Correlation between Photoluminescence Properties of Surface Defects and Laser-Induced Damage Threshold of Fused Silica

Table 1

LIDT and relative fluorescence intensity of several types of defects in different regions.

Measured region	Pristine region	Ion beam-treated region	Edge region of the damaged site
LIDT	13.9 J/cm^2	17.2 J/cm^2	4.0 J/cm^2
ODC	5.8 (2.3)	Undetectable	3.5
STE	80.4 (32.2)	Undetectable	72.7
NBOHC	3.8 (1.5)	Undetectable	14.4
Si nanoclusters	10.0 (4.0)	Undetectable	9.4

The PL intensity is normalized. The intensity of the pristine region possesses 40% of the intensity for the damaged site. The value in the bracket for the pristine region is the relative ratio to the PL intensity of the damaged region.