EI2024 Fibre Optics and laser Instruments lecture notes for EEE - Sixth (6th) Semester
EI2024 Lecture Notes
UNIT I OPTICAL FIBRES AND THEIR PROPERTIES
Principles of light propagation through a fibre - Different types of fibres and their properties, fibre
characteristics – Absorption losses – Scattering losses – Dispersion – Connectors and splicers –
Fibre termination – Optical sources – Optical detectors.
UNIT II INDUSTRIAL APPLICATION OF OPTICAL FIBRES
Fibre optic sensors – Fibre optic instrumentation system – Different types of modulators –
Interferometric method of measurement of length – Moire fringes – Measurement of pressure,
temperature, current, voltage, liquid level and strain.
UNIT III LASER FUNDAMENTALS
Fundamental characteristics of lasers – Three level and four level lasers – Properties of laser –
Laser modes – Resonator configuration – Q-switching and mode locking – Cavity damping – Types
of lasers – Gas lasers, solid lasers, liquid lasers, semiconductor lasers.
UNIT IV INDUSTRIAL APPLICATION OF LASERS
Laser for measurement of distance, length, velocity, acceleration, current,
voltage and Atmospheric effect – Material processing – Laser heating, welding,
melting and trimming of material – Removal and vaporization.
UNIT V HOLOGRAM AND MEDICAL APPLICATIONS
Holography – Basic principle - Methods – Holographic interferometry and application, Holography for
non-destructive testing – Holographic components – Medical applications of lasers, laser and tissue
interactive – Laser instruments for surgery, removal of tumors of vocal cards, brain surgery, plastic
surgery, gynaecology and oncology.
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