Evolution of Oxygen Deficiency Center on Fused Silica Surface Irradiated by Ultraviolet Laser and Posttreatment

Table 1

Effects of ODCs reduction on silica surface using two treatment methods.

Treatment method	Original	After UV irradiation in vacuum	Repaired with pulse UV laser in excessive oxygen	Repaired with oxygen plasma
PL peak intensity; of ODCs/count	4.55×10^4	6.25×10^4	3.51×10^4	3.51×10^4