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    • 6. 发明授权
    • Conformal metallization process for the fabrication of semiconductor laser devices
    • 用于制造半导体激光器件的共形金属化工艺
    • US08628988B2
    • 2014-01-14
    • US13333493
    • 2011-12-21
    • Jia-Sheng HuangPhong Thai
    • Jia-Sheng HuangPhong Thai
    • H01L21/18H01L21/28H01L21/8252H01S5/028H01L33/40H01L33/44
    • H01S5/0282H01S5/0425H01S5/22
    • A method of fabricating a semiconductor laser device by forming a semiconductor structure at least part of which is in the form of a mesa structure having a flat top. The steps include depositing a passivation layer over the mesa structure, forming a contact opening in the passivation layer on the flat top of the mesa structure; and depositing a metal contact portion, with the deposited metal contact portion contacting the semiconductor structure via the contact opening. The contact opening formed through the passivation layer has a smaller area than the flat top of the mesa structure to allow for wider tolerances in alignment accuracy. The metal contact portion comprises a platinum layer between one or more gold layers to provide an effective barrier against Au diffusion into the semiconductor material.
    • 一种通过形成半导体结构制造半导体激光器件的方法,其半导体结构至少部分是具有平坦顶部的台面结构的形式。 这些步骤包括在台面结构上沉积钝化层,在台面结构的平坦顶部上的钝化层中形成接触开口; 以及沉积金属接触部分,其中沉积的金属接触部分经由接触开口与半导体结构接触。 通过钝化层形成的接触开口具有比台面结构的平坦顶部更小的面积,以允许更大的对准精度公差。 金属接触部分包括在一个或多个金层之间的铂层,以提供抵抗Au扩散到半导体材料中的有效屏障。
    • 9. 发明授权
    • Optical transmitter with adaptively controlled optically linearized modulator
    • 具有自适应控制光学线性调制器的光发射机
    • US08532499B2
    • 2013-09-10
    • US12428935
    • 2009-04-23
    • John W. CatonJoseph HoberJohn KlimaGustav Witzel
    • John W. CatonJoseph HoberJohn KlimaGustav Witzel
    • H04B10/00G02F1/07
    • H04B10/50572H04B10/5051H04B10/50575H04B10/58
    • An optical transmitter for generating a modulated optical signal to be transmitted over fiber optical link. The transmitter includes: an optical source for producing an optical signal; an optically linearized modulator (OLM) as external modulator for modulating the optical signal produced by the optical source with an information carrying signal. The external modulator includes a first input port for receiving a first DC bias signal, and a second input port for receiving a second DC bias signal. The optical transmitter further includes a pilot tone generator for generating a first pilot signal to be applied to the first input port and a second pilot signal to be applied to the second input port. The first and second pilot signals are capable of producing distortion products in the modulated optical signal. A differential modulation signal is imposed onto either the first pilot signal or the second pilot signal so as to generate a first control signal that alternately adjusts the first DC bias signal and the second DC bias signal in order to minimize the distortion products. The optical transmitter may include a digital based control system that is adapted to reduce composite even and odd order distortions in the OLM.
    • 一种光发送器,用于产生经由光纤链路传输的调制光信号。 发射机包括:用于产生光信号的光源; 作为外部调制器的光学线性化调制器(OLM),用于利用信息携带信号调制由光源产生的光信号。 外部调制器包括用于接收第一DC偏置信号的第一输入端口和用于接收第二DC偏置信号的第二输入端口。 光发射机还包括导频音产生器,用于产生要施加到第一输入端口的第一导频信号和要施加到第二输入端口的第二导频信号。 第一和第二导频信号能够在调制的光信号中产生失真产物。 将差分调制信号施加到第一导频信号或第二导频信号上,以产生交替调整第一直流偏置信号和第二直流偏置信号的第一控制信号,以便最小化失真产物。 光发射机可以包括基于数字的控制系统,其适于减少OLM中的复数均匀和奇数阶失真。
    • 10. 发明授权
    • Multi-mode interference splitter/combiner with adjustable splitting ratio
    • 具有可调分频比的多模式干涉分离器/组合器
    • US08532447B1
    • 2013-09-10
    • US13089999
    • 2011-04-19
    • Martin H. KwakernaakHiroshi Wada
    • Martin H. KwakernaakHiroshi Wada
    • G02B6/26
    • G02B6/125G02B6/2813
    • A multimode interference splitter/combiner that includes a monolithic device for photonically coupling an input optical waveguide to first and second output optical waveguides. The input waveguide may be optically coupled to a first end of a MMI portion, while the first and second output waveguides may be optically coupled to a second end of the MMI portion. The input waveguide is coupled to a planar facet of the MMI portion so that the input waveguide may have a propagation axis that is oriented at an angle with respect to the planar facet of the MMI portion. A desired splitting ratio may be achieved by adjusting the angle between the input waveguide and the MMI portion.
    • 一种多模干涉分离器/组合器,其包括用于将输入光波导光学耦合到第一和第二输出光波导的单片器件。 输入波导可以光耦合到MMI部分的第一端,而第一和第二输出波导可以光耦合到MMI部分的第二端。 输入波导耦合到MMI部分的平面小面,使得输入波导可以具有相对于MMI部分的平面小面成一定角度的传播轴。 可以通过调节输入波导和MMI部分之间的角度来实现期望的分束比。