Experimental Comparison of Terahertz and Infrared Signaling in Controlled Atmospheric Turbulence

In order to study and compare propagation features of Terahertz (THz) and infrared (IR) links under different air turbulence conditions, THz and IR free- space communication links at 625 GHz carrier frequency and 1550 nm wavelength, respectively, with a maximum data rate of 2.5 Gb/s have been developed. After propagating through the same channel perturbation caused by air turbulence, attenuation of the channels due to scintillation effects is analyzed by measuring the power and bit-error-rates in each link. Attenuation caused by air turbulence degrades the IR channel but exhibits only minor impact on the THz signal. Numerical simulations of the IR and THz attenuation under different turbulence conditions are presented and compared with the experimental data.

[1]  Tadao Nagatsuma,et al.  A Review on Terahertz Communications Research , 2011 .

[2]  Hamid Hemmati,et al.  Near-Earth Laser Communications , 2009, Near-Earth Laser Communications.

[3]  Otakar Wilfert,et al.  Calculation and Comparison of Turbulence Attenuation by Different Methods , 2010 .

[4]  John F. Federici,et al.  Terahertz wireless communications , 2013 .

[5]  T. Mizuochi,et al.  Recent progress in forward error correction and its interplay with transmission impairments , 2006, IEEE Journal of Selected Topics in Quantum Electronics.

[6]  J. Federici,et al.  2.5 Gbit/s duobinary signalling with narrow bandwidth 0.625 terahertz source , 2011 .

[7]  E. Leitgeb,et al.  Experimental study of bit error rate of free space optics communications in laboratory controlled turbulence , 2010, 2010 IEEE Globecom Workshops.

[8]  Nicolas Perlot,et al.  Evaluation of the scintillation loss for optical communication systems with direct detection , 2007 .

[9]  L. Andrews.  Field guide to atmospheric optics , 2004 .

[10]  J. Federici,et al.  Review of terahertz and subterahertz wireless communications , 2010 .

[11]  Lothar Moeller,et al.  Experimental comparison of performance degradation from terahertz and infrared wireless links in fog. , 2012, Journal of the Optical Society of America. A, Optics, image science, and vision.

[12]  Roger L. Freeman,et al.  Radio system design for telecommunications (2nd ed.) , 1997 .

[13]  Zabih Ghassemlooy,et al.  BPSK Subcarrier Intensity Modulated Free-Space Optical Communications in Atmospheric Turbulence , 2009, Journal of Lightwave Technology.

[14]  M. Teich,et al.  Fundamentals of Photonics , 1991 .

[15]  Jun Terada,et al.  Terahertz wireless communications based on photonics technologies. , 2013, Optics express.

[16]  Hengkai Zhao,et al.  Scintillation of THz transmission by atmospheric turbulence near the ground , 2012, 2012 IEEE Fifth International Conference on Advanced Computational Intelligence (ICACI).

[17]  Olivier Bouchet.  Wireless Optical Communications: Bouchet/Wireless Optical Communications , 2012 .

[18]  Lothar Moeller,et al.  Experimental comparison of terahertz and infrared data signal attenuation in dust clouds. , 2012, Journal of the Optical Society of America. A, Optics, image science, and vision.

[19]  Otakar Wilfert,et al.  Statistical model of free-space optical data link , 2004, SPIE Optics + Photonics.

[20]  A. Bishop,et al.  Suppression of intensity fluctuations in free space high-speed optical communication based on spectral encoding of a partially coherent beam , 2007, physics/0702038.

[21]  Joseph M. Kahn,et al.  Free-space optical communication through atmospheric turbulence channels , 2002, IEEE Trans. Commun..

[22]  Ian F. Akyildiz,et al.  Terahertz band: Next frontier for wireless communications , 2014, Phys. Commun..

[23]  L. Andrews,et al.  Laser Beam Propagation Through Random Media , 1998 .

[24]  Z. Ghassemlooy,et al.  Performance Analysis of Ethernet/Fast-Ethernet Free Space Optical Communications in a Controlled Weak Turbulence Condition , 2012, Journal of Lightwave Technology.

[25]  Roger L. Freeman,et al.  Radio System Design for Telecommunications , 1987 .

[26]  Olivier Bouchet.  Wireless optical telecommunications , 2013 .