Polarization maintaining optical fiber with small bending radius and manufacture method of polarization maintaining optical fiber

A polarization-maintaining optical fiber and bending radius technology, applied in polarized optical fiber, cladding optical fiber, manufacturing tools, etc., can solve the problems of the development of optical fiber sensor devices in the direction of miniaturization, the difficulty of making optical fiber sensor devices of large size, and the inability to meet people's needs, etc. , to achieve the effect of improving crosstalk stability, reducing stress interference, and improving bending resistance

Active Publication Date: 2013-04-03
RUIGUANG TELECOMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the above-mentioned polarization-maintaining optical fiber is difficult to guarantee its performance while the bending radius is small, it is difficult to make a small-sized optical fiber sensor device with the above-mentioned polarization-maintaining optical fiber, and it is difficult to develop the optical fiber sensor device in the direction of miniaturization, which cannot meet people's needs

Method used

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  • Polarization maintaining optical fiber with small bending radius and manufacture method of polarization maintaining optical fiber
  • Polarization maintaining optical fiber with small bending radius and manufacture method of polarization maintaining optical fiber
  • Polarization maintaining optical fiber with small bending radius and manufacture method of polarization maintaining optical fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: The radius of the quartz cladding 1 is 40um.

[0051] The core rod is made by plasma chemical vapor deposition method combined with the sleeve method. The core rod includes a core layer 2, a second quartz cladding ring 3 and a third quartz cladding ring 5; a sleeve is placed on the outside of the core rod to form a solid rod 6. The casing forms a quartz cladding 1 . Two stress through holes are axially opened on the solid rod 6, and the stress through holes are arranged symmetrically along the center of the core layer 2. When opening the stress through holes, diamond drills are used, combined with mechanical positioning, infrared induction positioning and electronic control.

[0052] Two boron-doped stress rods 7 are made by doping silicon dioxide with boron by plasma method, and the stress rod 7 made by plasma method has better uniformity. The surface of the stress rod 7 is treated so that the outer diameter of the stress rod 7 is 0.1 mm smaller than the...

Embodiment 2

[0060] Embodiment 2: The radius of the quartz cladding 1 is 62.5um.

[0061] Plasma chemical vapor deposition method combined with sleeve method is used to manufacture core rod, core rod includes core layer 2, second quartz cladding ring 3 and third quartz cladding ring 5; , the casing forms a quartz cladding 1 . Two stress through holes are axially opened on the solid rod 6, and the stress through holes are arranged symmetrically along the center of the core layer 2. When opening the stress through holes, diamond drills are used, combined with mechanical positioning, infrared induction positioning and electronic control.

[0062] Two boron-doped stress rods 7 are made by doping silicon dioxide with boron by plasma method, and the stress rod 7 made by plasma method has better uniformity. The surface of the stress rods 7 is treated so that the outer diameter of the stress rods 7 is 0.2 mm smaller than the diameter of the stress through hole, and each stress rod 7 is combined wit...

Embodiment 3

[0071] Embodiment 3: The radius of the quartz cladding 1 is 20um.

[0072] The present invention also carries out the research and development of the extremely small polarization-maintaining optical fiber whose cladding radius 1 is 20um. The radius of the core layer 2 is 3.0um, and the relative refractive index difference between the core layer 2 and the quartz cladding layer 1 is 0.6%. The radius of the second quartz cladding ring 3 is 3.3um, and the radius ratio of the second quartz cladding ring 3 to the core layer 2 is 1.1. The radius of the third quartz cladding ring 5 is 4.5um, the radius ratio between the third quartz cladding ring 5 and the core layer 2 is 1.5, and the relative refractive index difference between the third quartz cladding ring 5 and the quartz cladding 1 is -0.5 %. Half of the shortest distance between two stress cat's eyes 4 is 6.0um, and the ratio of half of the shortest distance between two stress cat's eyes 4 to the radius of the core layer 2 is ...

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Abstract

The invention discloses a polarization maintaining optical fiber with a small bending radius and a manufacture method of the polarization maintaining optical fiber and relates to the field of optical fiber manufacture. The polarization maintaining optical fiber comprises a silica cladding, a core layer, a second silica cladding ring, a third fluorine-doped silica cladding ring and two stress cat eyes are sequentially arranged in the silica cladding from inside to outside, and the two stress cat eyes are in central symmetry with the core layer. By means of the manufacture method, the bending radius of the manufactured polarization maintaining optical fiber is smaller than 5mm, operating wavelength of the polarization maintaining optical fiber is 1550nm, and supplementary deterioration of the polarization maintaining optical fiber is under 0.4dB/km. According to the polarization maintaining optical fiber, under the condition that the bending radius is small, low-loss information transmission of the polarization maintaining optical fiber is achieved, low supplementary deterioration and good crosstalk characteristics of the polarization maintaining optical fiber are guaranteed, fiber optic sensors with small sizes can be manufactured by means of the polarization maintaining optical fiber, and requirements of users are satisfied.

Description

technical field [0001] The invention relates to the field of optical fiber manufacturing, in particular to a polarization-maintaining optical fiber with a small bending radius and a manufacturing method thereof. Background technique [0002] PMF (Polarization Maintaining Optical Fiber, polarization maintaining fiber) is referred to as polarization maintaining fiber. With the further development of the field of optical communication, polarization maintaining fiber has been widely used for its excellent birefringence effect and linear polarization maintaining ability. [0003] At present, a relatively common polarization-maintaining optical fiber includes a cladding, a fiber core and a stress addition portion arranged opposite to each other along the radial direction of the fiber core. The relative refractive index difference between the core and the cladding is 0.3%-0.5%, the interval between the opposite stress-applied parts is 6μm-17μm, and the diameter of each stress-added...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/024G02B6/036C03B37/027
CPCC03B37/01217C03B37/02709C03B2203/12C03B2203/31
Inventor 罗文勇李诗愈陈伟柯一礼胡福明莫琦
Owner RUIGUANG TELECOMM TECH CO LTD
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