MCQOPTIONS
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MCQOPTIONS
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. |
Non-zero-dispersion-shifted fiber was introduced in the year 2000. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
The variant of non-zero-dispersion-shifted fiber is called as __________ |
| A. | Dispersion flattened fiber |
| B. | Zero-dispersion fiber |
| C. | Positive-dispersion fiber |
| D. | Negative-dispersion fiber |
| Answer» E. | |
| 3. |
Any amount of stress occurring at the core-cladding interface would be reduced by grading the material composition. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
For suitable power confinement of fundamental mode, the normalized frequency v should be maintained in the range 1.5 to 2.4 m and the fractional index difference must be linearly increased as a square function while the core diameter is linearly reduced to keep v constant. This confinement is achieved by? |
| A. | Increasing level of silica doping in fiber core |
| B. | Increasing level of germanium doping in fiber core |
| C. | Decreasing level of silica germanium in fiber core |
| D. | Decreasing level of silica doping in fiber core |
| Answer» C. Decreasing level of silica germanium in fiber core | |
| 5. |
The fibers which relax the spectral requirements for optical sources and allow flexible wavelength division multiplying are known as __________ |
| A. | Dispersion-flattened single mode fiber |
| B. | Dispersion-enhanced single mode fiber |
| C. | Dispersion-compressed single mode fiber |
| D. | Dispersion-standardized single mode fiber |
| Answer» B. Dispersion-enhanced single mode fiber | |
| 6. |
An alternative modification of the dispersion characteristics of single mode fibers involves achievement of low dispersion gap over the low-loss wavelength region between __________ |
| A. | 0.2 and 0.9 m |
| B. | 0.1 and 0.2 m |
| C. | 1.3 and 1.6 m |
| D. | 2 and 3 m |
| Answer» D. 2 and 3 m | |
| 7. |
Dispersion-shifted single mode fibers are created by __________ |
| A. | Increasing fiber core diameter and decreasing fractional index difference |
| B. | Decreasing fiber core diameter and decreasing fractional index difference |
| C. | Decreasing fiber core diameter and increasing fractional index difference |
| D. | Increasing fiber core diameter and increasing fractional index difference |
| Answer» D. Increasing fiber core diameter and increasing fractional index difference | |
| 8. |
A single mode fiber has a zero dispersion wavelength of 1.21 m and a dispersion slope of 0.08 psnm-2km-1. What is the total first order dispersion at wavelength 1.26 m. |
| A. | -2.8psnm<sup>-1</sup> km<sup>-1</sup> |
| B. | -3.76psnm<sup>-1</sup> km<sup>-1</sup> |
| C. | -1.2psnm<sup>-1</sup> km<sup>-1</sup> |
| D. | 2.4psnm<sup>-1</sup> km<sup>-1</sup> |
| Answer» C. -1.2psnm<sup>-1</sup> km<sup>-1</sup> | |
| 9. |
Most of the power in an optical fiber is transmitted in fiber cladding. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
g = d / C*dk. What is in the given equation? |
| A. | Attenuation constant |
| B. | Propagation constant |
| C. | Boltzmann s constant |
| D. | Free-space |
| Answer» C. Boltzmann s constant | |
| 11. |
A multimode step index fiber has source of RMS spectral width of 60nm and dispersion parameter for fiber is 150psnm-1km-1. Estimate rms pulse broadening due to material dispersion. |
| A. | 12.5ns km<sup>-1</sup> |
| B. | 9.6ns km<sup>-1</sup> |
| C. | 9.0ns km<sup>-1</sup> |
| D. | 10.2ns km<sup>-1</sup> |
| Answer» D. 10.2ns km<sup>-1</sup> | |