Low-polarization-mode dispersion fiber manufacturing method and device

A low polarization and mode dispersion technology, applied in the field of optical fiber manufacturing, can solve problems such as too large optical fiber twist, unable to solve optical fiber index, difficult cable forming process, etc., and achieve the effect of reducing operational difficulties

Active Publication Date: 2015-09-02
上海光织科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology only provides a protective measure for the PMD twisting equipment, that is, the polarization film dispersion twisting device automatically pops up when detecting a fiber defect, but this technology cannot solve the problem of out-of-control and scrapping of the fiber index due to the delay process; nor can it solve the twisting When the asymmetry is too large, it is easy to cause the twist of the optical fiber to be too large, which brings difficulties to the subsequent cabling process of the optical fiber

Method used

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  • Low-polarization-mode dispersion fiber manufacturing method and device
  • Low-polarization-mode dispersion fiber manufacturing method and device
  • Low-polarization-mode dispersion fiber manufacturing method and device

Examples

Experimental program
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Embodiment 1

[0029] Such as Figure 4 and Figure 5 As shown, the present embodiment includes: the optical fiber testing equipment 220, the PMD twisting control equipment 250 arranged under the wire drawing furnace and the closed-loop control module 280 connected with the optical fiber testing equipment 220 and the PMD twisting control equipment 250 respectively, wherein: closed-loop control The module obtains the measured fiber spin value from the optical fiber testing equipment, and outputs the corresponding twisting speed command to the PMD spinning control equipment after analysis and processing to realize automatic adjustment of spinning.

[0030] The closed-loop control module includes: a data acquisition unit, a feedback calculation unit and an operation execution unit, wherein: the data acquisition unit is connected to the optical fiber testing device 220 and obtains the spin real-time measurement value M online, and the feedback calculation unit is based on M and the preset optica...

Embodiment 2

[0040] Same as Example 2, when the set spin range is adjusted to 1.5 to 5 turns / m, not only the PMD coefficient distribution of the optical fiber is relatively narrow, but also the twist value is very low, in the range of 0.18-0.33 turns / m. In this way, the optical fiber produced by this implementation case not only has a narrow and low distribution of PMD coefficients of the optical fiber, but also the optical fiber can well meet the production requirements of the cable.

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Abstract

The invention provides a low-polarization-mode dispersion fiber manufacturing method and device in the field of fiber manufacture. The low-polarization-mode dispersion fiber manufacturing device comprises a fiber testing device, a PMD twisting control device and a closed-loop control module connected with the fiber testing device and the PMD twisting control device respectively, wherein the fiber testing device and the PMD twisting control device are arranged under a fiber drawing furnace, the closed-loop control module obtains an actually-tested fiber spin value from the fiber testing device, performs analysis processing and then outputs a corresponding twisting speed instrument to the PMD twisting control device so as to achieve automatic twisting adjustment. The spin value and twist relation is utilized to reduce spin so as to decrease twist and reduce the difficulty brought by follow-up fiber cabling process, one online testing index parameter of a fiber and the PMD twisting control device of the fiber are utilized to form automatic closed-loop control, and the fiber index out of control and scrap problems are effectively solved.

Description

technical field [0001] The invention relates to a technology in the field of optical fiber manufacturing, in particular to an optical fiber with a polarization mode dispersion coefficient of about 0.015 and a manufacturing method thereof. Background technique [0002] In recent years, optical fiber communication systems have made tremendous progress to meet the ever-increasing bandwidth demands. Especially when single-mode fiber is widely used, polarization mode dispersion has become an important factor restricting the application of fiber with the technological reform. PMD (Polarization Mode Dispersion) may be increased by the fiber's own defects, such as geometric and pressure asymmetry, which will cause two polarization modes to be transmitted in a single-mode fiber at different group velocities. In the digital transmission system, PMD will lead to pulse separation and pulse stretching, thereby limiting the bit rate and transmission distance, and restricting the bandwidt...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C03B37/027C03B37/07
Inventor何祖源马麟杜江兵
Owner上海光织科技有限公司