Traveling wave optical modulator with high dynamic range (≪130 dB) at large modulation frequencies

Abstract

In previous reports, we introduced a new lumped electrode-based optical modulator design with superior linearity (Spurious Free Dynamic Range, SFDR ∼ 133 dB at 1Hz bandwidth), and wider linearization bandwidth, when compared with previously reported Resonator-Assisted Mach Zehnder (RAMZ) modulators. Here, we extend the modulator design to a traveling wave (TW) electrode design that produces significant bandwidth improvement capability while maintaining the excellent SFDR (≪130 dB at 1Hz bandwidth). Furthermore, we utilize the combination of externally controlled parameters such as the RF split ratio and RF phase control, for maximum design flexibility and parameter optimization control.