120 Gbit/s high-speed WDM-QPSK free-space optical transmission through 1 km atmospheric channel

• Published in: Electronics letters Vol. 54; no. 18; pp. 1082 - 1084
• Main Authors: Feng, Xianglian, Wu, Zhihang, Wang, Tianshu, Jiang, Huilin, Su, Yuwei, Jiang, Hexin, Gao, Shiming
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 06.09.2018
• Subjects: atmospheric channel; atmospheric turbulence; error statistics; exponentiated Weibull distribution; free‐space optical communication; high‐speed wavelength‐division multiplexing QPSK signals; high‐speed WDM‐QPSK free‐space optical transmission; Optical communication; optical modulation; optical terminal systems; outdoor atmospheric channel; power fluctuation; quadrature phase shift keying; wavelength division multiplexing; WDM channels; Weibull distribution; wireless channels; wavelength division multiplexing; high-speed wavelength-division multiplexing QPSK signals; atmospheric channel; quadrature phase shift keying; atmospheric turbulence; optical terminal systems; outdoor atmospheric channel; optical modulation; high-speed WDM-QPSK free-space optical transmission; WDM channels; exponentiated Weibull distribution; free-space optical communication; wireless channels; Weibull distribution; power fluctuation; error statistics
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2018.5450

The free-space optical communication of high-speed 120 Gbit/s wavelength-division multiplexing (WDM) QPSK signals is demonstrated in an outdoor atmospheric channel with a distance of about 1 km. A pair of optical terminal systems with the capture and tracking functions is used to establish the atmospheric channel. The power fluctuation through the atmospheric turbulence agrees well with the exponentiated Weibull distribution. At the BER of 3.8 × 10−3, the required receiving powers for the three WDM channels are similar, which are all <−15.4 dBm.