Premium
Erbium‐Doped Fluoroborate Glasses for Near Infrared Broadband Amplifiers
Author(s) -
Saleem Shaik Abdul,
Jamalaiah Bungala Chinna,
Sasikala Thammisetty,
Mohan Babu Asanapuram,
Jayasimhadri Mula,
Rama Moorthy Lalapet
Publication year - 2011
Publication title -
international journal of applied glass science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 34
eISSN - 2041-1294
pISSN - 2041-1286
DOI - 10.1111/j.2041-1294.2011.00052.x
Subject(s) - materials science , radiative transfer , analytical chemistry (journal) , erbium , luminescence , ion , stimulated emission , doping , absorption (acoustics) , atomic physics , emission spectrum , absorption spectroscopy , laser , optics , spectral line , physics , optoelectronics , chemistry , chromatography , astronomy , composite material , quantum mechanics
Erbium ( E r 3+ )‐doped alkali lead tellurofluoroborate ( RLTB ) glasses were prepared and characterized systematically through optical absorption and emission measurements. The emission spectra in the range 450–900 and 1400–1800 nm were recorded by exciting the samples with 532 nm ( Nd : YVO 4 crystal) and 514.5 nm ( A r + laser), respectively. Applying J udd– O felt analysis, the intensity parameters have been determined using experimental oscillator strengths of absorption bands. From the J udd– O felt intensity parameters, some important fluorescence properties such as spontaneous transition probabilities, radiative lifetimes and luminescence branching ratios for the 4 S 3/2 → 4 I 15/2 (0.55 μm), 4 S 3/2 → 4 I 13/2 (0.85 μm), and 4 I 13/2 → 4 I 15/2 (1.54 μm) emission transitions of E r 3+ ion in RLTB glasses have been calculated. The continuous pumping of the samples results in fast nonradiative decay through 2 H 11/2 → 4 F 9/2 (~3500 cm −1 ) transition, which in turn causes the population of E r 3+ ions from 2 H 11/2 state to the higher 4 F 3/2 state. The emission cross sections determined for the 4 I 13/2 → 4 I 15/2 (1.54 μm) transition using the McCumber theory are in good agreement with the values obtained from the J udd– O felt analysis. From evaluated radiative parameters, it is suggested that these RLTB glasses are more suitable candidates for 0.85 and 1.54 μm broadband optical amplifiers.