Robert E. Bridges
The following papers are viewable in PDF format:
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"Multidimensional coupling owing to optical nonlinearities. I. General formulation"
Robert E. Bridges, Robert W. Boyd, Govind P. Agrawal
JOSA B, Vol. 13 Issue 3 Page 553 (1996)
"Z-scan measurement technique for non-Gaussian beams and arbitrary sample thicknesses"
Robert E. Bridges, George L. Fischer, Robert W. Boyd
Optics Letters, Vol. 20 Issue 17 Page 1821 (1995)