Name of the College : Easwari Engineering College
University : Anna University
Subject Code/Name : EC2402-Optical Communication And Networking
Dept : Electronics and Communication Engineering
Degree : B.E
Year: IV
Website : srmeaswari.ac.in
Document Type : Question Bank
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/srmeaswari.ac.in/3319-OCN%20QB%202014.doc
SRM Optical Communication & Networking Question Paper
QUESTION BANK :
UNIT I :
PART – A
1. A point source of light is 12cm below the surface of a large body of water(n=1.33). What is the radius of the largest circle on the water surface through which the light can emerge? (Nov 2004, Dec2005)
Related : SRM Easwari BA7026 Banking And Financial Service Management MBA Question Bank : www.pdfquestion.in/3352.html
2. Write the expression for the refractive index in graded index fiber (Nov2004,Dec2006)
3. Define: Numerical Aperture of a step index fiber (Apr 2005,Dec 2007)
4. Give the expression for the effective number of modes guided by a curved multimode fiber. (Apr 2005,Nov 2004,Dec2005)
5. Commonly available single mode fibers have beat lengths in the range 10cm< LP <2m. What is the range of refractive index differences does this correspond to. (for ?=1300nm). (Nov 2005,April2006)
6. Define mode field diameter. (April 2005,May 2006,Dec 2006)
7. What is the fundamental parameter of a single mode fiber? ( Apr 2006,June 2007)
8. A step index fiber has a normalized frequency V=26.6 at 1300nm wavelength. If the core radius is 25 µm, find the numerical aperture (Apr 2006,June 2007)
9. What is snells law? (Dec 2006)
10. What is modal birefringence? (Dec 2006,June 2009)
11. Write the expression for number of modes in SI fibers.
12. State the condition for total internal reflection. (Nov 2007)
13. What is skew ray and meridional ray?
14. Differentiate between single mode and multimode fiober.
15. Draw the index profile for graded index fiber.
16. An optical fiber has core index 1.5, cladding index of 1.45. Calculate numerical aperture and critical angle of incidence. (Jun 2007)
17. Give the difference between ray and modes (Nov 2007)
18. A silica optical fiber has a core refractive index of 1.5 and a cladding refractive index of 1.47. Determine the acceptance angle in air for the fiber. (Nov 2007)
19. Mention the advantages and disadvantages of mono mode fibre over multi mode fibre. (Apr 2008)
20.What are the advantages and disadvantages of ray optics theory (Nov 2008)
PART – B
21.A typical relative refractive index difference for an optical fibre design for long core index is 1.47. {Nov 2008)
22.Define group delay. (Nov 2008)
23. What is critical angle of incidence? (May 2009)
24. What is meant by acceptance angle? (May 2009)
25. What is meant by leaky modes?
26. A single mode fiber has a beat length of 8cm at 1300nm. Calculate modal birefringence.
27. What is fiber beat length? (May 2009)
28. Differentiate Monomode and multimode fibers (Nov 2010)
29. Mention any two limitations of fiber optical communication system (Nov2010)
30. What is the energy of a single photon of the light whose ?=1550nm,in eV?(Nov-2011)
31. Assume that there is a glass rod of refractive index 1.5, surrounded by air.Find the critical incident angle. (Nov-2011)
32. The relative refractive index difference for an optical fiber is 1%.Determine the critical angle and core cladding interface if the core refractive index is 1,46 (May 2012)
33. A Step index fiber has a normalized frequency(V) of 26.6 at 1300nm.if the core radius is 25 µm, find the numerical aperture (May 2012)
34. Calculate the cutoff wavelength of a single mode fiber with core radius of 4µm (Nov 2012)
35. For a fiber with core refractive index of 1.54 and fractional refractive index difference of 0.01, calculate its numerical aperture. (Nov 2012)
36. The refractive indexes of the core and cladding of a silica fiber are 1.48 and 1.46 respectively. Find the acceptance angle for the fiber. (Nov 2013)
37. Determine the normalized frequency at 820nm for a step –index fiber having a 25 µm radius. The refractive indexes of the cladding and the core are 1.45 and 1.47 respectively. How many modes propogate in this fiber at 820nm? (Nov 2013)
38. A multimode fiber has core diameter of 50 µm and cladding refractive index of 1.45.If its modal dispersion is 10ns/km, find its numerical aperture. (May 2014)
39. Distinguish meridional rays from skew rays. (May 2014)