Lasers and Optical Fibers Experiment

    Uri Arieli, Instructor of the lasers and optical fibers experiment

 Shenkar Physics Building

             Room 322

uriarieli14@gmail.com   

03-6405692

 

·         The experiment is performed at Lab 3, Shenkar Physics building, Room 106.

 

Contents

  1. Introduction
  2. Topics of the experiment
  3. How to prepare for the experiment?
  4. The experimental schedule
  5. Literature
  6. Links

 

Introduction

The concept of optical communications goes way back into history. By 1910, Hondros and Debye had developed a theory of dielectric waveguides. However the breakthrough which made the optical fiber waveguide the leading contender as the transmission medium of choice for current and future communications systems was triggered by three events. The first was the demonstration of the first operating laser in 1960. The second was the theoretical work of Charls K. and George A.H from 1966 indicating the high potential of optical fibers communications systems, and the third was the development of the diode laser.

Optical fibers are also used in sensor applications, where the high sensitivity, low loss, and electromagnetic interference immunity of the fibers can be exploited.

 

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Topics of the experiment

  • Fiber numerical aperture and critical acceptance angle
  • Temperature sensing via the Mach-Zhender interferometer
  • Diode lasers
  • Laser temporal coherence (using the Michelson interferometer)

 

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How to prepare for the experiment?

  1. Read the experiment's instructions.
  2. Read the Projects in Fiber-Optics Handbook, Ch. 0,1,10
  3. Read the Coherence and Fringes article, (beginning until 5.1.2, and what's needed to understand example 5.1)
  4. Read the Projects in Single Mode Fibers 1 Handbook, Ch. 3
  5. Learn the experiment's schedule.
  6. Make sure you understand the experimental technique.
  7. Answer the preparation questions (in the experiment's instructions). Read the literature needed to answer these questions (sources appear on each question)
  8. Read the Lab's safety instructions, Section 2.1.

 

 

The experimental schedule

*It is recommended to bring a laptop for data analysis during the experiment.

  1. Written exam - Approximately one hour (closed material)
  2. Laser safety and instrument overview
  3. Fiber cleaving
  4. Fiber entrance numerical aperture measurement
  5. Mach-Zhender interferometer setup and temperature measurement
  6. Diode laser characterization
  7. Michelson interferometer calibration and coherence length measurement

 

 

Literature

  1. Newport Inc. Projects in Fiber-Optics Handbook, Ch. 0,1,10
  2. T.D. Milster and N.A. Beaudry, Coherence and Fringes article, (beginning until 5.1.2, and what's needed to understand example 5.1)
  3. Newport Inc. Projects in Single Mode Fibers 1 Handbook, Ch. 3
  4. A. Yariv, Optical Electronics, 535.15 YAR
  5. A.W. Snyder and J.D. Love , Optical Waveguide Theory

 

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Links

  1. How to write a report
  2. Fourier Filtering Tool for Matlab (Tip 5.4 in experiment 2): http://www.mathworks.com/matlabcentral/fileexchange/25017-fft-filter-clean-your-signals-and-display-results-
  3. Experiment's instructions
  4. Mach-Zender MATLAB Simulation (optional)

 

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