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This section includes 6 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. |
In waveguide dispersion, refractive index is independent of ______________ |
A. | Bit rate |
B. | Index difference |
C. | Velocity of medium |
D. | Wavelength |
Answer» E. | |
2. |
The optical source used in a fiber is an injection laser with a relative spectral width / of 0.0011 at a wavelength of 0.70 m. Estimate the RMS spectral width. |
A. | 1.2 nm |
B. | 1.3 nm |
C. | 0.77 nm |
D. | 0.98 nm |
Answer» D. 0.98 nm | |
3. |
What is pulse dispersion per unit length if for a graded index fiber, 0.1 s pulse broadening is seen over a distance of 13 km? |
A. | 6.12ns/km |
B. | 7.69ns/km |
C. | 10.29ns/km |
D. | 8.23ns/km |
Answer» C. 10.29ns/km | |
4. |
A multimode graded index fiber exhibits a total pulse broadening of 0.15 sover a distance of 16 km. Estimate the maximum possible bandwidth, assuming no intersymbol interference. |
A. | 4.6 MHz |
B. | 3.9 MHz |
C. | 3.3 MHz |
D. | 4.2 MHz |
Answer» D. 4.2 MHz | |
5. |
The maximum bit rate that may be obtained on an optical fiber link is 1/3 . |
A. | True |
B. | False |
Answer» C. | |
6. |
For no overlapping of light pulses down on an optical fiber link, the digital bit rate BT must be ___________ |
A. | Less than the reciprocal of broadened pulse duration |
B. | More than the reciprocal of broadened pulse duration |
C. | Same as that of than the reciprocal of broadened pulse duration |
D. | Negligible |
Answer» B. More than the reciprocal of broadened pulse duration | |