For suitable power confinement of fundamental mode, the normalized frequency v should be maintained in the range 1.5 to 2.4μm and the fractional index difference must be linearly increased as a square function while the core diameter is linearly reduced to keep v constant. This confinement is achieved by?

Increasing level of silica doping in fiber core

Increasing level of germanium doping in fiber core

Decreasing level of silica germanium in fiber core

Decreasing level of silica doping in fiber core

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1.	For suitable power confinement of fundamental mode, the normalized frequency v should be maintained in the range 1.5 to 2.4μm and the fractional index difference must be linearly increased as a square function while the core diameter is linearly reduced to keep v constant. This confinement is achieved by?
A.	Increasing level of silica doping in fiber core
B.	Increasing level of germanium doping in fiber core
C.	Decreasing level of silica germanium in fiber core
D.	Decreasing level of silica doping in fiber core
Answer» C. Decreasing level of silica germanium in fiber core

Discussion

2.	The dispersion due to material, waveguide and profile are -2.8nm-1km-1, 20.1nm-1km-1 and 23.2nm-1km-1respectively. Find the total first order dispersion?
A.	36.2psnm-1 km-1
B.	38.12psnm-1 km-1
C.	40.5psnm-1 km-1
D.	20.9psnm-1 km-1
Answer» D. 20.9psnm-1 km-1

Discussion

3.	Γg = dβ / C*dk. What is β in the given equation?
A.	Attenuation constant
B.	Propagation constant
C.	Boltzmann’s constant
D.	Free-space
Answer» C. Boltzmann’s constant

Discussion

4.	A multimode step index fiber has source of RMS spectral width of 60nm and dispersion parameter for fiber is 150psnm-1km-1. Estimate rms pulse broadening due to material dispersion.
A.	12.5ns km-1
B.	9.6ns km-1
C.	9.0ns km-1
D.	10.2ns km-1
Answer» D. 10.2ns km-1

Discussion

Explore topic-wise MCQs in Optical Communications Questions and Answers.

The dispersion due to material, waveguide and profile are -2.8nm-1km-1, 20.1nm-1km-1 and 23.2nm-1km-1respectively. Find the total first order dispersion?

Γg = dβ / C*dk. What is β in the given equation?

A multimode step index fiber has source of RMS spectral width of 60nm and dispersion parameter for fiber is 150psnm-1km-1. Estimate rms pulse broadening due to material dispersion.