need help for SM fiber simulation

hai all,
my name Krisna Arizona, im from indonesia...

my final task for my bachelor program is about electrical field distribution simulation in SM fiber....

this simulation for WLAN over fiber system and using FDTD method and C++ language... then if anyone know anything about this topic please reply this thread or sent email at arizona_161@yahoo.com

it will be help full if you have the C++ source code for electrical field distribution in SM fiber..

thanks for the attention and cooperation.