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Proceedings Paper

Analysis of InP-based QCLs designed for application in optical transmitter of free-space optics
Author(s): Kamil Pierscinski; Janusz Mikołajczyk; Dariusz Szabra; Dorota Pierścińska; Piotr Gutowski; Zbigniew Bielecki; Maciej Bugajski
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Paper Abstract

In this paper, the study of AlInAs/InGaAs/InP Quantum Cascade Lasers application in Free Space Optical data link is performed. Implementation of such FSO link operated in long-wavelength infrared (LWIR: 8-12 μm) will be unique for construction of so-called RF/FSO hybrid communication system. The range of longer wavelengths provides better data transfer performance in the case of severe weather conditions, especially, fog, low haze or air turbulence. In the frame of this work, series of QCLs for application in FSO system were examined. They are characterized by different geometries and constructions towards best performance in optical link systems operated in the wavelength range of 8-12 μm. The preliminary test of QCLs included electrical measurements of pulsed light-current-voltage characteristics and time-resolved spectra. The obtained results made it possible to determine operation point for FSO. Their modulation performances were tested using the laboratory laser drivers. Based on measurements, both power and time parameters of QCLs pulses were investigated. These results defined critical values for FSO system. The second part of the analysis concerned the spatial parameters of QCLs radiation. Knowledge of spatial characteristics of emission is vital for FSO optics construction. To characterize spatial properties of beams, far-field patterns of emission were registered. Finally, the obtained results made it possible to optimize the optical transmitter construction and further performance of FSO laboratory model. This research was supported by The Polish National Centre for Research and Development grant DOB-BIO8/01/01/2016.

Paper Details

Date Published: 18 October 2017
PDF: 7 pages
Proc. SPIE 10437, Advanced Free-Space Optical Communication Techniques and Applications III, 104370A (18 October 2017);
Show Author Affiliations
Kamil Pierscinski, Institute of Electron Technology (Poland)
Janusz Mikołajczyk, Military Univ. of Technology (Poland)
Dariusz Szabra, Military Univ. of Technology (Poland)
Dorota Pierścińska, Institute of Electron Technology (Poland)
Piotr Gutowski, Institute of Electron Technology (Poland)
Zbigniew Bielecki, Military Univ. of Technology (Poland)
Maciej Bugajski, Institute of Electron Technology (Poland)

Published in SPIE Proceedings Vol. 10437:
Advanced Free-Space Optical Communication Techniques and Applications III
Henry J. White; Florian Moll, Editor(s)

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