Manufacture of low polarization mode dispersion single mode optical fibers and products thereby

A manufacturing method and modal dispersion technology, applied in glass manufacturing equipment, manufacturing tools, glass fiber products, etc., can solve the problems of increasing optical fiber resistance, weakening the torque generated by the twisting system, increasing the difficulty of equipment maintenance, and achieving good friction effects.

CN1209308CInactive Publication Date: 2005-07-06YANGTZE OPTICAL FIBRE & CABLE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2005-07-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a manufacturing method of a low polarization mode dispersion single-mode optical fiber and an optical fiber prepared by the method. A rubbing system is installed at the downstream end of the conventional drawing tower. The rubbing method does not change the drawing path of the optical fiber. The axis of the rubbing wheel swings periodically in a plane parallel to the drawing direction. The surface rotates around its axis. When there is a certain angle between the plane of the rubbing wheel and the wire drawing direction, the angular velocity component along the radial direction of the fiber reacts on the fiber to make it twist, and propagates to the vitreous softening area upstream of the wire drawing in the form of mechanical waves. Produce plastic deformation and solidify into the newly drawn optical fiber, so that the fiber introduces a non-sinusoidal twisted distribution of frequency and amplitude disorder along the length direction, and increases the energy coupling between the two orthogonal modes that cause the birefringence phenomenon of polarization mode dispersion, The optical fiber polarization mode dispersion coefficient manufactured by this method is lower than 0.03ps / km 1 / 2 .
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Description

technical field

[0001] The invention relates to a manufacturing method of a single-mode optical fiber, in particular to a manufacturing method of a PMD single-mode optical fiber with low polarization mode dispersion. The invention also relates to optical fibers prepared by this method. Background technique

[0002] In recent years, with the rapid growth of people's demand for communication bandwidth, the single-channel transmission rate of telecommunications backbone networks in many countries is developing from Gb / s level to Tb / s level, which should be attributed to the erbium-doped fiber amplifier EDFA and other optical devices Applications. However, they also bring about a serious problem, which is to accumulate the original small polarization effects, such as polarization mode dispersion PMD, polarization dependent loss PDL and other adverse effects, and finally have a non-negligible impact on the optical fiber communication system. Since PDL ...

Examples

Embodiment Construction

[0102] In this example, the single-mode optical fiber with low polarization dispersion is prepared by the following method: a φ80 optical fiber preform using the sleeve process is fixed to the rod feeding mechanism at the top of the drawing tower, and sent to a resistance furnace with a temperature of 2200 ° C for 1000 m / min speed for wire drawing, the drawn optical fiber passes through the bare optical fiber geometric size monitor, coating system, rubbing system, drawing tension wheel, finished optical fiber geometric size monitor and wire receiving system in sequence, and the optical fiber introduces torque in the rubbing system The optical fiber is forced to rotate around its axis, and the direction of rotation of the optical fiber changes periodically with the reciprocating swing of the rubbing wheel in a plane parallel to the optical fiber, and a unique mechanical wave is formed, which can be drawn upstream along the optical fiber Direction propagation, and can reach the ...