λ/4-shifted DFB laser/electroabsorption modulator integrated light source for multigigabit transmission

Masatoshi Suzuki, Hideaki Tanaka, Hidenori Taga, Shu Yamamoto, Yuichi Matsushima

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Abstract

High-speed, low-chirp, and low voltage driving characteristics of 1.55-μm λ/4-shifted distributed-feedback (DFB) laser/InGaAsP electroabsorption modulator integrated light sources are reported. By optimization of the composition and thickness of the modulator waveguide, the driving voltage for a 10-dB extinction ratio was reduced to 1.4-3V, depending on the modulator length in the range of 240-125 μm. High-speed modulation up to 10-Gb/s NRZ modulation was achieved by the integrated device with a 125-μm modulator length. The linewidth enhancement factor of the integrated modulator was estimated to be 0.15-0.48. A 2.4-Gb/s-135-km conventional fiber transmission using the integrated light source driven by less than 1Vp-p was achieved with no power penalty. Successful conventional fiber transmission over 100 km at 5 Gb/s using the integrated light source was also demonstrated.

Original languageEnglish
Pages (from-to)90-95
Number of pages6
JournalJournal of Lightwave Technology
Volume10
Issue number1
DOIs
Publication statusPublished - 1992 Jan
Externally publishedYes

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ASJC Scopus subject areas

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

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