Surgery and medicine 

  • Laser beams are used as the surgical tool for “welding” detached retinas. 
  • The narrow intense beam of the laser can be used to destroy tissue in a localized area. The organelles with a living cell have been destroyed by using the laser to study how the absence of that organelles affects the behaviour of the cell. 
  • Finely focused the beam of the laser has been used to destroy the cancerous and pre-cancerous cell. 
  • The heat of the laser seals off capillaries and lymph vessels to prevent the spread of the disease. 
  • The laser is used to breaking the stone in human kidney. 
  • It is used to develop hidden fingerprints. 
  • It is used to destroy the tumour. 

Industry, and agriculture 

  • The intense heat produced in a small area by a laser beam is also used for welding and matching metals and for drilling tiny holes in the hard material. 
  • The precise straightness of a laser beam is also useful to surveyors for lining up equipment especially in inaccessible locations. 
  • It is the potential energy source for inducing fusion reaction. 
  • It can be used for telecommunication along optical fibres. 
  • The laser beam can be used to generate three-dimensional images of objects in a process called holography. 
  •  A laser beam is used to drill small (tiny) holes in hard metals. 
  • It is used for welding in electronic circuits. 
  • It is used to induce nuclear fission reaction. 
  • It is used to produce three-dimensional images. 
  • It is used as a rangefinder. 
  • It is used for the purposes of photographic recording of the output of a computer. 
  • It is used to develop hidden fingerprints. 

What is the uniqueness of the laser for the propagation? 

Light Amplification by Stimulated Emission of Radiation 

Flexibility, Precision, Repeatability, Speed, Automation, Quality, Contactless Cutting, Versatility. 

How does a laser works? 

  •  A small pulse of laser light “tuned” to the excited electrons’ energy is directed through the glass slabs. This laser pulse stimulates the electrons to drop to their lower, or ground, energy states and emit a laser photon of the same wavelength. 

Safety/Alert of Laser Processes 

  • Improperly used laser devices are potentially dangerous. Effects can range from mild skin burns to irreversible injury to the skin and eye. The biological damage caused by lasers is produced through thermal, acoustical, and photochemical processes. 
  • Why lasers can cause eye damage. A laser’s light is concentrated into a narrow beam. … The power density from a 1-milliwatt laser, focused to a point, is brighter than the equivalent area of the sun’s surface. This can cause a detectable change (injury) to the retina if the laser stays in one spot for a few seconds. 
  • Redness and irritation. Laser hair removal damages the follicles of the targeted hairs. … 
  • Crusting. Some people may experience skin crusting in the affected area. … 
  • Changes in skin colour. Some people may notice minor colour changes to the treated area of skin. … 
  • Eye injury. … 
  • Risk of skin infection. 
  • Laser cutting demands high power consumption as compared to other techniques. 
  • The laser beam is very delicate to handle. … 
  • The laser beam is harmful if it meets human workers. … 
  • Laser cutting is still not capable of cutting thick metals. 
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