MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 14 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. |
Stimulated Raman scattering may have an optical power threshold of may be three orders of magnitude ___________ |
| A. | Lower than Brillouin threshold |
| B. | Higher than Brillouin threshold |
| C. | Same as Brillouin threshold |
| D. | Higher than Rayleigh threshold |
| Answer» C. Same as Brillouin threshold | |
| 2. |
Stimulated Raman scattering occur in ___________ |
| A. | Forward direction |
| B. | Backward direction |
| C. | Upward direction |
| D. | Forward and backward direction |
| Answer» E. | |
| 3. |
High frequency optical phonon is generated in stimulated Raman scattering. |
| A. | False |
| B. | True |
| Answer» C. | |
| 4. |
Stimulated Brillouin scattering is mainly a ___________ |
| A. | Forward process |
| B. | Backward process |
| C. | Upward process |
| D. | Downward process |
| Answer» C. Upward process | |
| 5. |
0.4 dB/km, 1.4 m, 6 m, 550MHz. Find threshold optical power for stimulated Raman scattering. |
| A. | 1.98 W |
| B. | 1.20 W |
| C. | 1.18 W |
| D. | 0.96 W |
| Answer» D. 0.96 W | |
| 6. |
A single-mode optical fiber has an attenuation of 0.3dB/km when operating at wavelength of 1.1 m. The fiber core diameter is 4 m and bandwidth is 500 MHz. Find threshold optical power for stimulated Brillouin scattering. |
| A. | 11.20 mw |
| B. | 12.77 mw |
| C. | 13.08 mw |
| D. | 12.12 mw |
| Answer» C. 13.08 mw | |
| 7. |
The phonon is a quantum of an elastic wave in a crystal lattice. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Raman and Brillouin scattering are usually observed at ___________ |
| A. | Low optical power densities |
| B. | Medium optical power densities |
| C. | High optical power densities |
| D. | Threshold power densities |
| Answer» D. Threshold power densities | |
| 9. |
The in-homogeneities in Mie scattering can be reduced by coating of a fiber. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Mie scattering has in-homogeneities mainly in ___________ |
| A. | Forward direction |
| B. | Backward direction |
| C. | All direction |
| D. | Core-cladding interface |
| Answer» B. Backward direction | |
| 11. |
The scattering resulting from fiber imperfections like core-cladding RI differences, diameter fluctuations, strains, and bubbles is? |
| A. | Rayleigh scattering |
| B. | Mie scattering |
| C. | Stimulated Brillouin scattering |
| D. | Stimulated Raman scattering |
| Answer» C. Stimulated Brillouin scattering | |
| 12. |
Rayleigh scattering can be reduced by operating at smallest possible wavelengths. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
Dominant intrinsic loss mechanism in low absorption window between ultraviolet and infrared absorption tails is ___________ |
| A. | Mie scattering |
| B. | Rayleigh scattering |
| C. | Stimulated Raman scattering |
| D. | Stimulated Brillouin scattering |
| Answer» C. Stimulated Raman scattering | |
| 14. |
Rayleigh scattering and Mie scattering are the types of _____________ |
| A. | Linear scattering losses |
| B. | Non-linear scattering losses |
| C. | Fiber bends losses |
| D. | Splicing losses |
| Answer» B. Non-linear scattering losses | |