Explore topic-wise MCQs in Optical Communications.

This section includes 7 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.

Skew rays follow a ___________

A. Hyperbolic path along the axis
B. Parabolic path along the axis
C. Helical path
D. Path where rays changes angles at core-cladding interface
Answer» D. Path where rays changes angles at core-cladding interface
Discussion
2.

Meridional rays in graded index fibers follow ____________

A. Straight path along the axis
B. Curved path along the axis
C. Path where rays changes angles at core-cladding interface
D. Helical path
Answer» C. Path where rays changes angles at core-cladding interface
Discussion
3.

Most of the optical power is carried out in core region than in cladding.

A. True
B. False
Answer» B. False
Discussion
4.

For lower bandwidth applications ______________

A. Single mode fiber is advantageous
B. Photonic crystal fibers are advantageous
C. Coaxial cables are advantageous
D. Multimode fiber is advantageous
Answer» E.
Discussion
5.

A single-mode step-index fiber or multimode step-index fiber allows propagation of only one transverse electromagnetic wave.

A. True
B. False
Answer» B. False
Discussion
6.

A step-index fiber has core refractive index 1.46 and radius 4.5 m. Find the cutoff wavelength to exhibit single mode operation. Use relative index difference as 0.25%.

A. 1.326 m
B. 0.124 m
C. 1.214 m
D. 0.123 m
Answer» D. 0.123 m
Discussion
7.

A graded-index fiber has a core with parabolic refractive index profile of diameter of 30 m, NA=0.2, =1 m. Estimate the normalised frequency.

A. 19.32
B. 18.84
C. 16.28
D. 17.12
Answer» C. 16.28
Discussion