Characterization of the temperature sensitivity of gain and recombination mechanisms in 1.3-μm AlGaInAs MQW lasers

T. J. Houle, J. C.L. Yong, C. M. Marinelli, S. Yu, J. M. Rorison, I. H. White, J. K. White, A. J. SpringThorpe, B. Garrett

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35 Citations (SciVal)


The potential of 1.3-μm AlGaInAs multiple quantum-well (MQW) laser diodes for uncooled operation in high-speed optical communication systems is experimentally evaluated by characterizing the temperature dependence of key parameters such as the threshold current, transparency current density, optical gain and carrier lifetime. Detailed measurements performed in the 20°C-100°C temperature range indicate a localized T 0 value of 68 K at 98°C for a device with a 2.8μm ridge width and 700-μm cavity length. The transparency current density is measured for temperatures from 20°C to 60°C and found to increase at a rate of 7.7 A·cm -2 · °C -1 . Optical gain characterizations show that the peak modal gain at threshold is independent of temperature, whereas the differential gain decreases linearly with temperature at a rate of 3 × 10 -4 A -1 ·°C -1 . The differential carrier lifetime is determined from electrical impedance measurements and found to decrease with temperature. From the measured carrier lifetime we derive the monomolecular (A), radiative (B), and nonradiative Auger (C) recombination coefficients and determine their temperature dependence in the 20 °C-80 °C range. Our study shows that A is temperature independent, B decreases with temperature, and C exhibits a less pronounced increase with temperature. The experimental observations are discussed and compared with theoretical predictions and measurements performed on other material systems.

Original languageEnglish
Pages (from-to)132-139
Number of pages8
JournalIEEE Journal of Quantum Electronics
Issue number2
Publication statusPublished - 1 Feb 2005


  • 1.3-μm AlGaInAs active layer materials
  • High-temperature performance
  • Infrared sources
  • Laser gain
  • Quantum-well (QW) lasers
  • QW material system

ASJC Scopus subject areas

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


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