Bryan
yeah , Dr. Xu Wang is an expert in optical communications. With collaborations in Japan.
Dr Xu Wang’s web page ( http://home.eps.hw.ac.uk/~xw66/)
I know optiwave from him , and I am now using the optiFDTD 32 bits freeware to compare my results from the lab, so I am very happy 🙂 with the optical grating and diffraction pattern.
Regards
Luis