Degradation and Reliability

  • Govind P. Agrawal
  • Niloy K. Dutta


The performance of semiconductor lasers can degrade during their operation. This degradation is usually characterized by an increase in the threshold current that is often accompanied by a decrease in the external differential quantum efficiency. The dominant mechanism responsible for this degradation is determined by one or several of the fabrication processes including epitaxy, device processing, and bonding. In addition, the degradation rate of lasers processed from a given wafer depends on the operating conditions, namely, the operating temperature and injection current. Although many of the degradation mechanisms are not fully understood, an extensive amount of empirical observations exists in the literature. These observations have allowed the fabrication of InGaAsP laser diodes with an extrapolated median lifetime in excess of 25 years1 at an operating temperature of 10°C.


Semiconductor Laser Threshold Current Reliability Assurance EBIC Signal Dark Line Defect 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© AT&T 1993

Authors and Affiliations

  • Govind P. Agrawal
    • 1
  • Niloy K. Dutta
    • 2
  1. 1.The Institute of OpticsUniversity of RochesterRochesterUSA
  2. 2.AT&T Bell LaboratoriesMurray HillUSA

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