17 May 2010 Speckle-based fiber optic method for registration of IR radiation
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A high sensitivity speckle based fiber-optic method for registration of low intensity IR radiation is proposed. The method is based on the effect of variation of the speckle pattern in the far-field of a multimode fiber. IR radiation that falls on a lateral surface of the fiber leads to variation of the speckle image. Computer processing of the speckle image provides information on the amplitude of the perturbation that hits the fiber. An algorithm has been developed for processing of the speckle image and determining of the intensity of IR radiation. The results of computer simulation correlate sufficiently well with experimental ones.
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I. P. Culeac, I. P. Culeac, Iu. H. Nistor, Iu. H. Nistor, M. S. Iovu, M. S. Iovu, A. M. Andriesh, A. M. Andriesh, } "Speckle-based fiber optic method for registration of IR radiation", Proc. SPIE 7469, ROMOPTO 2009: Ninth Conference on Optics: Micro- to Nanophotonics II, 74690G (17 May 2010); doi: 10.1117/12.862384; https://doi.org/10.1117/12.862384


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