Multi-photon absorption upconversion luminescence of a Tb^3+-doped glass excited by an infrared femtosecond laser

Abstract

In this paper we presents the near infrared to visible upconversion luminescence in a Tb(3+)-doped ZnO-B(2)O(3)-SiO(2) glass excited with 800nm femtosecond laser irradiation. The upconversion luminescence is attributed to (5)D(4) to (7)F(j) (j=3, 4, 5, 6) transitions of Tb(3+).The relationship between upconversion luminescence intensity and the pump power indicates that a three-photon simultaneous absorption process is dominant in this upconversion luminescence. The calculated value of the three-photon absorption cross section sigma(3) of the glass is 1.832x10(-81)cm(6)6s(2). Also, three-dimensional display is demonstrated based on the multiphoton absorption upconversion luminescence for the first time.