Optical Communication Systems Quiz

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?

• 1.25%
• 5.00%
• 3.65%
• 2.10%

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.

• 40.1°
• 37.0°
• 42.3°
• 35.5°

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.

• Total internal reflection
• Absorption of light
• Diffraction of light
• Reflection at a boundary

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