Optical Fiber Communication — What This Subject Is About
To understand and apply the principles of optical communication systems — fibre optic technology being the most economical and efficient medium for wired communication, with lower costs than copper, improved transmission quality and reduced maintenance.
Subject 5.1 (Theory) + 5.5 (Lab) • Total 200 Marks • 7 Credits • 5th Semester — Electronics Engineering • Session 2026–27
About this document: Optical Fiber Communication appears twice in the 5th semester — as a theory paper (5.1) and as a lab (5.5). Both are covered here, completely, in the official order.
What You Will Study
Unit 1 — Introduction (8 Periods, 16%)
Various wired communication mediums – copper wire and optical fiber cable. Electromagnetic spectrum, optical band and its range, Optical windows. General Block diagram of optical Fiber communication system. Advantages, disadvantages and application of Fiber Optic communication.
Why fibre beats copper: the optical band, the parts of a fibre-optic link, and its advantages, disadvantages and applications.
Unit 2 — Optical Fiber (12 Periods, 21%)
Nature of light, its properties, Definition and concept of Reflection, refraction dispersion, diffraction, absorption, Total internal reflection (TIR) and scattering of light ray. Propagation of light in optical fiber, Ray model, Theoretical approach to Wave model, Snell’s law, definition and concept of Critical angle, numerical aperture, acceptance angle and acceptance cone - (Numerical on above concepts).
The optics behind fibre: total internal reflection, critical angle, numerical aperture and acceptance cone — with numerical problems.
Unit 3 — Fiber Materials, Connectors, Coupler, Splicer and Losses (12 Periods, 21%)
Fiber materials, Structure of fiber, Dimension of fiber. Optical fiber classification based on Modes and index profile, Modes of light propagation in fiber. Optical fiber connections: joints and Couplers-Fiber alignment and joint loss, fiber splicing techniques (Mechanical, fusion). fiber connectors, Losses and signal degradation in optical fiber.
What fibre is made of, how it is classified by mode and index profile, how fibres are joined and spliced, and where signal is lost.
Unit 4 — Optical Sources and Detectors (12 Periods, 21%)
Optical sources: LED, LASER, construction and working, Characteristics, specifications & Comparison. Optical detectors: PIN diode, Avalanche photo diode- construction, working, Characteristics, specifications & Comparison.
The light sources (LED and laser) and the detectors (PIN and avalanche photodiodes) at the two ends of a fibre link, compared side by side.
Unit 5 — Optical Amplifiers and Its Type (12 Periods, 21%)
Optical Amplifiers: Types of optical amplifiers, semiconductor & fiber optical amplifiers, principle of operation of SOA, types of SOA. EDFA, Raman amplifiers. Comparison of SOA, EDFA and Raman Amplifiers.
Amplifiers that boost light without converting it to electricity: semiconductor, erbium-doped fibre (EDFA) and Raman amplifiers.
Practical Work
- To identify and use various components and tools used in optical fiber communication.
- To view and draw the structure of an optical fiber and cable.
- To observe the Total Internal Reflection (TIR) and Light transmission.
- To calculate NA of given optical fiber.
- To set up fiber optic analog link.
- To set up fiber optic digital link.
And more — the complete list of 15 practicals is inside the PDF.
Complete Syllabus
The full examination scheme, the complete practicals list and the reference books from the official syllabus. The unit-wise topics are in the "What You Will Study" section above.
Examination Scheme
| Code | Paper | Type | L – P | Credits | Internal | External | Total |
|---|---|---|---|---|---|---|---|
| 5.1 | Optical Fiber Communication | Theory | 4 – 0 | 4 | Theory 40 | Theory 60 (3 hrs) | 100 |
| 5.5 | Optical Fiber Communication (Lab) | Practical | 0 – 6 | 3 | Practical 60 | Practical 40 (3 hrs) | 100 |
| Optical Fiber Communication Total | 7 | 100 | 100 | 200 | |||
Units at a Glance
| Unit | Topic | Periods | Marks Share |
|---|---|---|---|
| 1 | Introduction | 8 | 16% |
| 2 | Optical Fiber | 12 | 21% |
| 3 | Fiber Materials, Connectors, Coupler, Splicer and Losses | 12 | 21% |
| 4 | Optical Sources and Detectors | 12 | 21% |
| 5 | Optical Amplifiers and Its Type | 12 | 21% |
Complete Practicals List
This is the complete list of practicals from the official syllabus.
- To identify and use various components and tools used in optical fiber communication.
- To view and draw the structure of an optical fiber and cable.
- To observe the Total Internal Reflection (TIR) and Light transmission.
- To calculate NA of given optical fiber.
- To set up fiber optic analog link.
- To set up fiber optic digital link.
- Identify various layers & parts of an optical fiber cable.
- Measure bending losses of the given fiber optic cable.
- Plot the characteristics of optical source & detector.
- To connect a fiber with connector at both ends.
- To observe and measure the splice or connector loss.
- To splice the available optical fiber.
- To measure attenuation in optical fiber.
- To do power budgeting of an optical fiber link.
- To determine the position of fault in optical fiber link.
Reference Books
As listed in the syllabus:
- Fiber Optic Communication Keiser, Gerd McGraw Hill New Delhi.
- Optical Fiber communications principles & Practices Senior, John M. Pearson Education Ltd., New Delhi.
- Govind P. Agrawal, “Fiber Optic Communication Systems”, John Wiley, 3rd Edition, 2004.
Frequently Asked Questions
How many marks is Optical Fiber Communication worth in the 5th semester?
Optical Fiber Communication (5.1) is 100 marks; Optical Fiber Communication (Lab) (5.5) is 100 marks. Total: 200 marks, 7 credits. The full scheme table is in the Complete Syllabus section above.
Which units carry the most weightage in Optical Fiber Communication?
Optical Sources and Detectors and Optical Fiber and Optical Amplifiers and Its Type and Fiber Materials, Connectors, Coupler, Splicer and Losses, 21% each. The full unit-wise weightage table is in the Complete Syllabus section above.
What practical work is there in Optical Fiber Communication?
15 practicals/experiments, including: To identify and use various components and tools used in optical fiber communication.; To view and draw the structure of an optical fiber and cable.; To observe the Total Internal Reflection (TIR) and Light transmission.. The complete list is in the Complete Syllabus section above.
Which books should I refer to for Optical Fiber Communication?
The syllabus lists Fiber Optic Communication Keiser, Gerd McGraw Hill New Delhi., and Optical Fiber communications principles & Practices Senior, John M. Pearson Education Ltd., New Delhi., among others. The full list is in the Complete Syllabus section above.
Is Optical Fiber Communication a theory subject or a practical subject?
It is assessed as practical and theory — see the examination scheme in the Complete Syllabus section above.
How can I download the Optical Fiber Communication syllabus PDF?
The PDF is free to download — use the download link in the Download section below. It is prepared by KAMALDNP Academy from the official BTEUP syllabus.
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Download the Optical Fiber Communication Syllabus PDF
Download the complete Optical Fiber Communication syllabus PDF below — prepared by KAMALDNP Academy, with the full topic list, practicals and reference books.
Download the Optical Fiber Communication Syllabus PDF
Source: BTEUP 3rd Year curriculum (folder2627), approved in C.D.C. meeting held on 16.07.2026. Topic lists follow the official syllabus; short explanations are the author's own plain-English summaries, not syllabus text. Please confirm with your own polytechnic for any local changes.
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