21 November 1997 Mutual phase conjugation of diffusely reflected light for real-time interferometry
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Abstract
A mutually pumped phase conjugator generates a phase- conjugate replica for each of two mutually incoherent incident optical beams interacting within a photorefractive crystal. This operation is useful for optical communication and interferometry. In this paper, we report a demonstration of mutual phase conjugation for light reflected from a diffuse surface. We studied the dependence of the phase- conjugation reflectivity on the parameters of the optical system. Finally, we built a mutually phase conjugating interferometer to detect the ultrasound vibration of a diffuse object to inspect defects inside it, based on laser generated ultrasound technology. The experimental results and analysis will be given.
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Mingjun M. Zhao, Mingjun M. Zhao, Tin M. Aye, Tin M. Aye, Helen H. Chen, Helen H. Chen, Gajendra D. Savant, Gajendra D. Savant, } "Mutual phase conjugation of diffusely reflected light for real-time interferometry", Proc. SPIE 3172, Optical Technology in Fluid, Thermal, and Combustion Flow III, (21 November 1997); doi: 10.1117/12.293395; https://doi.org/10.1117/12.293395
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