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80 条记录 (耗时 0.038 秒)

    Multiple quantum-well infrared detector
    61.
    发明授权
    Multiple quantum-well infrared detector 失效
    多量子阱红外探测器

    公开(公告)号：US4620214A

    公开(公告)日：1986-10-28

    申请号：US557594

    申请日：1983-12-02

    申请人： Shlomo Margalit ,  Liew-Chuang Chiu ,  John S. Smith ,  Amnon Yariv

    发明人： Shlomo Margalit ,  Liew-Chuang Chiu ,  John S. Smith ,  Amnon Yariv

    IPC分类号： H01L31/0352 ,  H01L31/101 ,  H01L29/167 ,  H01L27/14

    CPC分类号： B82Y20/00 ,  H01L31/035236 ,  H01L31/101

    摘要： Alternating layers of N+ GaAs (80 .ANG.) and N+ Ga.sub.1-x Al.sub.x As (300 .ANG.), all heavily doped with a uniform flux of Sn, and biased by 2V, provide a multiple quantum-well heterojunction structure for infrared detection with cutoff wavelength established by the choice of the value x which defines the depth of the wells. Fine tuning of the cutoff wavelength may be achieved by varying the bias voltage. By biasing the individual quantum-well layers progressively through a voltage divider, an avalanche mechanism may be achieved in the detector for signal amplification. The detectors may be fabricated in large two-dimensional arrays.

    摘要翻译： N + GaAs（80 ANGSTROM）和N + Ga1-xAlxAs（300 ANGSTROM）的交替层，全部重掺杂有均匀的Sn通量，并被2V偏置，提供了多个量子阱异质结结构，用于红外检测，其截止波长由 选择定义井的深度的值x。 可以通过改变偏置电压来实现截止波长的微调。 通过将各个量子阱层逐渐偏压通过分压器，可以在用于信号放大的检测器中实现雪崩机制。 检测器可以以大的二维阵列制造。

    X-ray laser with a single crystal waveguide structure
    63.
    发明授权
    X-ray laser with a single crystal waveguide structure 失效
    具有单晶波导结构的X射线激光器

    公开(公告)号：US3967213A

    公开(公告)日：1976-06-29

    申请号：US555695

    申请日：1975-03-05

    申请人： Amnon Yariv

    发明人： Amnon Yariv

    IPC分类号： H01S4/00 ,  H01S3/16

    CPC分类号： H01S4/00

    摘要： An X-ray laser comprises a single crystal in the form of a thin film with an oriented set of prominent atomic planes so that when the crystal is pumped, X-ray photons which are emitted from one of the atomic constituents of the crystal, experience internal feedback (Bragg scattering) from the atomic planes thereby eliminating the need for external feedback. In addition the crystal functions as a thin planar waveguide confining the X-ray waves therein, thereby reducing the necessary pumping power and increasing overall efficiency.

    摘要翻译： X射线激光器包括具有定向成组的突出原子平面的薄膜形式的单晶，使得当晶体被泵浦时，从晶体的原子成分之一发射的X射线光子经历 内部反馈（布拉格散射），从而消除了对外部反馈的需要。 此外，晶体用作限制其中的X射线波的薄平面波导，从而减少必要的泵浦功率并提高整体效率。

    Three-dimensional tomographic imaging camera based on compressive sensing
    64.
    发明授权
    Three-dimensional tomographic imaging camera based on compressive sensing 有权
    基于压缩感知的三维断层成像摄像机

    公开(公告)号：US09465110B2

    公开(公告)日：2016-10-11

    申请号：US14050296

    申请日：2013-10-09

    申请人： Naresh Satyan ,  Arseny Vasilyev ,  Amnon Yariv ,  George Rakuljic

    发明人： Naresh Satyan ,  Arseny Vasilyev ,  Amnon Yariv ,  George Rakuljic

    IPC分类号： G01S17/08 ,  G01S17/32 ,  G01S7/491 ,  G01S17/89

    CPC分类号： G01S17/08 ,  G01S7/4911 ,  G01S7/4913 ,  G01S17/325 ,  G01S17/89

    摘要： A detection apparatus and method for FMCW LIDAR employ signals that are modified so that low-cost and low-speed photodetector arrays, such as CCD or CMOS cameras, can be employed for range detection. The LIDAR is designed to measure the range to one or more targets and includes a single mode swept frequency laser (SFL), whose optical frequency is varied with time, as a result of which, a target beam which is reflected back by the one or more targets is shifted in frequency from a reference beam by an amount that is proportional to the relative range to the one or more targets. The reflected target beam(s) is/are combined with the reference beam and detected by the photodetector array. In the case of a sparse number of targets to be detected, Compressive Sensing (CS) techniques can be employed by a processor to reduce the number of measurements necessary to determine the range of each target.

    摘要翻译： 用于FMCW LIDAR的检测装置和方法采用被修改的信号，使得可以使用诸如CCD或CMOS照相机的低成本和低速光电检测器阵列进行范围检测。 激光雷达设计用于测量到一个或多个目标的范围，并且包括单频扫频激光器（SFL），其光频随时间变化，结果是由一个或多个目标光束反射的目标光束 更多的目标在频率上从参考光束移位的量与一个或多个目标的相对范围成比例。 反射的目标光束与参考光束组合并由光电检测器阵列检测。 在要检测的目标数量稀少的情况下，处理器可以使用压缩感测（CS）技术来减少确定每个目标的范围所需的测量次数。

    THREE-DIMENSIONAL TOMOGRAPHIC IMAGING CAMERA
    65.
    发明申请
    THREE-DIMENSIONAL TOMOGRAPHIC IMAGING CAMERA 有权
    三维图像成像摄像机

    公开(公告)号：US20150177380A1

    公开(公告)日：2015-06-25

    申请号：US14586584

    申请日：2014-12-30

    申请人： Naresh Satyan ,  Arseny Vasilyev ,  George Rakuljic ,  Amnon Yariv

    发明人： Naresh Satyan ,  Arseny Vasilyev ,  George Rakuljic ,  Amnon Yariv

    IPC分类号： G01S17/32

    CPC分类号： G01S17/325 ,  G01C15/002 ,  G01S17/89

    摘要： A detection apparatus and method for FMCW LIDAR employ signals whose frequencies are modified so that low-cost and low-speed photodetector arrays, such as CCD or CMOS cameras, can be employed for range detection. The LIDAR is designed to measure the range z to a target and includes a single mode swept frequency laser (SFL), whose optical frequency is varied with time, as a result of which, a target beam which is reflected back by the target is shifted in frequency from a reference beam by an amount that is proportional to the relative range z to the target. The reflected target beam is combined with the reference beam and detected by the photodetector array. By first modulating at least one of the target and reference beams such that the difference between the frequencies of the reflected target beam and the reference beam is reduced to a level that is within the bandwidth of the photodetector array, the need for high-speed detector arrays for full-field imaging is obviated.

    摘要翻译： 用于FMCW LIDAR的检测装置和方法使用其频率被修改的信号，使得可以使用诸如CCD或CMOS照相机的低成本和低速光电检测器阵列进行范围检测。 激光雷达设计用于测量目标的范围z，并且包括单频扫频激光器（SFL），其光频随时间变化，其结果是被目标反射回的目标光束被移位 来自参考光束的频率与与目标的相对范围z成比例的量。 反射的目标光束与参考光束组合并由光电检测器阵列检测。 通过首先调制目标和参考光束中的至少一个，使得反射的目标光束和参考光束的频率之间的差减小到在光电检测器阵列的带宽内的水平，则需要高速检测器 排除了全场成像的阵列。

    Optical resonator
    68.
    发明授权
    Optical resonator 失效
    光谐振器

    公开(公告)号：US07151876B2

    公开(公告)日：2006-12-19

    申请号：US11225832

    申请日：2005-09-13

    申请人： Shervin Taghavi-Larigani ,  Jakob J. Vanzyl ,  Amnon Yariv

    发明人： Shervin Taghavi-Larigani ,  Jakob J. Vanzyl ,  Amnon Yariv

    IPC分类号： G02B6/26

    CPC分类号： H01S5/10 ,  G02B6/12007 ,  H01S5/026 ,  H01S5/1021 ,  H01S5/1028 ,  H01S5/1032 ,  H01S5/141

    摘要： The invention discloses a semi-ring Fabry-Perot (SRFP) optical resonator structure comprising a medium including an edge forming a reflective facet and a waveguide within the medium, the waveguide having opposing ends formed by the reflective facet. The performance of the SRFP resonator can be further enhanced by including a Mach-Zehnder interferometer in the waveguide on one side of the gain medium. The optical resonator can be employed in a variety of optical devices. Laser structures using at least one SRFP resonator are disclosed where the resonators are disposed on opposite sides of a gain medium. Other laser structures employing one or more resonators on one side of a gain region are also disclosed.

    摘要翻译： 本发明公开了一种半环法布里 - 珀罗（SRFP）光学谐振器结构，其包括介质，该介质包括形成反射小面的边缘和介质内的波导，该波导具有由反射小面形成的相对端。 通过在增益介质的一侧的波导中包括马赫 - 曾德尔干涉仪可以进一步提高SRFP谐振器的性能。 光学谐振器可用于各种光学器件。 公开了使用至少一个SRFP谐振器的激光结构，其中谐振器设置在增益介质的相对侧。 还公开了在增益区域的一侧采用一个或多个谐振器的其它激光结构。

    Tunable semiconductor lasers
    69.
    发明授权
    Tunable semiconductor lasers 失效
    可调谐半导体激光器

    公开(公告)号：US07027476B2

    公开(公告)日：2006-04-11

    申请号：US10638763

    申请日：2003-08-11

    申请人： Shervin Taghavi-Larigani ,  Jakob J. Vanzyl ,  Amnon Yariv

    发明人： Shervin Taghavi-Larigani ,  Jakob J. Vanzyl ,  Amnon Yariv

    IPC分类号： H01S3/10

    CPC分类号： H01S5/1032 ,  H01S5/0287 ,  H01S5/101 ,  H01S5/141

    摘要： Tunable semiconductor lasers are disclosed requiring minimized coupling regions. Multiple laser embodiments employ ring resonators or ring resonator pairs using only a single coupling region with the gain medium are detailed. Tuning can be performed by changing the phase of the coupling coefficient between the gain medium and a ring resonator of the laser. Another embodiment provides a tunable laser including two Mach-Zehnder interferometers in series and a reflector coupled to a gain medium.

    摘要翻译： 公开了可调谐的半导体激光器，其需要最小化的耦合区域。 多个激光器实施例仅使用具有增益介质的单个耦合区域采用环形谐振器或环形谐振器对。 可以通过改变激光器的增益介质和环形谐振器之间的耦合系数的相位来执行调谐。 另一实施例提供了一种包括串联的两个马赫 - 曾德干涉仪和耦合到增益介质的反射器的可调谐激光器。

    Sampling and processing signals by using optical pulses
    70.
    发明授权
    Sampling and processing signals by using optical pulses 有权
    采用光脉冲采样和处理信号

    公开(公告)号：US06219172B1

    公开(公告)日：2001-04-17

    申请号：US09193551

    申请日：1998-11-17

    申请人： Amnon Yariv

    发明人： Amnon Yariv

    IPC分类号： G02F103

    CPC分类号： H04B10/508 ,  H04B10/505

    摘要： A device and technique to sample an analog signal by optical pulses at a high sampling rate. Parallel analog-to-digital conversion channels can be implemented to achieve high-speed analog-to-digital conversion.

    摘要翻译： 以高采样率的光脉冲采样模拟信号的装置和技术。 可以实现并行模数转换通道，实现高速模数转换。