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Interband cascade technology for energy-efficient mid-infrared free-space communication
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作者 PIERRE DIDIER HEDWIG KNÖTIG +9 位作者 OLIVIER SPITZ LAURENT CERUTTI ANNA LARDSCHNEIDER ELIE AWWAD DANIEL DIAZ-THOMAS ANBARANOV ROBERT WEIH JOHANNES KOETH BENEDIKT SCHWARZ FRÉDÉRIC GRILLOT 《Photonics Research》 SCIE EI CAS CSCD 2023年第4期582-590,共9页
Space-to-ground high-speed transmission is of utmost importance for the development of a worldwide broadband network.Mid-infrared wavelengths offer numerous advantages for building such a system,spanning from low atmo... Space-to-ground high-speed transmission is of utmost importance for the development of a worldwide broadband network.Mid-infrared wavelengths offer numerous advantages for building such a system,spanning from low atmospheric attenuation to eye-safe operation and resistance to inclement weather conditions.We demonstrate a full interband cascade system for high-speed transmission around a wavelength of 4.18μm.The low-power consumption of both the laser and the detector in combination with a large modulation bandwidth and sufficient output power makes this technology ideal for a free-space optical communication application.Our proof-of-concept experiment employs a radio-frequency optimized Fabry–Perot interband cascade laser and an interband cascade infrared photodetector based on a type-II InAs/GaSb superlattice.The bandwidth of the system is evaluated to be around 1.5 GHz.It allows us to achieve data rates of 12 Gbit/s with an on–off keying scheme and 14 Gbit/s with a 4-level pulse amplitude modulation scheme.The quality of the transmission is enhanced by conventional pre-and post-processing in order to be compatible with standard error-code correction. 展开更多
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