Designs to mitigate nonlinearity in high power waveguide photodiode

High power photodiodes were proposed in prior works for conversion of broadband modulated optical signals to electrical signals for transmission at high frequencies. At moderate to high optical powers, the linearity of the photodiode becomes a main concern for achieving high linearity transmission in fiber link. In this invited talk the mode analysis for understanding the absorption profile of high power coupled waveguide photodiodes is presented. which also illuminated the design parameters pertinent for high saturation power and linear detection.