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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. |
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 10<sup>28</sup> |
B. | 6.14 10<sup>12</sup> |
C. | 1.78 10<sup>16</sup> |
D. | 4.12 10<sup>-3</sup> |
Answer» B. 6.14 10<sup>12</sup> | |
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<sup>-3</sup> |
B. | 5.13 10<sup>12</sup> |
C. | 3.29 10<sup>-6</sup> |
D. | 0.33 10<sup>-9</sup> |
Answer» B. 5.13 10<sup>12</sup> | |
3. |
An SOA has length of 35.43 10-3m, at 30 dB gain. Determine net gain coefficient. |
A. | 5.124 10<sup>-3</sup> |
B. | 1.12 10<sup>-4</sup> |
C. | 5.125 10<sup>-3</sup> |
D. | 2.15 10<sup>-5</sup> |
Answer» D. 2.15 10<sup>-5</sup> | |
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. |
Determine the peak gain wavelength of uncoated FPA having mode spacing of 2nm,and 250 mlong active region and R.I of 3.78.
|
A. | 4.53 10<sup>-8</sup> |
B. | 1.94 10<sup>-6</sup> |
C. | 4.25 10<sup>9</sup> |
Answer» D. | |
6. |
An uncoated FPA has peak gain wavelength 1.8 m, mode spacing of 0.8nm, and long active region of 300 v. Determine RI of active medium. |
A. | 4.25 10<sup>6</sup> |
B. | 3.75 10<sup>7</sup> |
C. | 3.95 10<sup>7</sup> |
D. | 4.25 10<sup>9</sup> |
Answer» C. 3.95 10<sup>7</sup> | |
7. |
______________ 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 | |
8. |
Mostly ____________ are used in nonlinear applications. |
A. | Semiconductor optical amplifier |
B. | Erbium-doped fiber amplifier |
C. | Raman fiber amplifier |
D. | FPAs |
Answer» E. | |
9. |
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 | |
10. |
________________ 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. | |
11. |
The more advantages optical amplifier is ____________ |
A. | Fiber amplifier |
B. | Semiconductor amplifier |
C. | Repeaters |
D. | Mode hooping amplifier |
Answer» C. Repeaters | |