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1. 发明申请

US20130302027A1 OPTICAL MEASUREMENT METHOD AND SYSTEM 审中-公开
标题翻译：光学测量方法与系统
公开(公告)号：US20130302027A1
公开(公告)日：2013-11-14
申请号：US13821210
申请日：2011-02-28
申请人： Stuart Murdoch , Douglas Reid , Liam Barry , Regan Watts
发明人： Stuart Murdoch , Douglas Reid , Liam Barry , Regan Watts
IPC分类号： H04B10/07
CPC分类号： H04B10/07 , G01J9/04 , H04B10/07955
摘要： The present application is directed to the measurement of the intensity and phase of high speed optical signals. The present application uses a tunable optical local oscillator, an optical coupler, a photodiode and RF electronics. The tunable laser enables successive measurements to be taken across the optical spectrum allowing the system to measure extremely high bandwidth signals. The signal generated by the local oscillator comprises a component at a frequency between two adjacent modes of the periodic optical signal to be measured. The local oscillator and said periodic signal are optically mixed and sent to a photodiode, the measurement of the phase being based on isolating the resulting beat frequencies. This approach offers a significant improvement over existing time resolved approaches which are limited to the bandwidth of the photodiode (˜50 GHz).
摘要翻译：本申请涉及测量高速光信号的强度和相位。本申请使用可调谐光学本地振荡器，光耦合器，光电二极管和RF电子器件。可调激光器可以在光谱上进行连续的测量，从而允许系统测量极高的带宽信号。由本地振荡器产生的信号包括在要测量的周期性光信号的两个相邻模式之间的频率处的分量。本地振荡器和所述周期信号被光学混合并发送到光电二极管，相位的测量基于隔离所得到的拍频。这种方法比限于光电二极管（〜50 GHz）的带宽的现有时间分辨方法提供了显着的改进。

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