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Abstract

A system and method forming near diffraction limited size beacon for adaptive optical system using a temporally partially coherent laser source. Comprises projection of laser beams through turbulent medium having non-cooperative target using combination of adaptive optical system and short temporal coherence length laser source forming controllable focused laser target beacon. Combines adaptive optical system technology using any wavefront sensing technique making complex field measurements with short coherence length and associated broad spectral bandwidth. The partially coherent laser source forms narrow (near diffraction limited) size region of coherent laser light at target. The coherent region of return dominates signal for any measurement technique computing average of field over wavelength bandpass and can be used to pre-compensate either the partially coherent laser beam, a long coherence length beam of different wavelength or wavelength in bandpass, or both. Pre-compensation of the partially coherent laser beam can lead to signal-to-noise ratio enhancements.

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