Quantum cascade laser based system for line-of-sight data transmission in the mid IR

Marian A. Taslakov; Valentin Simeonov; Hubert van den Bergh

doi:10.1117/12.618774

22 April 2005 Quantum cascade laser based system for line-of-sight data transmission in the mid IR

Marian A. Taslakov, Valentin Simeonov, Hubert van den Bergh

Proceedings Volume 5830, 13th International School on Quantum Electronics: Laser Physics and Applications; (2005) https://doi.org/10.1117/12.618774
Event: 13th International School on Quantum Electronics: Laser Physics and Applications, 2004, Bourgas, Bulgaria

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.

Citation Download Citation

Marian A. Taslakov, Valentin Simeonov, and Hubert van den Bergh "Quantum cascade laser based system for line-of-sight data transmission in the mid IR", Proc. SPIE 5830, 13th International School on Quantum Electronics: Laser Physics and Applications, (22 April 2005); https://doi.org/10.1117/12.618774

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