Three-dimensional analysis of the power transfer between crossed laser beams

The power transfer between crossed laser beams made possible by an ion‐acoustic wave is studied. A simple formula is derived for the steady‐state power transfer, which depends on two dimensionless parameters: the ratio of the incident beam intensities and the normalized beamwidth. Numerical simulations show that the transient power transfer is larger than the steady‐state power transfer and usually oscillates in time. The convective depletion of the higher‐frequency beam saturates the power transfer more quickly than the damping of the ion‐acoustic wave.

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