30-ps impulse response monolithically waveguide coupled photo-detector for high-speed performance monitoring applications

Optical power performance functions monitoring can be demonstrated using a waveguide coupled photo-detector using a reflector and a metal coplanar waveguide. A full-width half-maximum temporal response of 30 ps is illustrated with minimal ringing from a monolithic integrated photo-detector, suitable for 10-Gb/s digital communication applications. The high-speed response of the pin photo-detector is limited by an average saturation drift velocity of 3.5 × 10⁶ cm/s and the impurity concentration of the absorbing In_0.53Ga_0.47As layer of 1.9 × 10¹⁷ cm^− 3 will be demonstrated.