Ridge waveguide 1.55 μm DFB lasers with uncooled 10 Gb/s operation at 55 °C

A. B. Massara, K. A. Williams, R. V. Penty, I. H. White, F. H.G.M. Wijnands, P. Crump

Research output: Contribution to journalConference articlepeer-review


Uncooled direct modulation of a 1.55 μm distributed feedback (DFB) laser is demonstrated at 10 Gbit/s is demonstrated. The small signal performance of the laser at 25 °C gives rise to a -3 dB bandwidth in excess of 9 GHz, reducing to 8 GHz at 55 °C. Under uncooled, direct modulation at 10 Gbit/s the back-to-back eye diagrams obtained at temperatures up to 55 °C are found to be open, with extinction ratios of 6 dB for a peak-to-peak current swing of 40 mA. Transmission at 10 Gbit/s over standard singlemode fibre, is demonstrated over 12 km with the uncooled device. Using this device, multi-level coding is demonstrated at 20 Gb/s, and transmission at 5 Gb/s over 700 m of multi-mode fibre (MMF) at 60 °C.

Original languageEnglish
Pages (from-to)203-208
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1 Jan 2000
EventIn-Plane Semiconductor Lasers IV - San Jose, CA, USA
Duration: 24 Jan 200025 Jan 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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