MCQOPTIONS
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MCQOPTIONS
This section includes 24 Mcqs, each offering curated multiple-choice questions to sharpen your Optical Communication knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
An SOA has noise power spectral density of 1.18mW, spontaneous emission factor of 4, optical bandwidth of 1.5 THz. Determine mode number. |
| A. | 1.53 × 1028 |
| B. | 6.14 × 1012 |
| C. | 1.78 × 1016 |
| D. | 4.12 × 10-3 |
| Answer» B. 6.14 × 1012 | |
| 2. |
An SOA has mode number of 2.6, spontaneous emission factor of 4, optical bandwidth of 1 THz. Determine noise power spectral density. |
| A. | 1.33×10-3 |
| B. | 5.13×1012 |
| C. | 3.29×10-6 |
| D. | 0.33×10-9 |
| Answer» B. 5.13×1012 | |
| 3. |
An SOA has length of 35.43×10-3m, at 30 dB gain. Determine net gain coefficient. |
| A. | 5.124×10-3 |
| B. | 1.12×10-4 |
| C. | 5.125×10-3 |
| D. | 2.15×10-5 |
| Answer» D. 2.15×10-5 | |
| 4. |
An SOA has net gain coefficient of 300, at a gain of 30dB. Determine length of SOA. |
| A. | 0.32 m |
| B. | 0.023 m |
| C. | 0.245 m |
| D. | 0.563 m |
| Answer» C. 0.245 m | |
| 5. |
An uncoated FPA has peak gain wavelength 1.8μm, mode spacing of 0.8nm, and long active region of 300 v. Determine RI of active medium. |
| A. | 4.25×106 |
| B. | 3.75×107 |
| C. | 3.95×107 |
| D. | 4.25×109 |
| Answer» C. 3.95×107 | |
| 6. |
______________ are operated at current beyond normal lasing threshold current, practically. |
| A. | Semiconductor optical amplifier |
| B. | Erbium-doped fiber amplifier |
| C. | Raman fiber amplifier |
| D. | Brillouin fiber amplifier |
| Answer» B. Erbium-doped fiber amplifier | |
| 7. |
Mostly ____________ are used in nonlinear applications. |
| A. | Semiconductor optical amplifier |
| B. | Erbium-doped fiber amplifier |
| C. | Raman fiber amplifier |
| D. | FPAs |
| Answer» E. | |
| 8. |
For used in single-mode fiber __________ are used preferably. |
| A. | Semiconductor optical amplifier |
| B. | Erbium-doped fiber amplifier |
| C. | Raman fiber amplifier |
| D. | Brillouin fiber amplifier |
| Answer» B. Erbium-doped fiber amplifier | |
| 9. |
________________ cannot be used for wideband amplification. |
| A. | Semiconductor optical amplifier |
| B. | Erbium-doped fiber amplifier |
| C. | Raman fiber amplifier |
| D. | Brillouin fiber amplifier |
| Answer» E. | |
| 10. |
The more advantages optical amplifier is ____________ |
| A. | Fiber amplifier |
| B. | Semiconductor amplifier |
| C. | Repeaters |
| D. | Mode hooping amplifier |
| Answer» C. Repeaters | |
| 11. |
DETERMINE_THE_PEAK_GAIN_WAVELENGTH_OF_UNCOATED_FPA_HAVING_MODE_SPACING_OF_2NM,AND_250‚ÂÀ√≠¬¨‚À´MLONG_ACTIVE_REGION_AND_R.I_OF_3.78.?$# |
| A. | 2.25√ó10<sup>-4 </sup> |
| B. | 4.53√ó10<sup>-8</sup> |
| C. | 1.94√ó10<sup>-6</sup> |
| D. | 4.25√ó10<sup>9 </sup> |
| Answer» D. 4.25‚Äö√†√∂‚àö‚â•10<sup>9 </sup> | |
| 12. |
AN_UNCOATED_FPA_HAS_PEAK_GAIN_WAVELENGTH_1.8‚ÂÀ√≠¬¨‚À´M,_MODE_SPACING_OF_0.8NM,_AND_LONG_ACTIVE_REGION_OF_300_V._DETERMINE_RI_OF_ACTIVE_MEDIUM?$# |
| A. | 4.25√ó10<sup>6</sup> |
| B. | 3.75√ó10<sup>7</sup> |
| C. | 3.95√ó10<sup>7</sup> |
| D. | 4.25√ó10<sup>9</sup> |
| Answer» C. 3.95‚Äö√†√∂‚àö‚â•10<sup>7</sup> | |
| 13. |
An SOA has length of 35.43√ó10-3m, at 30 dB gain. Determine net gain coefficient.$# |
| A. | 5.124√ó10<sup>-3</sup> |
| B. | 1.12√ó10<sup>-4</sup> |
| C. | 5.125√ó10<sup>-3</sup> |
| D. | 2.15√ó10<sup>-5</sup> |
| Answer» D. 2.15‚Äö√†√∂‚àö‚â•10<sup>-5</sup> | |
| 14. |
An SOA has net gain coefficient of 300, at a gain of 30dB. Determine length of SOA.$ |
| A. | 0.32 m |
| B. | 0.023 m |
| C. | 0.245 m |
| D. | 0.563 m |
| Answer» C. 0.245 m | |
| 15. |
An SOA has noise power spectral density of 1.18mW, spontaneous emission factor of 4, optical bandwidth of 1.5 THz. Determine mode number |
| A. | 1.53 √ó10<sup>28</sup> |
| B. | 6.14 √ó10<sup>12</sup> |
| C. | 1.78 √ó10<sup>16</sup> |
| D. | 4.12 √ó10<sup>-3</sup> |
| Answer» B. 6.14 ‚Äö√†√∂‚àö‚â•10<sup>12</sup> | |
| 16. |
An SOA has mode number of 2.6, spontaneous emission factor of 4, optical bandwidth of 1 THz. Determine noise power spectral density |
| A. | 1.33√ó10<sup>-3</sup> |
| B. | 5.13√ó10<sup>12</sup> |
| C. | 3.29√ó10<sup>-6</sup> |
| D. | 0.33√ó10<sup>-9</sup> |
| Answer» B. 5.13‚Äö√†√∂‚àö‚â•10<sup>12</sup> | |
| 17. |
______________ are operated at current beyond normal lasing threshold current, practicall? |
| A. | Semiconductor optical amplifier |
| B. | Erbium-doped fiber amplifier |
| C. | Raman fiber amplifier |
| D. | Brillouin fiber amplifier |
| Answer» B. Erbium-doped fiber amplifier | |
| 18. |
_______________ is superior as compared to _________________ |
| A. | TWA, FPA |
| B. | FPA, TWA |
| C. | EDFA, FPA |
| D. | FPA, EDFA |
| Answer» B. FPA, TWA | |
| 19. |
Mostly ____________ are used in nonlinear applications |
| A. | Semiconductor optical amplifier |
| B. | Erbium-doped fiber amplifier |
| C. | Raman fiber amplifier |
| D. | FPAs |
| Answer» E. | |
| 20. |
For used in single-mode fiber, ___________ are used preferably |
| A. | Semiconductor optical amplifier |
| B. | Erbium-doped fiber amplifier |
| C. | Raman fiber amplifier |
| D. | Brillouin fiber amplifier |
| Answer» B. Erbium-doped fiber amplifier | |
| 21. |
____________ is used preferably for channel selection in a WDM system. |
| A. | Semiconductor optical amplifier |
| B. | Erbium-doped fiber amplifier |
| C. | Raman fiber amplifier |
| D. | Brillouin fiber amplifier |
| Answer» E. | |
| 22. |
________________ cannot be used for wideband amplification |
| A. | Semiconductor optical amplifier |
| B. | Erbium-doped fiber amplifier |
| C. | Raman fiber amplifier |
| D. | Brillouin fiber amplifier |
| Answer» E. | |
| 23. |
The more advantages optical amplifier is |
| A. | Fiber amplifier |
| B. | Semiconductor amplifier |
| C. | Repeaters |
| D. | Mode hooping amplifier |
| Answer» C. Repeaters | |
| 24. |
For linear as well as in nonlinear mode _______________ are most important network elements. |
| A. | Optical amplifier |
| B. | Optical detector |
| C. | A/D converter |
| D. | D/A converters |
| Answer» B. Optical detector | |