Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for manufacturing bent insensitive optical fiber preformed rod

An optical fiber preform and bend-insensitive technology, which is applied in the field of optical communication, can solve the problems of low mechanical strength of optical fiber, insufficient bending performance, and large attenuation of optical fiber, and achieve good compatibility, improved mechanical strength, and small stress residue.

Active Publication Date: 2011-08-17
HANGZHOU FUTONG COMM TECH CO LTD
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved and the technical task proposed by the present invention are to overcome the deficiencies in bending performance, large optical fiber attenuation, OH- high content, low optical fiber mechanical strength, and complex process, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for manufacturing bent insensitive optical fiber preformed rod
  • Method for manufacturing bent insensitive optical fiber preformed rod
  • Method for manufacturing bent insensitive optical fiber preformed rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Use 1 doping blowtorch to make mandrel 1, see structure type Figure 2a The depressed-cladding fiber structure 7 in , and then the cladding is deposited by OVD.

[0041] The resulting bend-insensitive optical fiber preform properties are as follows:

[0042] Mode field diameter: 8.8~9.0μm;

[0043] Zero dispersion wavelength: 1300~1324nm;

[0044] Fiber cut-off wavelength: 1320±10nm;

[0045] Water peak absorption attenuation: 0.30~0.32dB / Km / km;

[0046] Macro bend φ30mm around 10 turns:

[0047] Additional loss value at 1550nm: 0.005~0.01dB / Km,

[0048] Additional loss value at 1625nm: 0.05~0.1dB / Km;

[0049] Macro bend φ20mm around 1 turn:

[0050] Additional loss value at 1550nm: 0.05~0.08dB / Km,

[0051] Additional loss value at 1625nm: 0.1~0.2dB / Km;

[0052] Macro bend φ15mm around 1 turn:

[0053] Additional loss value at 1550nm: 0.3~0.5dB / Km,

[0054] Additional loss value at 1625nm: 0.5~1.0dB / Km.

[0055] The mode field diameter of the optical fiber d...

Embodiment 2

[0057] Use 1 doping blowtorch to make mandrel 1, see structure type Figure 2b The cladding-sag-type optical fiber structure 8 in , and then the cladding is deposited by OVD.

[0058] The resulting bend-insensitive optical fiber preform properties are as follows:

[0059] Mode field diameter: 8.4~8.8μm;

[0060] Zero dispersion wavelength: 1300~1324nm;

[0061] Fiber cut-off wavelength: 1300~1350nm;

[0062] Water peak absorption attenuation: 0.31~0.33dB / Km / km;

[0063] Macro bend φ30mm around 10 turns:

[0064] Additional loss value at 1550nm: 0.01~0.02dB / Km,

[0065] Additional loss value at 1625nm: 0.05~0.1dB / Km;

[0066] Macro bend φ20mm around 1 turn:

[0067] Additional loss value at 1550nm: 0.01~0.02dB / Km,

[0068] Additional loss value at 1625nm: 0.05~0.1dB / Km;

[0069] Macro bend φ15mm around 1 turn:

[0070] Additional loss value at 1550nm: 0.1~0.2dB / Km,

[0071] Additional loss value at 1625nm: 0.3~0.6dB / Km.

Embodiment 3

[0073] Use 1 or 2 doping torches to make mandrel 1, see structure type Figure 2c The double-clad depressed fiber structure 9 in , and then the cladding is deposited by OVD.

[0074] The resulting bend-insensitive optical fiber preform properties are as follows:

[0075] Mode field diameter: 8.4~8.8μm;

[0076] Zero dispersion wavelength: 1300~1324nm;

[0077] Fiber cut-off wavelength: 1300~1350nm;

[0078] Water peak absorption attenuation: 0.31~0.33dB / Km / km;

[0079] Macro bend φ30mm around 10 turns:

[0080] Additional loss value at 1550nm: 0.001~0.005dB / Km,

[0081] Additional loss value at 1625nm: 0.003~0.008dB / Km;

[0082] Macro bend φ20mm around 1 turn:

[0083] Additional loss value at 1550nm: 0.005~0.01dB / Km,

[0084] Additional loss value at 1625nm: 0.005~0.01dB / Km;

[0085] Macro bend φ15mm around 1 turn:

[0086] Additional loss value at 1550nm: 0.005~0.01dB / Km,

[0087] Additional loss value at 1625nm: 0.01~0.02dB / Km.

[0088] -------------------------...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
radiusaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for manufacturing a bent insensitive optical fiber preformed rod, and belongs to an optical communication technology. The bent insensitive optical fiber preformed rod prepared by the prior art has the defects of insufficient bending performance, high optical fiber attenuation, high OH- content, low optical fiber mechanical strength, complex process and the like. When a core rod is manufactured by using a vapor axial deposition (VAD) process, 1 to 2 paths of blast lamps for synchronously depositing a doped layer are increased according to the profile of the designed optical fiber preformed rod, a coating is manufactured on the vitrified core rod by using an outside vapor deposition (OVD) process or a sleeve process, and finally the bent insensitive optical fiber preformed rod is obtained. The optical fiber preformed rod prepared by the method has the advantages of low optical fiber attenuation, low OH- content, high mechanical strength and the like; themethod can manufacture the required structure model according to the requirement; the optical fiber drawn by using the manufactured optical fiber preformed rod has excellent bending performance, and is suitable for the application occasions of fiber to the home (FTTH) access, small optical devices, optical cables with small bending radius requirements and the like.

Description

technical field [0001] The invention belongs to the optical communication technology, and in particular relates to a method for manufacturing a bend-insensitive optical fiber preform. The bend-insensitive optical fiber preform manufactured by this method has excellent bending performance, low attenuation, and OH - With low content and high mechanical strength, it is suitable for applications such as FTTH access, miniaturized optical devices, and optical cables with small bending radius requirements. Background technique [0002] With the gradual improvement of the backbone network, long-distance communication network and other networks, as well as the demand for FTTH construction in Japan, the United States and other countries, after 2003, the demand for optical fiber cables for access networks has become the most important demand. Due to the characteristics of the access network, its optical fiber consumption will be 5 to 10 times that of the metropolitan area network, and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/012
CPCC03B2203/23C03B37/0142C03B2207/50
Inventor 吴海港沈杰赵行军刘利刘连勇
Owner HANGZHOU FUTONG COMM TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com