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http://dx.doi.org/10.3807/KJOP.2022.33.6.252

Controlling the Intensity Distribution of Light at the Output of a Multimode Optical Fiber Using a Polar-coordinate-based Transmission-matrix Method  

Park, Jaedeok (Department of Energy Systems Research, Ajou University)
Jo, Jaepil (Department of Physics, Ajou University)
Yoon, Jonghee (Department of Physics, Ajou University)
Yeom, Dong-Il (Department of Energy Systems Research, Ajou University)
Publication Information
Korean Journal of Optics and Photonics / v.33, no.6, 2022 , pp. 252-259 More about this Journal
Abstract
We have conducted a study to control the light-intensity distribution at the output end of a multimode optical fiber via estimating the transmission matrix. A circularly arranged Hadamard eigenmode phase distribution was implemented using a spatial light modulator, and the transmission matrix of a multimode optical fiber was experimentally obtained using a four-phase method. Based on the derived transmission matrix, the spatial phase distribution of light incident upon the optical fiber was adjusted via the spatial light modulator in advance, to focus the light at a desired position at the optical fiber output. The light could be focused with an intensity up to 359.6 times as high as that of the surrounding background signal at a specific position of the multimode fiber's output end, and the intensity of the focused beam was on average 104.6 times as large as that of the background signal, across the area of the multimode fiber's core.
Keywords
Adaptive optics; Multimode fiber; Speckle; Transmission matrix;
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Times Cited By KSCI : 2  (Citation Analysis)
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