OPTICAL, INTEGRATED WAVEGUIDE COMPONENT

摘要

A single crystal body (20) e.g. of lithium niobate has a flat upper surface (22) provided with waveguides (23) and flat parallel end surfaces (21). The crystal has cleavage planes, and optical axis in the crystal can be defined with a given inclination to these planes. The end surfaces (21) of the body (20) consist of cleavage planes for obtaining small losses when coupling light into the waveguides (23). The upper surface (22) is oriented such that in relation to the crystalline structure, the optical axis of the crystal is in a plane (24) defined by the normals (n2, n1) of the upper surfaces and the end surfaces. The angles between the upper surface (22) and end surfaces (21) deviates from a right angle byan angle( beta ) of at most 10 degrees.