The imaging properties of Gaussian beams of light passing through a nonlinear graded-index rod are studied for the first time to our knowledge. The beam-width parameter, the distance of the focal plane, and the linear magnification in terms of the beam power, diffraction, and the rod dimensions are derived by using the variational approach and the ABCD law of Gaussian beam propagation. A comparison of these results with those derived from the ray equation and the linear case shows that the effects of the beam power on the imaging characteristics are significant.
© 1992 Optical Society of America
Original Manuscript: July 23, 1991
Revised Manuscript: January 24, 1992
Published: December 1, 1992
Zhihao Chen and Heng Lai, "Imaging properties of Gaussian beams with a nonlinear graded-index rod lens," J. Opt. Soc. Am. B 9, 2248-2251 (1992)