Fiber Optic and Laser Communication Quiz

The basic principle behind fiber optic communication is:

• Diffraction of light

• Reflection of light

• Total internal reflection

• Refraction of light

The core of an optical fiber has:

• Lower refractive index than the cladding

• Higher refractive index than the cladding

• Same refractive index as the cladding

• Zero refractive index

Which of the following is *not* a typical type of optical fiber?

• Step-index single-mode

• Step-index multi-mode

• Graded-index multi-mode

• Metallic-index fiber

The main advantage of optical fiber communication over copper cables is:

• Higher data rate and bandwidth

• Higher power loss

• Lower signal-to-noise ratio

• Easier splicing and connections

In fiber optics, signal attenuation is mainly caused by:

• Scattering and absorption

• Amplification and reflection

• Dispersion only

• Electromagnetic interference

The term *LASER* stands for:

• Light Amplification by Stimulated Emission of Radiation

• Light Absorption by Stimulated Emission of Radiation

• Light Amplification by Spontaneous Emission of Radiation

• Light Absorption by Spontaneous Emission of Radiation

In a laser, population inversion means:

• More electrons in the ground state than excited state

• Equal number of electrons in both states

• More electrons in the excited state than in the ground state

• Electrons continuously moving between energy levels

The process responsible for laser light amplification is:

• Spontaneous emission

• Stimulated emission

• Absorption

• Reflection

Which of the following is *not* a characteristic of laser light?

• Coherent

• Monochromatic

• Divergent

• Highly directional

The optical resonator in a laser consists of:

• Two parallel mirrors

• One convex and one concave mirror

• A prism and a lens

• Two polarizers