By Adrian Korpel
Revised and up to date, this moment version first explains heuristically the physics of acousto-optics prior to featuring the maths of the formal thought. the fabric is built-in to demonstrate and advertise the improvement of recent rules, techniques, theories, innovations and units. The textual content additionally deals sections at the Near-Bragg regime and curved sound wave fronts, insurance of the numerical process, chosen purposes, insurance of anisotropic Bragg diffraction, and fabric on spectral formalisms.
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Extra resources for Acousto-optics
1 l shows an image, obtained with this method, of an acoustic surface wave entering a double-groove wave guide. It is natural to ask if a technique in which the light beam is narrower than the wavelengthof sound should still beclassified as acousto-optic diffraction. After all, the light is refracted by the gradientof refractive index rather than diffracted by the periodicity inherent in the sound wave. There is, however, a venerable precedent for classifying this phenomenon as acoustooptic diffraction: Lucas and Biquard studied it in their first paper on the subject .
In order to treat in what follows immediately, the cases of a traveling wave and a standingwave simultaneously, we will for the configuration of Fig. 12) lies in the fact that the temporal variation of b and p is assumed to be extremely slow comparedto the transit time of the light through the sound field. Consequently, the interaction analysis, for both traveling and standing waves, may proceed on the basis of a “snapshot” of the sound field, during which b and p are constant. Their time-dependence may then be inserted a posteriori in the results of the analysis.
Proc. Indian Acad. , 2, 406 (1935). 19. Raman, C. , and Nath, N. S. , 2, 413 (1935). 20. Raman, C. , and Nath, N. S. , Proc. , 3, 75 (1936). 21. Raman, C. ,and Nath, N. S. , Proc Indian Acad. , 3, 119 (1936). 30 Chapter 2 22. Raman, C. , and Nath, N. S. , Proc. Indian Acad. , 3. 459 (1936). 23. Goodman, J. , Introduction to Fourier Optics, McGraw-Hill, New York (1968). 24. Rayleigh, J. W. , Theory ofsound, Vol. 11, Dover, New York(1945). 25. Kogelnik, Bell Syst. Tech. L,48, 2909 (1969). 26. , “Acousto-Optics,” Applied SolidState Science, Vol.