Top of page

Font Size

Content Area

Technology

Photonics-Electronics Convergence Laboratory

Optical Signal Processing Using Planar Lightwave Circuits & High-Speed Digital-to-Analog Converters
- Innovative Photonics & Electronics for Future Large-Capacity Transmission -

Technology

Planar lightwave circuits (PLCs) and electronic digital-to-analog converters (DACs) are powerful tools for high-speed optical and electronic signal processing, respectively. By combining them, we are investigating large-capacity optical transmitters that use advanced multilevel modulation formats.

Features

  • Hybrid integration of silica PLCs and an LiNbO3 (LN) phase-modulator array for high-speed optical modulators with complex configurations
  • Advanced circuit design and fabrication technologies based on InP heterojunction bipolar transistors (HBTs) for high-speed analog ICs

Application

By driving a silica-LN integrated modulator with InP-DACs, we have demonstrated the first 400-Gbps signal generation using a single light source and single modulator. The modulator generates two optical subcarriers while the DACs generate multilevel signals.

Fig.1

Abbreviation

PLC
: planar lightwave circuit
DAC
: digital to analog converter
InP HBT
: InP heterojunction bipolar transistor
Sub Content Area
  • R&D
  • Device Technology Laboratories
  • Top
  • Message
  • Organization
  • Technology
  • Publications
  • Library
  • Access
  • Links
  • Environment
  • Recruitment
Footer Area
Copyright © 2016 Nippon Telegraph and Telephone Corporation