Wideband and High-Resolution Measurement of Magnitude-Frequency Response for Optical Filters Based on Fixed-Low-Frequency Heterodyne Detection

@article{Zou2017WidebandAH,
  title={Wideband and High-Resolution Measurement of Magnitude-Frequency Response for Optical Filters Based on Fixed-Low-Frequency Heterodyne Detection},
  author={Xinhai Zou and Shangjian Zhang and Heng Wang and Zhiyao Zhang and Jinjin Li and Yali Zhang and Shuang Liu and Yong Liu},
  journal={IEEE Photonics Journal},
  year={2017},
  volume={9},
  pages={1-9}
}
A high-resolution electrical method is proposed for magnitude-frequency response measurement of optical filters based on fixed-low-frequency heterodyne detection. The method consists of an acousto-optic frequency shifter and two phase modulators located in a Mach–Zehnder interferometer architecture. The modulation sidebands in the test arm pass through the optical filter under test and heterodyne with the frequency-shifted modulation sidebands in the reference arm, which allows extracting the… CONTINUE READING

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