Laser & Optical Fiber

Paper Code: 
PHY-313
Credits: 
03
Contact Hours: 
45.00
Max. Marks: 
100.00
Objective: 

This course will enable the students to –

This paper introduces the principles of lasers. The use of lasers in different areas of physics, and spectroscopy with lasers compared to other forms of spectroscopy, optical fibers and fiber optic communication. The student learns principles of LASER and its generation to a greater depth and applications of LASER in different fields, including scientific experiments. Further the study of Fibre optics helps them to learn the basics of optical communications, replacing the earlier methods of electronic communication all over the world. 

Course Outcomes (COs):  

Course

Learning outcome (at course level)

Learning and teaching strategies

Assessment Strategies

Paper Code

Paper Title

PHY 313

Laser & Optical Fiber (Theory)

This course will enable the students to –

CO76: Understanding above the Laser, Optical Resonators, Three level and four level systems. 

 

CO77: A brief idea about Types of LASER and output modulation methods to use in various Principles and applications.

 

CO78: Understanding above Application of laser and Holography to solve problems. 

 

CO79: Learn about the Basic characteristics of optical fiber, classification of fibers and fabrication techniques of fibers to solve problems.

 

CO80: Knowledge of Optical Fiber Communication used in various systems and applications. 

 

CO81: The student acquires the required knowledge to work with LASERs for various scientific experiments and use of optical fiber in communications. 

 

Approach in teaching:

Interactive Lectures, Discussion, Tutorials, Demonstration, problem solving in tutorials.

 

 

Learning activities for the students:

 

Self learning assignments, Effective questions, Seminar presentation. Additional learning through online Videos and MOOCs Courses. 

Continuous assessment, Semester end examinations, Quiz, Assignments, Presentation, Individual and group projects Class test, Semester end examinations, Quiz, Solving problems, Assignments, Presentations

 

9.00
Unit I: 
LASER Physics:
Basic Principle of Laser, Einstein Coefficients, condition for light amplification, Population Inversion, Threshold Condition, Line shape function, Optical Resonators, Three level and four level systems. 
 
9.00
Unit II: 
Types of LASER and output modulation methods:
Solid State lasers, Ruby and Nd-YAG Laser, Gas lasers, He-Ne and Co2 lasers, semiconductor lasers, Heterojunction lasers, Liquid Dye lasers, Q switching and mode locking.
 
9.00
Unit III: 
Applications of LASER:
Application of laser in industry, cutting and welding, Drilling, surface Hardening, Medical applications, laser as diagnostic and therapeutic tool, Holography, Theory of recording and reconstruction, application of Holography. 
 
9.00
Unit IV: 
Optic fiber:
Basic characteristics of optical fiber, acceptance angle, numerical aperture, propagation of light through optical fiber, theory of mode formation, classification of fibers, step index and graded index fibers, single mode and multi mode fibers , losses in fibers, fabrication techniques of fibers. 
 
9.00
Unit V: 
Optical Fiber Communication:
Source and detectors for Optical Fiber communication, Laser and LED, Analog and digital modulation methods, Principle of optical detection, pin and APD photodetectors, Noise, Design consideration of a Optical Fiber communication system. 
 
 
 
 
 
 

BOOKS RECOMMENDED:

  • “Laser theory and applications” by K. Thyagarajan and AjoyGhatak, Cambridge University Press, 1999.
  • “An Introduction to laser: Theory and Applications” by M. N. Avadhanulu, S. Chand and Co., New Delhi 2001.
  • “Introduction to Fiber optics” by K. Thyagarajan and AjoyGhatak, Cambridge University Press, 1999.
  • “Optical Fiber communications” by John M. Senior, Cambridge University Press, 1996
  • “Fiber-Optic communication systems”, GovindP. Agrawal, John-Willey & Sons.

 

References: 
 
 
Academic Year: 
2020-2021
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