OCN-UNIT 2-Q3

1. What is scattering loss in optical fibers?

• A) Absorption of light by the fiber material

• B) Dispersion of light into different modes

• C) Reflection of light at the fiber core-cladding interface

• D) Loss of signal strength due to the scattering of light by impurities or irregularities in the fiber

2. Which type of scattering loss is most significant in optical fibers at visible wavelengths?

• • A) Rayleigh scattering

• B) Mie scattering

• C) Raman scattering

• D) Brillouin scattering

3. Rayleigh scattering is primarily caused by:

• A) Large particles in the fiber core

• B) The interaction of light with the acoustic waves in the fiber

• C) Microscopic variations in the refractive index of the fiber material

• D) The absorption of light by dopants in the fiber

4. Scattering loss in optical fibers increases with:

• A) Decreasing wavelength of light

• B) Increasing wavelength of light

• C) Increasing core diameter

• D) Decreasing core diameter

5. Mie scattering occurs in optical fibers when:

• • A) The scattering particles are much smaller than the wavelength of light

• • B) The scattering particles are comparable in size to the wavelength of light

• • C) The scattering particles are much larger than the wavelength of light

• D) The scattering particles have no impact on the light

6. Which of the following is NOT a source of scattering loss in optical fibers?

• • A) Density fluctuations in the glass

• B) Microbending of the fiber

• C) Water molecules within the fiber

• D) Fiber core-cladding interface imperfections

7. The impact of Rayleigh scattering on optical fiber performance is more significant at:

• A) Low frequencies

• B) High frequencies

• C) Shorter wavelengths

• D) Longer wavelengths

8. Scattering loss can be minimized in optical fibers by:

• A) Using a smaller core diameter

• B) Reducing the wavelength of transmitted light

• C) Improving the purity of the fiber material

• D) Increasing the doping concentration

9. Brillouin scattering in optical fibers is related to:

• • A) The interaction of light with thermal vibrations

• B) The interaction of light with acoustic waves

• C) The interaction of light with dopants

• D) The interaction of light with impurities

10. What type of scattering loss is more significant in fibers operating in the infrared region?

• A) Rayleigh scattering

• • B) Mie scattering

• C) Raman scattering

• D) Brillouin scattering