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APD Modules

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APD Modules

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The APD (avalanche photodiode) is a highspeed, high-sensitivity photodiode that internally multiplies photocurrent when reverse voltage is applied. The internal multiplication function referred to as avalanche multiplication features high photosensitivity that enables measurement of lowlevel light signals. The APD’s ability to multiply signals reduces the effect of noise and achieves higher S/N than the PIN photodiode. The APD also has excellent linearity. APD modules contain a near infrared or short wavelength type APD.

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