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Microwave Instantaneous Frequency Measurement (IFM) Approach Based on an Integrated Photonic Ti:LiNbO3 Y Branch

  • Zhang, Changsheng (Faculty of Information Engineering and Automation, Kunming University of Science and Technology) ;
  • Zhang, Jiahong (Faculty of Information Engineering and Automation, Kunming University of Science and Technology) ;
  • Zhao, Zhengang (Faculty of Information Engineering and Automation, Kunming University of Science and Technology)
  • Received : 2020.02.06
  • Accepted : 2020.06.29
  • Published : 2020.08.25

Abstract

An approach based on an integrated photonic Ti:LiNbO3 Y branch has been proposed, designed, and analyzed for the microwave instantaneous frequency measurement (IFM). By designing the Y branch with length L = 6545 ㎛ and refractive index NTE - NTM = 0.0764, a complementary optical filter with free spectral range (FSR) of 600 GHz is constituted, which results in a maximum measureable frequency of 300 GHz being obtained. Theoretical analysis on the temperature stability of the Ti:LiNbO3 Y branch shows that the FSR variation of the complementary filter is 0.3% for the temperature change of 100 K, which indicates that the IFM approach will have a better stability. All these results demonstrate that the proposed IFM approach has potential capability to be used for the increasingly higher microwave IFM with better stability.

Keywords

References

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