MCQOPTIONS
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MCQOPTIONS
This section includes 23 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. |
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 (α=2) and core diameter of 42μm. Estimate an insertion loss due to a 2 μm lateral misalignment when there is index matching and assuming there is uniform illumination of all guided modes only. |
| A. | 0.18 |
| B. | 0.106 |
| C. | 0.280 |
| D. | 0.080 |
| Answer» E. | |
| 5. |
A step index fiber has a coupling efficiency of 0.906 with uniform illumination of all propagation modes. Find the insertion loss due to lateral misalignment? |
| A. | 0.95 dB |
| B. | 0.40 dB |
| C. | 0.42 dB |
| D. | 0.62 dB |
| Answer» D. 0.62 dB | |
| 6. |
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 | |
| 7. |
Two joined graded index fibers that are perfectly aligned have refractive indices αR = 1.93 for receiving fiber αE = 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 | |
| 8. |
Two joined step index fibers are perfectly aligned. What is the coupling loss of numerical aperture are NAR= 0.26 for emitting fiber? |
| A. | -0.828 dB |
| B. | -0.010 dB |
| C. | -0.32 dB |
| D. | 0.32 dB |
| Answer» C. -0.32 dB | |
| 9. |
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 | |
| 10. |
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 | |
| 11. |
A_STEP_INDEX_FIBER_HAS_A_COUPLING_EFFICIENCY_OF_0.906_WITH_UNIFORM_ILLUMINATION_OF_ALL_PROPAGATION_MODES._FIND_THE_INSERTION_LOSS_DUE_TO_LATERAL_MISALIGNMENT??$ |
| A. | 0.95 dB |
| B. | 0.40 dB |
| C. | 0.42 dB |
| D. | 0.62 dB |
| Answer» D. 0.62 dB | |
| 12. |
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 | |
| 13. |
A_graded_index_fiber_has_a_parabolic_refractive_index_profile_(α=2)_and_core_diameter_of_42μm._Estimate_an_insertion_loss_due_to_a_2_μm_lateral_misalignment_when_there_is_index_matching_and_assuming_there_is_uniform_illumination_of_all_guided_modes_only.$# |
| A. | 0.180 |
| B. | 0.106 |
| C. | 0.280 |
| D. | 0.080 |
| Answer» E. | |
| 14. |
The intrinsic loss through a multimode fiber joint is independent of direction of propagation. State whether the given statement is true or false |
| A. | True |
| B. | False |
| Answer» C. | |
| 15. |
In_a_single_mode_fiber,_the_losses_due_to_lateral_offset_and_angular_misalignment_are_given_by_0.20_dB_and_0.46_dB_respectively._Find_the_total_insertion_loss |
| A. | 0.66 dB |
| B. | 0.26 dB |
| C. | 0.38 dB |
| D. | 0.40 dB |
| Answer» B. 0.26 dB | |
| 16. |
Losses caused by factors such as core-cladding diameter, numerical aperture, relative refractive index differences, different refractive index profiles, fiber faults are known a? |
| A. | Intrinsic joint losses |
| B. | Extrinsic losses |
| C. | Insertion losses |
| D. | Coupling losses |
| Answer» B. Extrinsic losses | |
| 17. |
How many types of misalignments occur when joining compatible fiber? |
| A. | One |
| B. | Two |
| C. | Five |
| D. | Three |
| Answer» E. | |
| 18. |
Two joined graded index fibers that are perfectly aligned have refractive indices αR=1.93for receiving fiber αE= 2.15 for emitting fiber. Calculate the coupling loss$ |
| A. | 0.23 dB |
| B. | 0.16 dB |
| C. | 0.82 dB |
| D. | 0.76 dB |
| Answer» B. 0.16 dB | |
| 19. |
Two joined step index fibers are perfectly aligned. What is the coupling loss of numerical aperture are NAR= 0.26 for emitting fiber? |
| A. | -0.828 dB |
| B. | -0.010 dB |
| C. | -0.32 dB |
| D. | 0.32 dB |
| Answer» C. -0.32 dB | |
| 20. |
A particular GaAs fiber has a Fresnel reflection magnitude of 17.6% i.e. 0.176. Find the power loss between the source and the fiber? |
| A. | 0.86 dB |
| B. | 0.78 dB |
| C. | 0.84 dB |
| D. | 0.83 dB |
| Answer» D. 0.83 dB | |
| 21. |
A GaAs optical source having a refractive index of 3.2 is coupled to a silica fiber having a refractive index of 1.42. Determine Fresnel reflection at interface in terms of percentage. |
| A. | 13.4% |
| B. | 17.4% |
| C. | 17.6% |
| D. | 14.8% |
| Answer» E. | |
| 22. |
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 | |
| 23. |
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 | |