Valstybinis Moksliniu Tyrimu Institutas Fiziniu Ir Technologijos Mokslu Centras

Giedrius Dubosas

Julijanas Zeludevicius

The invention relates to the fields of optical technologies and telecommunication technologies, and is dedicated to determination of the direction of optical beam in free-space optical communication systems. The invention is based on the property of interference optical filters (IOF), that transmittance and reflectance of such filters, for a beam with given optical spectrum, depends on the angle of the beam with respect to IOF surface normal. According to the proposed method, at least one IOF is used, which is rotated by defined angle with respect to the optical axis of the detection device. In the implementation of the detection device with one IOF, two optical power detectors are used, which measure optical power of the beam reflected from the IOF and transmitted through the IOF.

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Vilnius, Lithuania

Giedrius Dubosas