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Sapphire resonator

Sapphire resonator

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© The Institution of Electrical Engineers
Published

A resonator made of a sapphire bar has been thermally excited in a flexural mode by heating a thin layer deposited on one side of the bar. The vibration was detected optically. A Q-factor of 800,000 was measured at the resonance frequency of 20,262 Hz.

Inspec keywords: crystal resonators; Q-factor

Other keywords: resonance frequency; Q-factor; resonator; heating; flexural mode; sapphire bar; vibration

Subjects: Piezoelectric and ferroelectric devices

References

    1. 1)
      • Royer, D., Dieulesaint, E., Martin, Y.: `Improved version of a polarised beam heterodyne interferometer', IEEE Ultrasonics Symposium Proceedings, 1985, (in press).
    2. 2)
      • E. Dieulesaint , D. Royer . (1980) , Elastic waves in solids—applications to signal processing.
    3. 3)
      • E. Dieulesaint , D. Royer , H. Rakouth . Optical excitation of quartz resonators. Electron. Lett. , 381 - 382
    4. 4)
      • R.M. de la Rue , R.F. Humphreys , I.M. Mason , E.A. Ash . Acoustic surface wave amplitude and phase measurements using laser probes. Proc. IEE , 117 - 126
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