mode of propogation

this presentation based on modes of propogation .it's means in which way light can easily propogate

1. 1 Birla Vishvakarma Mahavidyalaya

2. Kardani Dhruvit P. 13008080125007 –B12 Production Engineeering Birla Vishvakrama maha Vidhyalaya Mode of Propogation

3. The Optical Fiber

4. Refraction and Reflection Snell’s Law: n 1 Sin Φ 1 = n 2 Sin Φ 2 When Φ 2 = 90, Φ 1 = Φ c is the Critical Angle Φ c= Sin -1 ( n 2 /n 1 )

5. Single Mode Step Index Fiber Only one propagation mode is allowed in a given wavelength. This is achieved by very small core diameter (8-10 µm) SMF offers highest bit rate, most widely used in telecom

6. Step Index Multimode Fiber Guided light propagation can be explained by ray optics When the incident angle is smaller the acceptance angle, light will propagate via TIR Large number of modes possible Each mode travels at a different velocity Modal Dispersion Used in short links, mostly with LED sources

7. Step Index Multimode Fiber Fractional refractive-index profile

8. Ray description of different fibers

9. Thank you