1 SFL Self-focal length: a technique for measuring the nonlinear refractive index, with comparison to DFWM--degenerate four-wave mixing
2 LaK--(LaC, LaCl): a kind of optical glass(lanthanum crown), with composition of B2O3(SiO2)-La2O3-ZnO-MO. LaK14 is equavalent to Mil spec 697-554 and Corning C97-55
3 LSF: i don't know either.