From Event: SPIE Optical Engineering + Applications, 2016
We present the use of a micromirror to dynamically improve an optical wireless communications link. The
signal-to-noise ratio (SNR) is improved by directing the output of a 675 nm laser diode modulated at 10
MHz toward a receiver and by varying the divergence of the output beam using a varifocal, tip-tilt-piston
micromirror. The SNR has a dynamic range of 30 dB for a diffuse source, all by optimizing the overall shape
and direction of the mirror.
Jessica Morrison, Michael Rahaim, Yun Miao, Matthias Imboden, Thomas D. C. Little, Valencia Koomson, and David J. Bishop, "Directional visible light communication signal enhancement using a varifocal micromirror with four degrees of freedom," Proc. SPIE 9954, Fifteenth International Conference on Solid State Lighting and LED-based Illumination Systems, 99540C (Presented at SPIE Optical Engineering + Applications: August 31, 2016; Published: 7 September 2016); https://doi.org/10.1117/12.2237736.
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