Patent ID: 6539133
Filing Date: 2003-03-25
Classification: B41J,G02B,G02F

Abstract:
A method of aligning a waveguide with respect to external optics comprising:providing at least one electrically controlled waveguide formed on at least one substrate, each of said at least one substrate comprising layers of materials arranged to confine an electrical field in a relatively small thickness, wherein said electrical field controls the effective index of refraction of said at least one electrically controlled waveguide, said at least one electrically controlled waveguide receiving light at an edge of said at least one substrate and emitting light, wherein said layers include: an N-doped gallium arsenide substrate; an N-doped aluminum gallium arsenide layer; an N-doped gallium arsenide layer; a P-doped gallium arsenide layer; a P-doped aluminum gallium arsenide layer; and a P-doped gallium arsenide layer; and operating said at least one electrically controlled waveguide as a light source during alignment thereof with respect to external optics.