Uncooled DBR laser directly modulated at 3.125 Gb/s as athermal transmitter for low-cost WDM systems

Yiran Liu, Andrew R. Davies, Jonathan D. Ingham, Richard V. Penty, Ian H. White

Research output: Contribution to journalArticle

19 Citations (Scopus)


An uncooled three-section tunable distributed Bragg reflector laser is demonstrated as an athermal transmitter for low-cost uncooled wavelength-division-multiplexing (WDM) systems with tight channel spacing. A ±0.02-nm thermal wavelength drift is achieved under continuous-wave operation up to 70 °C. Dynamic sidemode suppression ratio of greater than 35 dB is consistently obtained under 3.125-Gb/s direct modulation over a 20 °C-70 °C temperature range, with wavelength variation of as low as ±0.2 nm. This indicates that more than an order of magnitude reduction in coarse WDM channel spacing is possible using this source.

Original languageEnglish
Pages (from-to)2026-2028
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number10
Publication statusPublished - 1 Oct 2005


  • Direct intensity modulation
  • Optical fiber communications
  • Semiconductor lasers
  • Tunable lasers
  • Wavelength-division-multiplexing (WDM) applications

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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