A WDM/TDM access network based on broad t-band wavelength resource using quantum dot semiconductor devices

Nazirul Afham Idris, Naokatsu Yamamoto, Kouichi Akahane, Katsumi Yoshizawa, Yasunori Tomomatsu, Makoto Sudo, Tadashi Hajikano, Ryogo Kubo, Takuya Uesugi, Takahiro Kikuchi, Hiroyuki Tsuda

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11 Citations (Scopus)


A wavelength-division multiplexing/time-division multiplexing (WDM/TDM) network exploiting the broad wavelength range of T-band (1000-1260 nm) is proposed. The network is based on different wavebands of downlink and uplink channels, with each transmitter consisting of a wavelength tunable laser utilized for more than one user through wavelength tuning. The downlink section of the network also introduces interconnecting optical lines and semiconductor optical amplifiers (SOAs), pairing up each of the downlink wavebands to provide structural redundancy by allowing transmitters to be shared between the paired wavebands through TDM. Quantum dot (QD)-based wavelength tunable lasers and SOAs were fabricated for a preliminary demonstration experiment. Error-free transmission with less than 1 dB of power penalty was obtained for a wavelength range of 24.2 nm (5.6 THz). The QD-SOAs exhibited a decent rise and fall time, as well as extinction ratios throughout the wavelength range, which enable it to be used as path switches.

Original languageEnglish
Article number7389328
JournalIEEE Photonics Journal
Issue number1
Publication statusPublished - 2016 Feb 1



  • Quantum dot semiconductor optical amplifier
  • Quantum dot tunable laser
  • WDM access network

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

Idris, N. A., Yamamoto, N., Akahane, K., Yoshizawa, K., Tomomatsu, Y., Sudo, M., Hajikano, T., Kubo, R., Uesugi, T., Kikuchi, T., & Tsuda, H. (2016). A WDM/TDM access network based on broad t-band wavelength resource using quantum dot semiconductor devices. IEEE Photonics Journal, 8(1), [7389328]. https://doi.org/10.1109/JPHOT.2016.2520831