Optical waveguide lens and method of fabrication
    11.
    发明授权
    Optical waveguide lens and method of fabrication 失效
    光波导透镜及其制造方法

    公开(公告)号:US07228033B2

    公开(公告)日:2007-06-05

    申请号:US09812108

    申请日:2001-03-19

    IPC分类号: G02B6/32

    CPC分类号: G02B6/32 G02B6/2552 G02B6/262

    摘要: A spherical lens formed by fusing a generally homogenous glass lens blank to the distal end of an optical fiber, heating and tensioning the lens blank to separate it in two segments with the segment attached to the optical fiber defining a tapered end, and heating the lens blank above its softening point so that the spherical lens forms. The lens blank is fabricated from a 4 weight percent borosilicate glass having a softening point less than that of the core of the optical fiber. The lens member defines a throat region adjacent the optical fiber whose cross-sectional dimension is substantially greater than the diameter of the optical fiber, but substantially less than the diameter of the spherical lens.

    摘要翻译: 通过将大致均匀的玻璃透镜毛坯熔合到光纤的远端而形成的球面透镜,加热和张紧透镜毛坯以将其分离成两段,其中附接到光纤的段限定锥形端,并且加热透镜 空白高于其软化点,从而形成球面透镜。 透镜坯料由软化点小于光纤纤芯的4重量%硼硅酸盐玻璃制成。 透镜构件限定邻近光纤的喉部区域,其横截面尺寸基本上大于光纤的直径,但是基本上小于球面透镜的直径。

    Methods and apparatus for detecting core/cladding interfaces in optical
waveguide blanks
    12.
    发明授权
    Methods and apparatus for detecting core/cladding interfaces in optical waveguide blanks 失效
    用于检测光波导毛坯中的芯/包层界面的方法和装置

    公开(公告)号:US06025906A

    公开(公告)日:2000-02-15

    申请号:US156729

    申请日:1998-09-17

    IPC分类号: G01B11/08 G01M11/00 G01N21/00

    CPC分类号: G01M11/35 G01B11/08

    摘要: Methods and apparatus for detecting air/cladding and core/cladding interfaces of blanks (13) used to produce optical waveguide fibers are provided. A beam of coherent light (30) is scanning across the blank (13) and spatial light intensity patterns produced thereby (FIG. 5) are detected and analyzed. Air/cladding interfaces correspond to a decrease in the width of a unimodal spatial light intensity pattern as the beam moves towards the center of the blank (FIGS. 5A and 5B). Core/cladding interfaces correspond to the onset of an at least bimodal spatial light intensity pattern as the beam moves towards the center of the blank (FIGS. 5D and 5E). By rotating the blank and repeating the measurement process at two or more angular positions, concentricity and ellipticity values for a blank can be determined.

    摘要翻译: 提供了用于检测用于制造光波导纤维的坯料(13)的空气/包层和芯/包层界面的方法和装置。 相干光束(30)正在扫描空白(13),并且由此产生的空间光强度图案(图5)被检测和分析。 空气/包层接口对应于当光束朝向坯料的中心移动时单峰空间光强度图案的宽度的减小(图5A和5B)。 当光束朝向坯料的中心移动时,芯/覆层界面对应于至少双峰空间光强度图案的开始(图5D和5E)。 通过旋转坯件并在两个或多个角位置重复测量过程,可以确定空白的同心度和椭圆率值。

    RF Amplifier apparatus
    13.
    发明授权
    RF Amplifier apparatus 失效
    RF放大器装置

    公开(公告)号:US4380738A

    公开(公告)日:1983-04-19

    申请号:US233059

    申请日:1981-02-10

    申请人: Robert S. Wagner

    发明人: Robert S. Wagner

    IPC分类号: H03F3/19 H03F3/213 H03F3/189

    CPC分类号: H03F3/19 H03F3/213

    摘要: Apparatus for interconnecting two or more high gain, low input impedance amplifier stages for high gain amplification. A first amplifier stage (12) provides a first amplified signal to a coupling circuit. The coupling circuit (26) divides the power of the first amplified signal between the input to a second amplifier stage (14) and a feed forward path (28). The output of the second amplifier stage is combined with the feed forward portion of the first amplified signal in a signal combiner (30). Embodiments (FIGS. 4, 5) employing more than two amplifier stages are described.

    摘要翻译: 用于互连两个或多个高增益低输入阻抗放大器级的装置,用于高增益放大。 第一放大器级(12)向耦合电路提供第一放大信号。 耦合电路(26)将输入之间的第一放大信号的功率划分到第二放大器级(14)和前馈路径(28)之间。 在信号组合器(30)中,第二放大器级的输出与第一放大信号的前馈部分组合。 描述采用多于两个放大器级的实施例(图4,5)。