Temperature-Insensitive Eye-Opening under 10-Gb/s Modulation of 1.3-µm P-Doped Quantum-Dot Lasers without Current Adjustments

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Published 30 July 2004 • Copyright (c) 2004 The Japan Society of Applied Physics
, , Citation Koji Otsubo et al 2004 Jpn. J. Appl. Phys. 43 L1124 DOI 10.1143/JJAP.43.L1124

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1 Fujitsu Ltd., 10-1 Morinosato-Wakamiya, Atsugi 243-0197, Japan

2 Optoelectronic Industry and Technology Development Association (OITDA), 1-20-10 Sekiguchi, Bunkyo, Tokyo 112-0014, Japan

3 Fujitsu Laboratories Ltd., 10-1 Morinosato-Wakamiya, Atsugi 243-0197, Japan

4 Institute of Industrial Science (IIS), University of Tokyo, Japan

5 Nanoelectronics Collaborative Research Center (NCRC), University of Tokyo, Japan

6 Research Center for Advanced Science and Technology (RCAST), University of Tokyo, 4-6-1 Komaba, Meguro, Tokyo 153-8505, Japan

Dates

  1. Received 30 June 2004
  2. Accepted 1 July 2004
  3. Published

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Abstract

We demonstrate temperature-insensitive eye-opening under 10-Gb/s direct modulation of 1.3-µm p-doped quantum-dot lasers without using any current adjustments. The lasers show a 6.5-dB extinction ratio between 20°C and 70°C. An active region consisting of ten quantum-dot layers with p-type doping enabled this highly temperature-stable dynamic performance, which was much superior to conventional 1.3-µm quantum-well lasers. These results make it possible to use uncooled 1.3-µm quantum-dot lasers without any current adjustments.

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