Optical EngineeringDiffraction of light by two parallel adjacent ultrasonic beams of the frequency ratio 1:1, beyond the Raman-Nath diffraction regime
|Format||Member Price||Non-Member Price|
Light diffraction by two adjacent ultrasonic waves having the same frequencies is examined experimentally beyond the Raman?Nath diffraction regime. Measurements were taken of the 0 and ±1 order diffracted light intensities for a few (settled) Raman - Nath parameter values, as a function of the phase shift between the sound beams. The experimental results obtained are discussed and compared with relevant, generalized, theoretically numerical predictions, as well as with the ones obtained by means of the 0 and ±1 order approximation only. In both cases, however, within all the experimental conditions considered, a quite good quantitative agreement between the experimental data and the appropriate theoretical predictions is observed.