XFP optical transceiver, is really just a photoelectric conversion device is only responsible for the completion of the optical / electrical conversion, other functions such as multiplexing / demultiplexing, 64B / 66B encoding and decoding is implemented by the chip on the circuit board. XFP optical module can easily achieve high port density applications.

Automatically Switched Optical Network (ASON), also known as intelligent optical network. It is through the introduction of routing protocols and signaling mechanisms in synchronous digital hierarchy (SDH), and to promote the integration of optical switching and transport level, to provide users with a wavelength of wholesale bandwidth rental, OVPN, traffic accounting, SLA business services and so on.

Fiber is a core refractive index higher than that of the cladding of the coaxial cylindrical dielectric waveguide. The main component of the core material is doped silica or plastic.

Dispersion is due to light waves in different frequency components at different transmission speeds to produce a physical effect of different time delays. Digital transmission, dispersion caused by the optical pulse broadening, resulting in around pulse overlap, causing ISI mathematics signals, resulting in increased error rate; for analog transmission, it will limit the bandwidth, harmonic distortion, making SNR system decreases. Dispersion including material dispersion, waveguide dispersion, mode dispersion, polarization mode dispersion, and other.

Optical network terminals for access network of optical fiber in the CPE. FTTx access network using optic fiber technology, ranging from regional telecommunications infrastructure equipment room to the user terminal equipment, including equipment for the central office optical line terminal (OLT), CPE for the optical network unit (ONU) or optical network terminal (ONT).

Data center / cloud computing system needs higher bandwidth and lower power consumption and more urgent, AOC is one of the best solutions to meet this demand. AOC (active optical cables) compared with the copper interconnect has many significant advantages, such as lower on the system link transmission power, weighs only a quarter of direct-attached copper, copper-half volume slightly, and room cabling system has better air flow heat dissipation than copper cable bend radius can be made smaller, over longer distances (up to 100 to 300 meters), and the error rate is also better transmission performance , BER can reach 10 ^ -15. Compared with the optical transceiver module, AOC is not exposed due to the presence of optical interface, optical interface clean and contaminated problem does not exist, the system greatly enhanced stability and reliability, and reduce maintenance costs the engine room.

Active Optical Cable Products is one of the main interconnection between these core devices, the active optical cable market research report from CIR's display, its market size in 2012 reached $ 720 million, this figure is expected to double by 2017, reaching $ 1.9 billion, promising.

Optical fiber communication wavelength range: 0.8μm ~ 1.7μm (frequency 1.76 * (10 ^ 14) to 4.75 * (10 ^ 14))

Now a lot of the network, subject to the fiber aging, terrain reasons, loaded dimensional factors and other reasons, PON network led to the loss of light is too large, making it impossible to meet the receiver sensitivity between ONU or near zero cutoff, so that the terminal network connection is unstable or can not opening and so on.

Optical fiber communication: it refers to the light as an information carrier, optical fiber as the transmission medium of communication.