Tensile Testing of Fiber Optic Cable Selection

2012-03-21 10:46:42

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

KST supply fiber optic accessory
Optical Distribution Frame: fiber-optic network for indoor wiring system.Fiber Optic Connector: for all kinds of optical devices (such as PDH, etc.) and fiber-opticconnection between.Fiber adapter: all kinds of optical devices for fiber-optic connection with the conversion.Attenuator: for the input optical power attenuation, to avoid leaving the input optical power superdistortion generated by the light receiver.Optical splitter: one for the optical signal is decomposed into multiple optical WDM optical signaloutput: for the optical path in the separation of different wavelengths of light or mixed.
KST about Water seepage problem
The fiber optic cable seepage appears to be a very simple question, but failed often occur in the previous test (including the selection of test). In the first use of fiber optic cable failure, water seepage, fiber optic cable is not the obvious question. But in the long-term use of water or moisture into the cable internal, water can increase the fiber in the 1383 nm water peak attenuation, the fiber surface of the micro-cracks continue to expand until the fiber breaks at the same time also corrode metal reinforcement and react with metallic materials caused by the hydrogen loss of the fiber, which can seriously affect the performance and service life of the cable. Therefore, the optical fiber cable water-blocking measure is one of the important issues of cable design.The seepage of the fiber optic cable can be divided into a lateral water seepage and vertical seepage. Lateral seepage is due to the fiber optic cable inside and outside the vapor pressure gradient, water or moisture along the cable radial penetration and migration from outside to inside; and longitudinal water penetration is the penetration of water along the fiber length direction. To prevent lateral seepage, usually longitudinally applied aluminum or steel structure; waterproof ointment to prevent longitudinal water penetration in the cable core and sheath gap fill or place waterproof tape and other waterproof material. The following analysis of seepage from several aspects of the failure causes and their corresponding countermeasures.
Tensile testing of fiber optic cable selection
The fiber optic cable in the course of the main forms of force is the tensile strength, tensile properties of fiber optic cable is the most important mechanical properties. Which led to stretch additional attenuation of the main reasons for failure is lack of fiber excess length. The so-called fiber excess length refers to the relative elongation when the fiber optic cable stretching from the normal state, the fiber optic cable to fiber optic cables by the tensile strain. Commonly used in central tube fiber optic cable and fiber excess length of stranded cable is generally controlled at 0.2% to 0.3%. If there is not enough I long, when the fiber optic cable by a certain tension, we should not force the fiber will also have to strain to affect performance. Of course, I long for too long can lead to fiber bending is too large, causing attenuation increases as well as anti-side pressure drop performance.Fiber excess length formed in the secondary coating processes, shown in Figure 1. Fiber from the line to put shelves in certain off tension release, the extruder head, squeezed into the PBT beam tube, the tube filled with the ointment, and then through the temperature sink cooling molding, traction wheel by the wheel I long traction, the fiber and the beam pipe wheel I long traction wheel lock. Fiber there is a certain amount of tensile force in the warm water tank section, on the other hand the fiber in the round led fiber close to the inner side of the beam tube, the fiber length is less than the length of the beam tube, so the fiber length is negative I I long into the cold water tank, due to the great contraction of the beam tube in the cooling and the formation of not only compensates for the negative in front of more than long, and required for the formation is more than long.
The above information is edited by 10GTEK.
10GTEK TRANSCEIVERS CO., LTD (Hereinafter refered to as 10GTEK) is specialized in developing and manufacturing Fiber Optical Transceivers and High Performance Cables which are wildly applied in Datacon, Telecom and CATV, providing customers with top quality and cost effective products. Our High Speed Cables cover Passive SFP+ Cable, Active SFP+ Cable, QSFP+ cables, MiniSAS (SFF-8088) Cables, CX4 Cables, Harness cables, Breakout Cables, Patchcords. We also manufacture Fiber Optic Transceivers like 10G XFP, 10G SFP+, SFP DWDM/ CWDM, GBIC, etc. The prompt response and excellent customer support contribute to clients‘ full satisfaction.Today, 10GTEK has been growing fast in the optical field for its unique and competitve excellence which has got a high attention from datacom and telecom.
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