FON quiz 12

Multimode step index fiber has

• a) Large core diameter & large numerical aperture

• b) Large core diameter and small numerical aperture

• c) Small core diameter and large numerical aperture

• d) Small core diameter & small numerical aperture

A multimode step index fiber has a large core diameter of range

• a) 100 to 300 μm

• b) 100 to 300 nm

• c) 200 to 500 μm

• d) 200 to 500 nm

The performance characteristics of multimode graded index fibers are

• a) Better than multimode step index fibers.

• b) Same as multimode step index fibers.

• c) Lesser than multimode step index fibers

• d) Negligible

The fibers mostly not used nowadays for optical fiber communication system are

• a) Single mode fibers

• b) Multimode step fibers

• c) Coaxial cables

• d) Multimode graded index fibers

A permanent joint formed between two different optical fibers in the field is known as a

• a) Fiber splice

• b) Fiber connector

• c) Fiber attenuator

• d) Fiber dispersion

How many types of fiber splices are available?

• a) One

• b) Two

• c) Three

• d) Four

It is a passive device which allows the flow of optical signal power in only one direction and preventing reflections in the backward direction.

• a) Fiber slice

• b) Optical fiber connector

• c) Optical isolator

• d) Optical coupler

Magneto-optic devices can be used to function as isolators. State whether the given statement is true or false.

• a) True

• b) False

A device which is made of isolators and follows a closed loop path is called as a ____________

• a) Circulator

• b) Gyrator

• c) Attenuator

• d) Connector

Optical fiber couplers are also called as ________________

• a) Isolators

• b) Circulators

• c) Directional couplers

• d) Attenuators