Which device generates the output voltage used to detect light in an optical receiver?

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Prepare for the OCC SACA Sensor Logic Systems 1 (C-205) Exam. Study with detailed questions and insightful explanations. Get ready for your certification!

Multiple Choice

Which device generates the output voltage used to detect light in an optical receiver?

Explanation:
The device that detects light in an optical receiver is the photodiode. When light from the fiber shines on it, the photodiode generates a current proportional to the light intensity. This current is typically very small, so the receiver uses amplification (often a transimpedance amplifier) to convert that photocurrent into a usable output voltage. That voltage is the signal the rest of the receiver uses to determine the data. The other parts listed don’t detect light: a transmitter or LED emits light, and a resistor is not a light detector.

The device that detects light in an optical receiver is the photodiode. When light from the fiber shines on it, the photodiode generates a current proportional to the light intensity. This current is typically very small, so the receiver uses amplification (often a transimpedance amplifier) to convert that photocurrent into a usable output voltage. That voltage is the signal the rest of the receiver uses to determine the data. The other parts listed don’t detect light: a transmitter or LED emits light, and a resistor is not a light detector.

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