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High-Performance Acousto-Optic Modulators for Improving the Recognition Accuracy of Weak Microwave Signals by Radio Frequency Identification Systems

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Titel: High-Performance Acousto-Optic Modulators for Improving the Recognition Accuracy of Weak Microwave Signals by Radio Frequency Identification Systems
Autoren: Weijia Zhang, Xueting Luo, Qiancheng Rao, Peng Jiang
Quelle: Electronics ; Volume 14 ; Issue 4 ; Pages: 658
Verlagsinformationen: Multidisciplinary Digital Publishing Institute
Publikationsjahr: 2025
Bestand: MDPI Open Access Publishing
Schlagwörter: RFID, IDT, FEUDT, acousto-optic modulator, drive power, diffraction efficiency
Beschreibung: By leveraging the high sensitivity of acousto-optic modulators to microwave signals, their integration into RFID systems can significantly improve the detection of faint microwave signals. Traditional acousto-optic modulators, which use bidirectional uniform comb transducers (IDTs), suffer from a 50% microwave signal loss due to the diffraction efficiency being less than 50%, complicating the accurate identification of already weak signals. This paper presents a solution to the 50% loss issue by replacing the IDT with a floating electrode unidirectional transducer (FEUDT), a key structure in detecting microwave signals. The resulting samples exhibited an optical waveguide insertion loss of 8.73 dB, a mode field diameter of 6.48 μm, an operating frequency of 141.2 MHz, and a diffraction efficiency of 61.72%, and required only 0.57 W of driving power. Comparative empirical tests with traditional transducers under identical conditions demonstrated that the FEUDT-based acousto-optic modulator surpassed the 50% diffraction efficiency limit of conventional modulators, which facilitated the detection of weak microwave signals.
Publikationsart: text
Dateibeschreibung: application/pdf
Sprache: English
Relation: Computer Science & Engineering; https://dx.doi.org/10.3390/electronics14040658
DOI: 10.3390/electronics14040658
Verfügbarkeit: https://doi.org/10.3390/electronics14040658
Rights: https://creativecommons.org/licenses/by/4.0/
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  Label: Title
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  Data: High-Performance Acousto-Optic Modulators for Improving the Recognition Accuracy of Weak Microwave Signals by Radio Frequency Identification Systems
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Weijia+Zhang%22">Weijia Zhang</searchLink><br /><searchLink fieldCode="AR" term="%22Xueting+Luo%22">Xueting Luo</searchLink><br /><searchLink fieldCode="AR" term="%22Qiancheng+Rao%22">Qiancheng Rao</searchLink><br /><searchLink fieldCode="AR" term="%22Peng+Jiang%22">Peng Jiang</searchLink>
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  Label: Source
  Group: Src
  Data: Electronics ; Volume 14 ; Issue 4 ; Pages: 658
– Name: Publisher
  Label: Publisher Information
  Group: PubInfo
  Data: Multidisciplinary Digital Publishing Institute
– Name: DatePubCY
  Label: Publication Year
  Group: Date
  Data: 2025
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  Label: Collection
  Group: HoldingsInfo
  Data: MDPI Open Access Publishing
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22RFID%22">RFID</searchLink><br /><searchLink fieldCode="DE" term="%22IDT%22">IDT</searchLink><br /><searchLink fieldCode="DE" term="%22FEUDT%22">FEUDT</searchLink><br /><searchLink fieldCode="DE" term="%22acousto-optic+modulator%22">acousto-optic modulator</searchLink><br /><searchLink fieldCode="DE" term="%22drive+power%22">drive power</searchLink><br /><searchLink fieldCode="DE" term="%22diffraction+efficiency%22">diffraction efficiency</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: By leveraging the high sensitivity of acousto-optic modulators to microwave signals, their integration into RFID systems can significantly improve the detection of faint microwave signals. Traditional acousto-optic modulators, which use bidirectional uniform comb transducers (IDTs), suffer from a 50% microwave signal loss due to the diffraction efficiency being less than 50%, complicating the accurate identification of already weak signals. This paper presents a solution to the 50% loss issue by replacing the IDT with a floating electrode unidirectional transducer (FEUDT), a key structure in detecting microwave signals. The resulting samples exhibited an optical waveguide insertion loss of 8.73 dB, a mode field diameter of 6.48 μm, an operating frequency of 141.2 MHz, and a diffraction efficiency of 61.72%, and required only 0.57 W of driving power. Comparative empirical tests with traditional transducers under identical conditions demonstrated that the FEUDT-based acousto-optic modulator surpassed the 50% diffraction efficiency limit of conventional modulators, which facilitated the detection of weak microwave signals.
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  Data: Computer Science & Engineering; https://dx.doi.org/10.3390/electronics14040658
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  Data: 10.3390/electronics14040658
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  Data: https://doi.org/10.3390/electronics14040658
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        Value: 10.3390/electronics14040658
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      – Text: English
    Subjects:
      – SubjectFull: RFID
        Type: general
      – SubjectFull: IDT
        Type: general
      – SubjectFull: FEUDT
        Type: general
      – SubjectFull: acousto-optic modulator
        Type: general
      – SubjectFull: drive power
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      – SubjectFull: diffraction efficiency
        Type: general
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      – TitleFull: High-Performance Acousto-Optic Modulators for Improving the Recognition Accuracy of Weak Microwave Signals by Radio Frequency Identification Systems
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            NameFull: Weijia Zhang
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            NameFull: Xueting Luo
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            NameFull: Peng Jiang
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              Y: 2025
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          Titles:
            – TitleFull: Electronics ; Volume 14 ; Issue 4 ; Pages: 658
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