caa a22 4500 467916039 CHVBK 20180406152903.0 cr unu---uuuuu 170328e20060701xx s 000 0 eng 10.1134/S002044120604018X doi (NATIONALLICENCE)springer-10.1134/S002044120604018X A speckle-correlation method for determining the dispersion of optical fibers and scattering parameters in optically inhomogeneous media using lasers with frequency deviation [Elektronische Daten] [G. Akchurin, A. Akchurin] A speckle-correlation method for determining the dispersion of short optical fibers and phase delays in multiply scattering bulk media is described. This method is based on measurements of the deterministic transverse dynamics of speckle structures in the output radiation of fibers or stationary scattering media upon tuning of the laser-radiation frequency. The range of measurements of phase delays is inversely proportional to the laser-radiation deviation and depends linearly on the fiber length or thickness of the scattering medium. Probing with radiation of tunable single-frequency quantum-dimensional laser diodes (λ = 635 nm and Δν = c/2Ln ≈ 130 GHz) and solid-state microlasers (YAG:Nd, λ = 532 nm and Δν = c/2Ln ≈ 84 GHz) allowed the dispersion to be determined in multimode (D = 50 μm and NA = 0.2) fibers with a minimum length <1 m and low-mode (D = 9 μm and NA = 0.17) fibers with a length of ∼20m. The use of digital video cameras for recording scattered speckle fields during probing of fluoroplastic phantoms with a thickness of <2 cm allowed measurements of phase delays during laser frequency tuning with a deviation of several tens of gigahertz. This technique can serve as the basis for developing coherent optical tomographs. Pleiades Publishing, Inc., 2006 42.30.Wb nationallicence 42.81.Qb nationallicence Akchurin G. Chernyshevskii Saratov State University, ul. Astrakhanskaya 83, 410012, Saratov, Russia aut Akchurin A. Chernyshevskii Saratov State University, ul. Astrakhanskaya 83, 410012, Saratov, Russia aut Instruments and Experimental Techniques Nauka/Interperiodica 49/4(2006-07-01), 553-558 0020-4412 49:4<553 2006 49 10786 https://doi.org/10.1134/S002044120604018X text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S002044120604018X text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Akchurin G. Chernyshevskii Saratov State University, ul. Astrakhanskaya 83, 410012, Saratov, Russia aut NATIONALLICENCE 700 1- Akchurin A. Chernyshevskii Saratov State University, ul. Astrakhanskaya 83, 410012, Saratov, Russia aut NATIONALLICENCE 773 0- Instruments and Experimental Techniques Nauka/Interperiodica 49/4(2006-07-01), 553-558 0020-4412 49:4<553 2006 49 10786 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer