Title :
Pulse length and terminal-level lifetime dependence of energy extraction for neodymium-doped phosphate amplifier glass
Author :
Bibeau, Camille ; Trenholme, John B. ; Payne, Stephen A.
Author_Institution :
Lawrence Livermore Nat. Lab., CA, USA
fDate :
8/1/1996 12:00:00 AM
Abstract :
On the basis of detailed numerical calculations, we have formulated an empirical expression for the saturation fluence in neodymium-doped phosphate amplifier glass that explicitly depends upon the ratio of the pulse width to the terminal-level lifetime. The empirical expression, when substituted within the Frantz-Nodvik solution for energy extraction, can be used to determine the impact of the lower level lifetime on the energy extracted from Nd:phosphate glass amplifiers. We used our empirical solution to model experimental gain-saturation data and determine the terminal-level lifetime. We compared this value with two independent experiments and found that all three experiments yielded similar results. The terminal-level lifetime of LG-750 at room temperature is found to be 253 ps ±50 ps
Keywords :
fluorescence; laser theory; neodymium; optical saturation; radiative lifetimes; solid lasers; time resolved spectra; Frantz-Nodvik solution; LG-750; Nd-doped phosphate amplifier glass; Nd:phosphate glass amplifiers; empirical expression; empirical solution; energy extraction; gain-saturation data; lower level lifetime; numerical calculations; pulse length; pulse width; room temperature; saturation fluence; terminal-level lifetime dependence; Data mining; Glass; Laser modes; Laser theory; Laser transitions; Predictive models; Pulse amplifiers; Pump lasers; Space vector pulse width modulation; Stationary state;
Journal_Title :
Quantum Electronics, IEEE Journal of
