A low half-wave voltage of 1.57 V was obtained with a 2-cm-long birefringent polymer waveguide modulator at a wavelength of by use of a modulator design with a constant-bias electric field and a high- chromophore. The design allows the maximum achievable electro-optic coefficient of the material to be utilized. This electro-optic coefficient can be more than twice as high as the residue value that is used by conventional modulator designs, after fast partial relaxation following poling.
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