Improved Mach Zehnder Optical Modulators with Modified Ridge Structure

Mach Zehnder type optical modulators with modified ridge structure on a coplanar waveguide traveling wave electrode are investigated by the use of finite element method and BPM CAD waveguide software. The two ends of conventional ridge structure added taped ridge structures is considered, the transmission loss is obviously reduced. It is shown that the device increased modified ridge structure can efficiently reduce the transmission loss and the extinction ratio at the same output waveguide. In other words, the optical properties of Mach Zehnder type optical modulator with modified ridge structure on a coplanar waveguide traveling-wave electrode are obviously enhanced