80 Gbit/s, 256 QAM coherent transmission over 150 km with an injection-locked homodyne receiver | Zendy

Keisuke Kasai | Zendy; Yixin Wang | Zendy; Shohei Beppu | Zendy; Masato Yoshida | Zendy; Masataka Nakazawa | Zendy

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80 Gbit/s, 256 QAM coherent transmission over 150 km with an injection-locked homodyne receiver

Author(s) -

Keisuke Kasai,

Yixin Wang,

Shohei Beppu,

Masato Yoshida,

Masataka Nakazawa

Publication year - 2015

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.23.029174

Subject(s) - homodyne detection , direct conversion receiver , optics , phase noise , quadrature amplitude modulation , physics , qam , phase modulation , injection locking , signal (programming language) , transmission (telecommunications) , telecommunications , laser , computer science , bit error rate , decoding methods , programming language

We demonstrate an 80 Gbit/s, 5 Gsymbol/s 256 QAM coherent optical transmission by employing an injection-locked homodyne detection circuit based on both fiber lasers and LDs. With either circuit, low phase noise carrier-phase synchronization between the transmitted data signal and an LO were achieved with a phase noise variance of only 0.2 degrees. As a result, we have successfully transmitted an 80 Gbit/s data signal over 150 km with a simple receiver configuration. This is the highest QAM multiplicity yet realized with injection-locked homodyne detection.

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