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    • 3. 发明授权
    • Apparatus and method for detecting polarization
    • 用于检测极化的装置和方法
    • US06654121B1
    • 2003-11-25
    • US09913123
    • 2001-08-08
    • Ho Jin JeongBong Wan Lee
    • Ho Jin JeongBong Wan Lee
    • G01J400
    • G01J4/04
    • An apparatus and method for detecting the state of polarization (SOP). The apparatus of the present invention includes a phase retarder and a polarizer which rotate with different speeds. In the method of the present invention, optical signals passed through the rotating phase retarder and the rotating polarizer are detected and their harmonic components related to rotating frequencies of phase retarder and polarizer are analyzed, which gives the Stokes parameters representing the state of polarization. According to the present invention, the amount of phase retardation at the phase retarder can be obtained together with the state of polarization using frequency component analysis, reducing measurement errors. The present invention has advantages in SOP measurement of wide wavelength range, increasing the measurement accuracy.
    • 用于检测偏振状态(SOP)的装置和方法。 本发明的装置包括以不同速度旋转的相位延迟器和偏振器。 在本发明的方法中,检测通过旋转相位延迟器和旋转偏振器的光信号,并分析与相位延迟器和偏振器的旋转频率相关的谐波分量,这给出了表示极化状态的斯托克斯参数。 根据本发明,通过使用频率分量分析,可以与极化状态一起获得相位延迟器的相位延迟量,减少了测量误差。 本发明在宽波长范围的SOP测量中具有优点,提高了测量精度。