SFP Series forty-seventh Week News Abstract 1

2011-11-13 10:04:51

Week News Abstract For SFP Series in 10GTEK
The abstract is mainly about the optical communication related products,including: FTTH,GPON,EPON,SFPPLC,PTN,ODN,Optical module,Optical devices,optical communications,Optical transceiver module,Etc.

Cable selection rule
Selection of cable should pay attention to what? In addition to the selection of fiber optic cable fiber count and fiber according to types of thought, but also to choose based on the use of fiber optic cable outer sheath.The following are selected cable law, we should note these points:1 outdoor fiber optic cable buried the appropriate selection of Kay-like fiber. Overhead, can be selected with more than two root ribs and the black plastic outer sheath of the cable.(2) buildings used in the selection of fiber optic cable should pay attention to the flame, smoke and toxicity characteristics. Generally in the pipe and forced ventilation can choose the type of fire, but smoke, exposure to the environment should be used flame retardant, smoke-free and non-toxic type.3 vertical wiring inside the building, you can choose Layer Stranding Cable (Distribution Cables); horizontal cabling type, can be used to branch cable (Breakout Cables).4 transmission distance in less than 2Km, the choice of multi-mode light, more than 2Km relay or use single-mode fiber optic cable can be used. These are put aside their own fiber optic cable price and quality factors, one should note from the application to consider several issues. Implementation need to be flexible. In fact, complex and diverse routing environment, all kinds of problems may arise, which we need in the planning and construction in strict accordance with wiring standards implementation, flexible analysis of a problem, I believe the problem will be resolved.
Analysis of cable structure
Coated optical fiber cable in accordance with which the state has tight cable structure and loose structure of categories. Skeleton-type cable is a typical song structure. Optical fiber buried in the peripheral skeleton screw slot, there is room to maneuver. This cable isolation and prevent microbending loss of external characteristics of a good. Stranded cable armor Morimichi tight package when using the fiber is a typical tight structure, coated fiber was tightly wrapped in the cable structure, but Stranded cable package with loose fiber, because fiber plastic pipes in the secondary coating can be active, still loose structure. Stranded cable into the cable technology is relatively simple, with good performance. In addition, ribbon cable, single core fiber optic cable and other structure types.Increase in both pieces of cable to carry tension. It consists of a high modulus of elasticity of high strength material, commonly used steel wire, high-strength glass fiber and high modulus aramid and other synthetic fibers. Increase in the use of fiber optic components to produce only very low stress elongation deformation (eg, less than 0.5%), to protect the fiber from stress or only under very low stress, to prevent fiber breakage. Cable sheath structure and materials, use the environment and requirements may be, and under the same conditions of use basically the same cable. The use of the environment in accordance with cable, there are aerial cable, buried cable, submarine cable, fiber optic cable and other field.
what is Single-mode optical fiber
Fiber with a core diameter less than about ten times the wavelength of the propagating light cannot be modeled using geometric optics. Instead, it must be analyzed as an electromagnetic structure, by solution of Maxwell's equations as reduced to the electromagnetic wave equation. The electromagnetic analysis may also be required to understand behaviors such as speckle that occur when coherent light propagates in multi-mode fiber. As an optical waveguide, the fiber supports one or more confined transverse modes by which light can propagate along the fiber. Fiber supporting only one mode is called single-mode or mono-mode fiber. The behavior of larger-core multi-mode fiber can also be modeled using the wave equation, which shows that such fiber supports more than one mode of propagation (hence the name). The results of such modeling of multi-mode fiber approximately agree with the predictions of geometric optics, if the fiber core is large enough to support more than a few modes.The waveguide analysis shows that the light energy in the fiber is not completely confined in the core. Instead, especially in single-mode fibers, a significant fraction of the energy in the bound mode travels in the cladding as an evanescent wave.The most common type of single-mode fiber has a core diameter of 8–10 micrometers and is designed for use in the near infrared. The mode structure depends on the wavelength of the light used, so that this fiber actually supports a small number of additional modes at visible wavelengths. Multi-mode fiber, by comparison, is manufactured with core diameters as small as 50 micrometers and as large as hundreds of micrometers. The normalized frequency V for this fiber should be less than the first zero of the Bessel function J0 (approximately 2.405).
The above information is edited by 10GTEK.

10GTEK is a professional manufacturer engaged in the R&D,manufacturing and marketing of Fiber Optic Transceivers and High Performance Cables Assemblies.

10GTEK provides customers with top quality and cost effective products. The prompt response and excellent customer support contribute to clients' full satisfaction.

10GTEK passed quality inspection,ISO9001:2008,and our products passed by CE?FCC and RoHS certificates

10GTEK now has developed a full series of optical transceivers including:SFP+,XFP,X2,XENPAK,GBIC,SFP,COPPER SFP,BiDi SFP,CWDM SFP,DWDM SFP etc,from 125Mbps low rate module to 10Gbps full line products.

10GTEK now has developed a full series HPC cable assemblies including SFP/SFP+ Cable,XFP Cable,QSFP Cable,MiniSAS Cables,ect.

10GTEK with the ability of R&D,can customize the products to fully meet customers' satisfaction.

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