Plastic optical waveguide and optical switch using same

摘要

A plastic optical waveguide with a low loss property, a low birefringence and a high temperature endurance constructed with a polyimide obtained from an acid dianhydride based component and a diamine based component, wherein at least one of a core layer and a cladding layer of the optical waveguide is made of an acid dianhydride based component including an alicyclic acid dianhydride or an aliphatic acid dianhydride, the plastic optical waveguide having an optical loss in a 1.3 mu m band of 0.5 dB/cm or less, and a refractive index of the core layer being larger than that of the cladding layer.