Polymer waveguide incorporated with europium-aluminum polymer composite for compact and efficient amplification devices

Abstract

Polymer waveguides incorporated with europium (Eu)-aluminum (Al) polymer composite are fabricated by applying the Mosquito method. The optical amplification gains of the fabricated waveguides with different lengths are measured under a coaxial pumping condition. It is found that the pumping efficiency tends to decrease with increasing the waveguide length. In order to improve the efficiency, the core diameter of the fiber coupler used in a coaxial pumping is investigated.