Abstract
The high potential of optical low-coherence refletometry to
investigate the failure mode of InP-based optical devices is demonstrated
here by considering two examples of burned (under high optical output
power and operating temperature) distributed Bragg reflector lasers on
InP. In addition to monitoring reflections in the conventional reflection
mode, these two-section devices (active amplifier section and passive
Bragg section) are further examined using other in-situ facilities such as
the transmission and edge electroluminescence measurements. A
comprehensive analysis of these data in comparison to a reference device
permitted the following: 1) the spatial localization of burning induced
damage only in the amplifier section; 2) some relevant information on the
nature of defects in the damaged region, such as their nonradiative
character and structural modifications in multiquantum wells, which
tentatively are attributed to the occurrence of intermixing between well
and barrier layers.
© 2003 IEEE
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