An adaptive optical circuit with self-organizing link

摘要

We have realized optical self-organizing nodes in which nonlinear weighting is enabled by an opt-electronic hybrid circuit based on optical bistability attained simply by coupling a light emitting diode (LED) and a photo diode (PD), which have their own nonlinearity. By connecting each nodes, we have demonstrated a self-organizing link which can build up a signal propagation path autonomously by itself, applying our newly considered adaptive algorithm. This algorithm is based on the fact that the nonlinearity attained by our coupled LED and PD devices can be regarded to be available for a well established nonlinear function which appears in typical adaptive control theory. We have also demonstrated our first fabrication of self-organizing optical network system with seven adaptive nodes. In this scheme, we have intentionally generated a disconnection or a breaking of wire link between certain nodes in the network, and then we have also confirmed that the optimum alternative route can be made autonomously and the transmission recovered. As a consequence, the present optical self-organizing network system can be a step toward a new method for peer-to-peer communications in optical transmission network.