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Observations concerning the reply to our comments on "Fiber optic ultrasonic sensor using Raman-Nath light diffraction"

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3 Author(s)
Kwiek, P. ; Inst. of Exp. Phys., Gdansk Univ., Poland ; Mayer, Walter G. ; Reibold, R.

Kwiek et al. comment further on the reply by Wu et al. (ibid. p.956-7), stating that Wu et al. acknowledge that their theoretical model is not applicable. The effect of the ultrasound on the light beam ranges from light deflection, via the Raman-Nath regime, to the transition regime approaching Bragg diffraction for the frequency range of 3-15 MHz and under the experimental conditions indicated by the authors. There is no question that optically detectable signals are received; however, they cannot be described by the theoretical model cited by the authors.<>

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Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:42 ,  Issue: 5 )