OPTICAL SWITCH

摘要

An optical switch is provided with: optical input/output ports in which three or more ports are arranged in a prescribed array direction; a spatial light modulator that comprises an incident light layer and a light reflection layer, and a spatial light modulation layer disposed between the incident light layer and the light reflection layer, and that spatially modulates light that strikes the incident light layer from one of the optical input/output ports, and outputs the light toward one of the other optical input/output ports; and a condenser lens that optically joins the optical input/output ports and the spatial light modulator. If coordinate axes are taken in the array direction of the optical input/output ports, and the position of the optical axis of the condenser lens is regarded as the origin of the coordinate axes, when the coordinates of a first port to which light in the optical input/output ports is inputted or which outputs the light, and a second port and third port which output or receive the light that is input or output by the first port are regarded as x0, x1 and x2 (where x1 and x2 > 0), respectively, x2 ? 2x1 + x0 holds true.