Laser Technology

• Laser stands for light amplification of stimulated emission of radiation. 
• It was invented in 1960 by Theodore Maiman at Hughes Research Laboratories. 
• This invention has lead us to many technological applications like optical disk drives, laser cutting, DNA sequencing, weapons, barcode scanners, defense systems, etc. 
• The fact which differ lasers from other sources of light is because of their coherence.  
• In 1951, Joseph Weber proposed an idea of using stimulated emission to make microwave amplifier. In 1955, Charles Hard Townes builds the first microwave amplifier which was based on the Joseph’s paper. 
• This microwave amplifier worked on the same principles of lasers. However the theoretical foundations of lasers were established in 1917 by Albert Einstein via re-derivation of Max Plank’s law of radiations.