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Optics Letters

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  • Vol. 25, Iss. 9 — May. 1, 2000
  • pp: 613–615

Scanning Michelson interferometer for imaging surface acoustic wave fields

J. V. Knuuttila, P. T. Tikka, and M. M. Salomaa  »View Author Affiliations


Optics Letters, Vol. 25, Issue 9, pp. 613-615 (2000)
http://dx.doi.org/10.1364/OL.25.000613


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Abstract

A scanning homodyne Michelson interferometer is constructed for two-dimensional imaging of high-frequency surface acoustic wave (SAW) fields in SAW devices. The interferometer possesses a sensitivity of ∼10-5nm/√Hz , and it is capable of directly measuring SAW's with frequencies ranging from 0.5 MHz up to 1 GHz. The fast scheme used for locating the optimum operation point of the interferometer facilitates high measuring speeds, up to 50,000 points/h. The measured field image has a lateral resolution of better than 1 mu;m . The fully optical noninvasive scanning system can be applied to SAW device development and research, providing information on acoustic wave distribution that cannot be obtained by merely electrical measurements.

© 2000 Optical Society of America

OCIS Codes
(110.7170) Imaging systems : Ultrasound
(120.1880) Instrumentation, measurement, and metrology : Detection
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.7280) Instrumentation, measurement, and metrology : Vibration analysis
(240.6690) Optics at surfaces : Surface waves
(350.4010) Other areas of optics : Microwaves

Citation
J. V. Knuuttila, P. T. Tikka, and M. M. Salomaa, "Scanning Michelson interferometer for imaging surface acoustic wave fields," Opt. Lett. 25, 613-615 (2000)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-25-9-613


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