The development of optical fiber communication system and the development trend of optical fiber com

1. Nano-quiet rice technology and optical fiber communication. Nanometer is a unit of length, 10-9 meters, and nanotechnology is the study of the properties and applications of materials with structural dimensions in the range of 1 to 100 nanometers. Microelectromechanical systems (MEMS) technology, based on micro-nanotechnology, is now receiving widespread attention.

2. Optical switching is the key to achieving high-speed all-optical networks. Optical switching refers to the direct exchange of optical signals transmitted by optical fibers. For a long time, the implementation of high-speed all-optical networks has been plagued by switching problems.

Because the traditional switching technology needs to convert data into electrical signals for alternating megachain exchange, and then convert it into optical signals for transmission, these photoelectric conversion devices are too large and expensive. And optical exchange completely overcomes these problems. Therefore, optical switching technology is bound to be the development direction of communication network switching technology in the future.

3. Passive optical network (PON) technology. Passive optical network is a very attractive pure media network, which avoids the electromagnetic interference and lightning influence of external equipment, reduces the failure rate of lines and external equipment, improves system reliability, and saves maintenance costs, which is a technology that telecom maintenance departments have been looking forward to for a long time.

4. Optical soliton communication system. In the conventional linear optical fiber communication system, optical fiber loss and dispersion are the main factors limiting its transmission capacity and distance. Due to the continuous improvement of the optical fiber manufacturing process, the optical fiber loss has approached the theoretical limit, so optical fiber dispersion has become a bottleneck to achieve ultra-large capacity and ultra-long-distance optical fiber communication, which needs to be solved urgently.

For optical fiber communication, ultra-high speed, ultra-large capacity and ultra-long-distance transmission have always been the goal pursued by people, and all-optical network is also the dream that people unremittingly pursue.

1. Wavelength division multiplexing system. Ultra-large capacity and ultra-long-distance transmission technology WDM technology has greatly improved the transmission capacity of optical fiber transmission system, and has broad application prospects in cross-sea optical transmission systems in the future.

2. Optical soliton communication. Optical solitons are a special ultra-short optical pulse of the order of PS, because it is in the anomalous dispersion region of the optical fiber, the group velocity dispersion and nonlinear effects are balanced accordingly, so the waveform and velocity remain unchanged after long-distance transmission of the optical fiber.

3. All-optical network. All-optical network is the highest stage of the development of optical fiber communication technology. The traditional optical network has realized all-optical inter-node, but electrical components are still used at the network nodes, which limits the further increase of the total capacity of the communication network trunk, so the real all-optical network has become a very important topic.