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Synthesis of longitudinal coherence functions by spatial modulation of an extended light source: a new interpretation
Wei Wang1, Hirokazu Kozaki, Joseph Rosen
1Department of Physics, University of Science and Technology of China, Hefei, Anhui.
Abstract:
Giving a new physical interpretation to the principle of longitudinal coherence control, we propose an improved method for synthesizing a spatial coherence function along the longitudinal axis of light propagation. By controlling the irradiance of an extended quasi-monochromatic spatially incoherent source with a spatial light modulator, we generated a special optical field that exhibits high coherence selectively for a specific pair of points at specified locations along the axis of beam propagation. This function of longitudinal coherence control provides new possibilities for dispersion-free measurements in optical tomography and profilometry. A quantitative experimental proof of principle is presented.
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