Tunable grating optical device
    1.
    发明授权
    Tunable grating optical device 失效
    可调光栅光器件

    公开(公告)号:US06546167B1

    公开(公告)日:2003-04-08

    申请号:US10014324

    申请日:2001-12-11

    IPC分类号: G02B628

    摘要: One aspect of the invention is an optical add/drop multiplexer. The optical add/drop multiplexer includes a first optical circulator, the first circulator includes a first port, a second port, and a third port. The optical add/drop multiplexer also includes a first tunable grating coupled to the first port and a second tunable grating coupled to the first grating. The optical add/drop multiplexer further includes a second optical circulator, the second optical circulator includes a fourth port, coupled to the second grating; a fifth port, and a sixth port. Wherein the first tunable grating is a fiber Bragg grating and wherein the second tunable grating is a fiber Bragg grating.

    摘要翻译: 本发明的一个方面是光分插复用器。 光分插复用器包括第一光循环器,第一循环器包括第一端口,第二端口和第三端口。 光分插复用器还包括耦合到第一端口的第一可调光栅和耦合到第一光栅的第二可调光栅。 所述光分插复用器还包括第二光循环器,所述第二光循环器包括耦合到所述第二光栅的第四端口; 第五个港口和第六个港口。 其中第一可调光栅是光纤布拉格光栅,其中第二可调光栅是光纤布拉格光栅。

    Apparatus for extracting a variable from two quadrature signals being
functions of the variable
    2.
    发明授权
    Apparatus for extracting a variable from two quadrature signals being functions of the variable 失效
    用于从作为变量的函数的两个正交信号中提取变量的装置

    公开(公告)号:US5289259A

    公开(公告)日:1994-02-22

    申请号:US927112

    申请日:1992-08-07

    IPC分类号: G01C19/72 G01C19/64 H03D1/00

    CPC分类号: G01C19/72

    摘要: Apparatus 200 for extracting a variable from two quadrature signals which are functions of the variable is disclosed and claimed. The apparatus is particularly suitable for use with a minimum configuration open-loop fiber optic gyroscope 100 to provide a signal (V.sub.out) proportional to the Sagnac phase shift, which is proportional to the rotation rate .OMEGA. of fiber loop 20. The apparatus comprises a trigonometric transformation circuit 30, a dynamic control circuit 32, a feedback loop 33, an adder and a feedforward loop 32.1. The adder, in use, adding an output signal of the dynamic control circuit and a signal in the feedforward loop to provide the signal (V.sub.out), with improved dynamic response. The apparatus also comprises a reset circuit 34 for extending the angular range of the apparatus. An adaptive reset circuit for improving the dynamic range of the apparatus is also disclosed.

    摘要翻译: 公开并要求保护用于从作为变量的函数的两个正交信号中提取变量的装置200。 该装置特别适用于最小配置的开环光纤陀螺仪100以提供与Sagnac相移成正比的信号(Vout),该信号与光纤回路20的旋转速率(Ω)成正比。该装置包括 三角变换电路30,动态控制电路32,反馈回路33,加法器和前馈回路32.1。 在使用中,加法器将动态控制电路的输出信号和前馈环路中的信号相加,以提供信号(Vout),具有改善的动态响应。 该装置还包括用于延伸装置的角度范围的复位电路34。 还公开了一种用于改善装置的动态范围的自适应复位电路。