Wednesday, July 1, 2015
Terahertz radiation system transmits data at 32 Gigabits per Second
French researchers have developed and successfully tested a terahertz system capable of transmitting data at a rate of 32 GB per second.
The researchers, working at the French Institute of Electronics, Microelectronics and Nanotechnology (IEMN) and using components produced by Orgeon, US-based optical test equipment manufacturer Tektronix, demonstrated a wireless system capable of transmitting data at 0.4 THz (400 GHz) using key advanced terahertz devices and advanced signal coding.
In the electromagnetic spectrum, terahertz waves occupy a band from 0.1 THz to 30 THz, the so-called “terahertz gap”, positioned between the optical and radio wavelength.
This band, despite being the least explored and developed part of the electromagnetic spectrum, is expected to play a key part in the quest to satisfy the increasing demand for higher speed wireless communication.
The promising nature of terahertz radiation, allied with its ability to penetrate a wide range of non-conducting materials, has been known to scientists for a considerable amount of time. The earliest images generated using the THz band were made in early 1960s.
The demand for faster wireless data traffic has followed as a result of drastic change in the way society creates and shares information. As predicted by a version of “Moore’s Law” appropriate for this technology, wireless data rates have doubled every 18-24 months over the last three decades. Conditional on this trend being followed, wireless Terabit-per-second (TBps) links may come on the market within the next decade.
One of the key motivations for developing transmission technologies using the THz spectrum is that wireless technologies below 0.1 THz cannot support Tbps links.
The fact that compact wireless technologies above 10 THz are not able to support Tbps links either, despite the large bandwith in the so-called Free Space Optical (FSO) communication systems, poses an additional constraint. As a result, new spectral bands are becoming required to support higher data rates. Terahertz Radiation Systems Market
In 2013 and 2014, the global market for terahertz radiation devices and systems was worth approximately $53 million and $54 million respectively.
Currently, the terahertz spectrum is not regulated and the market remains at a nascent stage of its development. However, the large bandwith provided by the THz band presents a highly attractive proposition.
We may soon see a broad range of networking applications, including 5G cellular networks, Terabit Wireless Local Area Networks (T-WLAN), Terabit Wireless Personal Area Networks(T-WPAN), as well as application of the THz band in ultra-broadband secure communication links in the military and defence fields.