SOI Based Broadband <i>LiNbO</i> ₃ Interferometer Using Slot Waveguide Phase Modulator

ABSTRACT An electro‐optic modulator design with optimized structural dimensions is proposed to develop a broadband interferometric phase modulator with filled slot waveguide as one arm. Analysis of the transmittance, net phase change, interference, and characterization of the device for optical modulation speed and modulation bandwidth is performed. The proposed design has a total footprint area of 342.565 in which the footprint area of the active region is 2.302 . It works in the operating spectrum of 1280 to 1625 nm and covers the entire telecom optical wavelength band (O,E,S,C, and L‐band). It also covers the modulation speed of entire mm wave band, which is 30 to 300 GHz. This capability of high modulation speed makes it a potential modulator for 5th, 6th, and next upcoming generation network architecture.