Optical parametric fluorescence lifetime distribution

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.