Since the inception of lightwave optical communication with fiber, the focus has been on the technology for long-distance telecommunication applications. And that is why single mode glass optical fiber has been the most preferred channels for such applications.Because of the ever-increasing need for more bandwidth, the data communication market has risen to the forefront in fiber optic communication. After several rounds of competition with other technologies, Ethernet is obviously the winner for LAN networks.Silica-based multimode fiber is adopted to provide an inexpensive optical link with a combination of transceivers based on Vertical Cavity Surface-Emitting Laser (VCSELs).However it is not the best solution to distribute such a silica-based optical fiber even in premises and home networks or interconnections.Why? Plastic optical fiber (POF), with its its large core, has been expected to be the office and home network media. Plastic optical fiber’s large core allows the use of cheap injection-molded plastic connectors which can significantly lower the total link cost.But POF has its own problems. The most important obstacle is plastic fiber’s high signal loss (attenuation). PMMA has been used as the light guiding core for commercially available step-index POF and PMMA’s attenuation is about 100 dB/km. This high attenuation significantly limits POF’s applications in data communication applications of more than 100m.Here is the good news though. Developers have found that PF amorphous polymer based gradient-index plastic optical fibers eliminate the attenuation problem with PMMA based plastic fiber. They have developed PF-polymer based Gradient-Index (GI) POF with attenuation level of only 10 dB/km. Based on theoretical calculation, PF-polymer based GI POF can achieve similar level of attenuation as silica-based glass fiber of 0.3dB/km.With a optimized refractive-index profile in the PF-polymer based GI POF, more than 10Gb/s data transmission speed can be achieved over 1km. This is the metrics of PF-polymer’s low intrinsic loss and low material dispersion.Combined with this theoretically possible high bandwidth and low total link cost, PF-Polymer based gradient-index plastic optical fiber has a huge potential in fiber optic data communication applications.
One of the most asked questions is what are data centres? Data centres are artificially environment controlled facilities that house computer systems, severs, large storage devices, backup power supplies, hi-tech data communication systems and security devices. They are used to provide a central place where businesses can store their information and host their sites. It is normally used as a central part where data communication can be monitored and websites can be hosted and online data stored. It does this by ensuring uninterrupted data traffic which is not affected by power blackouts and malfunctioned stations.This is very important especially today when almost everything is done online through an endless number of websites. Business, money transfer, messaging, interaction and virtually everything is done online nowadays so there must be a reliable store and communication center that controls all this. That is why we have these centres. An organization can own its own center though it is very expensive to maintain one so many of them end up hiring other centres to host their sites and manage their information.Their main function is to protect and maintain information belonging to a company. They do this by using the latest state of the art security systems so as to ensure that no one illegally accesses that information.It is also responsible for the running and maintenance of the software applications that run the company. This ensures that the data stored is not lost or does not get corrupted since the application stores employee details, the financial records and virtually controls everything in the company. It also monitors user activities and transactions and keeps their records for future reference.It is important for the company to know how the center works since it is a very vital part of the company. An efficient and economical one reduces the expenses that the company incurs therefore a properly running center increases the profit and value a company.So the organization must invest a lot of resources to ensure that the hardware and software is up to date and that the security is sufficient. The cost of maintaining it might be viewed as being too much but that is not the case. This is because it would cost the company even more if its whole system failed as compared to what it costs to maintain it.The center requires a lot of power to operate and cannot afford to go off at any time therefore the need for there to be power backup systems. The use of so much power leads to production of so much heat. So the center needs to be properly air conditioned to ensure that the heat does not destroy the whole system.Finally they cannot operate without personnel. The company must employ computer and telecommunication experts who are trained on how to manage and operate such centres. The personnel offer 24 hour surveillance over the whole system to ensure that it operates in the best condition. So I guess that answers the question, what are data centres?