Time resolved fluorescence and energy transfer analysis of Nd(3+)-Yb (3+)-Er (3+) triply-doped Ba-Al-metaphosphate glasses for an eye safe emission (1.54 microm).
This paper reports on the preparation and systematic analysis of energy transfer mechanisms in Nd(3+)-Yb(3+)-Er(3+) co-doped new series of barium-alumino-metaphosphate glasses. The time resolved fluorescence of Nd(3+) in triply doped Ba-Al-metaphosphate glasses have revealed that, Yb(3+) ions could function as quite efficient bridge for an energy transfer between Nd(3+) and Er(3+) ions. As a result, a fourfold emission enhancement at 1.54 mum of Er(3+) ions has been achieved through an excitation of (4)F(5/2) level of Nd(3+) at 806 nm for the glass having 3 mol% Yb(3+) with an energy transfer efficiency reaching up to 94%. Decay of donor (Nd(3+)) ion fluorescence has been analyzed based on theoretical models such as direct energy transfer model (Inokuti-Hirayama) and migration assisted energy transfer models (Burshtein's hopping and Yokota-Tanimoto's diffusion). The corresponding energy transfer parameters have been evaluated and discussed. Primarily, electrostatic dipole-dipole (s approximately 6) interactions are found to be responsible for the occurrence of energy transfer process in theses glasses.
Glass Technology Laboratory, Council of Scientific and Industrial Research, Central Glass and Ceramic Research Institute, 196, Raja S.C. Mullick Road, Kolkata, 700032, India.
Atul D
AD
Sontakke
Kaushik
K
Biswas
Ashis K
AK
Mandal
Kalyandurg
K
Annapurna
D000042:Absorption; D000535:Aluminum / Q000737:chemistry*; D001464:Barium / Q000737:chemistry*; D004735:Energy Transfer; D004871:Erbium / Q000737:chemistry; D005123:Eye; D005898:Glass / Q000737:chemistry*; D008674:Metals, Rare Earth / Q000737:chemistry*; D009354:Neodymium / Q000737:chemistry; D055620:Optical Phenomena; D010710:Phosphates / Q000737:chemistry*; D012449:Safety; D013050:Spectrometry, Fluorescence; D013055:Spectrophotometry, Infrared; D013997:Time Factors; D015018:Ytterbium / Q000737:chemistry
D008674:Metals, Rare Earth; D010710:Phosphates; D001464:Barium; D009354:Neodymium; D004871:Erbium; D000535:Aluminum; D015018:Ytterbium