The photochemical bleaching of dye by light is a long-standing problem for the textile and graphics industries. However, the effects of photochemical bleaching can also be employed usefully to alter the index of refraction of a material to fabricate an optical waveguide in polymeric materials. The advantages of this method include ease of fabrication and the ability to precisely tailor the index of refraction [1]. Details on polymeric waveguides fabricated by photobleaching and on waveguide devices incorporating photobleached waveguides can be found, for instance, in [2] [3].