title: Approximate analytic solutions for the optical pumping of fluorescent dyes.
abstract: A general technique for solving a system of rate equations describing the interaction of an electromagnetic field and a molecular system is presented. The method is used to obtain approximate time-dependent solutions for the upper-level populations of fluorescent dyes in the presence of a pump field.
authors.forename: N M
authors.initials: NM
authors.lastname: Lawandy