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WorksheetsOptical Communication Systems Quiz
Total questions: 20
Worksheet time: 10mins
If light leaves a material with a refractive index of 1.45 and enters another material with a refractive index of 1, what will be the Fresnel loss?
Calculate the angle labeled θ2 in the image below. The first material has a refractive index (n1) of 1.51 and the angle of incidence of the ray to the boundary (θ2) is 38°, while the second material has a refractive index (n2) of 1.46.
The event in light reflection occurs when the angle of incidence is such that the angle of refraction is exactly 90°, causing the ray to travel parallel to the boundary within the second material.
What is the basic technique for making optical fibers?
Vapor Phase Oxidation
Chemical Vapor Deposition
Modified Chemical Vapor Deposition
Outside Vapor Phase Oxidation
What is the process of transforming into homogeneous glass without melting?
Sintering
Vitrification
Deposition
Oxidation
What does MCVD stand for?
Modified Chemical Vapor Deposition
Metal Chemical Vapor Deposition
Molecular Chemical Vapor Deposition
Mass Chemical Vapor Deposition
What is the MCVD method used for?
To produce very low loss graded-index fiber
To create clear glass material directly
To initiate chemical reactions at low pressure
To form soot during the process
What is the main difference between MCVD and PCVD?
MCVD uses soot formation while PCVD does not
PCVD operates at higher temperatures than MCVD
MCVD is a newer method than PCVD
Both methods are identical
What does the term 'Numerical Aperture' refer to?
The maximum angle of light that can enter the fiber
The difference in refractive index
The diameter of the fiber core
The length of the fiber
What happens to the light path in optical fibers as the angle of incidence increases?
The path becomes shorter
The path becomes longer
The light is completely reflected
The light is absorbed
What is the V-parameter used for?
To determine the number of modes in a single mode fiber
To calculate the refractive index
To measure the temperature of the fiber
To assess the clarity of the glass
Calculate V; Ω; M; P clad/P; λc; for a step index fiber with a = 10 μm, n1 = 1.48; ∆ = 0.001; λ= 1.3 μm; If ∆ = 0.03, calculate M and P clad/P;
What is the intrinsic property of glass that absorbs light?
Natural property of glass
Strong in ultraviolet region
Peak at 7 μm and 12 μm
Heat energy causes atomic movement
What are the extrinsic factors affecting absorption?
Impurities in the fiber
Transition metal ions
Absorption peaks at specific wavelengths
All of the above
What causes Rayleigh scattering?
Movement of gel in media
Backscattering of light
Presence of impurities
All of the above
What is the effect of geometry on fiber attenuation?
Bending and curvature
Random fluctuations
Both A and B
None of the above
What is the loss in core and cladding materials?
What is material dispersion in fiber optics?
What is the impact of wavelength on index of refraction?
Calculate the material dispersion σmat, waveguide dispersion σwg, intramode dispersion σimod, and intermode dispersion σamod for a multimode step index optical fiber with n1= 1.48, n2= 1.475, L = 75 Km, Dmat= 60 ps/Km-nm, Dwg= 1 ps/Km-nm, and source optical σλ= 50 nm.
