Swayam Central

Fiber Optics

By Prof. Vipul Rastogi   |   IIT Roorkee
The course is aimed at equipping the undergraduate Engineering and Physics students with the basic understanding of optical fibers and optical fiber communication. The course provides knowledge of optical fiber waveguide at fundamental level, essentials of an optical fiber communication system and understanding of various components of an optical fiber telecommunication system.

INTENDED AUDIENCE : It is an elective course for Undergraduate students of Electronics and Communication Engineering, Computer Science and Engineering, Electrical Engineering, Information Technology, Engineering Physics, and Industry Personnel of Optical Fiber and Communication Industry
PRE-REQUISITES      : A basic course on Electromagnetic Theory
INDUSTRY SUPPORT    : Sterlite Technologies Ltd., Tejas Networks, Ciena Networks, Infinera India Pvt. Ltd, Eagle Photonics, Nest Photonics, etc, may recognize the course.

Learners enrolled: 2436


Course Status : Ongoing
Course Type : Elective
Duration : 8 weeks
Start Date : 27 Jan 2020
End Date : 20 Mar 2020
Exam Date : 29 Mar 2020
Enrollment Ends : 03 Feb 2020
Category :
  • Multidisciplinary
  • Physics
  • Level : Undergraduate/Postgraduate
    This is an AICTE approved FDP course


    Week 1:  Introduction, need for optical communication, salient features of optical fibers, ray theory of light guidance, numerical
    aperture, modes of a fiber, single and multimode fibers, step-index and graded-index fibers, fiber fabrication techniques
    Week 2:  Transmission characteristics of optical fibers, attenuation, pulse broadening mechanism, intermodal dispersion, bit rate -
    length product, material dispersion, electromagnetic wave analysis of light propagation in an infinitely extended medium, em
    waves in dielectrics, boundary conditions
    Week 3:  Electromagnetic analysis of planar optical waveguides, TE and TM modes, planar mirror waveguide, dielectric symmetric step-
    index, planar waveguide, symmetric and anti-symmetric modes, b-V curves, modal fields
    Week 4:  Power associated with modes of dielectric symmetric planar waveguide, asymmetric planar waveguide, single polarization
    single mode waveguide, excitation of guided modes by prism coupling technique, radiation modes, optical fiber waveguide,
    EH and HE modes, weakly guiding fibers, LP modes, mode cut-offs, b-V curves
    Week 5:
      Optical fiber modes, field patterns, degeneracies, fractional power in the core, single mode fiber, cut-off wavelength, mode
    field diameter, bend loss, splice loss, waveguide dispersion, group delay
    Week 6:  Total chromatic dispersion, pulse broadening and chirping, dispersion in graded-index and multilayer fibers, optical fiber
    components and devices, directional coupler, power splitter, WDM coupler, polarization controllers, fiber Bragg gratings
    Week 7:
      Various types of fiber Bragg gratings, fabrication methods, applications, long period gratings, optical fiber amplifier, erbium
    doped fiber amplifier, dispersion management, dispersion shifted fiber, dispersion compensating fiber, sources for optical fiber
    communication, light emitting diode, internal and external quantum efficiencies, LED characteristics, laser diode
    Week 8:  Detectors for optical communication, p-i-n photodetector, APD, System design, dispersion and attenuation limited systems,
    BER, power budgeting of fiber link, recent advances


    • Ghatak A K and Thyagarajan K, “Introduction to Fiber Optics”, Cambridge University Press
    • Saleh B E A and Teich M C, “Fundamentals of Photonics,” Wiley-Interscience
    • Agrawal G P, “ Optical Fiber Communication System,” Wiley-Interscience
    • Keiser G, “Optical Fiber Communications”, McGraw Hill
    • Snyder A and Love J, “Optical Waveguide Theory”, Chapmann and Hall
    • Senior J M, “Optical Fiber Communications,” Pearson Prentice Hall


    Prof. Vipul Rastogi

    IIT Roorkee
    Dr. Vipul Rastogi received PhD degree from the Indian Institute of Technology, Delhi, India in 1998. He carried out post-doctorate in Université de Nice Sophia Antipolis, France during 1998 – 1999. From 2000 to 2003 he worked in the Department of Electronic Engineering in City University of Hong Kong as a Research Fellow. In November 2003 he joined Department of Physics at Indian Institute of Technology Roorkee, where he is now an Associate Professor. His current research interests are in optical fiber designs for high power lasers and high data rate optical communication, erbium doped fiber amplifier for SDM communication system, optical fiber sensors, and optoelectronic devices. He has published over 150 research papers in refereed journals and conferences. He is a member of IEEE Photonics Society, Senior Member of Optical Society of America, Life Member of Indian Laser Association and Fellow of Optical Society of India. IIT Roorkee honored him with an Outstanding Teacher Award in the year 2011. He is a recipient of IAPT-Dinbandhu Sahu Memorial award for undergraduate Physics teaching from Indian Association of Physics Teachers in the year 2016.


    • The course is free to enroll and learn from. But if you want a certificate, you have to register and write the proctored exam conducted by us in person at any of the designated exam centres.
    • The exam is optional for a fee of Rs 1000/- (Rupees one thousand only).
    Date and Time of Exams: 29th March 2020, Morning session 9am to 12 noon; Afternoon Session 2pm to 5pm.
    • Registration url: Announcements will be made when the registration form is open for registrations.
    • The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published. If there are any changes, it will be mentioned then.
    • Please check the form for more details on the cities where the exams will be held, the conditions you agree to when you fill the form etc.

    • Average assignment score = 25% of average of best 6 assignments out of the total 8 assignments
    given in the course.
    • Exam score = 75% of the proctored certification exam score out of 100
    • Final score = Average assignment score + Exam score

    • If one of the 2 criteria is not met, you will not get the certificate even if the Final score >= 40/100.
    • Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Roorkee. It will be e-verifiable at nptel.ac.in/noc.
    • Only the e-certificate will be made available. Hard copies will not be dispatched.