Optical Communication Mock Test 3

10%

Question 1 of 10

1. Optical fiber couplers are also called as ________________

Isolators

Circulators

Attenuators

Directional couplers

Question 1 of 10

Question 2 of 10

2. Which process gives the laser its special properties as an optical source?

Dispersion

Spontaneous emission

Stimulated absorption

Stimulated emission

Question 2 of 10

Question 3 of 10

3. Two joined step index fibers are perfectly aligned. What is the coupling loss of numerical aperture are NA_R= 0.26 for emitting fiber?

0.32 dB

-0.828 dB

-0.32 dB

-0.010 dB

Question 3 of 10

Question 4 of 10

4. What is the main requirement with the fibers that are intended for splicing?

Smooth and oval end faces

Smooth and square end faces

Rough edge faces

Large core diameter

Question 4 of 10

Question 5 of 10

5. In connectors, the fiber ends are separated by some gap. This gap ranges from ____________

0.12 to 0.16 mm

0.025 to 0.10 mm

0.030 to 0.2mm

0.040 to 0.045 mm

Question 5 of 10

Question 6 of 10

6. How many types of multiport optical fiber couplers are available at present?

Four

One

Three

Two

Question 6 of 10

Question 7 of 10

7. GRIN-rod lens connectors have loss characteristics that are independent of the modal power distribution in the fiber.

False

True

Question 7 of 10

Question 8 of 10

8. The rounding of the fiber ends with a low energy discharge before pressing the fibers together and fusing with a stronger arc is called as ____________

Crystallization

Diffusion

Pre-fusion

Alignment

Question 8 of 10

Question 9 of 10

9. A four-port FBT coupler has 60μW optical power launched into port one. The output powers at ports 2, 3, 4 are 0.0025, 18, and 22 μW respectively. Find the split ratio?

45%

42%

52%

46%

Question 9 of 10

Question 10 of 10

10. 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?

0.84 dB

0.86 dB

0.78 dB

0.83 dB

Question 10 of 10