Linearization of electro-optic modulators by a cascade coupling of phase-modulating electrodes

Theoretical predictions and experimental results on two slightly different kinds of linearized optical modulators for use in wideband analog transmission is presented. Both modulators are based on a cascade coupling of phase-modulated parallel wave guide sections. In both cases, 95 dB suppression of the 3rd harmonic of a single test tone with an optical modulation depth of 20% is theoretically obtained. Some initial experimental results are presented for both modulators.