Optical fiber transmission boosts the development of video surveillance

The optical fiber broadband industry is one of the fastest growing and most developed industries in the current information industry. Accelerating the construction of fiber-optic broadband network can promote the upgrade of network infrastructure, enhance the ability of independent innovation, and stimulate the development of related industries. Corresponding to the financial crisis, it is important to achieve stable growth, structural adjustment, ensure people's livelihood, promote stability, and even enhance the long-term competitiveness of the country. Strategic significance. In the field of video surveillance, optical fiber transmission applications are widely favored.

Optical fiber monitoring: Practical application of new security technology At present, there are also series of optical fiber monitoring technologies in China. Around 2000, research institutes such as Fudan University started to research and develop optical fiber dynamic monitoring technology. In 2005, optical fiber detection and alarm products began to be put into trial use. Based on the optical fiber dynamic sensing technology and successively there are fiber optic intrusion vibration detection, optical fiber audio monitoring, optical fiber line security monitoring and optical fiber pipeline security monitoring and other products on the market, with outstanding characteristics.

Such systems need to integrate multiple disciplines such as optoelectronics, materials, physics, electronics, communications, and computers. Generally speaking, scientific research institutions with deep technical background are required to conduct research and development. At present, China's own independent research and development, and the technical route belongs to the international original, this technology has filled the gaps in the country and has overtaken other similar technologies abroad. Many technical achievements have reached the international advanced level both theoretically and technically. The national science and technology departments of various ministries and commissions, and some provinces and cities, including certain industry competent agencies, have already begun to focus on further deepening and application of this technology. Both the Olympic Games and the Expo have been successfully put into use. The outstanding features of this type of monitoring technology include:

Concealed and easy to deploy. Outstanding anti-destructive. Optical fiber has the advantage of long non-relay transmission distance, low dependence on energy, and no power supply for the sensor network deployed in the entire monitoring area, thus greatly reducing the risk that electronic equipment may pose potential safety hazards to the construction of wooden or other materials structures. . Unlike ordinary gaps in which linear or physical blocking detection systems are easily avoided, fiber-optic sensor networks use three-dimensional, three-dimensional, co-aware functions, like a huge neural network, to pick up voices from the ground, underground, and space. It can accurately perceive the changes and sounds of the entire layout area, perform all-around intrusion detection of environmental changes, and accurately analyze and judge through intelligent behavior analysis and pattern recognition, eliminate environmental impacts that may cause false alarms, and ensure that the system makes Highly accurate notifications and alarms.

The optical fiber itself is a non-metallic passive device, not afraid of lightning strikes, in the natural environment, will not be corroded, not afraid of rain and snow, and even can be used in wet and water environment. At the same time, the fiber-optic sensor has no energy dissipation and will not become a heat source. It is suitable for flammable and explosive sites and meets high-level fire protection requirements. It is very suitable for important places such as Wenbo, which have high security protection levels and special security requirements. Optical audio monitoring is free from all kinds of electromagnetic interference, and it does not produce the current and electronic noise often found in electronic eavesdropping devices. It enables high-fidelity and non-delayed synchronous restoration of the monitoring site. Optical fiber monitoring technology and existing video, infrared and other systems do not conflict with each other, can achieve compatibility and use, the real realization of touch, hear, see.

Optical fiber transmission boosts the development of high-definition surveillance With the increasing demand for various image states and data monitoring, the transmission distance of the image signal cannot meet the demand. Therefore, the development of optical fiber integrated image and control signals (WDM or DWDM technology) can be achieved. Long distance. In addition to the combination of video and control requirements, the optical fiber monitoring and transmission architecture is the main axis of the entire optical fiber transmission and construction. With the different deployment methods, there will be different uses and functions.

The application scope of optical fiber communication is quite extensive. It can be broadly divided into five categories: telecommunication network, datacom network, monitoring network (CCTV) and cable television (CATV) optical fiber transmission network and fiber user loop (FiberInTheLoop, FITL). , And defense and military can also be seen in the application of fiber optic communications.

In the field of monitoring networks (CCTV), it is mostly used as the backbone of the monitoring architecture. It may convert pure video and control signals to optical signals (FOT/FOR), and it may also use digital video signals via TCP/IP networks. Convert to optical TCP/IP signals for transmission and restoration.

With the development of optical fiber communication technology, there are more and more image transmission methods. Optical signal transmission of optical transceivers has greater advantages than other transmission technologies such as twisted pair transmission and coaxial cable transmission. It is well-known that optical fiber transmission mainly relies on the optical transceiver to convert an electrical signal to an optical signal at one end of the optical fiber (cable) and to switch the optical signal back to the corresponding electrical signal at the other end. The optical transceiver provides a flexible transmission and networking method for the monitoring system, with good signal quality and high stability.

In recent years, due to the rapid development of optical fiber communication technology, the cost of optical fiber transmission monitoring systems has also been greatly reduced, so the application of optical fibers and optical transceivers in monitoring systems is becoming more and more popular. Optical fibers have been widely used in home optical fibers and office access networks in areas such as home intelligence, office automation, industrial control networks, automotive airborne and military communications networks. For high-definition video streams that require high transmission bandwidth and transmission distance, it is no longer a dream to realize high-definition monitoring in the era of optical fiber.

The implementation of the national strategy for the development of domestic optical fiber transmission industry in the direction of broadband will inevitably bring about great development and prosperity of optical access technology. China should seize this rare opportunity to seize the commanding heights of access technology, lay a solid foundation for the rollout of broadband applications and services, and enable the people to truly enjoy low-cost, high-quality broadband services. The optical fiber broadband industry is one of the fastest growing and most developed industries in the current information industry. Accelerating the construction of fiber-optic broadband network can promote the upgrade of network infrastructure, enhance the ability of independent innovation, and stimulate the development of related industries. Corresponding to the financial crisis, it is important to achieve stable growth, structural adjustment, ensure people's livelihood, promote stability, and even enhance the long-term competitiveness of the country. Strategic significance. In order to grasp the important opportunities for the development of optical fiber access, and to seize the commanding heights of technological innovation, we must make efforts in the following three aspects:

The first is to increase the fiber access technology innovation and study the original fiber access technology suitable for China's characteristics. As of 2011, China has over 80 million fiber-optic broadband subscribers, and more than 50 million new broadband users will be added within three years. However, compared with developed countries, China still has a lot of deficiencies in the original technology innovation of fiber access, and the access cost of fiber access users is still relatively high. Therefore, it is recommended that the country set up major special projects for optical fiber access technology, increase policy support, form international standards, patents and specifications for optical fiber access with independent intellectual property rights, and study low-cost optical fiber that meets the needs of China's applications and network requirements. Access products, so as to better seize the commanding heights of fiber access technology innovation.

The second is to strengthen the technical innovation of optical communication core network to effectively meet the higher requirements for popular broadband optical fiber access to core network bandwidth and service processing capabilities. With the rapid increase in the number of broadband optical fiber access users, the demand for information has rapidly expanded. Especially in the past few years, the Internet traffic has been exploding, and the existing core network technology will not be able to effectively meet the future popularization of broadband optical fiber access. After the formation of great demand. In order to better support the national broadband infrastructure construction, we should increase the research and innovation of the core network key technologies, such as 1Tb/s single-source optical transmission key technology, 100GDWDM ultra-large capacity optical transmission technology, and all-optical switching technology. It is recommended that the country support the core network technology research and development related enterprises through the core network technology innovation special funds, tax return subsidies, and special funds, so as to better compete for the right to speak of global optical communication core technology innovation, and promote China's optical fiber broadband network. Construction and development.

The third is to strengthen the research on access technologies, standards and products for the last 100 meters of optical fiber broadband networks. Because of the access to the fiber-optic users, especially fiber-to-the-home user homes, China's existing fiber access technologies are not yet suitable for full-scale adoption of fiber-to-the-home systems in terms of standards, technologies, product implementation, engineering design, and implementation. There is still much room for improvement in the quality, reliability, and applicability of access products during the construction of fiber access networks. Therefore, it is recommended that for the final 100 meters of fiber access, the state should increase the layout of policies, projects, and financial support. Through policy guidance, the research and innovation on related technologies, standards, and other aspects of the fiber access user's side have been strengthened. The relevant parties also need to further strictly adhere to the quality and reliability requirements of the product, and deploy various types of new types in the popularization and compulsory urban new buildings. With regard to the small bend radius optical fiber, efforts have been made to implement it, and the use of fiber optics for safe use has been further promoted.