News classification
Contact us
- Add: Room 27th,Hongji Road,Longdong District,Longgang,shenzhen
- Tel: 0755-89361020
- Fax: 0755-89361020
- Email: 331829534@qq.com
Optical fiber technology emerge in endlessly
According to the related media reports, researchers at the university of Southampton, UK, produced a new type of optical fiber, it can to 99.7% of the speed of light to transmit data. Researchers using this new type of optical fiber for 73.7 -tbps data transmission speed is equivalent to about 10 -tbps, 49 gb than today's most advanced optical fibre to 1000 times faster, and delay rate also greatly reduced.
Optical fiber broadband industry is the fastest-growing in the current information industry, one of the largest industrial development space. Accelerate the construction of optical fiber broadband network can promote the network infrastructure upgrades, improve the independent innovation ability, the related industry development, to cope with the financial crisis, achieve steady growth, structural adjustment, ensuring people's well-being, promote the stable and to promote the competitiveness of the country's long-term has important strategic significance. And the development of optical fiber transmission for security industry, also has progressive significance.
It is understood that the speed of light in a vacuum for 299792458 m/s, but in other medium propagation speed is usually much slower. Made of quartz glass in conventional optical fiber, the speed will slow down 31%. In fact, the transmission speed faster than the glass instead of air, is also for this reason, researchers at the university of Southampton, use an almost completely fill the air of hollow optical fiber transmission.
The researchers thorough improvement on the design of hollow overcame this problem, used a photonic band gap edge. The new design can realize low loss (3.5 dB/km), wide bandwidth (160 nm) and far better delay rate of the conventional optical fiber, so as to make the light and the data transmission rate of 31%.
Fiber optic monitoring application
Since the 21st century, with the digital signal processing (DSP) technology and the development of the optical fiber sensing technology, a new security technology: fiber optic monitoring technology, the global attention, is widely used and rapidly in Europe and the United States and other countries. The technology and the existing various based on traditional electromagnetic effect, that feature point layout of monitoring technology, it USES fiber as the sensing signal into monitoring and signal transmission and external setting device, through the optical fiber, a comprehensive sensor network implementation area, form (linear, plane form, space, regional form) pick vibration detection and voice. The monitoring technology has prominent features include:
Filled with concealment, easy to deploy. Optical fiber itself is the linear flexible medium, which can be hidden, and non destructive to buildings arranged in a variety of environment and the regional, flexible layout freedom, can fully replenish wenbo security system of perimeter alarm, channel, alarm and alarm when space three review of defence. Its concealment also greatly reduces the invasion of personnel vigilance against the security equipment.
Filled with prominent prevent destructive. Because fiber with the method of the hidden layout, technical principle also has a confidentiality, unlike traditional technology such as cameras and infrared hindered line is well known, easy to identify, avoid and destruction; At the same time, the optical fiber probe is no electromagnetic radiation, more resistance to electromagnetic interference, based on the electromagnetic and the metal effect on normal detection device is difficult to find optical fiber probe, as a result, the possibility of fiber optic monitoring technology is to dodge and damaged is extremely low, prevent destructive.
Filled fiber with WuZhongJi long transmission distance, small dependence on energy, the whole monitoring area layout of sensor network no need power supply, thus greatly reduces the electronic devices may be of wood or other material structure constitute a safety hazard risk. And the scene without power supply system also don't have to worry about security system paralysis caused by switch power on.
Optical fiber broadband industry is the fastest-growing in the current information industry, one of the largest industrial development space. Accelerate the construction of optical fiber broadband network can promote the network infrastructure upgrades, improve the independent innovation ability, the related industry development, to cope with the financial crisis, achieve steady growth, structural adjustment, ensuring people's well-being, promote the stable and to promote the competitiveness of the country's long-term has important strategic significance. And handed to cardiac optical fiber is different from general linear or physical block type detection system is easy to be evaded the lack of gap, optical fiber sensing network through three-dimensional cooperative awareness, like a huge neural network, voice picked up from the ground, underground, and space, to the change to the accurate perception of the whole layout area and ring, a full range of intrusion detection for environmental changes, and through the analysis and pattern recognition, intelligent behavior accurately carries on the analysis judgment, rule out environmental impact would be likely to produce false positives, guarantee system to make high accuracy to inform and report to the police.
Filled fiber thin transparent, to show the optical fiber attached to the small items, or concealed buried under the booth, could be the most direct to protection of cultural relics, fiber optic cable from already the physical and chemical properties, also won't bring any damage to cultural relics, a foolproof security monitoring purposes.
Cardiac distributed optical fiber itself can be a long continuous real-time monitoring of environmental temperature, at the same time as the safety monitoring of optical fiber can be temperature alarm monitoring. When the temperature exceeds the preservation conditions surrounding the cultural relics, the system can alarm processing.
Cardiac optical fiber itself is non-metallic passive components, not afraid of lightning, lightning, in the natural environment, not corrosion, does not fear the rain and snow, and even can be used in damp and water environment. Optical fiber sensor without energy dissipation at the same time, will not be a heat source, suitable for flammable and explosive place, meet the requirements of high level of fire prevention. Very suitable for wenbo such high security level, there are special security requirements of important place.
Fiber filled voice monitor is not affected by all kinds of electromagnetic interference, won't produce electronic eavesdropping equipment often the current noise and signal, can high fidelity without time delay of synchronous reduction to monitor the scene of the rustling.
Filled fiber optic monitoring technology and the existing video, infrared and so on various system conflict each other, which can realize compatible with, the realization of the real touch, hear and see.
At present, the domestic has a series of fiber optic monitoring technology. Around the year 2000 has a scientific research colleges and universities such as fudan university began to dynamic monitoring technology research and development in optical fiber, optical fiber began in 2005 put into trial class detection alarm products. Dynamic sensing technology based on optical fiber and optical fiber with intrusion detection, optical fiber vibration voice surveillance, security monitoring and fiber optical fiber links pipeline safety monitoring, etc. Series of products, with outstanding characteristics.
The system requires integrated optoelectronics, materials, physics, electronics, communications, computers, and other disciplines, generally need to have strong technical background of the scientific research institutions led research and development. At present by the completely independent research and development, technology belongs to the original route of the technology has filled the domestic blank, and fully catch up with the foreign similar technology. A number of technological achievements both in theory and technology reached the international leading level. State ministries, department of science and technology in some provinces, including some industry competent authorities have begun to for the further deepening and application of the technology. During the Olympic Games and world expo has successfully put into use the technology products.