Wireless sub-THz communication system with high data rate

Abstract

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. Indeed, data rates of 100 Gbit s(-1) were predicted 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-travellingcarrier 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

Characteristics of terahertz wave modulation using wavelength-selective photoexcitation in pentacene/Si and TIPS pentacene/Si bilayers

“…[1][2][3][4] The development of THz devices and systems over the last decade was largely based on the application of new materials such as metamaterials, plasmonic structures, graphene, metal oxides, and organic-based materials. [5][6][7][8][9][10] In particular, technologies utilizing new materials are preferentially applied for developing active THz modulators because the devices that can temporarily control the THz waves are absolutely essential for wireless communication and highly functional sensing/imaging systems.…”

Free-space transmission with passive 2D beam steering for multi-gigabit-per-second per-beam indoor optical wireless networks

“…There are several drawbacks in the current radio alternatives proposed, such as the high costs of acquisition of underused licensed sub-bands [6], and the limited bandwidth (only 7 GHz) of unregulated access provided by the Federal Communications Commission (FCC) in the 60 GHz radio spectrum [7]. Ultimately, the optical spectrum offers a more promising alternative as a substituting future-proof all-optical wireless solution or as a complementary solution to high speed radio wireless communication systems [8][9][10][11][12]. The optical spectrum offers bandwidths orders of magnitude higher than that available in the RF spectrum.…”

60 Gbit/s 400 GHz wireless transmission

“…Carrier frequencies have been increased from W-band (75-110 GHz) to 600 GHz, attempting to explore more available frequency bandwidth. So far the highest singletransmitter bit rates of 100 Gbit/s has been demonstrated at 100 GHz [8] and 237 GHz [13], but only tens of Gbit/s and a few Gbit/s in the frequency range of 300-400 GHz and above have been reported. In addition, although off-line digital signal processing (DSP) is advantageous in investigating those very high data-rate communication systems, real time detection for instant information exchange with negligible latency, is necessary for implementing practical telecommunication systems.…”