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fiber optical cable


optical fiber cable


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optical fiber cable factory

Zhejiang Headway Communication Equipment Manufacturing Co., Ltd. is a optical fiber cable factory,With perfect quality control system, talented technical team, advancing equipments, and our reliable quality.
optical fiber cable transmission carrier is light, although the band is very wide, but it does not take full advantage of this is due to light dispersion in optical fibers (mode dispersion, material dispersion and waveguide dispersion) sake. Them in varying degrees, affect the optical fiber bandwidth.
Mode dispersion is different due to different modes of light in the core - packet interface on the angle of total reflection, tortuous journey forward of varying lengths. Thus, a beam of light pulse incident fiber, it contains the end of each mode to reach a certain distance transmission will be successively, and thus cause pulse broadening. It allows a bunch of narrow pulses show wide 20 ns / km, the corresponding bandwidth of the fiber is about 20 MHz · km.
Fiber attenuation factors of the scattering loss, absorption loss and microbending loss. Scattering loss mainly by Rayleigh scattering, which is caused by the irregular molecular structure of the glass micro-refractive index fluctuations caused by the inherent loss of the optical fiber, optical attenuation minimum. It is inversely proportional to λ4. Wavelength of less than 0.8 μm, the Rayleigh scattering loss is rising rapidly, limiting the use of fiber. Fiber matrix material SiO2 and doped oxide molecules, the intrinsic absorption loss and fiber attenuation increases rapidly when the wavelength is greater than 1.7 micron. Therefore, the use of such optical fiber wavelength is limited in the range of 0.8 to 1.7 micron. Within this range, the attenuation of the main impurities in the quartz glass Fe + + and Cu + + and other transition metal ions and OH-. Absorption loss caused. With the improvement of the purification process, impurities absorption loss has been largely eliminated, so as to achieve the limit of the Rayleigh scattering loss. Irregular small bending of the fiber caused by mode coupling caused by the microbending loss, so should be avoided in the processing and use of fiber optic microbend.


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Changxing County,Zhejiang
Tel:+86-572-6129668 6128608
Fax:+86-572-6128570 6236642

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