Patent ID: 6031945
Filing Date: 2000-02-29
Classification: G02B,G02F

Abstract:
A method for fabricating an optically active device for transmitting at least one input light beam as at least one output light beam, the method comprising the steps of:forming a lower clad layer using linear polymer on a substrate capable of transmitting ultraviolet light;forming a first metal layer through which the ultraviolet light does not transmit at a region on the lower clad layer, other than the regions where the optical waveguide is to be disposed;forming a second metal layer made of a material different from that of the first metal layer and incapable of transmitting the ultraviolet light on the first metal layer disposed on and adjacent to both ends of the linear core region;forming a non-linear polymer layer on the waveguide region, first metal layer and second metal layer;curing the non-linear polymer at only a non-linear core region by exposing the ultraviolet light to the substrate from its bottom side and removing any uncured non-linear polymer formed on the first and second metal layers;forming a third metal layer on the non-linear polymer remaining on the non-linear core region;removing the second metal layer;forming a linear polymer layer on the first metal layer and said non-linear polymer;curing the linear polymer at only a linear core region by exposing the ultraviolet light to the substrate from its bottom side and removing any uncured linear polymer;removing the first metal layer disposed on the lower clad layer and the third metal layer; andforming an upper clad layer on the lower clad layer and waveguide core region.