a presentation on atomic laser.

1. ATOMIC LASER
Made by:- KUNWAR SINGH
1300331015
EC (IIISEM)
(a type of gas laser)

2.  One of the type of gas laser.
 Rarefied gases are active media.
 Excited by an electric discharge.
 Emits matter wave.
 To excite atoms, sources with sharp wavelength are
required.
 Ex: He-Ne laser

3.  He-Ne laser is an atomic laser.
 Employs 4-level pumping scheme.
 Helium-Neon laser was one of the first
laser ever developed.
 Active medium:
10 part of He to
1 part Ne
 operates in continuous wave mode.

4. Fig: schematic of he-ne laser.

5.  Consist of a glass discharge tube.
 Filled with a mixture of He-Ne .
 Electrodes are connected with high power supply.
 Neon are the active centres and have the energy level
suitable for laser transition.
 While He atoms help efficient excitation of Ne atoms.
Description:

6. Working:
• High dc voltage ionizes the gas to conduct electricity.
• e- transfer K.E. to atom by inelastic collision.
• Atoms of kind A are initially excited by e- impact.
• And they in turn transfer their energy to atoms of kind B
which are the actual active centre.

7.  Applications:
The fields in which He-Ne laser is applied are given-
 Interferometry
 Laser printing
 Bar code reading
 As pointing and directional reference beam

8. THANK YOU !

9. ANY QUESTION ?