Variable delay for acoustic surface waves by electro-acousto-optic interaction

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Variable delay for acoustic surface waves by electro-acousto-optic interaction

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© The Institution of Electrical Engineers
Published

Continuosly variable analogue delay is demonstrated by using reflections from a laser-light-induced impedence discontinuity on a photoconductive layer evaporated on an LiNbO3 delay line at 75 MHz. −30dB reflection loss is obtained with a delay range of 20 μs.

Inspec keywords: lithium compounds; ultrasonic delay lines; acousto-optical effects; acoustic surface wave devices; electro-optical effects; acoustoelectric effects

Other keywords: 75 MHz; ultrasonic delay lines; CdSe films; acoustoelectric effects; LiNbO3; electrooptical effects; acoustooptical effects; laser beam application; acoustic surface wave devices

Subjects: Mechanical and acoustical properties of solid surfaces and interfaces; Acoustoelectric effects (electronic transport); Acoustic wave devices

References

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      • Luukkala, M., Meriläinen, P.: `High coupling convolution from a space variant surface wave reflector', Proceedings of IEEE ultrasonics symposium, 1972, Boston, USA, p. 271–273.
    2. 2)
      • H. Hanebrekke , K.A. Ingebrigtsen . Acoustoelectric amplification of surface waves in structure of cadmium selenide-film on lithium niobate. Electron. Lett. , 520 - 521
    3. 3)
      • K.A. Ingebrigtsen . Linear and nonlinear attenuation of acoustic surface waves in a piezoelectric coated with a semiconducting film. J. Appl. Phys. , 454 - 459
    4. 4)
      • B.A. Auld , D.A. Wilson , D.K. Winslow , E. Young . Control of acoustic surface waves with photoconductive CdS film. Appl. Phys. Lett. , 339 - 340
    5. 5)
      • K.M. Lakin , H.J. Shaw . Surface wave delay line amplifiers. IEEE Trans. , 912 - 920
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