公开(公告)号：US07400792B2

公开(公告)日：2008-07-15

申请号：US11008735

申请日：2004-12-09

申请人： Jerry C. Chen

发明人： Jerry C. Chen

IPC分类号： G02B6/26 ,  G02B26/08

CPC分类号： G02B6/352 ,  G02B6/3546 ,  G02B6/356

摘要： A method for cross connecting optical signals includes using a common beam steerer to direct a set of optical signals from a set of input ports to a set of output ports. The method further includes adjusting a curvature of the common beam steerer so that paths of the optical signals have substantially the same effective path length.

摘要翻译： 用于交叉连接光信号的方法包括使用公共波束控制器将一组光信号从一组输入端口引导到一组输出端口。 该方法还包括调整公共光束转向器的曲率，使得光信号的路径具有基本上相同的有效路径长度。

公开(公告)号：US08270785B2

公开(公告)日：2012-09-18

申请号：US12579108

申请日：2009-10-14

申请人： Jerry C. Chen

发明人： Jerry C. Chen

IPC分类号： G02B6/42 ,  G02B6/32

CPC分类号： G02B6/352 ,  G02B6/3546 ,  G02B6/356

摘要： A method for cross connecting optical signals includes using a common beam steerer to direct a set of optical signals from a set of input ports to a set of output ports. The method further includes adjusting a curvature of the common beam steerer so that paths of the optical signals have substantially the same effective path length.

摘要翻译： 用于交叉连接光信号的方法包括使用公共波束控制器将一组光信号从一组输入端口引导到一组输出端口。 该方法还包括调整公共光束转向器的曲率，使得光信号的路径具有基本上相同的有效路径长度。

公开(公告)号：US06996345B1

公开(公告)日：2006-02-07

申请号：US10145616

申请日：2002-05-10

申请人： Jerry C. Chen

发明人： Jerry C. Chen

IPC分类号： H04B10/04

CPC分类号： G02F1/0121 ,  G02F1/03 ,  G02F2203/19

摘要： Changing the phrases when mixing of optical modes gives rise to intensity effects. This occurs in multi-mode interferometer (MMI) or arrayed waveguide gratings (AWG). Here we use an electro-arefractive modulator, with a quadratic electro-optic effect that has an optical transfer function (Or power vs voltage (L-V) curve) given by is Pout=Pin (1+γ cos θ)/2 where asymmetry factor γ measures the extinction ratio and the phase difference θ between arms is π ⁢ ⁢ V 2 V π 2 ⁢ π ⁢ V 2 V π 2 . In turn, the voltage V is expressed as a sum of the DC bias and RF drive V=VDC+VRF.

摘要翻译： 在混合光学模式时改变短语会产生强度效应。 这发生在多模干涉仪（MMI）或阵列波导光栅（AWG）中。 在这里，我们使用具有光学传递函数（或功率对电压（LV）曲线）的二次电光效应的电差分调制器，由P = （1 +γcosθ）/ 2其中不对称因子γ测量臂之间的消光比和相位差θ

公开(公告)号：US08514393B2

公开(公告)日：2013-08-20

申请号：US13016143

申请日：2011-01-28

申请人： Mohammad Jalal Khan ,  Jerry C. Chen ,  Sumanth Kaushik

发明人： Mohammad Jalal Khan ,  Jerry C. Chen ,  Sumanth Kaushik

IPC分类号： G01J3/28

CPC分类号： G01J3/42 ,  G01N21/3581 ,  G01N2021/1793

摘要： Disclosed herein are a system and corresponding method for sensing terahertz radiation. The system collects terahertz radiation scattered from a target and upconverts the collected radiation to optical frequencies. A frequency-domain spectrometer senses spectral components of the upconverted signal in parallel to produce a spectroscopic measurement of the entire band of interest in a single shot. Because the sensing system can do single-shot measurements, it can sense moving targets, unlike sensing systems that use serial detection, which can only be used to sense stationary objects. As a result, the sensing systems and methods disclosed herein may be used for real-time imaging, including detection of concealed weapons, medical imaging, and hyperspectral imaging.

公开(公告)号：US20120008140A1

公开(公告)日：2012-01-12

申请号：US13016143

申请日：2011-01-28

申请人： Mohammad Jalal Khan ,  Jerry C. Chen ,  Sumanth Kaushik

发明人： Mohammad Jalal Khan ,  Jerry C. Chen ,  Sumanth Kaushik

IPC分类号： G01J3/00

CPC分类号： G01J3/42 ,  G01N21/3581 ,  G01N2021/1793

摘要： Disclosed herein are a system and corresponding method for sensing terahertz radiation. The system collects terahertz radiation scattered from a target and upconverts the collected radiation to optical frequencies. A frequency-domain spectrometer senses spectral components of the upconverted signal in parallel to produce a spectroscopic measurement of the entire band of interest in a single shot. Because the sensing system can do single-shot measurements, it can sense moving targets, unlike sensing systems that use serial detection, which can only be used to sense stationary objects. As a result, the sensing systems and methods disclosed herein may be used for real-time imaging, including detection of concealed weapons, medical imaging, and hyperspectral imaging.

摘要翻译： 这里公开了用于感测太赫兹辐射的系统和相应的方法。 该系统收集从目标散射的太赫兹辐射，并将收集的辐射上变频到光频率。 频域光谱仪平行地感测上转换信号的光谱分量，以在单次拍摄中产生整个感兴趣的频带的光谱测量。 因为感测系统可以进行单次测量，所以它可以感测移动目标，不同于使用串行检测的传感系统，只能用于感测静止物体。 结果，本文公开的感测系统和方法可用于实时成像，包括隐藏武器的检测，医学成像和高光谱成像。

公开(公告)号：US07623744B2

公开(公告)日：2009-11-24

申请号：US12137023

申请日：2008-06-11

申请人： Jerry C. Chen

发明人： Jerry C. Chen

IPC分类号： G02B6/26 ,  G02B6/32

CPC分类号： G02B6/352 ,  G02B6/3546 ,  G02B6/356

摘要： A method for cross connecting optical signals includes using a common beam steerer to direct a set of optical signals from a set of input ports to a set of output ports. The method further includes adjusting a curvature of the common beam steerer so that paths of the optical signals have substantially the same effective path length.

摘要翻译： 用于交叉连接光信号的方法包括使用公共波束控制器将一组光信号从一组输入端口引导到一组输出端口。 该方法还包括调整公共光束转向器的曲率，使得光信号的路径具有基本上相同的有效路径长度。

公开(公告)号：US20080074674A1

公开(公告)日：2008-03-27

申请号：US11626966

申请日：2007-01-25

申请人： Jerry C. Chen ,  Sumanth Kaushik

发明人： Jerry C. Chen ,  Sumanth Kaushik

IPC分类号： G01B11/02

CPC分类号： G01B15/00 ,  G01H9/00

摘要： Described are a sensor and a method for measuring a vibration of a surface obscured from view. The sensor includes a narrowband source of a terahertz beam, a beamsplitter, a beam combiner and a terahertz detector. The beamsplitter splits the terahertz beam into a sample beam for irradiating the surface and a reference beam. The beam combiner combines the sample beam scattered from the surface and the reference beam. The terahertz detector generates an electrical signal based on a modulation of the power of the combined beams due to the vibrating surface. The electrical signal indicates a characteristic of the surface vibration. Homodyne or heterodyne detection can be utilized. Advantageously, the sensor can see surfaces that are covered, concealed or otherwise obscured behind optically opaque materials, including plastic, cloth, foam, paper and other materials. Thus the sensor has a wide variety of applications where conventional vibrometers are not practical.

摘要翻译： 描述了一种用于测量从视野遮蔽的表面的振动的传感器和方法。 传感器包括太赫兹波束的窄带源，分束器，波束组合器和太赫兹检测器。 分束器将太赫兹光束分成用于照射表面的样品光束和参考光束。 光束组合器将从表面散射的样品光束和参考光束组合。 太赫兹检测器基于由于振动表面的组合光束的功率的调制而产生电信号。 电信号表示表面振动的特征。 可以利用零差或外差检测。 有利地，传感器可以看到在光学不透明材料（包括塑料，布，泡沫，纸和其它材料）之后被覆盖，隐藏或以其他方式遮盖的表面。 因此，传感器具有广泛的应用，其中常规的振动计不实用。

公开(公告)号：US20140061473A1

公开(公告)日：2014-03-06

申请号：US13945542

申请日：2013-07-18

申请人： Mohammad J. Khan ,  Sumanth Kaushik ,  Jerry C. Chen

发明人： Mohammad J. Khan ,  Sumanth Kaushik ,  Jerry C. Chen

IPC分类号： G01J3/42

CPC分类号： G01J3/42 ,  G01N21/3581 ,  G01N2021/1793

摘要： Disclosed herein are a system and corresponding method for sensing terahertz radiation. The system collects terahertz radiation scattered from a target and upconverts the collected radiation to optical frequencies. A frequency-domain spectrometer senses spectral components of the upconverted signal in parallel to produce a spectroscopic measurement of the entire band of interest in a single shot. Because the sensing system can do single-shot measurements, it can sense moving targets, unlike sensing systems that use serial detection, which can only be used to sense stationary objects. As a result, the sensing systems and methods disclosed herein may be used for real-time imaging, including detection of concealed weapons, medical imaging, and hyperspectral imaging.

摘要翻译： 这里公开了用于感测太赫兹辐射的系统和相应的方法。 该系统收集从目标散射的太赫兹辐射，并将收集的辐射上变频到光频率。 频域光谱仪平行地感测上转换信号的光谱分量，以在单次拍摄中产生整个感兴趣的频带的光谱测量。 因为感测系统可以进行单次测量，所以它可以感测移动目标，不同于使用串行检测的传感系统，只能用于感测静止物体。 结果，本文公开的感测系统和方法可用于实时成像，包括隐藏武器的检测，医学成像和高光谱成像。

公开(公告)号：US20100034499A1

公开(公告)日：2010-02-11

申请号：US12579108

申请日：2009-10-14

申请人： Jerry C. Chen

发明人： Jerry C. Chen

IPC分类号： G02B6/26

CPC分类号： G02B6/352 ,  G02B6/3546 ,  G02B6/356

摘要： A method for cross connecting optical signals includes using a common beam steerer to direct a set of optical signals from a set of input ports to a set of output ports. The method further includes adjusting a curvature of the common beam steerer so that paths of the optical signals have substantially the same effective path length.

摘要翻译： 用于交叉连接光信号的方法包括使用公共波束控制器将一组光信号从一组输入端口引导到一组输出端口。 该方法还包括调整公共光束转向器的曲率，使得光信号的路径具有基本上相同的有效路径长度。

公开(公告)号：US07564567B2

公开(公告)日：2009-07-21

申请号：US11626966

申请日：2007-01-25

申请人： Jerry C. Chen ,  Sumanth Kaushik

发明人： Jerry C. Chen ,  Sumanth Kaushik

IPC分类号： G01B11/02

CPC分类号： G01B15/00 ,  G01H9/00

摘要： Described are a sensor and a method for measuring a vibration of a surface obscured from view. The sensor includes a narrowband source of a terahertz beam, a beamsplitter, a beam combiner and a terahertz detector. The beamsplitter splits the terahertz beam into a sample beam for irradiating the surface and a reference beam. The beam combiner combines the sample beam scattered from the surface and the reference beam. The terahertz detector generates an electrical signal based on a modulation of the power of the combined beams due to the vibrating surface. The electrical signal indicates a characteristic of the surface vibration. Homodyne or heterodyne detection can be utilized. Advantageously, the sensor can see surfaces that are covered, concealed or otherwise obscured behind optically opaque materials, including plastic, cloth, foam, paper and other materials. Thus the sensor has a wide variety of applications where conventional vibrometers are not practical.

摘要翻译： 描述了一种用于测量从视野遮蔽的表面的振动的传感器和方法。 传感器包括太赫兹波束的窄带源，分束器，波束组合器和太赫兹检测器。 分束器将太赫兹光束分成用于照射表面的样品光束和参考光束。 光束组合器将从表面散射的样品光束和参考光束组合。 太赫兹检测器基于由于振动表面的组合光束的功率的调制而产生电信号。 电信号表示表面振动的特征。 可以利用零差或外差检测。 有利地，传感器可以看到在光学不透明材料（包括塑料，布，泡沫，纸和其它材料）之后被覆盖，隐藏或以其他方式遮盖的表面。 因此，传感器具有广泛的应用，其中常规的振动计不实用。