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Effects of spectral cross relaxation and collisional dephasing on the absorption of light by organic-dye solutions

机译：光谱交叉弛豫和碰撞相移对有机染料溶液吸收光的影响

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The nonlinear absorption of intense laser light is used to obtain information about the times required for spectral cross relaxation (T3) and collisional dephasing (T2) in organic-dye solutions. The steady-state transmission experiment of Huff and DeShazer indicates that T2 is in the range 0.1-1 psec for cryptocyanine-methanol, while T3 is in the range 1-10 psec. For DDI-glycerin (1, 1′-diethyl-2, 2′-dicarbocyanine-iodide-glycerin), measurements of ultrashort-pulse transmission as a function of incident energy and optical polarization suggest a value T2=0.4±0.2 psec for that system. These results are based on a new set of rate equations for absorption by inhomogeneously broadened organic-dye solutions. The equations display the effects of spectral cross relaxation and are not limited to light intensities less than those at which coherent interaction effects become important. For the case of ultrashort incident pulses, the equations are extended to account for excited-state absorption, the dependence of absorption on optical polarization, and the existence of a multiplicity of interacting excited states.

机译：强激光的非线性吸收用于获得有关有机染料溶液中光谱交叉弛豫（T3）和碰撞移相（T2）所需时间的信息。 Huff和DeShazer的稳态传输实验表明，隐花菁-甲醇的T2范围为0.1-1 psec，而T3的范围为1-10 psec。对于DDI-甘油（1，1'-二乙基-2，2'-二茂铁碘化物-甘油），超短脉冲传输随入射能量和光偏振变化的测量表明，该值的T2 = 0.4±0.2 psec系统。这些结果是基于一组新的速率方程式，可以通过不均匀加宽的有机染料溶液进行吸收。这些方程式显示了光谱交叉弛豫的影响，并且不仅限于光强度小于相干相互作用变得重要的强度。对于超短入射脉冲，方程可扩展为考虑激发态吸收，吸收对光偏振的依赖性以及存在多个相互作用的激发态。

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Vahey David W.; Yariv Amnon;
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年度 1974
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Effects of spectral cross relaxation and collisional dephasing on the absorption of light by organic-dye solutions

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