>100-GHz Bandwidth Directly-Modulated Lasers and Adaptive Entropy Loading for Energy-Efficient >300-Gbps/λ IM/DD Systems

Nikolaos Panteleimon Diamantopoulos*, Hiroshi Yamazaki, Suguru Yamaoka, Munehiko Nagatani, Hidetaka Nishi, Hiromasa Tanobe, Ryo Nakao, Takuro Fujii, Koji Takeda, Takaaki Kakitsuka, Hitoshi Wakita, Minoru Ida, Hideyuki Nosaka, Fumio Koyama, Yutaka Miyamoto, Shinji Matsuo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We demonstrate DML-based net 325-Gb/s at back-to-back and 321.24-Gb/s after 2-km standard single-mode fiber transmissions for >300-Gbps/λ short-reach optical interconnects. Our net rate performance denotes an increase of ∼34% compared to our previous works, while the pre-FEC rates are >400 Gbps. The DML transmitter is based on a PPR-enhanced, >100-GHz-bandwidth DML, fabricated by our novel membrane-III-V-on-SiC technology. Also wide-band, entropy-loaded DMT modulation is utilized based on a novel adaptive algorithm and via a digitally-preprocessed analog multiplexer. These results pave the way towards low-cost and energy-efficient Terabit Ethernet and a significant step towards achieving DML-based 400-Gbps/λ IM/DD systems in the future.

Original languageEnglish
Article number9186796
Pages (from-to)771-778
Number of pages8
JournalJournal of Lightwave Technology
Volume39
Issue number3
DOIs
Publication statusPublished - 2021 Feb 1
Externally publishedYes

Keywords

  • Adaptive entropy loading
  • direct-detection
  • directly-modulated laser

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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