Optimal design of a low-loss 2-bit electrooptic analog-to-digital converter

Abstract:

The structure of the optical waveguide of 2-bit electrooptic A/D converter with proton-exchange micro prisms is optimized by the finite-difference beam propagation method (FD-BPM). The electrode parameters of the converter are optimized by conformal mapping. The optimal parameters are a halfwave voltage ofV _π =4.5V and a bandwidth of Δf=1.4 GHz. A normalized transmitted power of 69.75% is obtained by FD-BMP and the output waveguide gap is 300 μm.