title: Conversion of orange light into blue light.
abstract: Frequency upconversion in triply ionized praseodymium doped glass with composition TeO(2)-Na(2)O (TNO) system under the excitation with a laser light from a dye laser has been reported and the covalency, bonding parameter, nephalauxetic effect which provides the information about the nature of bonding between the lanthanide ions and the surrounding oxygens for the present glassy material calculated. The energy transfer route followed by the two excited praseodymium ions is observed to be the leading process for the upconversion emission.
authors.affiliation: Department of Chemistry, P. K. Ray College, Dhanbad-826004, Jharkhand, India. rainirupama2006@yahoo.co.in
authors.forename: Nirupama
authors.initials: N
authors.lastname: Rai
authors.forename: Y
authors.initials: Y
authors.lastname: Jha
authors.forename: K P
authors.initials: KP
authors.lastname: Kamal
authors.forename: S
authors.initials: S
authors.lastname: Kumar
authors.forename: V K
authors.initials: VK
authors.lastname: Rai
mesh_terms: D005898:Glass / Q000737:chemistry*; D007834:Lasers; D008027:Light; D011221:Praseodymium / Q000737:chemistry*; D013691:Tellurium / Q000737:chemistry*
chemical_list: C016774:tellurium dioxide; D011221:Praseodymium; D013691:Tellurium