(57) and a cladding layer [Abstract] Planar optical device, formed substrate (12) on, is formed adjacent to the core waveguide core and a series (14) and (16). Waveguide core series and one (14) cladding layer (16) includes an extended matrix containing silicon and oxygen atoms, part of which is bonded directly to a non-substituted hydrocarbon substituents or atoms of which at least at least silicon is an inorganic-organic hybrid materials have. According to another embodiment of the present invention, to prepare a core composition precursor materials the method of forming the core of the series; then partially hydrolyzed to charge said material, to polymerize; oxygen atoms and silicon atoms Each includes an extended matrix containing, to form a waveguide sequence under conditions effective to form an inorganic-organic hybrid materials is coupled directly to the non-substituted hydrocarbon substituents or atoms at least part of the silicon I comprising the steps.
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