2026-05-05T20:56:12Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/380342021-06-23T10:18:33Zcom_10324_1158com_10324_931com_10324_894col_10324_1242
UVaDOC
author
Souto Bartolomé, Jorge Manuel
author
Pura Ruiz, José Luis
author
Jiménez López, Juan Ignacio
2019-09-19T15:32:01Z
2019-09-19T15:32:01Z
2019
Journal of Physics D: Applied Physics 52, 343002 (2019)
0022-3727
http://uvadoc.uva.es/handle/10324/38034
10.1088/1361-6463/ab243f
343002
34
Journal of Physics D: Applied Physics
52
1361-6463
Catastrophic optical damage (COD) of high power laser diodes is a crucial factor limiting
ultra high power lasers. The understanding of the COD process is essential to improve the
endurance of the high power laser diodes. COD is observed as a process in which the active
part of the laser diode is destroyed, forming characteristic defects, the so called dark line
defects (DLDs). The DLDs are formed by arrays of dislocations generated during the laser
operation. Local heating associated with non-radiative recombination is assumed to be at the
origin of the COD process. A summary of the methods used to assess the COD, both in real
time and post-mortem is presented. The main approaches developed in recent years to model
the heat transport in the laser structures under non homogeneous temperature distribution are
overviewed. Special emphasis is paid to the impact of the low dimensionality of QWs in two
physical properties playing a major role in the COD process, namely, thermal conductivity
and mechanical strength. A discussion about the impact of the nanoscale in both physical
properties is presented. Finally, we summarize the main issues of the thermomechanical
modelling of COD. Within this model the COD is launched when the local thermal stresses
generated around the heat source overcome the yield stress of the active zone of the laser. The
thermal runaway is related to the sharp decrease of the thermal conductivity once the onset of
plasticity has been reached in the active zone of the laser.
eng
Thermomechanical issues of high power laser diode catastrophic optical damage
info:eu-repo/semantics/article
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URL
https://uvadoc.uva.es/bitstream/10324/38034/3/TR_Souto_Pura_Jimenez%20%282%29.pdf
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73c25b5d162fa5e3488a680b4ca22288
1249352
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TR_Souto_Pura_Jimenez (2).pdf