A Double Pulse Generator by 2D Photonic Crystal Waveguide System

We developed double pulse generators based on two-dimensional slab photonic crystal. The device structures are asymmetric Mach-Zehnder interferometer. In the device, there are two Y shape branches. By utilizing modified Y branches, the loop path in the interferometer is suppressed, and it is shown that the devices are worked as double pulse generators with picoseconds order delay time by measurement of transmission spectra.