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Optics Letters

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  • Vol. 19, Iss. 10 — May. 15, 1994
  • pp: 755–757

Optical detection of ultrasound with a microchip laser

A. R. Duggal, C. P. Yakymyshyn, D. F. Fobare, and D. C. Hurley  »View Author Affiliations


Optics Letters, Vol. 19, Issue 10, pp. 755-757 (1994)
http://dx.doi.org/10.1364/OL.19.000755


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Abstract

A novel optical ultrasonic detector that relies on frequency modulation of a microchip laser is proposed and demonstrated. When the laser is placed in a time-varying acoustic field, the microchip laser cavity length is periodically modulated, creating a frequency-modulated optical output in which the frequency shift is linearly proportional to the acoustic-wave amplitude. With a confocal Fabry–Perot slope filter and a Nd:YAG microchip laser operating at 1.06 μm, a detector response of 7.5 MHz/kPa was measured at an acoustic frequency of 7.75 MHz. A one-dimensional acoustic model is developed to explain the observed detector performance.

© 1994 Optical Society of America

History
Original Manuscript: January 3, 1994
Published: May 15, 1994

Citation
A. R. Duggal, C. P. Yakymyshyn, D. F. Fobare, and D. C. Hurley, "Optical detection of ultrasound with a microchip laser," Opt. Lett. 19, 755-757 (1994)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-19-10-755


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