LASE
R
Light Amplification by Stimulated Emission of Radiation
, Importance of LASER
Applications
Physics
Working principle and fabrication of LASER
Types of LASERs
,Important Characteristics of LASER
LASER Light Ordinary Light
Monochromatic: Single Polychromatic: Long range of
wavelength wavelengths
Coherent: radiations are in Incoherent: radiations are out
phase, same frequency, of phase
constant amplitude
Unidirectional Divergent
High intense beam Intensity decreases with
distance
Stimulated emission Spontaneous emission
, Why to Study LASER?
(Applications for Society)
Communication: Fiber-optic communication
Research: Spectroscopy, laser ablation, laser annealing, fluorescence microscopy, metrology
(determine the distance of moon).
Medicine: Bloodless surgery, laser healing, surgical treatment, kidney stone treatment, eye surgery,
dentistry
Industry: Cutting, welding, material heat treatment etc.
Law enforcement: Fingerprint detection in the forensic identification field
Entertainment: Laser lighting displays, Laser light shows
Military: Marking targets, missile defence, alternative to radar
R
Light Amplification by Stimulated Emission of Radiation
, Importance of LASER
Applications
Physics
Working principle and fabrication of LASER
Types of LASERs
,Important Characteristics of LASER
LASER Light Ordinary Light
Monochromatic: Single Polychromatic: Long range of
wavelength wavelengths
Coherent: radiations are in Incoherent: radiations are out
phase, same frequency, of phase
constant amplitude
Unidirectional Divergent
High intense beam Intensity decreases with
distance
Stimulated emission Spontaneous emission
, Why to Study LASER?
(Applications for Society)
Communication: Fiber-optic communication
Research: Spectroscopy, laser ablation, laser annealing, fluorescence microscopy, metrology
(determine the distance of moon).
Medicine: Bloodless surgery, laser healing, surgical treatment, kidney stone treatment, eye surgery,
dentistry
Industry: Cutting, welding, material heat treatment etc.
Law enforcement: Fingerprint detection in the forensic identification field
Entertainment: Laser lighting displays, Laser light shows
Military: Marking targets, missile defence, alternative to radar
