2.6 Tbit/s On-Chip Optical Interconnect Supporting Mode-Division-Multiplexing and PAM-4 Signal

Yung Hsu, Chun Yen Chuang, Xinru Wu, Guan Hong Chen, Chin Wei Hsu, Yuan Chia Chang, Chi-Wai Chow*, Jyehong Chen, Yin-Chieh Lai, Chien Hung Yeh, Hon Ki Tsang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


In this letter, we combine the use of dense-wavelength-division-multiplexing and mode-division-multiplexing (MDM) with advanced-modulation formats for on-chip optical interconnects. A three-mode MDM multiplexer (MUX) and de-multiplexer (DEMUX) was designed and used. Each wavelength carrier had an aggregate data rate of 192-Gbit/s using 4-level pulse-amplitude-modulation. The mode crosstalk of the MDM MUX/DEMUX was measured to be below -20 dB in the 40-nm wavelength band from 1520 to 1560 nm. Fourteen wavelength channels are multiplexed and successfully transmitted with an aggregate transmission capacity of 2.6 Tbit/s (14 wavelengths × 3 modes × 64 Gbit/s) with all channels satisfying the hard-decision forward-error-correction threshold. Numerical analysis of the mode crosstalk is also performed.

Original languageEnglish
Pages (from-to)1052-1055
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number11
StatePublished - 1 Jun 2018


  • Mode-division multiplexing (MDM)
  • photonic integrated circuits
  • silicon photonics

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