Avalanche photodiodeworking principle

Refraction of light rays by a converging lens. Normal line. Focal point. Refraction of light rays by a diverging lens.

Avalanche Photodiodedatasheet

Si APDs are used when light signals are too high for photomultiplier tubes and too low for conventional photodiodes. Si APDs are often used in high-speed applications since the excess noise from the avalanche process is still lower than the noise that would be generated in connecting an external amplifier to a conventional photodiode operated at high frequencies. Typical applications include low-light level measurement, spectroscopy, range finding and spatial/fiber optic communication. Both our short-wavelength type and near infrared detection types are hermetically sealed in a metal package with a clear glass window.

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Avalanche photodiodevsphotodiode

Avalanche photodiodePDF

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Quick Reference. A ray of light that falls on a reflecting or refracting surface close to and almost parallel to the axis. It is for such rays that simple lens ...

Avalanche photodiodestructure

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Photosensitivity (S) and Quantum Efficiency QE): For the NIR and UV/VIS Si APDs, λ=800nm and λ=620nm, respectively. QE and S are given for M equal to 1.Gain (M) is given at λ=800nm and λ=650nm for the NIR and UV/VIS Si APDs respectively.Terminal capacitance is measured at the gain specified.

Avalanche Photodiodeprice

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Hamamatsu Avalanche Photodiodes (APDs) are silicon photodiodes with an internal gain mechanism. As with a conventional photodiode, absorption of incident photons creates electron-hole pairs. A high reverse bias voltage creates a strong internal electric field, which accelerates the electrons through the silicon crystal lattice and produces secondary electrons by impact ionization. The resulting electron avalanche can produce gain factors up to several hundred.

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