Linear Amplification of Optical Signal in Coupled Photonic Crystal Waveguides

Abstract

We introduce a weakly coupled photonic crystal waveguide as a promising and\nrealistic model for all-optical amplification. A symmetric pillar type coupled\nphotonic crystal waveguide consisting of dielectric rods periodically\ndistributed in a free space is proposed as all-optical amplifier. Using the\nunique features of the photonic crystals to control and guide the light, we\nhave properly chosen the frequency at which only one mode (odd mode) becomes\nthe propagating mode in the coupled photonic crystal waveguide, whereas another\nmode (even mode) is completely reflected from the guiding structure. Under this\ncondition, the all-optical amplification is fully realized. The amplification\ncoefficient for the continuous signal and the Gaussian pulse is calculated.\n