Intensity distribution and focal depth of axicon illuminated by Gaussian Schell-model beam |
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Authors: | Abdu A Alkelly M Shukri YS Alarify |
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Institution: | Physics Department, Faculty of Science, Sana'a University, Sana'a, Yemen |
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Abstract: | In view of second-order coherence theory, the generalized diffractive axicon illuminated by partially coherent Gaussian Schell-model (GSM) beams is analyzed. An analytical equation for focal depth of axicon without aperture illuminated by spatial partially coherent GSM beam is derived. We showed that the off-axis images can be evaluated by using the method of stationary phase at any correlation state, hence we demonstrated that the intensity distribution of diffracted beam is a superposition of Bessel Beams of various orders. We also showed that the diffracted beam is nondiffractive only on the boundaries of the focal depth. |
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Keywords: | Partially coherent Gaussian Schell model Axicon |
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