A laser is a device that generates an intense beam of coherent and monochromatic light through the process of stimulated emission of radiation. It consists of a lasing medium, an energy source to excite the medium, and an optical resonator. There are two main types of emission in a laser - stimulated emission, which is the desired process, and spontaneous emission. Lasers find many medical applications such as removing tumors, kidney stones, and tattoos as well as improving vision.

1. LASER
SIR SYED UNIVERSITY OF ENGINEERING AND
TECHNOLOGY
SYED HAMMAD
AKHTER
2012-BM-071
PRESENTED TO
ENGR. FAHAD
AKBER

2. Light Amplification by Stimulated Emission of Radiation
A LASER is a device that generate an intense beam of
coherent monochromatic light.
Widely used in Opthamlogoy and neurology
LASER
 Spatial ( same phase)
 Temporal Coherence
 Monochromatic wavelength
 Highly directional
 High density energy
 Tunable and finely focused
CHARACTERISTIC
S
COMPONENTS
 Medium
 External energy source
 Optical resonator

3. Main components

4. TYPES OF
LASER
Types of Emission:
There are two types of Emission;
Stimulated Emission:
It is the process by which an incoming photon of a specific frequency can
interact with an excited atomic electron.
Spontaneous Emission:
A Quantum effect causing the spontaneous decay of excited states of
atoms and ions.

5. •Shrink and destroy of Tumor
•Removal of Kidney Stone
•Remove parts of prostate
•Repair detached retina
•Improve vision
•In dermatology (tattoo removal, hair
removal)
MEDICAL APPLICATION OF
LASER