Germanium Photodiodes are semiconductor detectors that convert near-infrared light into electrical current using germanium as the absorption material. They are commonly used for optical power monitoring and signal detection at telecom wavelengths such as 1310 nm and 1550 nm, as well as other near-IR sources. Key performance factors include responsivity, dark current, capacitance, bandwidth, and package configuration. GPD Optoelectronics manufactures germanium photodiodes for infrared sensing and communications.
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