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Investigations of Quantum Cascade Lasers for Free Space Optics Operating at the Wavelength Range of 8-12 μm

100%
Nowakowski M., Gutowska M., Szabra D., Mikołajczyk J., Wojtas J., Bielecki Z.
Acta Physica Polonica A
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2011
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vol. 120
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issue 4
705-708
EN
The paper presents analysis and preliminary investigations of quantum cascade lasers for free space optics. The lasers radiate in the long wavelength IR spectral range (8-12 μm). Because of lower effects of radiation scattering than in the case of 1.5 μm free space optics, better transmission range can be obtained. The main task of the work was experimental investigation of quantum cascade lasers taking into consideration free space optics applications. In the research, quantum cascade lasers operating in both pulse and continuous wave modes were used. The lasers spectra as well as the operation characteristics (e.g. voltage vs. current) were measured. In conclusion, the quantum cascade lasers parameters for free space optics system applications are summarized.
2
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Investigation of Free Space Optical Detection Module Operating at the Wavelength Range of 8-12 μm

84%
Gutowska M., Nowakowski M., Bielecki Z., Mikolajczyk J., Szabra D., Paliwoda R., Pedzinska M., Pawluczyk J., Gawron W.
Acta Physica Polonica A
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2010
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vol. 118
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issue 6
1143-1147
EN
The paper presents the construction and test results of a long-term radiation detector module for free space optical communication operated at the wavelength range of 8-12 μm. In the module a Polish detector manufactured in the company Vigo System S.A. was applied. High sensitivity of the detection module was achieved through a multi-layered heterostructure HgCdTe with immersion lens, which is optimized for the radiation detection at the wavelength of 10 μm. Detector noises were reduced as a result of detector cooling by means of four-stage thermoelectric cooler. The developed detection module is dedicated to design a next-generation optical data link. The link will be characterized by a greater range in difficult weather conditions in relation to the currently offered links operating at the shorter wavelengths.
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Transmitter with quantum cascade laser for free space optics communication system

84%
Gutowska M., Wojtas J., Pierścińska D., Nowakowski M., Pierściński K., Szabra D., Mikołajczyk J., Bielecki Z.
Bulletin of the Polish Academy of Sciences: Technical Sciences
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2011
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issue 4
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