MCQOPTIONS
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MCQOPTIONS
This section includes 8 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. |
The intrinsic loss through a multimode fiber joint is independent of direction of propagation. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
In a single mode fiber, the losses due to lateral offset and angular misalignment are given by 0.20 dB and 0.46 dB respectively. Find the total insertion loss. |
| A. | 0.66 dB |
| B. | 0.26 dB |
| C. | 0.38 dB |
| D. | 0.40 dB |
| Answer» B. 0.26 dB | |
| 3. |
Determine coupling efficiency if the misalignment loss in a graded index fiber is 0.102. |
| A. | 0.136 |
| B. | 0.898 |
| C. | 0.982 |
| D. | 0.684 |
| Answer» C. 0.982 | |
| 4. |
A graded index fiber has a parabolic refractive index profile ( =2) and core diameter of 42 m. Estimate an insertion loss due to a 2 m lateral misalignment when there is index matching and assuming there is uniform illumination of all guided modes only. |
| A. | 0.180 |
| B. | 0.106 |
| C. | 0.280 |
| D. | 0.080 |
| Answer» E. | |
| 5. |
Losses caused by factors such as core-cladding diameter, numerical aperture, relative refractive index differences, different refractive index profiles, fiber faults are known as ____________ |
| A. | Intrinsic joint losses |
| B. | Extrinsic losses |
| C. | Insertion losses |
| D. | Coupling losses |
| Answer» B. Extrinsic losses | |
| 6. |
Two joined graded index fibers that are perfectly aligned have refractive indices R = 1.93 for receiving fiber E = 2.15 for emitting fiber. Calculate the coupling loss. |
| A. | 0.23 dB |
| B. | 0.16 dB |
| C. | 0.82 dB |
| D. | 0.76 dB |
| Answer» B. 0.16 dB | |
| 7. |
The ratio r = (n1 n)/(n1 n) indicates ____________ |
| A. | Fresnel reflection |
| B. | Reflection coefficient |
| C. | Refraction coefficient |
| D. | Angular power distribution coefficient |
| Answer» C. Refraction coefficient | |
| 8. |
A measure of amount of optical fiber emitted from source that can be coupled into a fiber is termed as ______________ |
| A. | Radiance |
| B. | Angular power distribution |
| C. | Coupling efficiency |
| D. | Power-launching |
| Answer» D. Power-launching | |