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Optics Letters

Optics Letters


  • 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)

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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

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

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)

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