Talking about the advantages of plastic optical fiber and plastic optical fiber network

We know that fiber optics has long sung in the long-distance communication, and the use of fiber in short-distance communications such as homes, vehicles, office buildings and offices is still rare. However, with the rapid expansion of multimedia services such as INTENRET data communication, video on demand, video telephony, and video conferencing, higher requirements have been placed on the broadband and high speed of physical networks, enabling fiber-to-the-home and fiber-to-desktop transmission networks. Gradually replacing the existing opto-electronic hybrid form to become the most ideal transmission network, providing users with broadband high-speed information services, thus promoting the continuous development of all-optical switching technology. In the all-optical switching network, broadband high-speed information services are provided for users, thereby promoting the continuous development of all-optical switching technology. In the all-optical switching network, in terms of quartz fiber, the transmission bandwidth and electromagnetic compatibility can fully meet the requirements of use, and the network technology is mature, and the welding and the high cost of the device make it the main force of the access medium. The plastic fiber is also costly in the high-speed short-distance communication transmission. The transmission bandwidth is up to several GHz in the range of 100 meters, and it is easy to connect, flexible and easy to bend, although its system performance is still under study. Or the initial stage of application, but its role in the future short-distance communication is not negligible, its price and performance advantages, it has broad prospects for the application of household access in the network all-optical.

At present, indoor short-distance information transmission media or technology mainly has the following types:

1. Coaxial cable with twisted pair based on copper conductor

This type of use is low in use and meets the needs of the real world. However, if the user's future requirements for bandwidth and speed are met, it is necessary to overcome the electromagnetic interference, information confidentiality, bandwidth expansion, transmission rate, and transmission distance. High research funds and use costs are also high due to the use of expensive and complicated electronic devices, and the overall competitiveness is reduced.

2, single mode and multimode quartz fiber

This kind of technology is relatively mature, but the core diameter of quartz fiber is very thin (-10μm), which leads to difficult connection and high cost. The optoelectronic device has high technical requirements and high price, and its brittle fracture and bending loss limit its installation in a narrow space.

3. Wireless technologies such as infrared and short-range mobile communication

This kind of technology is currently more popular. Countries around the world have invested heavily in mobile communication technology research, technology is changing with each passing day, and related products are updated quickly, but when data wireless transmission technology is applied to indoors and vehicles, it is short. The cost of use is relatively high when communicating, and the electromagnetic interference problem, environmental impact problem, transmission bandwidth and rate problem, or the high research cost and expensive equipment investment necessary to solve these problems will be at a short distance. The main obstacles in the application of communication. From the perspective of realistic practical and technological research trends, to overcome the shortcomings of copper conductors and wireless transmission technology, POF is the preferred target for short-distance high-speed transmission.

Plastic optical fiber (POF) has the following advantages over quartz fiber:

* Low modulus, large core diameter (0.3-1.0mm), simple POF connector can be used for connection, even if the fiber alignment center alignment produces a deviation of 30μm, it will not affect the coupling loss;

*The numerical aperture is large (about NA0.5), the acceptance angle θA can reach 60°, and the quartz fiber is only 16°, cheap LED can be used, and the coupling efficiency is high;

*Flexible, easy to process and use;

* There is a low loss window in the visible region;

*Light weight;

* Low cost and processing costs.

POF networks have significant advantages over other transmission media in LAN systems:

*POF is not sensitive to electromagnetic interference, and does not generate radiation. The attenuation at different data rates is constant, the bit error rate is predictable, and it can be used in an electrical noise environment.

* Its long size can reduce the tolerance control requirements in joint design, so the cost of forming a net is low.

The POF is now compared to the current copper media with low cost and the most popular indoor access:

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