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    • 4. 发明授权
    • Apparatus for monitoring a wideband electromechanical recording system
    • 用于监测宽带机电记录系统的装置
    • US4330882A
    • 1982-05-18
    • US154765
    • 1980-05-30
    • Wilber C. StewartGerard A. Alphonse
    • Wilber C. StewartGerard A. Alphonse
    • G11B3/00G11B27/36
    • G11B3/00
    • Piezoelectric video disc recording cutterheads have small and intricate geometries that make it difficult to compute or measure their mechanical characteristics, especially during the recording process. A monitoring circuit, for use during recording, for monitoring and measuring the mechanical characteristics of a recording cutterhead takes the form of a bridge network. The motional charge or motional current, which are related to the mechanical characteristics of the cutterhead, is measured by means of the bridge network. One branch of the bridge is arranged to include the piezoelectric cutterhead, the other branch comprises a variable capacitor which is adjusted to compensate for the shunt capacitance of the equivalent electrical circuit of the cutterhead. When the variable capacitance is properly adjusted the combination of the currents through the bridge network provides a signal representative of the displacement characteristics of the cutterhead.
    • 压电视盘记录刀头具有小而复杂的几何形状,使得难以计算或测量它们的机械特性,特别是在记录过程中。 用于记录期间用于监测和测量记录刀具的机械特性的监视电路采取桥接网络的形式。 通过桥接网络来测量与刀架的机械特性相关的运动电荷或运动电流。 桥的一个分支被布置成包括压电刀头,另一分支包括可调电容器,其被调节以补偿刀盘的等效电路的分流电容。 当可变电容被适当地调节时,通过桥接网络的电流的组合提供表示刀架的位移特性的信号。
    • 6. 发明授权
    • Low coherence interferometry utilizing magnitude
    • 低相干干涉测量利用大小
    • US07327463B2
    • 2008-02-05
    • US10845853
    • 2004-05-14
    • Gerard A. Alphonse
    • Gerard A. Alphonse
    • G01B9/02G01B11/02
    • G01B9/02014A61B5/0066A61B5/14532A61B5/14558G01B9/0201G01B9/02074G01B9/0209G01B2290/70
    • A method for determining a characteristic of an analyte in a biological sample, the method comprising: directing broadband light by means of a sensing light path at the biological sample, at a target depth defined by the sensing light path and a reference light path; receiving the broadband light reflected from the biological sample by means of the sensing light path; directing the broadband light by means of the reference light path at a fixed reflecting device; and receiving the broadband light reflected from the fixed reflecting device by means of the reference light path. The method also includes interfering the broadband light reflected from the biological sample and the broadband light reflected from the fixed reflecting device; varying an effective light path length of at least one of the reference light path and the sensing light path to define an other target depth; detecting the broadband light resulting from interference of the broadband light reflected from the biological sample and the broadband light reflected from the fixed reflecting device for each of the target depths, to provide an intensity measurement at each of the target depths; and determining the characteristic of the analyte in the biological sample from variations in the intensity measurements.
    • 一种用于确定生物样品中的分析物的特征的方法,所述方法包括:在由感测光路和参考光路定义的目标深度处,通过生物样品处的感测光路引导宽带光; 通过感测光路接收从生物样品反射的宽带光; 在固定的反射装置处通过参考光路引导宽带光; 并且通过参考光路接收从固定反射装置反射的宽带光。 该方法还包括干扰从生物样品反射的宽带光和从固定反射装置反射的宽带光; 改变参考光路和感测光路中的至少一个的有效光路长度以限定另一目标深度; 检测从生物样本反射的宽带光的干扰产生的宽带光和对于每个目标深度从固定反射装置反射的宽带光,以在每个目标深度处提供强度测量; 以及根据强度测量的变化确定生物样品中分析物的特征。
    • 8. 发明授权
    • Superluminescent diode and optical amplifier with wavelength
stabilization using WDM couplers and back output light
    • 超发光二极管和具有波长稳定的光放大器,使用WDM耦合器和反向输出光
    • US6097743A
    • 2000-08-01
    • US159154
    • 1998-09-23
    • Gerard A. Alphonse
    • Gerard A. Alphonse
    • H01L33/00H01S5/0683H01S5/0687H01S5/50H01S3/13
    • H01L33/0045H01S5/0687H01S5/50
    • A wavelength division multiplexer (WDM) is used to transmit the output light from a superluminescent diode (SLD) over a band approximately equal to the full width half maximum (FWHM) SLD bandwidth and its output serves as an IFOG light source. The residual (uncoupled) spectrum contains two sidelobes, which are then separated by another WDM into a lower half centered around .lambda..sub.1 and an upper half centered around .lambda..sub.2. These sidelobes are detected and fed to a differential amplifier whose output is an error signal which is used in a feedback loop to control the SLD drive current or the drive current of a thermoelectric cooler (TEC) on which the SLD is mounted, both of which affect the SLD spectrum. The same results are achieved using the back output light of the SLD chip. An optical amplifier is also implemented by providing access to the front and rear faces of the SLD and splitting off a small portion of the light from one of the facets for the automatic adjustment.
    • 波分多路复用器(WDM)用于在大致等于全宽半最大值(FWHM)SLD带宽的频带上传输来自超发光二极管(SLD)的输出光,其输出用作IFOG光源。 剩余(非耦合)频谱包含两个旁瓣,然后由另一个WDM分离成以λ1为中心的下半部分,以半波为中心的上半部分。这些旁瓣被检测并馈送到差分放大器,其输出为误差信号 其用于反馈回路以控制SLD驱动电流或其上安装SLD的热电冷却器(TEC)的驱动电流,这两者都影响SLD频谱。 使用SLD芯片的反向输出光实现相同的结果。 通过提供对SLD的前表面和后表面的访问并且从其中一个面分离小部分的光以进行自动调整,也实现光放大器。
    • 9. 发明授权
    • High performance angled stripe superluminescent diode
    • 高性能角条纹超发光二极管
    • US4958355A
    • 1990-09-18
    • US330033
    • 1989-03-29
    • Gerard A. AlphonseStephen L. Palfrey
    • Gerard A. AlphonseStephen L. Palfrey
    • H01L33/00H01L33/20H01S5/10H01S5/20H01S5/22
    • H01L33/20H01L33/0045H01S5/10H01S5/20H01S5/22H01S5/1032
    • There is provided a super luminescent light emitting device comprising a semiconductor body including a central region and two opposing end regions extending a predetermined distance from the end faces. A gain guiding linear strip of material adjacent to a side of the active region extends between the end faces and is inclined along its longitudinal axis at a predetermined angle relative to a direction normal to at least one of the end faces. An optical beam path of the device has an optical axis of symmetry extending between the end faces parallel to the longitudinal axis of the strip. The beam path has end lateral boundaries at each of the end regions whose lateral carrier and optical confinement is determined by the gain guiding strip to allow light reflected at the end faces to be refracted out of the optical beam path. The device includes index guiding structure extending on opposite sides of the gain guiding strip over the central region of the device parallel to the longitudinal axis of the gain guiding strip. The index guiding structure determines the central lateral boundaries for the optical beam path to provide lateral carrier and optical confinement of the optical beam path at the central region.
    • 提供了一种超发光发光器件,其包括半导体本体,该半导体本体包括中心区域和从端面延伸预定距离的两个相对的端部区域。 引导邻近有源区域侧的材料的线性条带的增益在端面之间延伸,并且沿着其纵向轴线相对于至少一个端面的方向以预定角度倾斜。 器件的光束路径具有在平行于条的纵向轴线的端面之间延伸的对称光轴。 光束路径在每个端部区域处具有端侧横向边界,其横向载体和光限制由增益引导条确定,以允许在端面处反射的光被折射出光束路径。 该装置包括在增益引导条的相对侧上延伸的引导引导结构,该引导结构平行于增益引导条的纵向轴线在该装置的中心区域上。 索引引导结构确定光束路径的中心横向边界以在中心区域处提供光束路径的横向载波和光限制。