MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Optical Communications knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When the input and output power in an optical fiber is 120 W & 3 W respectively and the length of the fiber is 8 km. What is the signal attenuation per km for the fiber? |
| A. | 3dB/km |
| B. | 2dB/km |
| C. | 1dB/km |
| D. | 4dB/km |
| Answer» C. 1dB/km | |
| 2. |
A decibel may be defined as the ratio of input and output optical power for a particular optical wavelength. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
A device that reduces the intensity of light in optical fiber communications is ___________ |
| A. | compressor |
| B. | Optical attenuator |
| C. | Barometer |
| D. | Reducer |
| Answer» C. Barometer | |
| 4. |
If the input power 100 W is launched into 6 km of fiber, the mean optical power at the fiber output is 2 W. What is the overall signal attenuation through the fiber assuming there are no connectors or splices? |
| A. | 15.23dB |
| B. | 16.98dB |
| C. | 17.12dB |
| D. | 16.62dB |
| Answer» C. 17.12dB | |
| 5. |
The optical fiber incurs a loss in signal power as light travels down the fiber which is called as ___________ |
| A. | Scattering |
| B. | Attenuation |
| C. | Absorption |
| D. | Refraction |
| Answer» C. Absorption | |
| 6. |
Which is the unit of measurement of attenuation in optical fibers? |
| A. | km |
| B. | dB |
| C. | dB/km |
| D. | Coulomb s |
| Answer» D. Coulomb s | |
| 7. |
The periodic arrangement of cladding air holes in photonic band gap fibers provides for the formation of a photonic band gap in the ___________ |
| A. | H-plane of fiber |
| B. | E-plane of fiber |
| C. | E-H-plane of fiber |
| D. | Transverse plane of fiber |
| Answer» E. | |
| 8. |
The high index contrast enables the PCF core to be reduced from around 8 min conventional fiber to ___________ |
| A. | Less than 1 m |
| B. | More than 5 m |
| C. | More than 3 m |
| D. | More than 2 m |
| Answer» B. More than 5 m | |
| 9. |
Losses in photonic crystal fibers are reduced to a level of ___________ |
| A. | 0.1dB/km |
| B. | 0.2dB/km |
| C. | 0.3dB/km |
| D. | 0.4dB/km |
| Answer» D. 0.4dB/km | |
| 10. |
Conventional optical fibers has more transmission losses than photonic crystal fibers. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
Photonic crystal fibers also called as ___________ |
| A. | Conventional fibers |
| B. | Dotted fibers |
| C. | Stripped fibers |
| D. | Holey fibers |
| Answer» E. | |