A method of making Y couplers and grating optical waveguides of the present invention comprises exposing the polydiacetylene to an e-beam or a similar exposing means causing a change in the index of refraction of the polydiacetylene. In the case of e-beam exposure, the optical component patent is produced...http://www.google.com/patents/US4808285?utm_source=gb-gplus-sharePatent US4808285 - Method of making micro-optical components on polydiacetylene optical devices
