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Method for measuring the phase error distribution of a wideband arrayed waveguide grating in the frequency domain

机译:在频域中测量宽带阵列波导光栅相位误差分布的方法

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摘要

We describe a method for measuring the phase error distribution of an arrayed waveguide grating (AWG) in the frequency domain when the free spectral range (FSR) of the AWG is so wide that it cannot be covered by one tunable laser source. Our method is to sweep the light frequency in the neighborhoods of two successive peaks in the AWG transmission spectrum by using two laser sources with different tuning ranges. The method was confirmed experimentally by applying it to a 160 GHz spaced AWG with a FSR of 11 THz. The variations in the derived phase error data were very small at +-0.02 rad around the central arrayed waveguides.
机译:当AWG的自由光谱范围(FSR)太宽以致于无法被一个可调激光源覆盖时,我们将描述一种测量频域中的阵列波导光栅(AWG)的相位误差分布的方法。我们的方法是使用两个具有不同调谐范围的激光源来扫描AWG传输光谱中两个连续峰值附近的光频率。该方法通过将其应用到FSR为11 THz的160 GHz间隔AWG上进行了实验验证。导出的相位误差数据的变化在中心阵列波导周围的+ -0.02 rad处非常小。

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