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Design and manufacturing method of an ultra-low loss large effective area single-mode optical fiber

An effective area, single-mode fiber technology, applied in clad fibers, multi-layer core/clad fibers, optics, etc., can solve the problems of increased cable cut-off wavelength, bending loss and fiber loss. The additional loss is small, the effective area is increased, and the effect of improving the fiber input power

Active Publication Date: 2022-04-19
GUILIN UNIV OF ELECTRONIC TECH
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  • Application Information

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Problems solved by technology

[0022] To sum up, in order to increase the effective area of ​​the optical fiber to overcome the nonlinear effect, the negative effect brought about at the same time is the increase of the bending loss and the fiber loss, and the cut-off wavelength of the cable is also greatly increased, and the ultra-long-distance optical fiber Communication must be single-mode transmission

Method used

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  • Design and manufacturing method of an ultra-low loss large effective area single-mode optical fiber
  • Design and manufacturing method of an ultra-low loss large effective area single-mode optical fiber
  • Design and manufacturing method of an ultra-low loss large effective area single-mode optical fiber

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Embodiment Construction

[0045] Examples are further detailed below.

[0046] Using the PCVD method, silicon tetrachloride, oxygen and carbon hexafluoride are first deposited on the inner wall of the quartz reaction tube to form the third cladding layer, and then silicon tetrachloride, germanium tetrachloride, oxygen and carbon hexafluoride are deposited to form The second cladding layer is deposited with silicon tetrachloride, germanium tetrachloride, oxygen and carbon hexafluoride to form the first cladding layer, and then deposited with silicon tetrachloride, oxygen and carbon hexafluoride to form the core layer. The deposition flow ratio of the core layer is specially optimized to increase the Cl content of the core layer, and then deposit K in the core, and the concentration of alkali metal K forms a similar Gaussian distribution from the center to the edge of the core. After the deposition is complete, the reaction tube with the central hole is collapsed to obtain a solid preform.

[0047] The ...

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Abstract

The invention discloses a design and manufacturing method of a single-mode optical fiber with ultra-low loss and large effective area. Highly doped F concave cladding and pure silica cladding. This kind of optical fiber is manufactured by plasma chemical vapor deposition method, because plasma chemical vapor deposition method is very suitable for manufacturing optical fiber with complex cross-sectional structure. The fiber cut-off wavelength of the present invention is controlled below 1520nm, but the effective area of ​​the fiber can reach 145-155μm 2 , adopting the design scheme of the present invention can effectively reduce the attenuation of the optical fiber, the attenuation of the optical fiber at the wavelength of 1550nm is less than or equal to 0.160dB / km, and the optical fiber has relatively small bending loss.

Description

(1) Technical field [0001] The invention relates to the design and manufacturing method of an ultra-low-loss, large-effective-area single-mode optical fiber, which is mainly used in the fields of ultra-long-distance, ultra-large-capacity, and ultra-high-speed optical fiber communication transmission. (2) Background technology [0002] The transmission capacity of optical fiber communication has been continuously increasing, and with the invention of coherent optical communication technology, capacity expansion can be achieved by high-order signal optical phase modulation methods. The original wavelength division multiplexing technology, mode division multiplexing technology and time division multiplexing technology can be used together with the high-order signal optical phase modulation method, so that the transmission capacity can be expanded rapidly. [0003] The fiber dispersion and polarization mode dispersion problems in the SDH era can already be compensated in the ele...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02G02B6/036
CPCG02B6/02019G02B6/036
Inventor 成煜邓洪昌徐荣辉苑立波
Owner GUILIN UNIV OF ELECTRONIC TECH