A team of researcher at Caltech has developed a new laser which has enough potential to increase the rate of data transmission in the optical-fiber network and replace the 40 years old fiber optic communications system.The study was published the week of February 10–14 in the online edition of the Proceedings of the National Academy of Sciences.
Light is capable of carrying vast amounts of information, approximately 10,000 times more bandwidth than microwaves.This new laser is noticeable due to its high spectral purity, spectral purity means close to operates on a single frequency.The closer (narrower) the tone, the more information laser light can carry and allows data to travel with the faster speed, so it is called faster internet.
Nowadays worldwide's optical-fiber network is known as the distributed-feedback semiconductor (S-DFB) laser.This distributed-feedback semiconductor (S-DFB) technology developed in the mid 1970s in Yariv's research group.The S-DFB laser manages to attain such spectral purity by using a nanoscale corrugation within the laser's structure that acts like a internal filter, discriminating against spurious "noisy" waves that effecting or making bad the ideal wave frequency.
The old S-DFB laser consists of continuous crystalline layers of materials called III-V semiconductors which absorb light causing a damage of spectral purity.The new laser technology still using the III-V material which stores the light in a layer of silicon, silicon does not absorb light.This new high spectral purity allows the laser to achieve range of frequencies Which is 20 times narrower the S-DFB laser.
Yariv and his team trying hard to improve laser technology and believe that the new laser will certainly improve the optical-fiber networking system.
Share this on your favourite network
Posts
0 comments:
Post a Comment