Abstract
A theoretical scheme of a saser (Sound Amplification by Stimulated Emission of Radiation) is proposed. A liquid with gas bubbles is used as the active medium. Pumping is performed with an alternating electric field or mechanical vibrations of the resonator. Phase bunching of initially incoherent radiators (bubbles) occurs under the action of acoustic radiation forces. The proposed scheme is similar to that of a free-electron laser. Two models of an active medium are studied. In the first model it is assumed that all bubbles have the same radius. In the second model a continuous distribution of bubble radii is studied. The starting values for sasers with square and cylindrical resonators are calculated. It is shown that in all cases studied these conditions are identical, to within a numerical factor. The operation of a saser in a nonlinear regime and the directional pattern of a saser in the saturation regime are studied.
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Zh. Tekh. Fiz. 67, 92–100 (April 1997)
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Zavtrak, S.T., Volkov, I.V. Saser (Sound Amplification by Stimulated Emission of Radiation). Tech. Phys. 42, 406–414 (1997). https://doi.org/10.1134/1.1258812
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DOI: https://doi.org/10.1134/1.1258812