New Detection Modules for Free Space Optics

Abstract

The paper presents the construction and test results of new detection modules for Free Space Optical Data Link operated in the 8-12 um wavelength range.

In these modules Polish detectors manufactured at the Polish VIGO System Ltd. company were applied. High sensitivity of the detection modules was achieved using photodiodes with immersion lens. Detector noise was reduced as a result of photodiode cooling by means of a four-stage thermoelectric cooler and reverse biasing.

The developed detection modules will be used in a next-generation optical link capable of operating in more difficult weather conditions as compared to the links currently offered.

Two detection modules were tested. The first of them consists of a photodiode without biasing, and the second one of a photodiode with reverse biasing

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