Optical Fiber Communication - Basics

If a light travels in a certain medium and it gets reflected off an optically denser medium with high refractive index, then it is regarded as _______

• External Reflection

• Internal Reflection

• Refraction

• Both a and b

In an optical fiber, the concept of Numerical aperture is applicable in describing the ability of __________

• Light Collection

• Light Scattering

• Light Dispersion

• Light Polarization

Optical fibers for communication use are mostly fabricated from

• Plastic

• Silica or multicomponent glass

• Ceramics

• Copper

It is not important to cover the optical fibers required for transmission. State whether the given statement is true or false.

• YES

• No

A silica optical fiber with a large core diameter has a core refractive index of 1.5 and a Cladding refractive index of 1.47. Determine the acceptance angle in air for the fiber.

A silica optical fiber with core diameter large enough to be considered by Ray theory has a core refractive index of 1.5 and cladding refractive index of 1.47.Determine numerical aperture.

calculate the cut off wavelength of a single mode fibre with core radius of 4 m and index difference= 0.003

The V number of a fiber is 4. then the fiber is

• Single mode

• Multimode

The wavelength region used in second window

• 800 to 900 nm

• 1100 to 1350nm

• 1500 to 1650nm

• 1200 nm to 1400 nm

The significance of fourth generation optical communication system is

• Optical amplifier

• Optical source

• Optical coupler

• splicers