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Topic : Laser And it’s Applications

Topic : Laser And it’s Applications. Created by :- Het Mehta (34) Ankit Patel (42) Amit Tiwary (03) Nirav Patel (45) Bhavesh Nakum (38) . Definition Of LASER

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Topic : Laser And it’s Applications

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  1. Topic : Laser And it’s Applications Created by :- Het Mehta (34) Ankit Patel (42) Amit Tiwary(03) Nirav Patel (45) Bhavesh Nakum (38)

  2. Definition Of LASER • A laser is a device that generates light by a process called STIMULATED EMISSION. • The acronym LASER stands for Light Amplification by Stimulated Emission of Radiation. • Semiconducting lasers are multilayer semiconductor devices that generates a coherent beam of monochromatic light by laser action. A coherent beam resulted which all of the photons are in phase.

  3. Types of LASER • Gas lasers • Chemical lasers • Dye lasers • Metal-vapor lasers • Solid-state lasers • Semiconductor lasers • Some Other types of lasers

  4. ApplicationsOfLaser • Scientific • Spectroscopy • Photochemistry • Nuclear fusion • Military • Directly as an energy weapon • Medical • Industrial and commercia

  5. The detection of the binary data stored in the form of pits on the compact disc is done with the use of a semiconductor laser. The laser is focused to a diameter of about 0.8 mm at the bottom of the disc, but is further focused to about 1.7 micrometers as it passes through the clear plastic substrate to strike the reflective layer. The reflected laser will be detected by a photodiode. Moral of the story: without optoelectronics there will no CD player!

  6. Medical • Destroying tumours • Reattaching damaged retinas • Unblocking arteries and heart valves • Cutting and sealing nerves in neurosurgery • Correcting myopia in cornea operations

  7. Welding • Cutting and drilling metals • Measuring distances

  8. Optical fibre communication • Laser guided “smart” weapons

  9. photograph illuminating beam 2D representation of image (no depth) object photographic plate eye reference beam beam expander illuminating beam reconstruction beam LASER hologram BS object reconstructed image Hologram (photographic plate) diffracted reference beam eye Holography RECORDING READING / RECONSTRUCTING Photography - record electric field intensity of light scattered by object Holography - record electric field intensity and phase

  10. Femtosecond laser surgery of cornea - 2 Lenticle removal using Femtosecond LASIK

  11. 1kW Nd:YAG cutting metal sheet

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