Explore topic-wise MCQs in Optical Communications.

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