Request InfoGPD Optoelectronics Corp.GPD Optoelectronics Corp. offers a variety of position sensing detectors for use in near-infrared beam alignment and tracking applications. Our quadrant photodiodes offer a convenient option for beam alignment and free space optics applications. GPD offers quadrant photodiodes made out of standard InGaAs and we are now happy to also offer low-capacitance InGaAs for improved speed in large-area detectors. Our Ge and InGaAs tetralateral position sensors offer a large detection field with no gaps or dead areas. 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