TITLE:
Correlation between Coating Adhesion and Damage Threshold: Simple Method of Reliability Assessment for Optoelectronic Applications
AUTHORS:
Jongwoo Park, Dong-Soo Shin
KEYWORDS:
Optical Coating, Boiling Water Test, Damage Threshold, Adhesion, High-Power Laser
JOURNAL NAME:
Optics and Photonics Journal,
Vol.5 No.4,
April
9,
2015
ABSTRACT: It is
demonstrated that inherent coating adhesion and damage threshold are correlated
for Ta2O5 and HfO2 coatings widely used in
optoelectronic devices. By utilizing a newly proposed 1-h boiling water test
combined with the optical aging under high-power laser irradiation, we show
that an optical coating that survives the 1-h boiling water test withstands the
damage threshold, ensuring the field service life even in harsh environments.
Besides the standard evaluation methods, which may have limitations for
applications required in harsh environments, the 1-h boiling water test can
serve as an alternative method of reliability assessment for optical coatings.
A heuristics herein can be used as a gating item for qualification of optical
coatings for various applications.