PLANAR DIAPHRAGM AND METHOD OF MAKING PLANAR DIAPHRAGM Russian patent published in 1996 - IPC

FIELD: integral-optical devices. SUBSTANCE: film metal mask is applied onto surface of planar optical waveguide at diaphragm's window area. After that, optical material strip is applied over mask in perpendicular to waveguide onto the surface of the waveguide. Optical material has refractivity being higher than refractivity of waveguide layer. Masking layer provided passage of mode through waveguide across diaphragm's window under film mask. Light is withdrawn away from the waveguide at the area of direct contact of waveguide and applied material. EFFECT: improved efficiency. 2 cl, 1 dwg