FON quiz 16 (module 1 part 3)

Photonic crystal fibers also called as

• a) Conventional fibers

• b) Dotted fibers

• c) Stripped fibers

• d) Holey fibers

Conventional optical fibers has more transmission losses than photonic crystal fibers. State whether the statement is true or false.

• a) True

• b) False

Losses in photonic crystal fibers are reduced to a level of

• a) 0.1dB/km

• b) 0.2dB/km

• c) 0.3dB/km

• d) 0.4dB/km

The high index contrast enables the PCF core to be reduced from around 8 μmin conventional fiber to

• a) Less than 1μm

• b) More than 5μm

• c) More than 3μm

• d) More than 2μm

The periodic arrangement of cladding air holes in photonic band gap fibers provides for the formation of a photonic band gap in the

• a) H-plane of fiber

• b) E-plane of fiber

• c) E-H-plane of fiber

• d) Transverse plane of fiber

In index-guided photonic crystal fiber structure, the dark areas are air holes. What does white areas suggests?

• a) Air

• b) Silica

• c) Water

• d) Plasma

The unit of measurement of attenuation in optical fibers is

• a) km

• b) dB

• c) dB/km

• d) Coulomb’s

The optical fiber incurs a loss in signal power as light travels down the fiber which is called as

• a) Scattering

• b) Attenuation

• c) Absorption

• d) Refraction

A device which reduces the intensity of light in optical fiber communications is

• a) compressor

• b) Optical attenuator

• c) Barometer

• d) Reducer

A decibel may be defined as the ratio of input and output optical power for a particular optical wavelength. State whether the following statement is true or false.

• a) True

• b) False