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WorksheetsUnit 1 : Light sources and optical fiber
Total questions: 10
Worksheet time: 6mins
What is a light source?
converts ac to dc
converts electrical signal to light
converts light into electrical signal
converts visible light to invisible light
Which of the following light source works on the principle of spontaneous emission?
LED
PIN
APD
LASER
Stimulated emission takes place in which of the following device?
APD
LASER
LED
PIN
Select the wavelengths used for optical transmission windows
1310 nm
850 nm
1550 nm
600 nm
Which of the following is true for an LED? (multiple answers)
linear output
low cost
broad spectral width
complex drive circuit
For a single mode optical fiber which of the options are correct?
small core size
large bandwidth
only one mode
all of the above
For a single mode fiber the V-number must be
(a)
which of the following is zero dispersion window?
850 nm
1310 nm
1550 nm
1600 nm
What is true for a LASER?
less costly
simple circuitry
coherent source
works on spontaneous emission
what is the wavelength of Red light?
400 nm
550 nm
660 nm
700 nm
