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公开(公告)号：US5206524A
公开(公告)日：1993-04-27
申请号：US721913
申请日：1991-06-20
IPC分类号： H01L29/08 , H01L29/205 , H01L29/737
CPC分类号： H01L29/7371 , H01L29/0895 , H01L29/205
摘要： Improved heterojunction bipolar transistor (HBT) are disclosed. Inventive devices can attain high cut-off frequency (f.sub.T), exemplarily 80 GHz or higher, and high DC current gain (.beta.), exemplarily 25 or higher. The devices exhibit lateral scaling, permitting reduction in emitter stripe width without unacceptable decrease in .beta.. Exemplarily the stripe width is 1 .mu.m or less. The inventive HBTs are hot electron devices, with the hot electrons in the base region being spatially confined such that relatively few electrons reach the surface of the extrinsic base region. The relatively low bulk and surface recombination rate in the base of inventive HBTs is an important aspect of the invention and makes possible devices having relatively high .beta. and low power consumption. Appropriate choice of base material, namely, a semiconductor material having relatively low intrinsic surface recombination velocity, can result in further reduction of surface recombination, as can, for instance, the use of an appropriate non-alloyed metal base contact. Appropriate choice of collector material can result in improved ballistic transport through the collector depletion region, and novel selection criteria are disclosed. InP, InAs, and In.sub.0.53 Ga.sub.0.47 As are exemplary materials that meet these criteria. Use of a highly doped collector contact region, with dopant level within a relatively narrow concentration range, can also lead to improved device behavior, as can the use of a compound emitter that comprises one or more appropriately placed thin undoped heteroepitaxial layers.
摘要翻译： 公开了改进的异质结双极晶体管（HBT）。 本发明的器件可以获得例如80GHz或更高的高截止频率（fT）和高直流电流增益（β），示例性地为25或更高。 这些器件表现出横向缩放，允许发射极条宽度的减小，而β不会有不可接受的降低。 条纹宽度为1μm以下。 本发明的HBT是热电子器件，其中基极区中的热电子被空间限制，使得相对少的电子到达外部基极区域的表面。 本发明HBT的基底中相对较低的体积和表面复合速率是本发明的重要方面，并使得可能的器件具有相对较高的β和低功耗。 基本材料的适当选择，即具有相对低的固有表面复合速度的半导体材料可以导致表面复合的进一步减少，例如可以使用合适的非合金金属基底接触。 收集器材料的适当选择可以导致通过集电极耗尽区的改进的弹道输送，并且公开了新的选择标准。 InP，InAs和In0.53Ga0.47A是满足这些标准的示例性材料。 使用具有相对窄的浓度范围内的掺杂剂水平的高度掺杂的集电极接触区域也可以导致改进的器件特性，使用包括一个或多个适当放置的未掺杂异质外延层的复合发射极也是如此。
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62.发明授权Apparatus comprising a laser adapted for emission of single mode radiation having low transverse divergence 失效包括适于发射具有低横向发散度的单模辐射的激光器的装置
公开(公告)号：US5088099A
公开(公告)日：1992-02-11
申请号：US631292
申请日：1990-12-20
申请人： Young-Kai Chen , Minghwei Hong , Ming-Chiang Wu
发明人： Young-Kai Chen , Minghwei Hong , Ming-Chiang Wu
IPC分类号： H01S5/00 , H01S3/00 , H01S5/06 , H01S5/12 , H01S5/125 , H01S5/183 , H01S5/20 , H01S5/22 , H01S5/223 , H01S5/34
CPC分类号： H01S5/2027 , H01S2301/18 , H01S5/125 , H01S5/2213 , H01S5/2231
摘要： Disclosed is an edge-emitting semiconductor laser that has a single waveguiding structure, and that comprises means for reducing the transverse divergence of the far-field pattern of the laser emission. Typically these means comprise reflecting means (preferably transverse distributed Bragg reflectors) disposed parallel to the junction plane of the laser. Lasers according to the invention can have a highly stable single mode output having a substantially symmetrical far field pattern. Disclosed is also an advantageous method of making ridge-waveguide lasers that can, inter alia, be used to make lasers according to the invention. The method is a self-aligned method that does not comprise any critical alignment steps. Thus it is useful for making lasers that have a very narrow ridge waveguide. Such lasers are desirable because they can suppress lateral higher order modes.
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63.发明授权公开(公告)号：US09146349B2
公开(公告)日：2015-09-29
申请号：US13077086
申请日：2011-03-31
申请人： Long Chen , Christopher Doerr , Young-Kai Chen
发明人： Long Chen , Christopher Doerr , Young-Kai Chen
CPC分类号： G02B6/12004 , G02B6/122 , G02B6/42 , G02B6/43 , G02B2006/12061 , G02B2006/1208
摘要： Various exemplary embodiments relate to an integrated optical device including: a semiconductor waveguide on a substrate; a dielectric waveguide on a substrate optically coupled to the semiconductor waveguide; and a germanium device on the semiconductor waveguide optically coupled to the semiconductor waveguide.
摘要翻译： 各种示例性实施例涉及一种集成光学装置，包括：衬底上的半导体波导; 光电耦合到半导体波导的基板上的电介质波导; 以及光学耦合到半导体波导的半导体波导上的锗器件。
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64.发明申请公开(公告)号：US20120251034A1
公开(公告)日：2012-10-04
申请号：US13077086
申请日：2011-03-31
申请人： Long Chen , Christopher Doerr , Young-Kai Chen
发明人： Long Chen , Christopher Doerr , Young-Kai Chen
CPC分类号： G02B6/12004 , G02B6/122 , G02B6/42 , G02B6/43 , G02B2006/12061 , G02B2006/1208
摘要： Various exemplary embodiments relate to an integrated optical device including: a semiconductor waveguide on a substrate; a dielectric waveguide on a substrate optically coupled to the semiconductor waveguide; and a germanium device on the semiconductor waveguide optically coupled to the semiconductor waveguide.
摘要翻译： 各种示例性实施例涉及一种集成光学装置，包括：衬底上的半导体波导; 光电耦合到半导体波导的基板上的电介质波导; 以及光学耦合到半导体波导的半导体波导上的锗器件。
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公开(公告)号：US20120121268A1
公开(公告)日：2012-05-17
申请号：US13353579
申请日：2012-01-19
IPC分类号： H04B10/02
CPC分类号： H03F1/0294
摘要： A radiofrequency (rf) signal-processing device offers the possibility of high bandwidth operation. The disclosed device applies principles of microwave photonics and Linear Amplification based on Nonlinear Components (LINC). For some applications, the device may be embodied in an rf amplifier or rf transmitter. In an embodiment, an optical phase modulator is configured to receive an optical carrier signal as input, and further configured so that, when driven by an rf modulation signal, it will produce a complementary pair of optical signals as output. Each of a pair of detectors is configured to convert a respective one of the complementary optical signals to an rf signal. An rf combiner is configured to add the converted radiofrequency signals from the detectors to form an output signal.
摘要翻译： 射频（RF）信号处理设备提供高带宽操作的可能性。 所公开的设备应用基于非线性分量（LINC）的微波光子学和线性放大的原理。 对于一些应用，该装置可以体现在射频放大器或射频发射机中。 在一个实施例中，光相位调制器被配置为接收光载波信号作为输入，并进一步被配置为使得当由rf调制信号驱动时，它将产生互补的一对光信号作为输出。 一对检测器中的每一个被配置为将互补光信号中的相应一个转换成rf信号。 配置rf组合器以将来自检测器的经转换的射频信号相加以形成输出信号。
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公开(公告)号：US08055141B2
公开(公告)日：2011-11-08
申请号：US11957725
申请日：2007-12-17
CPC分类号： H04B10/00 , H04B2210/006
摘要： An apparatus and method for reducing electrical signal intermodulation by processing a balanced electrical signal in the optical domain in a manner adapted to reduce noise and second order intermodulation, and converting the processed optical signal back to an electrical domain signal with either a single or balanced (differential) outputs.
摘要翻译： 一种用于通过以适于减少噪声和二阶互调的方式处理光域中的平衡电信号并且将经处理的光信号转换回具有单个或平衡的电域信号的方式来减少电信号互调的装置和方法 差分）输出。
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公开(公告)号：US08014676B2
公开(公告)日：2011-09-06
申请号：US12035677
申请日：2008-02-22
申请人： Young-Kai Chen , Sanjay Patel , Mahmoud Rasras , Kun-Yii Tu
发明人： Young-Kai Chen , Sanjay Patel , Mahmoud Rasras , Kun-Yii Tu
CPC分类号： H04B10/00 , H04B2210/006
摘要： According to one embodiment, a microwave photonic band-stop (MPBS) filter uses an electrical input signal to drive an optical Mach-Zehnder modulator. A modulated optical carrier produced by the modulator is applied to an optical filter having at least two tunable spectral attenuation bands that are located substantially symmetrically on either side of the carrier frequency. The resulting filtered optical signal is applied to an optical-to-electrical (O/E) converter to produce an electrical output signal.
摘要翻译： 根据一个实施例，微波光子带阻（MPBS）滤波器使用电输入信号来驱动光学马赫 - 曾德尔调制器。 由调制器产生的调制光载波被应用于具有至少两个可调频谱衰减频带的滤光器，该衰减频带基本对称地位于载波频率的任一侧上。 所得到的经滤波的光信号被施加到光电（O / E）转换器以产生电输出信号。
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公开(公告)号：US20100247103A1
公开(公告)日：2010-09-30
申请号：US12384006
申请日：2009-03-31
IPC分类号： H04B10/00
CPC分类号： H03F1/0294
摘要： A radiofrequency (rf) signal-processing device offers the possibility of high bandwidth operation. The disclosed device applies principles of microwave photonics and Linear Amplification based on Nonlinear Components (LINC). For some applications, the device may be embodied in an rf amplifier or rf transmitter. In an embodiment, an optical phase modulator is configured to receive an optical carrier signal as input, and further configured so that, when driven by an rf modulation signal, it will produce a complementary pair of optical signals as output. Each of a pair of detectors is configured to convert a respective one of the complementary optical signals to an rf signal. An rf combiner is configured to add the converted radiofrequency signals from the detectors to form an output signal.
摘要翻译： 射频（RF）信号处理设备提供高带宽操作的可能性。 所公开的设备应用基于非线性分量（LINC）的微波光子学和线性放大的原理。 对于一些应用，该装置可以体现在射频放大器或射频发射机中。 在一个实施例中，光相位调制器被配置为接收作为输入的光载波信号，并进一步被配置为使得当由rf调制信号驱动时，它将产生互补的一对光信号作为输出。 一对检测器中的每一个被配置为将互补光信号中的相应一个转换成rf信号。 配置rf组合器以将来自检测器的经转换的射频信号相加以形成输出信号。
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公开(公告)号：US6016374A
公开(公告)日：2000-01-18
申请号：US963893
申请日：1997-11-04
IPC分类号： G02F1/01 , H04B3/04 , H04B10/02 , H04B10/16 , H04B10/17 , H04B10/18 , H04B10/20 , G02B6/28 , H03H7/30 , H04B10/00
CPC分类号： H04B10/2513 , H04B2210/254
摘要： In accordance with the present invention, an optical fiber communications system is provided with an adaptive data equalizer to correct for linear disortion of signals transmitted over optical fibers. A feedback signal from a receiver is used to custom tailor the spectral profile of a launched pulse to thereby minimize the distortion of a received pulse. The system uses optical taps for feedback control in order to adapt to changing conditions in the fiber path.
摘要翻译： 根据本发明，光纤通信系统设置有自适应数据均衡器，以校正通过光纤传输的信号的线性失真。 来自接收机的反馈信号用于定制定制发射脉冲的频谱分布，从而使接收的脉冲的失真最小化。 该系统使用光学抽头进行反馈控制，以适应光纤路径的变化条件。
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70.发明授权公开(公告)号：US09423560B2
公开(公告)日：2016-08-23
申请号：US13326583
申请日：2011-12-15
申请人： Long Chen , Pietro Bernasconi , Po Dong , Liming Zhang , Young-Kai Chen
发明人： Long Chen , Pietro Bernasconi , Po Dong , Liming Zhang , Young-Kai Chen
CPC分类号： G02B6/12004 , G02B6/12002 , G02B6/1228 , G02F1/015 , H01L27/15 , H01S5/026 , H01S5/0261
摘要： A device includes a passive photonic layer located over a substrate and including at least one passive photonic element configured to propagate an optical signal therein. An electronic layer located between said substrate and said passive photonic layer includes at least one electronic device configured to propagate an electrical signal therein. An active photonic layer located over said passive photonic layer includes an active photonic device optically coupled to said passive photonic element and configured to convert between said electrical signal and said optical signal.
摘要翻译： 一种器件包括位于衬底上方的无源光子层，并且包括配置成在其中传播光信号的至少一个无源光子元件。 位于所述衬底和所述无源光子层之间的电子层包括配置成在其中传播电信号的至少一个电子器件。 位于所述无源光子层之上的有源光子层包括光学耦合到所述无源光子元件并被配置为在所述电信号和所述光信号之间转换的有源光子器件。
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