光参量荧光寿命分布
Optical parametric fluorescence lifetime distribution
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摘要: 根据荧光寿命定义和放大过程获得的增益方程，研究了新型非线性晶体BaAlBO3F2中三种不同的相位匹配模式下中心波长532 nm泵浦的参量荧光光子寿命的分布特性。结果表明，当注入单色信号光时，参量荧光寿命随泵浦光相位匹配角的增加由椭圆体分布变化为圆环体分布。采用宽带信号光时，则由分散分布改变为集中在近200 nm波长范围内分布，并随泵浦光相位匹配角的增加而逐步减小。考虑宽带泵浦光注入情况时，参量荧光寿命的分布范围由于相位匹配范围增加而随之扩展。Abstract: According to the definition of fluorescence lifetime and the gain equation of optical parametric amplification, optical parametric fluorescence lifetime(OPFL) distribution characteristics are studied in a novel nonlinear crystal BaAlBO3F2 under three different phase matching modes. The calculation results indicate that for homochromatic signal injection, OPFL distribution changes from an ellipsoid to a torus with the increasing of pump phase matching angle. When a broadband signal is injected, OPFL shows firstly a scattered distribution and then a concentrated distribution. If a broadband pump is injected into the optical parametric amplifier, the range of OPFL distribution expands greatly for the increasing phase matching range.
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