Experimental observation of fractional Fourier transform for a partially coherent optical beam with Gaussian statistics |
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Authors: | Wang Fei Cai Yangjian |
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Affiliation: | Centre for Optical and Electromagnetic Research, Zhejiang University, Hangzhou, China. |
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Abstract: | We report the experimental observation of the fractional Fourier transform (FRT) for a partially coherent optical beam with Gaussian statistics i.e., partially coherent Gaussian Schell-model (GSM) beam]. The intensity distribution (or beam width) and the modulus of the square of the spectral degree of coherence (or coherence width) of a partially coherent GSM beam in the FRT plane are measured, and the experimental results are analyzed and agree well with the theoretical results. The FRT optical system provides a convenient way to control the properties, e.g., the intensity distribution, beam width, spectral degree of coherence, and coherence width, of a partially coherent beam. |
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