GCS offer its own brand of high performance and high speed Active Optical Components (AOC) PIN photodetectors and Photodetector Arrays, manufactured from both GaAs and InP. Both planar and mesa photodetectors are available for applications up to 800 Gb/s with low dark current, high responsivity, and high reliability. Applications include datacom, telecom, Lightpeak, Thunderbolt, Parallel Optical Interconnects (POI), 3D Sensing and Lidar applications.