CN103268000B - By corroding the interferometer that expanded core fiber is realized - Google Patents
By corroding the interferometer that expanded core fiber is realized Download PDFInfo
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- CN103268000B CN103268000B CN201310214491.5A CN201310214491A CN103268000B CN 103268000 B CN103268000 B CN 103268000B CN 201310214491 A CN201310214491 A CN 201310214491A CN 103268000 B CN103268000 B CN 103268000B
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Abstract
By corroding the interferometer that expanded core fiber is realized, sensory field of optic fibre is particularly suitable for use in.Solve and be currently based on the problem of size that the interferometer of optical fiber structure faced is big, sensitiveness is poor, cost of manufacture is high.The interferometer is included in optical fiber（1）The Kuo Xin areas of upper making（2）And corrosion region（3）.Preparation method：By optical fiber（1）Coating is removed, to optical fiber（1）By optical fiber while heating（1）Two ends are pushed away to centre, make Kuo Xin areas（2）, Kuo Xin areas are radially then corroded with HF solution（2）Middle part, forms corrosion region（3）.The method of heating includes：Spark discharge, CO2Laser is focused on or flame heating.Optical fiber（1）A diameter of D1, Kuo Xin areas（2）Maximum gauge be D2, length is 2L1+L2, corrosion region（3）Length be L2, depth is H.Laser signal is divided into two-way or multichannel during propagation, interferes interference fringe in interferometer output end.
Description
Technical field
The present invention relates to a kind of interferometer, sensory field of optic fibre is particularly suitable for use in.
Background technology
With the progress of optical fiber sensing technology, all kinds of different principles, the sensing device of different structure are continued to bring out, wherein one
The more important Passive Optical Components based on optical fiber structure of class is used widely, here it is MZ interferometers, and its operation principle is
Script optical signal is divided into two-way or multichannel by optical splitter, makes the optical signal do not gone the same way by obstructed path, so as to produce light path
The optical signal do not gone the same way is closed beam by difference, the bundling device in interferometer end again, interference occurs.
Because the fiber lengths between the fringe-width and optical splitter and bundling device of MZ interferometers have direct relation, light
Fine longer, the interference fringe of generation is closeer, and by by stress or temperature parameter act on this section of optical fiber can realize stress or
It is the sensing of temperature.Traditional MZ interferometers based on optical fiber structure are usually two cones of pull-out separated by a distance on optical fiber,
First is bored equivalent to optical splitter, and the optical signal in a fibre core point part is transmitted into covering, and second cone is equivalent to conjunction beam
Device, the optical signal in covering can be reconsolidated to fibre core, finally interfere.The MZ interferometers of this structure make letter
It is single, but be due to the optical fiber needs removing coating between two cones, and keep outer surface to clean, and the length of this section of optical fiber is usual
All longer, sensitiveness is low during for sensor field so that be restricted in actual applications.Another is by two cones point
Do not replaced with LPFG, LPFG therein serve by optical signal from fibre core coupled to covering and from
Covering is coupled back into the effect of fibre core.This MZ interferometers need the write device of fiber grating, and cost is very high.Also some other
The optical fiber MZ interferometer of structure needs to use special optical fiber, and its cost of manufacture is even more to greatly improve.
In summary, being currently based on the interferometer problem encountered of optical fiber structure is：Size is big, sensitiveness is poor, make
Cost is high.
The content of the invention
The technical problems to be solved by the invention are：
Being currently based on the interferometer problem encountered of optical fiber structure is：Size is big, sensitiveness is poor, cost of manufacture is high.
The technical scheme is that：
By corroding the interferometer that expanded core fiber is realized, the interferometer is included in the Kuo Xin areas 2 made on optical fiber 1 and corrosion
Area 3.
Preparation method：Optical fiber 1 is removed into coating, pushed away at the two ends of optical fiber 1 to centre while being heated to optical fiber 1, is made
Kuo Xin areas 2, then radially corrode the middle part of Kuo Xin areas 2 with HF solution, form corrosion region 3.The method of heating includes：Electric spark is put
Electricity, CO2Laser is focused on or flame heating.
The a diameter of D of optical fiber 11, the maximum gauge in Kuo Xin areas 2 is D2, length is 2L1+L2, the length of corrosion region 3 is L2, depth
For H.
D1=50~500 μm.
D2=1.1D1~10D1。
L1=0.5D1~10D1。
L2=0.5L1~5L1。
0.1D2≤H<0.5D2。
The present invention is compared with prior art to be had the advantage that：
No matter the interferometer made in the method for making Kuo Xin areas on optical fiber and then corroding is in radial direction or axial chi
It is very little all sufficiently small, so that the measurement to gaseous state or liquid refractive index only needs to seldom dosage.Compared to tradition at least
Several centimetres, the at most sensing arrangement of several tens cm dimensionally has reduction by a relatively large margin.And corrode out corrosion region by
In radial dimension very little, fibre cladding is very thin or completely without fibre cladding so that the transmission state of laser is treated to surrounding
The variations in refractive index for surveying thing is very sensitive, increases susceptibility, and manufacturing process is simple, and cost is low.
Brief description of the drawings
The interferometer structure figure of Fig. 1 etch away parts coverings.
The propagation schematic diagram of the interferometer signal of Fig. 2 etch away parts coverings.
Fig. 3 erodes the interferometer structure figure of whole coverings.
Fig. 4 erodes the propagation schematic diagram of the interferometer signal of whole coverings.
The interferometer structure figure of Fig. 5 etch away parts fibre cores.
The propagation schematic diagram of the interferometer signal of Fig. 6 etch away parts fibre cores.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Embodiment
By corroding the interferometer that expanded core fiber is realized, as shown in Figure 1, it is characterised in that：The interferometer is included in optical fiber 1
The Kuo Xin areas 2 of upper making and corrosion region 3.
Preparation method：Optical fiber 1 is removed into coating, pushed away at the two ends of optical fiber 1 to centre while being heated to optical fiber 1, is made
Kuo Xin areas 2, then radially corrode the middle part of Kuo Xin areas 2 with HF solution, form corrosion region 3.The method of heating includes：Electric spark is put
Electricity, CO2Laser is focused on or flame heating.
The a diameter of D of optical fiber 11, the maximum gauge in Kuo Xin areas 2 is D2, length is 2L1+L2, the length of corrosion region 3 is L2, depth
For H.
D1=50~500 μm.
D2=1.1D1~10D1。
L1=0.5D1~10D1。
L2=0.5L1~5L1。
0.1D2≤H<0.5D2。
When the depth of corrosion is less than the cladding thickness in Kuo Xin areas 2, as shown in figure 1, the propagation path of light is such as in interferometer
Shown in Fig. 2, laser signal is divided into two-way after entering Kuo Xin areas 2, wherein keeping propagating in fibre core all the way, another road is in covering
Propagate, continue after propagating, the optical signal in covering is divided into two-way again, continue to propagate in covering all the way, another road is coupled
Corrosion region 3 outside to optical fiber.The experience process opposite with entering interferometer when light continues to propagate, finally in the another of interferometer
End is interfered, and produces interference fringe.
When the depth of corrosion is equal to the cladding thickness in Kuo Xin areas 2, as shown in figure 3, the propagation path of light is such as in interferometer
Shown in Fig. 4, laser signal is divided into two-way after entering Kuo Xin areas 2, wherein keeping propagating in fibre core all the way, another road is in covering
Propagate, continue after propagating, the optical signal in covering is coupled to corrosion region 3.When light continues to propagate, experience is with entering interferometer
Opposite process, is finally interfered in the other end of interferometer, produces interference fringe.
When the depth of corrosion is more than the cladding thickness in Kuo Xin areas 2, as shown in figure 5, the propagation path of light is such as in interferometer
Shown in Fig. 6, laser signal is divided into two-way after entering Kuo Xin areas 2, wherein keeping propagating in fibre core all the way, another road is in covering
Propagate, continue after propagating, the optical signal that the optical signal in covering is coupled in corrosion region 3, fibre core is divided into two-way, all the way by coupling
Corrosion region 3 is closed, another road continues to propagate in fibre core.The experience process opposite with entering interferometer when light continues to propagate,
The final other end in interferometer is interfered, and produces interference fringe.
Claims (1)
1. by corroding the interferometer that expanded core fiber is realized, it is characterised in that：The interferometer is included in the expansion made on optical fiber (1)
Core area (2) and corrosion region (3)；
Preparation method：Optical fiber (1) is removed and coated, pushes away at optical fiber (1) two ends to centre while being heated to optical fiber (1), is made
Zuo Kuoxin areas (2), are then radially corroded in the middle part of Kuo Xin areas (2) with HF solution, form corrosion region (3)；The method of heating includes：
Spark discharge, CO2Laser is focused on or flame heating；
Optical fiber (1) a diameter of D1, the maximum gauge of Kuo Xin areas (2) is D2, Kuo Xin areas (2) length is 2L1+L2, the length of corrosion region (3)
Spend for L2, depth is H；
D1=50~500 μm；
D2=1.1D1~10D1；
L1=0.5D1~10D1；
L2=0.5L1~5L1；
0.1D2≤H<0.5D2。
Priority Applications (1)
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| CN201310214491.5A CN103268000B (en) | 2013-06-01 | 2013-06-01 | By corroding the interferometer that expanded core fiber is realized |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310214491.5A CN103268000B (en) | 2013-06-01 | 2013-06-01 | By corroding the interferometer that expanded core fiber is realized |
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| CN103268000A CN103268000A (en) | 2013-08-28 |
| CN103268000B true CN103268000B (en) | 2017-10-31 |
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Citations (9)
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| JPH0588022A (en) * | 1991-09-26 | 1993-04-09 | Kyocera Corp | Optical fixed attenuator |
| CN2282180Y (en) * | 1996-10-05 | 1998-05-20 | 冯越 | Optical fiber temperature sensor |
| CA2306305A1 (en) * | 1999-04-23 | 2000-10-23 | Jds Uniphase Inc. | Optical attenuator and method of making same |
| KR20070102087A (en) * | 2006-04-13 | 2007-10-18 | 김광택 | Short wavelength filter with thermally expanded cored fiber |
| CN101963683A (en) * | 2010-08-09 | 2011-02-02 | 电子科技大学 | Band-pass filtering method of mechanical adjustable pi-phase shift period structure and band-pass filter adopting same |
| CN101979963A (en) * | 2010-09-14 | 2011-02-23 | 北京理工大学 | Integrally molded fiber microsensor and manufacturing method thereof |
| CN102436030A (en) * | 2010-09-29 | 2012-05-02 | 日立电线株式会社 | Optical fiber end processing method and optical fiber end processing apparatus |
| JP2012118276A (en) * | 2010-11-30 | 2012-06-21 | Sumitomo Electric Ind Ltd | Optical semiconductor device |
| CN102662218A (en) * | 2012-05-31 | 2012-09-12 | 东南大学 | Wrinkle type apodization waveguide Bragg grating filter and manufacturing method thereof |
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2013
- 2013-06-01 CN CN201310214491.5A patent/CN103268000B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0588022A (en) * | 1991-09-26 | 1993-04-09 | Kyocera Corp | Optical fixed attenuator |
| CN2282180Y (en) * | 1996-10-05 | 1998-05-20 | 冯越 | Optical fiber temperature sensor |
| CA2306305A1 (en) * | 1999-04-23 | 2000-10-23 | Jds Uniphase Inc. | Optical attenuator and method of making same |
| KR20070102087A (en) * | 2006-04-13 | 2007-10-18 | 김광택 | Short wavelength filter with thermally expanded cored fiber |
| CN101963683A (en) * | 2010-08-09 | 2011-02-02 | 电子科技大学 | Band-pass filtering method of mechanical adjustable pi-phase shift period structure and band-pass filter adopting same |
| CN101979963A (en) * | 2010-09-14 | 2011-02-23 | 北京理工大学 | Integrally molded fiber microsensor and manufacturing method thereof |
| CN102436030A (en) * | 2010-09-29 | 2012-05-02 | 日立电线株式会社 | Optical fiber end processing method and optical fiber end processing apparatus |
| JP2012118276A (en) * | 2010-11-30 | 2012-06-21 | Sumitomo Electric Ind Ltd | Optical semiconductor device |
| CN102662218A (en) * | 2012-05-31 | 2012-09-12 | 东南大学 | Wrinkle type apodization waveguide Bragg grating filter and manufacturing method thereof |
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| 包层腐蚀长周期光纤光栅对的光谱特性研究;丁金妃等;《浙江大学学报(工学版)》;20070330;第41卷(第03期);537-539 * |
| 飞秒激光加工的微型光纤法布里-珀罗干涉传感器;王维等;《中国激光》;20071210;第34卷(第12期);1660-1664 * |
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