Disclosed are a material for an optical waveguide, which has high polymerizability and high solvent resistance, an optical waveguide made of the material, and a method for manufacturing the optical waveguide. In an embodiment, a lattice-matched insulator layer is formed on a semiconductor substrate, and a lattice-matched semiconductor layer is formed on the insulator layer to form a relatively thin, relatively uniform semiconductor on insulator apparatus. When the improved base unit is connected to the center rod, the improved base unit is movable into at least two configurations.