PHOTODIODE CHARACTERISTICS

1 UDT Sensors Inc. Phone: 310-978-0516 Fax: 310-644-1727 http:\\ CHARACTERISTICSS ilicon photodiodes are semiconductor devices responsive to high-energy particles and photons. Photodiodes operate by absorption ofphotons or charged particles and generate a flow of current in an ex-ternal circuit, proportional to the incident power. Photodiodes can beused to detect the presence or absence of minute quantities of lightand can be calibrated for extremely accurate measurements from in-tensities below 1 pW/cm2 to intensities above 100 mW/cm2. Siliconphotodiodes are utilized in such diverse applications as spectroscopy,photography, analytical instrumentation, optical position sensors, beamalignment, surface characterization, laser range finders, optical com-munications, and medical imaging DIFFUSED SILICON PHOTODIODECONSTRUCTIONP lanar diffused silicon photodiodes are simply P-N junction diodes.

1 UDT Sensors Inc. Phone: 310-978-0516 Fax: 310-644-1727 http:\\www.udt.com PHOTODIODE CHARACTERISTICS Silicon photodiodes are semiconductor devices responsive to high-energy particles and photons. Photodiodes operate by absorption of photons or charged particles and generate a flow of current in an ex-

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