Doping withphosphorusofsilicondioxideisessentialintele-
communication fibers [1]. Thatmodifies refractionindex.Also
phosphorus isusedforRareEarthdopingofsilica [2]. Widely
applied forrefractionindexmodification GeO2 possesses strong
luminescence, howeverluminescencepropertiesofphosphorus
doped silicondioxideisnotyetwellstudied.