Multimode fiber and Singlemode Optical Fiber Play An Important Role In Communication System

Fiber can be divided into single-mode fiber and multimode fiber, based on the different transission mode of light. the core diameter of the multimode optical fiber is 50 or 62.5μm, cladding outer diameter of 125μm, or expressed as 50/125μm 62.5/125μm. Single mode fiber core diameter is 8.3μm, a cladding outer diameter of 125μm, expressed as 8.3/125μm. Work has short wavelength fiber 850nm, 1310nm longwave and 1550nm. Fiber loss generally decreases with increasing wavelength, 850nm loss is generally 2.5dB/km, 1.31μm loss is 0.35dB/km, 0.20dB loss is 1.55μm / km, which is the lowest loss of the Fiber Optic Patch Cables, the wavelength tends to increase the loss of more than 1.65μm. Since OH ˉ (water peak) absorption, 900 ~ 1300nm and 1340nm ~ 1520nm range has a peak in the loss, the two ranges is not fully utilized.

The core of Multimode Fiber Patch Cable is thick(50 or 62.5μm), multiple modes of light can pass. However, its mode dispersion is large, which limits the frequency of the transmitted digital signal, and with the increase in distance will be more severe. Therefore, multi-mode fiber transmission distance is relatively recent, generally only a few kilometers. Mentioned Gigabit multimode fiber optic cable, optical system in the optical signal transmission, optical transceivers and fiber inseparable. Because traditional multimode fiber can support Gigabit transmission tens of meters, the new optical transceiver is used with Gigabit applications. Because traditional multimode fiber can support Gigabit transmission tens of meters, the new optical transceiver is used with Gigabit applications, ISO / IEC 11801 has developed a new standard grade multimode fiber, that OM3 category, and in 2002 promulgated in September. OM3 fiber optic for LED and laser bandwidth for both modes are optimized, while require to DMD testing and certification. Adopt the new standard fiber optic cabling system can support at least Gigabit multimode transmission mode to 300 meters, while in the single-mode approach can achieve more than 10 kilometers (1550nm more support 40 km transmission).

The central core of Single Mode Fiber Cable is very thin (core diameter is usually 9 or 10μm), only one mode of transmission of light. Therefore, the inter-mode dispersion is small, suitable for long-distance communication, but there is material dispersion and waveguide dispersion, so that Single Mode Fiber has a higher stability requirements to the spectral width, i.e., a narrower spectral width and stability better. Later found in the 1310nm wavelength, the total dispersion single-mode fiber is zero. Judging from the loss characteristics of the fiber, 1310nm is just a low-loss window to optical fiber. Thus, 1310nm wavelength optical fiber communication has become a very good job window, is now the main practical working band optical fiber communication systems. The main parameters of conventional 1310nm single-mode fiber is determined by the International Telecommunication Union ITU-T recommendations in the G652, therefore this fiber, also known as G652 fiber. Since the above-mentioned OH ˉ (water peak) absorption, 900 ~ 1300nm and 1340nm ~ 1520nm range has a peak in the loss of the phenomenon known as the water peak.

At the same time , because G.652.D is the latest indicator of single-mode fiber, G.652 level indicators are all the most stringent and fully backward compatible. If you specify only the G.652 means G.652.A performance specifications, it should pay particular attention. TeraSPEED fiber are all satisfied G.652.A, B, C and D performance specifications. We believe that the perspective of the user should be applied, the transmission angle distance, forward-looking perspective, the cost point of view. From the above factors, lowest price best investment performance, <strong>Fiberstore.com</strong> is a professional manufacturer of fiber optic cable, we mainly offer optical transceiver ,Mux / Demux , Fiber Media Converter, Video multiplexer, fiber optic patch cord ,fiber patch panel , fiber optic cable connectors and other fiber optic network accessories. Welcome to consult.