Latest Laser will make Internet run faster

• Posted by T Ghosh February 21, 2014 - Filed in Technology - #laser  ##internet  - 1,962 views

   

   A new laser has been developed which has the potential to increment  by orders of magnitude

  the  data transmission flow rate in the optical-fibre network  OFC cable system which is the

  main connectivity and is  the backbone of the internet.

  
   California Institute of Technology (Caltech) has hit the bull's eys in developing such a system .

   

  
  The Light is such a powerful element and can carry huje  amounts of information which is

   almost a 10,000 times more bandwidth than microwaves which is  the earlier carrier of long-

  distance communications. 
  
  

   

  Here the laser light is spectrally pure  and  to a single frequency . The purer the tone, the more

  information it can carry, and researchers have been trying to develop a laser that comes as

   

  close as possible to emitting just one frequency. 

  
   Distributed-feedback semiconductor (S-DFB) laser, developed in mid-1970s, are still used today.
  
  The S-DFB laser's unusual longevity in optical communications stemmed from its, at the time,

  unparallelled spectral purity - the degree to which the light emitted matched a single

  frequency. 
  
  It can  attain clarity  by using a nanoscale corrugation within the laser's structure that acts like a filter.