CN201229414Y - Bar-shaped polarization maintaining fiber - Google Patents
Bar-shaped polarization maintaining fiber Download PDFInfo
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- CN201229414Y CN201229414Y CNU2008201086796U CN200820108679U CN201229414Y CN 201229414 Y CN201229414 Y CN 201229414Y CN U2008201086796 U CNU2008201086796 U CN U2008201086796U CN 200820108679 U CN200820108679 U CN 200820108679U CN 201229414 Y CN201229414 Y CN 201229414Y
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- polarization maintaining
- optical fiber
- maintaining optical
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Abstract
The utility model relates to a bar-shaped polarization maintaining optical fiber which belongs to the field of optical fiber sensing, common Panda-shaped and tie-shaped polarization maintaining optical fibers need to satisfy the using requirements of sensors, such as optical fiber gyros and the like, the percentage which the area of the stressing active region thereof occupies the cross section of the optical fiber is generally larger than 10%, the stressing active region is over large, thereby the manufacturing cost is obviously increased and the manufacturing difficulty is increased, and furthermore, the indexes, such as the temperature performance of optical fiber, the bending performance, and the mechanical intensity and the like, are affected. The cross section structure of the bar-shaped polarization maintaining optical fiber respectively comprises a base pipe layer (11), an outer packing layer (12), a stressing active region (13), an inner packing layer (14) and a sandwich layer (15), the bar-shaped polarization maintaining optical fiber is characterized in that, the shape of the stressing active region (13) is a bar shape, the percentage of the area which the stressing active region (13) occupies that of the cross-sectional of the optical fiber is 3.7% -10%, and the rate between a long shaft and a short shaft is 3.9-6.4. The area of the stress active region of the bar-shaped polarization maintaining optical fiber which is related by the utility model is relatively small, compared with a traditional elliptical packing layer type optical fiber, the utility model has the advantages of big rate between the long shaft and the short shaft and high polarization maintaining performance.
Description
Technical field
The utility model relates to a kind of novel polarization maintaining optical fibre, and promptly excellent type polarization maintaining optical fibre belongs to sensory field of optic fibre.
Background technology
Polarization maintaining optical fibre claims polarization-maintaining fiber again, is a kind of of special optical fiber, and it has a wide range of applications in the communication system and the Fibre Optical Sensor field of wavelength-division multiplex.Especially in the Fibre Optical Sensor field, it is the core sensing component of military sensors such as optical integrated device, polarization-maintaining fiber coupler, optical fibre gyro.
According to the difference of cross-sectional structure, what Shang Yong polarization maintaining optical fibre was common in the world has four types, that is: panda type, knot type, oval cladding type and oval core pattern.First three types belongs to stress induced type, and back one type belongs to shape decision type.The gordian technique of polarization maintaining optical fibre is to make to protect the polarisation rod at present, will protect the wire drawing of polarisation rod again and become polarization maintaining optical fibre.
Guarantor's polarisation rod of stress induced type polarization maintaining optical fibre generally is by mixing around fibre core or placing the high material of some expansion coefficient (as boron, germanium, phosphorus etc.), by certain special processing means, make these doping or put area become non-round symmetry or axisymmetric stress district and make.Boron-doping stress district expansion coefficient height to the fibre core stress application, causes fibre core refractive index difference on two vertical direction in optical fiber, stress district direction refractive index is big, and the vertical direction refractive index is little, Here it is so-called birefringent phenomenon.When light is propagated in such optical fiber, form fast axle and slow axis, two class axles all are called main shaft, and slow axis is consistent with the field of force direction in stress district.
Linearly polarized light is injected on some main shafts of polarization maintaining optical fibre, after one section transmission range, still can keep its polarization state.The parameter that characterizes polarization maintenance performance quality is the polarization cross-talk.The polarization cross-talk is more little, and then guarantor's bias of this polarization maintaining optical fibre can be good more.
The polarization maintaining optical fibre of general panda type and knot type will reach the request for utilization of sensors such as optical fibre gyro, and the area in its stress district accounts for the long-pending ratio of cross section of optic fibre generally greater than 10%.The stress district is excessive, and except manufacturing cost can obviously increase, and manufacture difficulty also can become greatly, in addition, also can influence the indexs such as temperature performance, bending property, physical strength of optical fiber, causes the combination property of polarization maintaining optical fibre not good.
The structure and the manufacture method of oval jacket type (being oval cladding type) preform of Chinese patent and polarization maintaining optical fibre, publication number is CN1410375A, discloses the structure and the manufacture method of oval jacket type preform and polarization maintaining optical fibre; Chinese patent " one " font polarization maintaining optical fibre and production method thereof, publication number is CN1632629A, discloses " one " font polarization maintaining optical fibre and production method thereof.The relative area in the stress district of the excellent type polarization maintaining optical fibre that the utility model relates to is less, and comparing with traditional oval cladding type has the advantage that stress head of district minor axis ratio is big, guarantor's bias can be high.
The utility model content
The purpose of this utility model is to provide a kind of area with new stress district shape, stress district to account for the polarization maintaining optical fibre that the long-pending ratio of cross section of optic fibre is less relatively, guarantor's bias can be good.
The utility model provides a kind of novel polarization maintaining optical fibre, and its cross-sectional structure is respectively from outside to inside: parent tube floor, surrounding layer, stress district, inner cladding and sandwich layer is characterized by: the stress district is shaped as excellent type.
The utility model rod type polarization maintaining optical fibre and two kinds of polarization maintaining optical fibres of background technology have close part: promptly the existing major axis in stress district has minor axis again; Different is, the major axis in the stress district of excellent type polarization maintaining optical fibre of the present utility model and above-mentioned two kinds of polarization maintaining optical fibre thicker, and stressed zone 80% part minor axis dimension deviation is less than 5%, and its stressed zone 80% part minor axis dimension deviation of " one " font and oval cladding type polarization maintaining optical fibre is greater than 15%.The core shape of " one " font polarization maintaining optical fibre cannot be compared indexs such as the long and polarization cross-talk of the bat that can obviously improve polarization maintaining optical fibre with excellent type polarization maintaining optical fibre.
It is less relatively that the area in the stress district of rod type polarization maintaining optical fibre accounts for the long-pending ratio of cross section of optic fibre, is generally less than 10%, can get 3.7%-10%.
The ratio of long axis to short axis in stress district is big, can get 3.9-6.4.Stress district rod type shape near and cube, must guarantee it is arc but add man-hour two, middle 80% part minor axis dimension deviation is less than 5%,
The advantage that the utility model had is:
1, under the identical situation of birefringence effect, excellent type polarization maintaining optical fibre has that the stress district is little, the big characteristics of stress head of district minor axis ratio.
2, excellent type polarization maintaining optical fibre is protected high, the Heat stability is good of bias energy.For polarization maintaining optical fibre, stressed zone major and minor axis ratio is big more, and it protects bias can be good more; The ratio that the stressed zone accounts for the optical fiber cross section is more little, is subjected to surrounding environment influence more little, and thermal stability is high more.
Description of drawings
Fig. 1 is the cross-sectional structure synoptic diagram of the utility model rod type polarization maintaining optical fibre.
Fig. 2 rod type polarization maintaining optical fibre manufacture craft process flow diagram.
Embodiment
Excellent type polarization maintaining optical fibre as shown in Figure 1, its cross-sectional structure is respectively from outside to inside: parent tube floor 11, surrounding layer 12, stress district 13, inner cladding 14 and sandwich layer 15, its stress district 13 is shaped as excellent type.
Embodiment 1: carry out the pre-service of parent tube as shown in Figure 2 on the MCVD lathe, the deposition surrounding layer, the deposition stressor layers, sedimentary inner envoloping layer, the deposition sandwich layer, forward is collapsed, oppositely collapse, operations such as polishing make excellent type and protect the polarisation rod, to protect the drawing-down of polarisation rod then, to become diameter be the optical fiber of 125 μ m, and coat two-layer photo-cured coating in its periphery and protect, coating is handled through ultra-violet curing again, making final coating diameter is the excellent type polarization maintaining optical fibre of 245 μ m, the ratio that the area in the stress district of polarization maintaining optical fibre accounts for the polarization maintaining optical fibre cross-sectional area is 4.1%, the stressed zone axial ratio is 3.9, and middle 80% part minor axis dimension deviation is 2%; The key technical indexes such as the table 1 of this rod type polarization maintaining optical fibre.
Embodiment 2: carry out the pre-service of parent tube as shown in Figure 2 on the MCVD lathe, the deposition surrounding layer, the deposition stressor layers, sedimentary inner envoloping layer, the deposition sandwich layer, forward is collapsed, oppositely collapse, operations such as polishing make excellent type and protect the polarisation rod, to protect the drawing-down of polarisation rod then, to become diameter be the optical fiber of 125 μ m, and coat two-layer photo-cured coating in its periphery and protect, coating is handled through ultra-violet curing again, making final coating diameter is the excellent type polarization maintaining optical fibre of 245 μ m, the ratio that the area in the stress district of polarization maintaining optical fibre accounts for the polarization maintaining optical fibre cross-sectional area is 3.7%, the stressed zone axial ratio is 6.4, and middle 80% part minor axis dimension deviation is 1%; The key technical indexes such as the table 1 of this rod type polarization maintaining optical fibre.
Embodiment 3: carry out the pre-service of parent tube as shown in Figure 2 on the MCVD lathe, the deposition surrounding layer, the deposition stressor layers, sedimentary inner envoloping layer, the deposition sandwich layer, forward is collapsed, oppositely collapse, operations such as polishing make excellent type and protect the polarisation rod, to protect the drawing-down of polarisation rod then, to become diameter be the optical fiber of 125 μ m, and coat two-layer photo-cured coating in its periphery and protect, coating is handled through ultra-violet curing again, making final coating diameter is the excellent type polarization maintaining optical fibre of 245 μ m, the ratio that the area in the stress district of polarization maintaining optical fibre accounts for the polarization maintaining optical fibre cross-sectional area is 10%, the stressed zone axial ratio is 5.7, and middle 80% part minor axis dimension deviation is 1.2%; The key technical indexes such as the table 1 of this rod type polarization maintaining optical fibre.
The key technical indexes of table 1 rod type polarization maintaining optical fibre
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Operation wavelength (nm) | 1310 | 1310 | 1310 |
| Cutoff wavelength (nm) | 1260 | 1272 | 1230 |
| Loss (dB/km) | 1.2 | 1.3 | 1.4 |
| Clap long (mm) | 3.1 | 3.0 | 2.9 |
| The stressed zone axial ratio | 3.9 | 6.4 | 5.7 |
| Stressed zone minor axis dimension deviation (middle 80% part) (%) | 2 | 1 | 1.2 |
| The stressed zone accounts for xsect ratio (%) | 4.1 | 3.7 | 10 |
| The polarization cross-talk (dB, 1km) | -26 | -27 | -26.5 |
| Full temperature polarization cross-talk variable quantity (dB, 1km) | 2.6 | 2.5 | 2.8 |
| Mode field diameter (μ m) | 6.6 | 6.6 | 6.5 |
| Tension force screening (kpsi) | 100 | 100 | 100 |
| Cladding diameter (μ m) | 125 | 125 | 125 |
| Apply diameter (μ m) | 245 | 245 | 245 |
| Operating temperature range (℃) | -45～+75 | -45～+75 | -45～+75 |
Claims (3)
1. excellent type polarization maintaining optical fibre, its cross-sectional structure are respectively parent tube floor (11), surrounding layer (12), stress district (13), inner cladding (14) and sandwich layer (15) from outside to inside, it is characterized in that: stress district (13) be shaped as excellent type.
2. polarization maintaining optical fibre according to claim 1 is characterized in that: the area of stress district (13) accounts for the ratio 3.7%-10% of cross section of optic fibre area.
3. polarization maintaining optical fibre according to claim 1 is characterized in that: the axial ratio of stress district (13) is 3.9-6.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201086796U CN201229414Y (en) | 2008-06-13 | 2008-06-13 | Bar-shaped polarization maintaining fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201086796U CN201229414Y (en) | 2008-06-13 | 2008-06-13 | Bar-shaped polarization maintaining fiber |
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| Publication Number | Publication Date |
|---|---|
| CN201229414Y true CN201229414Y (en) | 2009-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201086796U Expired - Lifetime CN201229414Y (en) | 2008-06-13 | 2008-06-13 | Bar-shaped polarization maintaining fiber |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102295407A (en) * | 2010-06-25 | 2011-12-28 | 北京玻璃研究院 | Manufacturing method of polarization maintaining optical fiber |
| CN103030270A (en) * | 2013-01-06 | 2013-04-10 | 北京一轻研究院 | Method for making bow-shaped polarization maintaining optical fiber for Y waveguide |
| CN103253860A (en) * | 2012-11-15 | 2013-08-21 | 北京一轻研究院 | Manufacture method of elliptical stressed zone type polarization maintaining fiber |
| CN107918169A (en) * | 2017-10-27 | 2018-04-17 | 江苏法尔胜光子有限公司 | Active polarization maintaining optical fibre of line-styled and preparation method thereof |
| CN108461205A (en) * | 2018-01-28 | 2018-08-28 | 南通巨龙新材料科技有限公司 | A kind of novel conductive wire and its application |
| CN111559857A (en) * | 2020-04-22 | 2020-08-21 | 无锡法尔胜光电科技有限公司 | Linear polarization-maintaining optical fiber preform and linear polarization-maintaining optical fiber manufacturing method |
-
2008
- 2008-06-13 CN CNU2008201086796U patent/CN201229414Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102295407A (en) * | 2010-06-25 | 2011-12-28 | 北京玻璃研究院 | Manufacturing method of polarization maintaining optical fiber |
| CN103253860A (en) * | 2012-11-15 | 2013-08-21 | 北京一轻研究院 | Manufacture method of elliptical stressed zone type polarization maintaining fiber |
| CN103253860B (en) * | 2012-11-15 | 2016-05-18 | 北京一轻研究院 | The manufacture method of a kind of oval stressed zone type polarization maintaining optical fibre |
| CN103030270A (en) * | 2013-01-06 | 2013-04-10 | 北京一轻研究院 | Method for making bow-shaped polarization maintaining optical fiber for Y waveguide |
| CN107918169A (en) * | 2017-10-27 | 2018-04-17 | 江苏法尔胜光子有限公司 | Active polarization maintaining optical fibre of line-styled and preparation method thereof |
| CN108461205A (en) * | 2018-01-28 | 2018-08-28 | 南通巨龙新材料科技有限公司 | A kind of novel conductive wire and its application |
| CN111559857A (en) * | 2020-04-22 | 2020-08-21 | 无锡法尔胜光电科技有限公司 | Linear polarization-maintaining optical fiber preform and linear polarization-maintaining optical fiber manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090429 |