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    • 3. 发明申请
    • Attenuator test system
    • 衰减器测试系统
    • US20050171716A1
    • 2005-08-04
    • US10767038
    • 2004-01-29
    • Jeffrey ClarkeRobert BuckleyDean Silhan
    • Jeffrey ClarkeRobert BuckleyDean Silhan
    • G01R27/28
    • G01R27/28
    • System for testing attenuators by a flatness and standing wave ratio tests which includes a vector network analyzer (VNA) adapted to be coupled to a device under test (DUT) and which provides an input stimulus signal for the DUT and, when certain conditions are satisfied, receives an output signal from the DUT, and a calibration receiver adapted to be coupled to the DUT via a down-converter. When certain conditions are satisfied, the output signal from the DUT is sent to the calibration receiver (through the down-converter to be possibly modified thereby depending on the testing frequency). A signal generator provides a local oscillator (LO) signal for the down-converter. A control unit is connected to the instruments and embodies software which analyzes the testing conditions, i.e., the attenuator value being tested, and selects whether the network analyzer or the calibration receiver will measure the output signal from the DUT.
    • 用于通过平坦度和驻波比测试来测试衰减器的系统,其包括适于耦合到待测器件(DUT)的矢量网络分析器(VNA),并且为DUT提供输入激励信号,并且当满足某些条件时 从DUT接收输出信号,以及适于通过下变换器耦合到DUT的校准接收器。 当满足某些条件时,来自DUT的输出信号被发送到校准接收器(通过下变频器可以根据测试频率进行修改)。 信号发生器为下变频器提供本地振荡器(LO)信号。 控制单元连接到仪器并体现了软件,其分析测试条件,即被测试的衰减器值,并选择网络分析仪或校准接收机是否将测量来自DUT的输出信号。
    • 5. 发明申请
    • System and method for reducing interferometric distortion and relative intensity noise in directly modulated fiber optic links
    • 用于减少直接调制光纤链路中的干涉失真和相对强度噪声的系统和方法
    • US20060078339A1
    • 2006-04-13
    • US10960159
    • 2004-10-07
    • Willie NgDavid PersechiniRobert Buckley
    • Willie NgDavid PersechiniRobert Buckley
    • H04B10/04
    • H04B10/504H01S5/06817
    • A laser transmitter with a feedback control loop for minimizing noise. The novel laser transmitter includes a laser, an external reflector adapted to form an extended cavity to the laser, and a feedback control loop adapted to detect noise in the laser and in accordance therewith, adjust the optical phase of the extended cavity such that the noise is at a desired level. The optical phase of the extended cavity is adjusted by adjusting an operating parameter of the laser, such as its bias current. In an illustrative embodiment, the feedback control loop is adapted to compute the rate of change of the noise with respect to bias current and in accordance therewith, adjust the bias current of the laser such that relative intensity noise and interferometric intermodulation distortion are simultaneously minimized.
    • 具有反馈控制回路的激光发射器,用于最小化噪声。 新颖的激光发射器包括激光器,适于形成到激光器的延伸空腔的外部反射器,以及适于检测激光器中的噪声的反馈控制回路,并且根据该激光器调节扩展腔体的光学相位,使得噪声 处于所需的水平。 通过调整激光器的工作参数(如偏置电流)来调节扩展腔的光学相位。 在说明性实施例中,反馈控制环路适于计算噪声相对于偏置电流的变化率,并且根据其调整激光器的偏置电流,使得相对强度噪声和干涉式互调失真同时最小化。
    • 6. 发明授权
    • Bellmouth duct fitting
    • Bellmouth管道配件
    • US5370360A
    • 1994-12-06
    • US96455
    • 1993-07-26
    • Robert Buckley
    • Robert Buckley
    • F16K1/22
    • F16K1/22
    • This is a unitary bellmouth duct fitting having a tubular body portion and a bellmouth portion; the tubular body portion has a circumferential terminal edge from which the bellmouth portion or flange radially and integrally extends and the bellmouth portion merges with the tubular body portion to provide a less than two inch radius; the bellmouth portion has a lower surface which has a double sided adhesive first gasket engaged therewith and has a series of spaced holes formed therethrough, the first gasket is of a somewhat malleable material, and is of a ring-shaped configuration, the tubular body portion has an inner surface, the first gasket is of a malleable material and of a ring-shaped configuration, a first, through aperture is formed in the body portion spaced from the bellmouth portion, a second through aperture is formed in the body portion on the same horizontal plane as the first aperture, a damper fitted within the bellmouth duct fitting, the damper of a disk like configuration, has an upper surface, a peripheral edge and an outside diameter a solid threaded bearing is attached to the upper surface of the damper at opposite sides of the peripheral edge, each of the solid threaded bearings includes a threaded element, the threaded elements of the solid threaded bearings extend beyond the peripheral edge of the damper, one of the threaded elements passed through the first aperture and the other threaded element passed through the second aperture, a gasketed washer engaged around the threaded element bearing against the inner surface adjacent the second aperture.
    • 这是具有管状主体部分和喇叭口部分的单一喇叭口管道配件; 管状主体部分具有周向端部边缘,喇叭口部分或凸缘径向并整体地延伸并且喇叭口部分与管状体部分合并以提供小于2英寸的半径; 喇叭口部具有下表面,该下表面具有与其接合的双面粘合剂第一垫片,并且具有穿过其形成的一系列间隔开的孔,该第一垫圈是稍微有延展性的材料,并且是环形构造,管状主体部分 具有内表面,第一垫圈是可延展材料并具有环形构造,在与喇叭部分间隔开的主体部分中形成第一通孔,第二通孔形成在主体部分上 与第一孔相同的水平平面,安装在喇叭口管道配件内的阻尼器,盘形结构的阻尼器具有上表面,周缘和外径,实心螺纹轴承附接到阻尼器的上表面 在外围边缘的相对侧,每个实心螺纹轴承包括螺纹元件,实心螺纹轴承的螺纹元件延伸超出外周边缘 阻尼器中的一个螺纹元件中的一个穿过第一孔,而另一个螺纹元件穿过第二孔,垫圈垫圈围绕螺纹元件轴承抵靠邻近第二孔的内表面。