1 About how much optical fiber is deployed around the world

1. About how much optical fiber is deployed around the world? _________km

2. Fiber carries_____, ______ and ______ in the form of signals at very high______

3. One strand of fiber is about the diameter of a human ________

4. The two parts of the fiber include the ______ and the _______

5. The center part of the cable, also called the ____________, is the area through which_________________________________________________________

6. The ________ layer completely surrounds the center part, and keeps _______________________________________________________.

7. Comparison of single mode fiber versus multimode fiber:

8. Three attributes limit fiber carrying capacity, or _____________, are:

1-___________ , which refers to along the length of the fiber.

2- ___________ ,which is the distortion of a ___________ along the fiber length. Different _____________ travel at different __________

9. Optical fibers operate under the principle of ______________ ___________ _________, which keeps the light within the core and guides it down the length of the fiber.

10. _________ refers to the bending of light as it passes from one ___________ to another. Glass in the core has a ____________ refractive index than glass in the cladding

Solution

1. 2 billion kilometer

2. Voice, data and signal, speed

3. hair

4. core and cladding

5. core, optical signals are transmitted

6. cladding, the core part shielded from any external damage and prevents adjacent fibres from touching each other.

7. Multimode fiber has larger light carrying core, single mode fiber has relatively small core. In multimode fiber, signal quality reduces over long distance due to attenuation and hence they are used for short distance communication. Single mode fibers have low attenuation and are used for long distance communication

8. Bandwidth, 1- dispersion, 2- attenuation, signal, wavelength, speed

9. Total internal reflection

10. Total internal reflection, medium, greater