公开(公告)号：US20110280277A1

公开(公告)日：2011-11-17

申请号：US12735356

申请日：2009-01-17

申请人： Lee Chung ,  Kalar Kent ,  Mahesh Ajgaonkar ,  Michael Sanders

发明人： Lee Chung ,  Kalar Kent ,  Mahesh Ajgaonkar ,  Michael Sanders

IPC分类号： G01N21/47 ,  G01K3/00 ,  G01K11/32

CPC分类号： G01K11/32

摘要： Systems and methods for extending the range of a fiber optic DTS system are provided. In one respect, a method may provide steps for transmitting, in a first time period, an optical signal at a first energy level through an optical fiber, collecting backscatter signals as a result of the first transmission, adjusting the first energy level to a second energy level, transmitting, in an additional time period, the adjusted optical signal through the optical fiber, collecting backscatter signals as a result of the adjusted transmissions, and using a portion of the collected backscatter as a result of the first transmission and a portion of the collected backscatter as a result of the additional transmissions, determining one or more parameter profiles, such as a temperature profile.

摘要翻译： 提供了用于扩展光纤DTS系统范围的系统和方法。 在一个方面，一种方法可以提供在第一时间段内通过光纤在第一能级发射光信号的步骤，作为第一传输的结果收集反向散射信号，将第一能级调整到第二能级 能量水平，在额外的时间段内通过光纤传输经调整的光信号，作为经调整的传输的结果收集后向散射信号，并且作为第一次传输的结果使用收集的反向散射的一部分， 作为附加传输的结果的收集的反向散射，确定一个或多个参数分布，诸如温度分布。

公开(公告)号：US20070278389A1

公开(公告)日：2007-12-06

申请号：US11445514

申请日：2006-06-02

申请人： Mahesh Ajgaonkar ,  Gerard Alphonse

发明人： Mahesh Ajgaonkar ,  Gerard Alphonse

IPC分类号： G06M7/00

CPC分类号： G01B9/0205 ,  G01B9/02028 ,  G01B9/0209 ,  G01B2290/70

摘要： A multi-channel low coherence interferometer having sensing and reference arms, at least one of which has variable delay. The sensing arm includes an optical switch for connecting to two or more probe arms. The distal ends of the probe arms collect source light backscattered from a sample. The backscattered light collected by the distal end of a probe arm is combined with reference light and a low coherence interferometric signal is produced by a sweep of a variable delay of the device or a sweep of a variable frequency laser light source. The interference signal produced by the interaction of reference and sensing light at a detector measures backscattered light, which may be used to characterize the sample. The low coherence interferometric signals can provide information about the morphology, physical nature, composition, and properties of the sample. The device may be used to discriminate between finished surfaces and corroded surfaces, healthy and diseased tissue, and can sample the material or tissue in two or more areas. Versions of the invention include devices that are interferometers and or autocorrelators.

摘要翻译： 具有感测和参考臂的多通道低相干干涉仪，其中至少一个具有可变的延迟。 感测臂包括用于连接到两个或更多个探针臂的光学开关。 探头臂的远端收集从样品反向散射的光源。 由探针臂的远端收集的背散射光与参考光结合，并且通过扫描可变延迟器件或扫描可变频率激光光源来产生低相干干涉信号。 在检测器处的​​参考和感测光的相互作用产生的干涉信号测量可以用于表征样品的反向散射光。 低相干干涉信号可以提供关于样品的形态，物理性质，组成和性质的信息。 该装置可以用于区分完成的表面和腐蚀的表面，健康和患病组织，并且可以在两个或更多个区域中对材料或组织进行采样。 本发明的版本包括作为干涉仪和/或自相关器的装置。

公开(公告)号：US20080262442A1

公开(公告)日：2008-10-23

申请号：US11736265

申请日：2007-04-17

申请人： Donald B. Carlin ,  Gerard A. Alphonse ,  Mahesh Ajgaonkar ,  Alexandru Paunescu

发明人： Donald B. Carlin ,  Gerard A. Alphonse ,  Mahesh Ajgaonkar ,  Alexandru Paunescu

IPC分类号： A61M5/00

CPC分类号： A61B5/1076 ,  A61B2562/228

摘要： Connectors and linking components for a guidewire probe having multiple optical emitting fibers and methods of making connectors and linking components for guidewire probes having multiple optical emitting fibers are described herein.

摘要翻译： 本文描述了用于具有多个发光纤维的导丝探针的连接器和连接部件以及用于制造具有多个发光纤维的导丝探针的连接器和连接部件的方法。

公开(公告)号：US20070292090A1

公开(公告)日：2007-12-20

申请号：US11684680

申请日：2007-03-12

申请人： Gerard Alphonse ,  Mahesh Ajgaonkar ,  Robert Comizzoli ,  Rajeev Rohatgi ,  Michael Nguyen

发明人： Gerard Alphonse ,  Mahesh Ajgaonkar ,  Robert Comizzoli ,  Rajeev Rohatgi ,  Michael Nguyen

IPC分类号： G02B6/06

CPC分类号： G02B6/262 ,  A61B5/0066 ,  A61B5/02007 ,  A61B5/6852

摘要： A system and method which integrates a mirror at the fiber tip to the fiber tip and uses a tilted flat at the exit plane to prevent astigmatism caused by the cylindrical curvature of the fiber wall and minimize reflection.

摘要翻译： 将光纤尖端的反射镜与光纤尖端集成在一起的系统和方法，并在出射平面处使用倾斜的平面以防止由于纤维壁的圆柱形曲率引起的散光并使反射最小化。

公开(公告)号：US20070285669A1

公开(公告)日：2007-12-13

申请号：US11753945

申请日：2007-05-25

申请人： Mahesh Ajgaonkar ,  Cristian Toma

发明人： Mahesh Ajgaonkar ,  Cristian Toma

IPC分类号： G01B9/02

CPC分类号： A61B5/0059 ,  A61B5/0066 ,  G01N21/23

摘要： An apparatus for determining a polarization-insensitive interferometric signal and a birefringence for a sample and methods for using such an apparatus to characterize the sample are proved herein. Such apparatuses may generally be designed to eliminate birefringence associated with the apparatus itself, collect data from the sample using light in both orthogonal states, and determine the interference birefringence associated with the collected data.

摘要翻译： 本文证明了用于确定样品的偏振不敏感干涉信号和双折射的装置以及使用这种装置来表征样品的方法。 这样的装置通常可被设计为消除与装置本身相关联的双折射，使用两个正交状态的光收集来自样本的数据，并且确定与收集的数据相关联的干涉双折射。

公开(公告)号：US20060153577A1

公开(公告)日：2006-07-13

申请号：US11330526

申请日：2006-01-12

申请人： Mahesh Ajgaonkar

发明人： Mahesh Ajgaonkar

IPC分类号： H04B10/04

CPC分类号： H04B10/69 ,  H04B10/677

摘要： The receiver features a first splitter which divides a differential phase modulated signal into three signal components from which at least two signal components are routed via timers. The first timer has a delay of a half period of the carrier signal and thereby serves in a conventional way for phase comparison and thus for demodulation. The second timer is adjustable and is used to compensate for the dispersion.

公开(公告)号：US08414186B2

公开(公告)日：2013-04-09

申请号：US12451866

申请日：2008-07-18

申请人： Chung Lee ,  Kwang Suh ,  Mahesh Ajgaonkar ,  Kent Kalar

发明人： Chung Lee ,  Kwang Suh ,  Mahesh Ajgaonkar ,  Kent Kalar

IPC分类号： G01K1/00 ,  G01K3/06 ,  G01J5/08 ,  G02B6/036

CPC分类号： G01K11/32 ,  G02B6/02004

摘要： A new step-index multimode pure silica core fiber for DTS (Distributed Temperature Sensing) system particularly useful for downhole environments is disclosed and described. The new sensor system provides optimum tradeoffs between coupling power, spatial resolution, and temperature resolution.

摘要翻译： 公开和描述了一种用于DTS（分布式温度感测）系统的新的步进折射率多模纯硅芯光纤，特别适用于井下环境。 新的传感器系统提供耦合功率，空间分辨率和温度分辨率之间的最佳折衷。

公开(公告)号：US07680378B2

公开(公告)日：2010-03-16

申请号：US11684680

申请日：2007-03-12

申请人： Gerard A. Alphonse ,  Mahesh Ajgaonkar ,  Robert Comizzoli ,  Rajeev Rohatgi ,  Michael Nguyen

发明人： Gerard A. Alphonse ,  Mahesh Ajgaonkar ,  Robert Comizzoli ,  Rajeev Rohatgi ,  Michael Nguyen

IPC分类号： G02B6/06 ,  G02B6/02

CPC分类号： G02B6/262 ,  A61B5/0066 ,  A61B5/02007 ,  A61B5/6852

摘要： A system and method which integrates a mirror at the fiber tip to the fiber tip and uses a tilted flat at the exit plane to prevent astigmatism caused by the cylindrical curvature of the fiber wall and minimize reflection.

摘要翻译： 将光纤尖端的反射镜与光纤尖端集成在一起的系统和方法，并在出射平面处使用倾斜的平面以防止由于纤维壁的圆柱形曲率引起的散光并使反射最小化。

公开(公告)号：US07488930B2

公开(公告)日：2009-02-10

申请号：US11445514

申请日：2006-06-02

申请人： Mahesh Ajgaonkar ,  Gerard A. Alphonse

发明人： Mahesh Ajgaonkar ,  Gerard A. Alphonse

IPC分类号： G02B6/00

CPC分类号： G01B9/0205 ,  G01B9/02028 ,  G01B9/0209 ,  G01B2290/70

摘要： A multi-channel low coherence interferometer having sensing and reference arms, at least one of which has variable delay. The sensing arm includes an optical switch for connecting to two or more probe arms. The distal ends of the probe arms collect source light backscattered from a sample. The backscattered light collected by the distal end of a probe arm is combined with reference light and a low coherence interferometric signal is produced by a sweep of a variable delay of the device or a sweep of a variable frequency laser light source. The interference signal produced by the interaction of reference and sensing light at a detector measures backscattered light, which may be used to characterize the sample. The low coherence interferometric signals can provide information about the morphology, physical nature, composition, and properties of the sample. The device may be used to discriminate between finished surfaces and corroded surfaces, healthy and diseased tissue, and can sample the material or tissue in two or more areas. Versions of the invention include devices that are interferometers and or autocorrelators.

摘要翻译： 具有感测和参考臂的多通道低相干干涉仪，其中至少一个具有可变的延迟。 感测臂包括用于连接到两个或更多个探针臂的光学开关。 探头臂的远端收集从样品反向散射的光源。 由探针臂的远端收集的背散射光与参考光结合，并且通过扫描可变延迟器件或扫描可变频率激光光源来产生低相干干涉信号。 在检测器处的​​参考和感测光的相互作用产生的干涉信号测量可以用于表征样品的反向散射光。 低相干干涉信号可以提供关于样品的形态，物理性质，组成和性质的信息。 该装置可以用于区分完成的表面和腐蚀的表面，健康和患病组织，并且可以在两个或更多个区域中对材料或组织进行采样。 本发明的版本包括作为干涉仪和/或自相关器的装置。

公开(公告)号：US08333505B2

公开(公告)日：2012-12-18

申请号：US12735356

申请日：2009-01-17

申请人： Chung Lee ,  Kent Kalar ,  Mahesh Ajgaonkar ,  Michael Sanders

发明人： Chung Lee ,  Kent Kalar ,  Mahesh Ajgaonkar ,  Michael Sanders

IPC分类号： G01K3/00

CPC分类号： G01K11/32

摘要： Systems and methods for extending the range of a fiber optic DTS system are provided. In one respect, a method may provide steps for transmitting, in a first time period, an optical signal at a first energy level through an optical fiber, collecting backscatter signals as a result of the first transmission, adjusting the first energy level to a second energy level, transmitting, in an additional time period, the adjusted optical signal through the optical fiber, collecting backscatter signals as a result of the adjusted transmissions, and using a portion of the collected backscatter as a result of the first transmission and a portion of the collected backscatter as a result of the additional transmissions, determining one or more parameter profiles, such as a temperature profile.

摘要翻译： 提供了用于扩展光纤DTS系统范围的系统和方法。 在一个方面，一种方法可以提供在第一时间段内通过光纤在第一能级发射光信号的步骤，作为第一传输的结果收集反向散射信号，将第一能级调整到第二能级 能量水平，在额外的时间段内通过光纤传输经调整的光信号，作为经调整的传输的结果收集后向散射信号，并且作为第一次传输的结果使用收集的反向散射的一部分， 作为附加传输的结果的收集的反向散射，确定一个或多个参数分布，诸如温度分布。