Abstract: Degradation analysis is a crucial issue for the improvement of sensor laser diodes. Degradation occurs
in three different modes: rapid, gradual and catastrophic. It can be located inside the cavity or at the facet
mirrors. Each type of degradation presents its own signature and different crystal defects appear associated
with them. The main physical mechanisms responsible for laser degradation are analyzed showing
the relation between the main degradation modes and the different materials properties
of the laser structures.
Keywords: Lifetime, Laser Sensor, Reliability, Laser Diodes
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