| 摘要 |
<p>In an optical planar waveguide device, the electrodes (12, 13, 14) which modulate a section of the waveguide (10), say to alter its refractive index, are coplanar with, and positioned on either side of, the waveguide section, which improves modulating efficiency. A similar configuration but with a thin layer (15) of insulating material (buffer layer) such as Si02 sandwitched between the surface of the etched dielectric and the electrodes reduces conductor losses and controls conductor/optical mode interaction and thermal and DC bias stabilization of the substrate material.</p> |
