The closed-form propagation equation of flattened Gaussian beams passing through a paraxial optical ABCD system, in which the linear gain and absorption media are included, is derived, and its general applicable advantage is illustrated with numerical examples.
© 2000 Optical Society of America
Baida Lü and Shirong Luo, "General propagation equation of flattened Gaussian beams," J. Opt. Soc. Am. A 17, 2001-2004 (2000)