MCQOPTIONS
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MCQOPTIONS
This section includes 7 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 two components are equally excited at the fiber input, then for polarization maintaining fibers g should be around ___________ |
| A. | 1.5ns/km |
| B. | 1 ns/km |
| C. | 1.2ns/km |
| D. | 2ns/km |
| Answer» C. 1.2ns/km | |
| 2. |
A polarization maintaining fiber operates at a wavelength 1.2 m and have a modal birefringence of 1.8*10-3. Calculate the period of perturbation. |
| A. | 0.7 seconds |
| B. | 0.6 seconds |
| C. | 0.23 seconds |
| D. | 0.5 seconds |
| Answer» C. 0.23 seconds | |
| 3. |
Beat length of a single mode optical fiber is 0.6cm. Calculate the difference between propagation constants for the orthogonal modes. |
| A. | 69.8 |
| B. | 99.86 |
| C. | 73.2 |
| D. | 104.66 |
| Answer» E. | |
| 4. |
The beat length in a single mode optical fiber is 8 cm when light from a laser with a peak wavelength 0.6 m is launched into it. Estimate the modal birefringence. |
| A. | 1 10<sup>-5</sup> |
| B. | 3.5 10<sup>-5</sup> |
| C. | 2 10<sup>-5</sup> |
| D. | 4 10<sup>-5</sup> |
| Answer» B. 3.5 10<sup>-5</sup> | |
| 5. |
An optical fiber behaves as a birefringence medium due to differences in ___________ |
| A. | Effective R-I and core geometry |
| B. | Core-cladding symmetry |
| C. | Transmission/propagation time of waves |
| D. | Refractive indices of glass and silica |
| Answer» B. Core-cladding symmetry | |
| 6. |
The optical source used for detection of optical signal is ____________ |
| A. | IR sensors |
| B. | Photodiodes |
| C. | Zener diodes |
| D. | Transistors |
| Answer» C. Zener diodes | |
| 7. |
For many applications that involve optical fiber transmission, an intensity modulation optical source is not required. |
| A. | True |
| B. | False |
| Answer» C. | |