VARNISH CONTAINING PHOTODOPING MATERIAL AND OPTICAL WAVEGUIDE AMPLIFIER USING THE SAME

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PROBLEM TO BE SOLVED : To provide a varnish containing a fluorinated polyimide precursor in which a rare earth metal is added at a high concentration, and to provide an optical waveguide amplifier using it. SOLUTION : This varnish comprises a photodoping material formulated by mixing a composite, obtained by reacting the rare earth metal salt with a metal alkoxide, and a carboxylic acid compound in an organic solvent, as well as the fluorinated polyimide precursor. COPYRIGHT : (C)2009, JPO&INPIT