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Optical generation of continuous 76‐MHz surface acoustic waves on YZ LiNbO3

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2 Author(s)
Veith, G. ; IAEE, Technische Universität Wien, A‐1040 Vienna, Austria ; Kowatsch, M.

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The efficient generation of continuous surface acoustic waves (SAW) by focusing the radiation of a synchronously pumped mode‐locked cw dye laser (mode‐locking frequency 76.44 MHz) on the surface of a YZ LiNbO3 crystal is reported. The surface acoustic waves were generated on a small absorbing surface area under varying excitation conditions and detected piezoelectrically by means of a narrowband interdigital SAW transducer, which yielded a voltage responsivity of 1.5 μV/mW cw laser power. The detected electrical signal verified the expected square law dependence of the acoustic power on the incident laser power.

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Applied Physics Letters  (Volume:40 ,  Issue: 1 )