Journal
NATURE PHOTONICS
Volume 7, Issue 12, Pages 977-981Publisher
NATURE RESEARCH
DOI: 10.1038/NPHOTON.2013.275
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Funding
- MILLILINK project (Millimeterwellen-Drahtlos-Links in optischen Kommunikationsnetzwerken)
- German Federal Ministry of Research and Education (BMBF) [01BP1023]
- Karlsruhe School of Optics AMP
- Photonics (KSOP)
- Helmholtz International Research School for Teratronics (HIRST) at the Karlsruhe Institute of Technology (KIT)
- Agilent University Relation Program
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In communications, the frequency range 0.1-30 THz is essentially terra incognita. Recently, research has focused on this terahertz gap, because the high carrier frequencies promise unprecedented channel capacities(1). Indeed, data rates of 100 Gbit s(-1) were predicted(2) for 2015. Here, we present, for the first time, a single-input and single-output wireless communication system at 237.5 GHz for transmitting data over 20 m at a data rate of 100 Gbit s(-1). This breakthrough results from combining terahertz photonics and electronics, whereby a narrow-band terahertz carrier is photonically generated by mixing comb lines of a mode-locked laser in a uni-travelling-carrier photodiode. The uni-travelling-carrier photodiode output is then radiated over a beam-focusing antenna. The signal is received by a millimetre-wave monolithic integrated circuit comprising novel terahertz mixers and amplifiers. We believe that this approach provides a path to scale wireless communications to Tbit s(-1) rates over distances of >1 km.
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