Patent ID: 8837875

Claim:
An optical path switch, comprising: an input optical path, two output optical paths and an optical path switching element, wherein the optical path switching element is adapted for selective routing light beams from the input optical path to one of the output optical paths, and comprises: a semiconductor substrate, an inter layer dielectric layer on the substrate, a cavity in the inter layer dielectric layer, wherein an end of the cavity is connected with the input optical path, the other end is partitioned into an upper cavity and a lower cavity by an isolating layer, the upper and lower cavities are respectively connected with the two output optical paths; and an elastic light guiding plate in the cavity, wherein the elastic light guiding plate comprises a reflecting material and comprises a fixed end connected with the isolating layer and a free end facing the input optical path and suspending in the cavity, wherein the free end can move between the top and bottom of the cavity under a force field exerted in the cavity.