Stokes beams formed by superposition of a completely unpolarized and a completely polarized Gaussian Schell-model beam |
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Authors: | Jing-Shyang HorngYajun Li Emil Wolf |
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Institution: | a Department of Electro-Optical Engineering, National United University, No.1, Lien-Da, Kung-Ching Li, Miao-Li, Taiwan 360, ROC b B.O. Box 975, Great River, NY 11739, USA c Department of Physics and Astronomy, Institute of Optics, University of Rochester, Rochester, NY 14627, USA |
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Abstract: | Analytic expressions and computed examples are given to elucidate the coherence and polarization properties of Stokes beams, i.e. beams formed by superposition of a completely unpolarized and a completely polarized electromagnetic Gaussian Schell-model beam. We found that superposition of such two beams cannot form a Stokes beam with a constant state of polarization on propagation. An additional constraint on the source plane parameters of the two Gaussian Schell-model beams is proposed. The resultant Stokes beam with a constant state of polarization on propagation is found to be a Gaussian Schell-model beam with the same variances as the two constituent Gaussian Schell-model beams. However, the modulus of the Gaussian intensity distributions across the source planes of these beams may be different. |
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Keywords: | Coherence theory Polarization Beams |
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