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By, Xavier Prathap.W I BSc, MPC.                    1
LASERLASER is an acronym for ,   Light Amplification by Stimulated         Emission of Radiation                          ...
History of LASER   In 1917, Albert Einstein first theorized the    possibility of Lasers.   The first working laser was ...
Spontaneous Emission Excited atoms normally drop to Lower  Energy Level Spontaneously Photons are uncorrelated and unide...
Stimulated Emission Excited atoms  are forced to  emit by another  matching  photon Photons are  correlated and  identic...
Principle of Laser    Population Inversion.     The phenomenon of exciting the atoms, so     that, there are more number ...
Lasing Action Diagram           Excited State                                   Spontaneous                               ...
Ruby Laser             8
Properties of Laser Laser light is highly monochromatic. Laser light is extremely directional. Laser light is spatially...
Applications of LasersLaser are used,In optical communication.In guiding missiles to desired destinations.To scan infor...
THANK YOU            11
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Laser

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Laser

  1. 1. By, Xavier Prathap.W I BSc, MPC. 1
  2. 2. LASERLASER is an acronym for , Light Amplification by Stimulated Emission of Radiation 2
  3. 3. History of LASER In 1917, Albert Einstein first theorized the possibility of Lasers. The first working laser was created by Theodore Maiman on May 16th, 1960 at the Hughes Research Laboratory in California. 3
  4. 4. Spontaneous Emission Excited atoms normally drop to Lower Energy Level Spontaneously Photons are uncorrelated and unidentical Incoherent light 4
  5. 5. Stimulated Emission Excited atoms are forced to emit by another matching photon Photons are correlated and identical Coherent light 5
  6. 6. Principle of Laser  Population Inversion. The phenomenon of exciting the atoms, so that, there are more number of atoms in the Higher Energy Level than in the Lower Energy Level  Optical Pumping The method of achieving Population Inversion is known as Pumping. And, one of the types of pumping in known as Optical Pumping. 6
  7. 7. Lasing Action Diagram Excited State Spontaneous Energy Emission Metastable StateOpticalPumping Stimulated Emission of Radiation Ground State 7
  8. 8. Ruby Laser 8
  9. 9. Properties of Laser Laser light is highly monochromatic. Laser light is extremely directional. Laser light is spatially coherent. Laser light is extremely intense and bright. 9
  10. 10. Applications of LasersLaser are used,In optical communication.In guiding missiles to desired destinations.To scan information on bar codes.To make holograms.In making Integrated Circuits.In CD playersIn surgery.In industries to cut and weld strong metals.To measure distances very accurately.To store and view 3D informations. 10
  11. 11. THANK YOU 11

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