Definition of photodiode in English:



  • A semiconductor diode which, when exposed to light, generates a potential difference or changes its electrical resistance.

    • ‘The receiver uses a photocell or photodiode to detect the light.’
    • ‘Semiconductor photodiodes offer high-sensitivity and low-noise operation, enabling them to detect very low light levels; attenuating filters must be used for high powers.’
    • ‘The image source may be replaced by an eyepiece, a CCD camera, a photodiode, a quad cell, or a fiber port.’
    • ‘The outputs of the sphere photodiodes and also the photodiodes monitoring the source laser power were sent to an oscilloscope.’
    • ‘The sensor consists of a silicon photodiode, with a pre-amp that gives enough signal for the voice channel of a small radio transmitter.’