| Er-doped waveguide amplifier (EDWA) is another optical amplifier following the semiconductor optical amplifier (SOA) and Er-doped fiber amplifier (EDFA). It has the advantage of high gain with short device, waveguide array and low cost. In this paper, the normalize overlap factor between pump and signal light intensity profiles in the waveguide (Γ) is introduced, and be taken into account in the theoretic model of the Er-doped glass waveguide amplifier (EDWA). The two dimensional refractive index profiles was obtained by solving the two-dimension diffusion equation, and the guide modes of both pump and signal light in the channel waveguide is obtained using the semi vector finite difference method (SV-FDM). The normalize value ofΓwith different fabrication parameters is calculated, and its effect on the gain of EDWA has been investigated. The results shows the gain of EDWA can be improved by optimizing theΓ. |
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