Photodiodes are semiconductor devices that convert light into electrical current by generating charge carriers when photons are absorbed. Photodiodes are used in optical communications, sensing, imaging, and test instrumentation across wavelength ranges defined by the detector material, such as silicon for visible and InGaAs or germanium for infrared. Key parameters include responsivity, dark current, bandwidth, and linearity. GPD Optoelectronics manufactures photodiodes for infrared and position-sensing applications.
Read the blog post introducing our new What is a Photodiode? A Complete Guide covers operating modes, device types, key specifications, and material systems. Engineers new to detector selection will find a clear and practical starting point, along with links to relevant product pages and selection tools.