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    Optically pumped stepped multi-well laser
    61.
    发明授权
    Optically pumped stepped multi-well laser 有权
    光泵浦阶梯式多孔激光器

    公开(公告)号：US07266279B1

    公开(公告)日：2007-09-04

    申请号：US11090436

    申请日：2005-03-25

    Applicant: Daniel Yap ,  David Chow ,  Authi Narayanan

    Inventor： Daniel Yap ,  David Chow ,  Authi Narayanan

    IPC: G02B8/10 ,  G02B8/12 ,  H01S5/00

    CPC classification number: H01S5/3402 ,  B82Y20/00 ,  H01S5/041

    Abstract: An apparatus and methods for an optically pumped laser that has a cascade of light-emitting interband transitions are disclosed. The apparatus disclosed contains multistep interband cascade regions able to generate a plurality of photons for a pump photon absorbed from an optical pump source. The methods disclosed teach how to produce a plurality of photons for a pump photon absorbed from an optical pump source.

    Abstract translation: 公开了一种具有级联发光的带间跃迁的光泵浦激光器的装置和方法。 所公开的装置包含能够为从光泵浦源吸收的泵浦光子产生多个光子的多步带间级联区域。 所公开的方法教导了如何产生用于从光泵浦源吸收的泵浦光子的多个光子。

    Tunable RF-lightwave modulator
    63.
    发明授权
    Tunable RF-lightwave modulator 失效
    可调谐RF-光波调制器

    公开(公告)号：US07181093B2

    公开(公告)日：2007-02-20

    申请号：US10735070

    申请日：2003-12-12

    Applicant: Daniel Yap ,  Peter Petre ,  Joseph S. Colburn

    Inventor： Daniel Yap ,  Peter Petre ,  Joseph S. Colburn

    IPC: G02F1/01 ,  G02F1/035 ,  G02B6/12

    CPC classification number: G02F1/011 ,  G02F2203/15

    Abstract: The present invention provides a RF-lightwave modulator with improved efficiency by making use of a broken loop resonator having a gap therein. In the present invention a RF input signal is coupled into a broken loop resonator, thereby producing a RF output signal. An optical modulator connected across the gap receives the RF output signal and modulates a lightwave with the RF output signal to produce a RF modulated lightwave. Because the optical modulator is connected across the gap in the broken loop resonator, the voltage of the RF output signal applied to the optical modulator will be greater than the voltage of the RF input signal applied to the broken loop resonator.

    Abstract translation: 本发明通过利用其中具有间隙的断环谐振器来提供具有提高的效率的RF光波调制器。 在本发明中，RF输入信号被耦合到断环谐振器中，从而产生RF输出信号。 连接在间隙上的光调制器接收RF输出信号并用RF输出信号调制光波以产生RF调制光波。 由于光学调制器跨过断环谐振器的间隙连接，所以施加到光调制器的RF输出信号的电压将大于施加到断环谐振器的RF输入信号的电压。

    RF lightwave coding system for radar pulse compression
    65.
    发明授权
    RF lightwave coding system for radar pulse compression 有权
    射频光波编码系统，用于雷达脉冲压缩

    公开(公告)号：US07053814B2

    公开(公告)日：2006-05-30

    申请号：US10760021

    申请日：2004-01-15

    Applicant: Daniel Yap

    Inventor： Daniel Yap

    IPC: G01S13/86

    CPC classification number: G01S13/288 ,  G01S7/28

    Abstract: An apparatus for preparing a RF radar transmit waveform and for decoding RF return waveforms comprising: a RF-lightwave encoder and a decoding preprocessor to phase-encode the RF radar transmit waveform and partially decode the return signal, the encoder including switched optical delay lines for producing desired RF phase shifts, and the decoding preprocessor including a tapped optical delay line and optical delay lines that counteract the delays imposed by the delay lines of the encoder, wherein the RF-lightwave encoder and the decoders allow shorter compressed pulses and larger pulse-compression ratios to be achieved than can be obtained using conventional electronic approaches. Wideband transmit waveforms can be generated due to the use of the switched optical delay lines and, unlike prior art approaches, is not restricted to single-frequency waveforms. The taps can be weighted to accomplish objectives such as reduction of side lobes in the compressed pulse.

    Abstract translation: 一种用于准备RF雷达发射波形并用于解码RF返回波形的装置，包括：RF光波编码器和解码预处理器，用于对RF雷达发射波形进行相位编码并部分解码返回信号，编码器包括用于 产生期望的RF相移，并且解码预处理器包括抽头光延迟线和抵消由编码器的延迟线施加的延迟的光延迟线，其中RF-光波编码器和解码器允许较短的压缩脉冲和较大的脉冲 - 压缩比要比使用常规电子方法获得的要高。 由于使用了切换的光学延迟线，可以产生宽带发射波形，并且与现有技术方法不同，不限于单频波形。 可以对水龙头进行加权以实现目标，例如减少压缩脉冲中的旁瓣。

    Infrared detector
    69.
    发明授权
    Infrared detector 有权
    红外探测器

    公开(公告)号：US08969986B1

    公开(公告)日：2015-03-03

    申请号：US13036403

    申请日：2011-02-28

    Applicant: Daniel Yap ,  Rajesh D. Rajavel ,  Sarabjit Mehta ,  Hasan Sharifi

    Inventor： Daniel Yap ,  Rajesh D. Rajavel ,  Sarabjit Mehta ,  Hasan Sharifi

    IPC: H01L31/0232

    CPC classification number: H01L31/1844 ,  H01L27/14685 ,  H01L31/02363 ,  H01L31/035281 ,  H01L31/1892 ,  Y02E10/50

    Abstract: An infrared photo-detector with multiple discrete regions of a first absorber material. These regions may have geometric shapes with sloped sidewalls. The detector also may include a second absorber region comprising a second absorber material that absorbs light of a shorter wavelength than the light absorbed by the multiple discrete absorber regions of the first absorber material. The geometric shapes may extend only through the first absorber material. Alternatively, the geometric shapes may extend partially into the second absorber region. The detector has a metal reflector coupled to the multiple discrete absorber regions. The detector also has a substrate containing the discrete absorber regions and the second absorber region. The substrate can further include geometric shaped features etched into the substrate, with those features formed on the side of the substrate opposite the side containing the discrete absorber regions and the second absorber region.

    Abstract translation: 具有第一吸收材料的多个离散区域的红外光电检测器。 这些区域可以具有倾斜侧壁的几何形状。 检测器还可以包括第二吸收体区域，该第二吸收体区域吸收比由第一吸收体材料的多个分立吸收体区域吸收的光更短波长的光的第二吸收体材料。 几何形状可仅延伸穿过第一吸收材料。 或者，几何形状可以部分地延伸到第二吸收体区域中。 检测器具有耦合到多个分立吸收体区域的金属反射器。 检测器还具有包含离散吸收区域和第二吸收区域的基板。 衬底还可以包括蚀刻到衬底中的几何形状特征，其中这些特征形成在衬底的与包含离散吸收体区域和第二吸收体区域的侧面相反的一侧。

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