光纤中的核心中的多芯光纤上的点之间检测到光学长度的变化。基于检测到的光学长度的变化，在多芯光纤上的点处确定位置和/或指向方向。该测定的精确度优于多核纤维的光学长度的0.5％直到多芯纤维上的点。在优选示例实施例中，确定包括基于检测到的光学长度的变化来确定多芯光纤的至少一部分的形状。

3. 发明授权

US06545760B1 Apparatus and method for measuring strain in optical fibers using rayleigh scatter 有权
标题翻译：用Rayleigh散射测量光纤应变的装置和方法
公开(公告)号：US06545760B1
公开(公告)日：2003-04-08
申请号：US09535659
申请日：2000-03-24
申请人： Mark E. Froggatt , Jason P. Moore
发明人： Mark E. Froggatt , Jason P. Moore
IPC分类号： G01B902
CPC分类号： G01L1/242 , G01K11/32
摘要： An apparatus and method for measuring strain in an optical fiber using the spectral shift of Rayleigh scattered light. The interference pattern produced by an air gap reflector and backscattered radiation is measured. Using Fourier Transforms, the spectrum of any section of fiber can be extracted. Cross correlation with an unstrained measurement produces a correlation peak. The location of the correlation peak indicates the strain level in the selected portion of optical fiber.
摘要翻译：使用瑞利散射光的光谱偏移来测量光纤中的应变的装置和方法。测量由气隙反射器产生的干涉图案和背散射辐射。使用傅里叶变换，可以提取任何光纤段的光谱。与无约束测量的互相关产生相关峰。相关峰的位置表示光纤的所选部分中的应变水平。

4. 发明授权

US06426496B1 High precision wavelength monitor for tunable laser systems 有权
标题翻译：用于可调谐激光系统的高精度波长监视器
公开(公告)号：US06426496B1
公开(公告)日：2002-07-30
申请号：US09648529
申请日：2000-08-22
申请人： Mark E. Froggatt , Brooks A. Childers
发明人： Mark E. Froggatt , Brooks A. Childers
IPC分类号： G01J400
CPC分类号： H01S5/0687 , G01J9/0246 , H01S3/1305 , H01S3/137
摘要： A solid-state apparatus for tracking the wavelength of a laser emission has a power splitter that divides the laser emission into at least three equal components. Differing phase shifts are detected and processed to track variations of the laser emission.
摘要翻译：用于跟踪激光发射波长的固态设备具有将激光发射分成至少三个相等分量的功率分配器。检测和处理不同的相移以跟踪激光发射的变化。

5. 发明授权

US09766131B2 High accuracy, high precision, low drift, and concurrent wavelength measurement of a sweeping tunable laser 有权
公开(公告)号：US09766131B2
公开(公告)日：2017-09-19
申请号：US12735813
申请日：2009-02-20
申请人： Ryan Seeley , Mark E. Froggatt
发明人： Ryan Seeley , Mark E. Froggatt
IPC分类号： G01J9/02
CPC分类号： G01J9/0246
摘要： A tunable laser wavelength measurement system includes an interferometric wavelength tracking system that uses a combination of interferometric and wavelength reference measurements to directly measure the laser output wavelength, The measurement exhibits the following desirable error signal characteristics: directional information, continuity, low latency, absolute information, high accuracy, high precision, and little or no drift, A tunable laser wavelength control system additionally incorporates electronics to compare the measured laser wavelength to a desired wavelength or wavelength function, and to generate a feedback control signal to control the wavelength of the laser output based on the comparison. In one non-limiting example implementation, the desired wavelength function is repetitive. The difference between the desired wavelength function and the interferometrically-measured wavelength function is taken, and a successive approximation technique is employed to calculate and adjust a repetitive controlling signal to obtain the desired wavelength function.

6. 发明授权

US07772541B2 Fiber optic position and/or shape sensing based on rayleigh scatter 有权
标题翻译：基于Rayleigh散射的光纤位置和/或形状感测
公开(公告)号：US07772541B2
公开(公告)日：2010-08-10
申请号：US12047056
申请日：2008-03-12
申请人： Mark E. Froggatt , Roger G. Duncan
发明人： Mark E. Froggatt , Roger G. Duncan
IPC分类号： G01N21/25 , G01J3/50
CPC分类号： A61B1/00165 , A61B5/065 , A61B5/6852 , A61B2034/2061 , A61B2034/301 , G01D5/35316 , G01D5/3539 , G01M11/083 , G02B6/02042 , G02B6/022
摘要： A fiber optic position and/or shape sensing device includes an optical fiber with either two or more single core optical fibers or a multi-core optical fiber having two or more fiber cores. In either case, the fiber cores are spaced apart so that mode coupling between the fiber cores is reduced, and preferably, minimized. The optical fiber is physically associated with an object. Strain on at least a portion of the optical fiber where it is associated with the object is determined by an OFDR using one or more Rayleigh scatter patterns for that portion of the optical fiber. The determined strain is used to determine a position and/or a shape of the object.
摘要翻译：光纤位置和/或形状检测装置包括具有两个或多个单芯光纤的光纤或具有两个或更多个光纤芯的多芯光纤。在任一种情况下，纤维芯间隔开，使得纤维芯之间的模式耦合减小，并且优选地最小化。光纤与物体物理相关。在与物体相关联的光纤的至少一部分上的应变由OFDR使用对于该光纤的该部分使用一个或多个瑞利散射图来确定。确定的应变用于确定物体的位置和/或形状。

7. 发明申请

US20080212082A1 FIBER OPTIC POSITION AND/OR SHAPE SENSING BASED ON RAYLEIGH SCATTER 有权
标题翻译：基于RAYLEIGH散射器的光纤位置和/或形状感测
公开(公告)号：US20080212082A1
公开(公告)日：2008-09-04
申请号：US12047056
申请日：2008-03-12
申请人： Mark E. FROGGATT , Roger G. DUNCAN
发明人： Mark E. FROGGATT , Roger G. DUNCAN
IPC分类号： G01N21/00
CPC分类号： A61B1/00165 , A61B5/065 , A61B5/6852 , A61B2034/2061 , A61B2034/301 , G01D5/35316 , G01D5/3539 , G01M11/083 , G02B6/02042 , G02B6/022
摘要： A fiber optic position and/or shape sensing device includes an optical fiber with either two or more single core optical fibers or a multi-core optical fiber having two or more fiber cores. In either case, the fiber cores are spaced apart so that mode coupling between the fiber cores is reduced, and preferably, minimized. The optical fiber is physically associated with an object. Strain on at least a portion of the optical fiber where it is associated with the object is determined by an OFDR using one or more Rayleigh scatter patterns for that portion of the optical fiber. The determined strain is used to determine a position and/or a shape of the object.
摘要翻译：光纤位置和/或形状检测装置包括具有两个或多个单芯光纤的光纤或具有两个或更多个光纤芯的多芯光纤。在任一种情况下，纤维芯间隔开，使得纤维芯之间的模式耦合减小，并且优选地最小化。光纤与物体物理相关。在与物体相关联的光纤的至少一部分上的应变由OFDR使用对于该光纤的该部分使用一个或多个瑞利散射图来确定。确定的应变用于确定物体的位置和/或形状。

8. 发明授权

US07042573B2 Apparatus and method for the complete characterization of optical devices including loss, birefringence and dispersion effects 有权
标题翻译：用于完整表征光学器件的装置和方法，包括损耗，双折射和色散效应
公开(公告)号：US07042573B2
公开(公告)日：2006-05-09
申请号：US10990966
申请日：2004-11-18
申请人： Mark E. Froggatt
发明人： Mark E. Froggatt
IPC分类号： G01B9/02
CPC分类号： G01M11/331 , G01M11/3181
摘要： In order to characterize the optical characteristics of a device, a source of light having a variable frequency with a polarization state which varies linearly with frequency is provided as an input to the device under test. The input light is also passed through a known reference path and is added to the light output from the device under test in a beam combiner. The combined light for the frequencies of interest is split into two orthogonal polarizations which are then detected in a spectral acquisition apparatus and supplied to a microprocessor. The spectral measurements are digitized and curve-fitted to provide optical power versus optical frequency curves. Fourier transforms of each of the curves are calculated by the microprocessor. From the Fourier transforms, the four arrays of constants are calculated for the Jones matrix characterizing the device under test.
摘要翻译：为了表征器件的光学特性，提供具有频率变化的偏振状态的可变频率的光源作为被测器件的输入。输入光也通过已知的参考路径，并且被加入到在光束组合器中被测器件的光输出。将感兴趣频率的组合光分成两个正交极化，然后在光谱采集装置中检测并提供给微处理器。光谱测量数字化并进行曲线拟合，以提供光功率与光频率曲线。每个曲线的傅立叶变换由微处理器计算。从傅立叶变换中，为表征被测器件的琼斯矩阵计算出四个常数阵列。

9. 发明授权

US06900897B2 Apparatus and method for correcting errors generated by a laser with non-ideal tuning characteristics 有权
标题翻译：用于校正具有非理想调谐特性的激光器产生的误差的装置和方法
公开(公告)号：US06900897B2
公开(公告)日：2005-05-31
申请号：US10816517
申请日：2004-04-01
申请人： Mark E. Froggatt
发明人： Mark E. Froggatt
IPC分类号： G01B9/02 , G01J9/02 , G01M11/00 , G01N20060101 , G01N21/00
CPC分类号： G01J9/0246 , G01M11/331
摘要： The present invention is an apparatus and method for correcting errors generated by a laser with non-ideal tuning characteristics, the apparatus comprises a laser having non-ideal tuning characteristics. At least three interferometers are positioned in an operable relationship to the laser, wherein a sampling interferometer and at least one auxiliary interferometer correct for residual errors resulting from the laser; and wherein a measurement interferometer makes a measurement. A signal acquisition system is positioned in an operable relationship to each interferometer and a processor is positioned in an operable relationship to the signal acquisition system.
摘要翻译：本发明是用于校正具有非理想调谐特性的激光器产生的误差的装置和方法，该装置包括具有非理想调谐特性的激光器。至少三个干涉仪位于与激光器可操作的关系中，其中采样干涉仪和至少一个辅助干涉仪校正由激光产生的残余误差; 并且其中测量干涉仪进行测量。信号采集系统被定位成与每个干涉仪可操作的关系，并且处理器被定位成与信号采集系统可操作的关系。

10. 发明授权

US5841032A Variable and fixed frequency pulsed phase locked loop 失效
标题翻译：可变和固定频率脉冲锁相环
公开(公告)号：US5841032A
公开(公告)日：1998-11-24
申请号：US792909
申请日：1997-01-24
申请人： Mark E. Froggatt
发明人： Mark E. Froggatt
IPC分类号： G01N29/07 , G01N29/22 , G01N29/34 , G01N29/18
CPC分类号： G01N29/227 , G01N29/075 , G01N29/348 , G01N2291/012 , G01N2291/02872 , G01N2291/2691
摘要： A measuring apparatus uses a variable and fixed frequency pulsed phase locked loop to measure the phase shift caused by a delay path to a high degree of accuracy. This accurate measurement of total phase change through greater than 360 degrees allows the apparatus to measure strain in bolts or other materials. The apparatus is able to identify features on a waveform through pattern recognition, and measure untracked phase differences with better reliability than simple thresholding techniques permit.
摘要翻译：测量装置使用可变和固定频率脉冲锁相环来以高精度测量由延迟路径引起的相移。通过大于360度的这种精确的总相位变化测量，可以使装置测量螺栓或其他材料中的应变。该装置能够通过模式识别识别波形上的特征，并且比简单的阈值技术允许的更好的可靠性测量未跟踪的相位差。

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