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Optical Communication: Optical Fiber and their properties
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Optical Communication: Optical Fiber and their properties
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25 Questions

1. One of the given statements is true for intermodal dispersion. Choose the right one.
2. Calculate the numerical aperture of an optical fibre whose core and cladding are made of materials of refractive index 1.6 and 1.5 respectively.
3. The ratio of speed of light in air to the speed of light in another medium is called as _________
4. What is the numerical aperture of the fiber if the angle of acceptance is 16 degree?
5. Which of the following is known as fibre optic back bone?
6. Which equations are best suited for the study of electromagnetic wave propagation?
7. When light is described as an electromagnetic wave, it consists of a periodically varying electric E and magnetic field H which are oriented at an angle?
8. Plastic fibers are less widely used than glass fibers.
9. For lower bandwidth applications ______________
10. What is refraction?
11. Skew rays follow a ___________
12. When a ray of light enters one medium from another medium, which quality will not change?
13. The phenomenon which occurs when an incident wave strikes an interface at an angle greater than the critical angle with respect to the normal to the surface is called as ____________
14. How many propagation modes are present in single mode fibers?
15. Light incident on fibers of angles________the acceptance angle do not propagate into the fiber.
16. A single mode fibre has low intermodal dispersion than multimode.
17. What is the principle of fibre optical communication?
18. A monochromatic wave propagates along a waveguide in z direction. These points of constant phase travel in constant phase travel at a phase velocity Vp is given by?
19. A single mode fiber has a beat length of 4cm at 1200nm. What is birefringence?
20. How does the refractive index vary in Graded Index fibre?
21. Which of the following has more distortion?
22. What causes microscopic bend?
23. Who proposed the idea of transmission of light via dielectric waveguide structure?
24. Which law gives the relationship between refractive index of the dielectric?
25. An optical fiber has a core radius 2μm and a numerical aperture of 0.1. Will this fiber operate at single mode at 600 nm?