Özet:

In fact that Laser play a very important role in various modern applications including laser safety informatics, biophotonics, and communications technology, we compute in this work the spatial coherence and contrast characteristic functions of laser He-Ne beam with a wavelength of 632.8 nm using a Sagnac interferometer configured in triangle. The interference images of related z-axis shift in phases are presented in the form of computer-generated pattern. These computed images are obtained by displaying the experimental results representing fringe intensities obtained by a CCD camera. The interferometer provides a superposition of two beams traverse the same optical path but in opposite direction, which gives rise to a system of fringes. The exploitation of the results was done in two ways; one was based on the change in the polarization state and the other in the determination of the contrast. The computed images are compared with experimentally obtained patterns; good agreement is obtained as predicted by the theory.

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