| 摘要 |
PURPOSE:To obtain a polysiloxane containing a specific recurring unit and a transition metal element such as titanium in the molecule, having low light- transmission loss and excellent heat-resistance and nonlinear optical characteristics and useful as parts for optical waveguide, etc. CONSTITUTION:This polysiloxane contains (A) a recurring unit of the formula [R1 is CnY2n+1 (Y is H, deuterium or halogen; (n) is <=5), (deuterated) phenyl or halogenated phenyl] and (B) either one of transition metal elements selected from titanium, chromium, manganese, iron and palladium in the molecule. The polysiloxane is preferably used as a part of the core 3 of an optical waveguide. |
