Question
The basic components of an optocoupler are _____.
The correct answer is
LED and phototransistor
Optocoupler Essential Components
An optocoupler, also known as an optoisolator, is an electronic component designed for signal transfer between two isolated circuits using light.
The basic structure comprises:
- A light-emitting component, typically a Light Emitting Diode (LED), which converts the input electrical signal into light pulses.
- A light-detecting component, most commonly a phototransistor, which senses the light from the LED and converts it back into an output electrical signal.
These components are sealed within a single package, providing electrical isolation between the input and output sides.
Thus, the essential building blocks are an LED and a phototransistor.
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Important Questions from Optical Devices
Which computer application scans texts and converts into readable form in computer?
In optical communication using silica optical fiber, 1 nm spectral width at 1300 nm corresponds to a bandwidth of (assume refractive index of silica optical fiber = 1.5)
An LCD requires a power of __________.
- The slope efficiency of a laser diode is 0.5 W/A, and the output optical power at a current of 100 mA is 30 mW. Assuming piece-wise linear characteristics of the laser diode, the threshold current of the laser is ________ mA.
- A DVD uses the _____ method to store and read data.
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