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Mechanisms and fast kinetics of the catastrophic optical damage (COD) in GaAs‐based diode lasers
Author(s) -
Tomm J.W.,
Ziegler M.,
Hempel M.,
Elsaesser T.
Publication year - 2011
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201000023
Subject(s) - filamentation , diode , laser , randomness , optics , pulse (music) , materials science , optoelectronics , physics , mathematics , statistics , detector
COD diagram determined for a batch of broad‐area AlGaAs diode lasers. The time to COD within a single current pulse is plotted versus the actual average optical power in the moment when the COD takes place. Full circles stand for clearly identified COD events (right ordinate), whereas open circles (left ordinate) represent the pulse duration in experiments, where no COD has been detected. A borderline (gray) exists between two regions, i. e., parameter sets, of presence (orange) and absence of COD (blue). This borderline is somewhat blurred because of the randomness in filamentation of the laser nearfield and scatter in properties of the involved individual devices.