Abstract
It is shown that optical phase conjugation with the great reflectivity of the weak signal wave can be obtained without the conjugate reference waves in schemes based on parametric instability of stimulated Brillouin scattering in the system of intersections of power pump wave and weak signal wave. Consideration of schemes with two and more beam intersections is presented. Both cases of intensive and weak waves with equal and different frequencies, and the case when one or both waves are wideband, are investigated. The parametric instability conditions determining parametric generation are obtained. The depletion of the pump wave is taken into consideration. The reflectivities and thresholds of the weak signal wave as a function of the pump wave intensity are determined. It is shown that for equal frequencies of pump and signal waves (omega) L1 equals (omega) L2 an increase of the intersecting number N increases the scheme sensitivity and reflectivity. For (omega) L1 does not equal (omega) L2 these parameters weakly depend upon N. It's shown that spontaneous emission noise limits the ultimate sensitivity of these schemes at high pump intensities.© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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