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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 22,
  • Issue 1,
  • pp. 159-
  • (2004)

12.5-Gb/s Direct Modulation Up to 115 °C in 1.3-µm InGaAlAs-MQW RWG DFB Lasers With Notch-Free Grating Structure

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Abstract

Direct modulation at 12.5 Gb/s of 1.3-µm InGaAlAs distributed feedback (DFB) ridge waveguide (RWG) lasers with low-resistance notch-free gratings running up to 115 °C is experimentally demonstrated. It was achieved by the combination of the high differential gain of an InGaAlAs MQW active layer, high characteristic temperature of RWG structure, and low-resistance notch-free grating. Moreover, successful transmission of 10-Gb/s modulated signals over 30-km standard single-mode fiber was achieved with the laser running at up to 115 °C. These results confirm the suitability of this type of laser for use as the cost-effective light source in 12.5-Gb/s and 10-Gb/s datacom applications.

© 2004 IEEE

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