1024 QAM (60 Gbit/s) single-carrier coherent optical transmission over 150 km.
We demonstrate a record QAM multiplicity of 1024 levels in a single-carrier coherent transmission. A frequency-domain equalization technique and a back-propagation method are adopted to compensate for distortions caused by hardware imperfections and fiber impairments, respectively. As a result, 60 Gbit/s polarization-multiplexed transmission over 150-km has been achieved at 3 Gsymbol/s within an optical bandwidth of only 4.05 GHz.
Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai-shi, Miyagiken 980-8577 Japan. koizumi@riec.tohoku.ac.jp
Yuki
Y
Koizumi
Kazushi
K
Toyoda
Masato
M
Yoshida
Masataka
M
Nakazawa
D016477:Artifacts; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007834:Lasers; D008872:Microwaves; D055100:Optical Fibers; D013685:Telecommunications / Q000295:instrumentation*