1.
Presented by,
C.PRIYANKA KARANCY,
M.TECH,CCE

2.
 Light Amplification by Stimulated Emission of
Radiation.
 A laser is a device that emits light through a
process of light amplification based on
the stimulated emission of electromagnetic
radiation.

3.
 Laser light has three characteristics that
are different from ordinary light.
1. Directional property
2. Monochromatic property.
3. Coherent property.

4.
 it is in the form of one wavelength,

5.
 Laser light is emitted as a relatively
narrow beam in a specific direction.

6.
 The light from a laser is said to
be coherent, which means the wavelengths
of the laser light are in phase in space and
time.

7.
 The light moves through the medium
between the two mirrors that reflect the
light back and forth between them.
 One of the mirrors, however, only partially
reflects the light, allowing some to escape.
 The escaping light makes up the laser beam.

8.
 Slope efficiency is the important property of
laser.
 The slope efficiency is the slope of this line.
 Slope efficiency can similarly be defined in
terms of output and input energies instead of
powers.
 This makes it applicable to pulsed lasers.

9.
 Less expensive.
 More compact.
 Welding of complicated joint geometry.
 Low heat application, therefore minor
changes in microstructure
 Low thermal distortion.

10.
 Have shorter coherent length.
 Laser equipment is expensive.

11.
 Laser printers,
 Laser fax machines
 Supermarket bar code readers all use diode
lasers
 Eye surgery.
 Military application.

12.
 PI characteristic of laser diode.
 Plotting the current in x-axis.
 Power in the Y-axis.

13.
Thank you

14.
 priyanka3karancy@gmail.com