H. Mawatari et al., Degradation behavior of the active region and passive region in buried heterostructure (BH) distributed Bragg reflector (DBR) lasers, MICROEL REL, 39(12), 1999, pp. 1857-1861
Changes in the threshold current and wavelength tuning characteristics due
to the degradation of the active region and passive region in buried hetero
structure (BH) distributed Bragg reflector (DBR) lasers are experimentally
investigated. These changes are caused by the decrease in recombination car
rier lifetime due to degradation. It is shown that the decrease in the carr
ier lifetime is mainly accelerated as a result of increased carrier density
. This suggests that the degradation of the active region depends more stro
ngly on the threshold current density than on the operating current, On the
other hand, the degradation of the passive region is related to the inject
ed current density, which affects the stability of the wavelength tunabilit
y of DBR lasers. (C) 1999 Elsevier Science Ltd. All rights reserved.