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Proceedings Paper

Quantum cascade laser based system for line-of-sight data transmission in the mid IR
Author(s): Marian A. Taslakov; Valentin Simeonov; Hubert van den Bergh
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Paper Abstract

We report on the application of a pulse distributed feedback (DFB) quantum cascade laser (QCL) for open path data transmission. A not cryogenically cooled, pulse QCL in the 1046 cm-1 range is used. The pulse repetition rate is 100 kHz. In the experiments, the current pulses, driving the laser, are modulated with a low frequency signal. Data transmission over 460 m and 6 km open path were successfully performed. Pulse frequency modulation technique instead of the usual amplitude modulation was chosen because of its high immunity against amplitude noise and signal amplitude changes caused by atmospheric turbulence and aerosols. The demodulated signal is characterized by low distortion, low noise, high dynamic range and wide frequency bandwidth, even for detected laser power variation of more than a thousand times. The haze immunity of the Mid Ir communication channel was studied. Despite the high aerosol optical density, siffucient to suppress completely a probe 20 mW 532 nm beam at a 5 cm distance, no distortion in the IR transmission was observed. In that way the high haze immunity of the mid IR data transmission was demonstrated.

Paper Details

Date Published: 22 April 2005
PDF: 5 pages
Proc. SPIE 5830, 13th International School on Quantum Electronics: Laser Physics and Applications, (22 April 2005); doi: 10.1117/12.618774
Show Author Affiliations
Marian A. Taslakov, Ecole Polytechnique Federale de Lausanne (Switzerland)
Institute of Electronics (Bulgaria)
Valentin Simeonov, Ecole Polytechnique Federale de Lausanne (Switzerland)
Hubert van den Bergh, Ecole Polytechnique Federale de Lausanne (Switzerland)

Published in SPIE Proceedings Vol. 5830:
13th International School on Quantum Electronics: Laser Physics and Applications
Peter A. Atanasov; Sanka V. Gateva; Lachezar A. Avramov; Alexander A. Serafetinides, Editor(s)

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