Fiber and Waveguide Amplifiers

Optical Communications

This set of Optical Communications Multiple Choice Questions & Answers (MCQs) focuses on “Fiber and Waveguide Amplifiers”.

1. The spectral dependence on gain is always constant.
a) True
b) False

2. ESA ________ the pumping efficiency of device.
a) Increases
b) Does not affects
c) Reduces
d) Has negligible effect on

3. Signal amplification is obtained in ____________
a) Erbium-doped fluoro-zir-carbonate fiber multimode
b) Rare-earth-doped fiber amplifiers
c) Raman fiber systems
d) Brillouin fiber amplifier

4. It is possible to construct a single rare-earth-doped fiber amplifier which provides amplification for all-bands.
a) True
b) False

5. _______________ is constructed using erbium-doped glass.
a) An erbium-based micro fiber amplifier
b) Rare-earth-doped fiber amplifiers
c) Raman fiber systems
d) Brillouin fiber amplifier

6. ____________ uses Er3+-doped erbium glass.
a) An erbium-based micro fiber amplifier
b) Rare-earth-doped fiber amplifiers
c) Raman fiber systems
d) Brillouin fiber amplifier

7. The most advantageous amplification is ____________
a) An erbium-based micro fiber amplifier
b) Rare-earth-doped fiber amplifiers
c) Raman fiber systems
d) Brillouin fiber amplifier

8. _________ is also known as lump Raman amplifiers.
a) An erbium-based micro fiber amplifier
b) Rare-earth-doped fiber amplifiers
c) Raman fiber systems
d) Discrete Raman amplifiers

9. _______________ extends the pump power into transmission line fiber.
a) An erbium-based micro fiber amplifier
b) Rare-earth-doped fiber amplifiers
c) Raman fiber systems
d) Distributed Raman amplification

10. _____________ are called hybrid Raman amplifier.
a) Lumped and distributed Raman Amplifiers
b) Rare-earth-doped fiber amplifiers
c) Raman fiber systems
d) Distributed Raman amplification

11. In ___________ the ASE contributes most of noise.
a) An erbium-based micro fiber amplifier
b) Rare-earth-doped fiber amplifiers
c) Raman fiber systems
d) Distributed Raman amplification

12. In _____________ Rayleigh scattering can be reduced.
a) An erbium-based micro fiber amplifier
b) Rare-earth-doped fiber amplifiers
c) Raman fiber systems
d) Distributed Raman amplification

13. Compute the fiber nonlinear coefficient of a parametric optical amplifier having parametric peak gain of 63.6 dB, signal power of 1.6W, length 520.
a) 2.78×10-2 W-1km-1
b) 9.61×10-3 W-1km-1
c) 3.25×10-3 W-1km-1
d) 5.61×10-4 W-1km-1

14. Compute signal power for parametric amplifier having length of 500, nonlinear gain coefficient 12.6×10-3 W-1km-1 and parametric peak gain of 63.9 dB.
a) 0.245 W
b) 0.012 W
c) 0.19 W
d) 0.342 W

15. Compute the gain of parametric amplifier having signal power of 1.6W, length of 500, non-linear coefficient of 10.19 * 10-3W-1km-1.
a) 34.890
b) 19.15
c) 18.22
d) 16.11

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