In this thesis, we apply multimode interference integrated optical power splitter to the optical time division multiplexer system. And we try to fabricate the 1x(2N+1) optical splitter by sol-gel method. The multimode interference optical splitter is designed according to self-image phenomenon. And we apply delay line technique to OTDM system to obtain the generation of combining pulse train. Finally we fabricate glass waveguide on quartz by using sol-gel method.