OPTICAL AMPLIFIER AND ITS MANUFACTURING METHOD

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PROBLEM TO BE SOLVED : To provide a small and efficient optical amplifier having a PLZT optical waveguide layer to which rare earth elements are added, and a method of manufacturing the optical amplifier. SOLUTION : The optical amplifier is an optical waveguide layer (for example, channel-like optical waveguide layer 16) constituted by including Pb1-xLax(ZryTi1-y)1-x/4O3 (PLZT : 0

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