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http://dx.doi.org/10.3807/KJOP.2019.30.6.230

Searching and Autoalignment Method for Indoor Free-space Optical Communication  

Lee, Kwanyong (LiDAR and Intelligent Optical Node (LION) Laboratory, Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Cho, Seung-Rae (LG Digital Park High UHD Project)
Lee, Chang-Hee (LiDAR and Intelligent Optical Node (LION) Laboratory, Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST))
Publication Information
Korean Journal of Optics and Photonics / v.30, no.6, 2019 , pp. 230-236 More about this Journal
Abstract
We propose and demonstrate a searching and autoalignment method for indoor optical wireless communication, using a cost-effective retroreflective sheet and a microelectromechanical system (MEMS) mirror. We use an extremum-seeking method for a single axis and beam steering with a MEMS mirror to maintain a line of sight (LOS) with the optical link. This autoalignment method shows a receiver sensitivity of -31.87 dBm for a bit rate of 2.5 Gb/s over a 7 m communication link.
Keywords
Free space optical communication; Searching and auto-alignment; Direct line of sight;
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