Defect formation in degraded laser diodes

Abstract

Conclusions Local hot spots produce a thermal lensing effect that focuses the travelling wave on a point situated ~ 3 - 5 μm behind the heated region. If the heated region is fully degraded, the laser cavity modes present maxima which are located ~ 3 - 5 μm in front of the degraded region. The simulations suggest that a new COD process would be triggered at about 3 μm from the previously heated/degraded region, in good agreement with the experimental CL results