Dynamics of emission from dye lasers pumped synchronously by finite picosecond pulse trains

Abstract

In vivo neutron activation analysis was used to measure total body sodium and chlorine in 18 male and 18 female normal adults. Corrections for body size were developed. Normalisation factors were derived which enable the prediction of the normal levels of sodium and chlorine in a subject. The coefficient of variation of normalised sodium was 5.9% in men and 6.9% in women, and of normalised chlorine 9.3% in men and 5 . 5 % in women. In the range examined (40-70 years) no significant age dependence was observed for either element. Total body sodium was correlated with total body chlorine and total body calcium. Sodium excess, defined as the amount of body sodium in excess of that associated with chlorine, also correlated well with total body calcium. In females there was a mean annual loss of sodium excess of 1.2% after the menopause, similar to the loss of calcium.

Ultrashort Pulse Production in Synchronously Pumped Mode-Locked Dye Laser Systems

“…Notably, the peak intensity is essentially unchanged with these approximations, and there is only a slight shortening in the pulse width. We also note that equations (22), (23) and 24correspond to the much considered Lorenz equations [34 -36] for the case of zero forcing.…”

“…These studies have provided closed-form, approximate expressions for the output pulse characteristics as functions of cavity detuning, system gain and several dye parameters. More rigorous numerical modeling of SPML dye lasers has been undertak.en by many groups [14][15][16][17][18][19][20][21][22][23][24][25], since only this technique affords the study of transient effects and specific pulse shape information. The numerical models also have the advantage that theIr framework.…”

“…Much of this computational work. has been done in the rate equation limit, however semiclassical effects have been shown to be significant in the steady state pulse shape [21][22][23][24][25].…”

Dynamics of Ultrashort Pulse Generation and Amplification in Dye Lasers

“…Intensity autocorrelations of the output p비ses with pump polarization angles of 0•, 20•, and 30• for the thresh이dp없ameters (a) r = 1.3, (b) 1 46,. and (c) 4.0.…”

“…Some ofthese analyses started from a rate equation model, and show that the cavity length of the dye laser and the pump laser should be matched very closely to obtain optimum pe냥ormance[9, 11 , 44]. While the rate equation analyses can qualitatively explain many aspects of the mode-locking process in SPML dye lasers, semiclassical effects have been found to have a significant influence on the pulsation waveforms[16,45,46].Although many approaches have been employed in investigating ultrashort pulsation, none of these has addressed the effects of pump p이arization in SPML dye lasers. As most SPML dye lasers are used to generate picosecond or subpicosecond pulses, the pump pulses usually have a pulse width on the order of hundred picoseconds, which is on the same order as the effective lifetime of the excited state.…”