We develop a modal decomposition technique to describe wave propagation in dynamically varying waveguides such as those predicted to occur in photosensitive materials. In particular, we use this method to examine the self-writing of a channel waveguide in a slab of photosensitive glass. This method is up to two orders of magnitude faster than the numerical technique used previously, which is based on a conventional beam-propagation treatment. Hence it is a powerful tool for exploring the waveguides that form under a wide range of conditions.
© 1997 Optical Society of America
Original Manuscript: September 11, 1996
Revised Manuscript: March 17, 1997
Manuscript Accepted: March 17, 1997
Published: September 1, 1997
Tanya M. Monro, L. Poladian, and C. Martijn de Sterke, "Numerically efficient modal decomposition approach to self-writing processes," J. Opt. Soc. Am. A 14, 2180-2189 (1997)