CN108318973A - A kind of the Raman wavelength division multiplexer and its manufacture craft of DTS - Google Patents
A kind of the Raman wavelength division multiplexer and its manufacture craft of DTS Download PDFInfo
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- CN108318973A CN108318973A CN201810282669.2A CN201810282669A CN108318973A CN 108318973 A CN108318973 A CN 108318973A CN 201810282669 A CN201810282669 A CN 201810282669A CN 108318973 A CN108318973 A CN 108318973A
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- Prior art keywords
- wavelength division
- lens
- division multiplexer
- pass filter
- autocollimator
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- 238000001069 Raman spectroscopy Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title abstract description 7
- 239000013307 optical fiber Substances 0.000 claims abstract description 16
- 239000011521 glass Substances 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 238000005538 encapsulation Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000010561 standard procedure Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims 2
- 230000008018 melting Effects 0.000 claims 2
- 238000000034 method Methods 0.000 claims 2
- 230000009977 dual effect Effects 0.000 abstract description 5
- 238000000253 optical time-domain reflectometry Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 241000931526 Acer campestre Species 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/324—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres using Raman scattering
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/29389—Bandpass filtering, e.g. 1x1 device rejecting or passing certain wavelengths
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses the Raman wavelength division multiplexers and its manufacture craft of a kind of DTS.The first fused tapered wavelength division multiplexer in the present invention is 1310nm/1650nm wavelength division multiplexers, and public output and C lens lens adjust to form single autocollimator.Second fused tapered wavelength division multiplexer is 1450nm/1550nm wavelength division multiplexers, and public output combines G lens lens with tail optical fiber and band pass filter forms twin-core autocollimator；The G lens lens, band pass filter, C lens lens packages are in glass round tube.The present invention only needs a band pass filter, a twin-core collimator, a single collimator to reduce the workload being coupled and aligned, can also be more than the bandwidth of ± 10nm easily；Being additionally provided with the additional ports 1310nm can realize that the system breakpoint fault that dual wavelength combines is identified with the ports 1550nm.
Description
Technical field
The invention belongs to distributed fiber-optic sensor technical fields, especially relate to a kind of DTS Raman wavelength division multiplexer and its
Manufacture craft.
Background technology
Distributed optical fiber Raman temperature sensor（distributed optical fiber temperature, DTS）
It transmits the spontaneous Raman effect of generation in a fiber using laser pulse and combines optical time domain reflection technology（OTDR）Realize long distance
From measuring and monitoring, have many advantages, such as that wide measurement range, spatial resolution and measurement accuracy are higher.Specifically along transmission light
Fine reflected pulsed light includes stokes light（It is longer than original optical maser wavelength）, anti-Stokes light（Than original laser
Wavelength is short）And Reyleith scanttering light（Former optical maser wavelength）Equal signals, wherein anti-Stokes light is particularly sensitive to temperature, stokes light
To temperature-insensitive, therefore, people usually use stokes light to demodulate temperature from anti-Stokes light in turn as with reference to light
Spend information.DTS needs the Raman wavelength division multiplexer of a 1x3 that above-mentioned three kinds of wavelength are effectively separately prevented crosstalk.Existing DTS
Raman wavelength division multiplexer usually combines realization by the film-type wavelength division multiplexer of two 1x2, its each channel width is less than etc.
In ± 10nm, it is easy to make the useful signal of system to be filtered out so that the noise of system is poor, and needs two different wave lengths
The band pass filter of range, two twin-core fiber collimators, two single-core fiber collimators, is coupled and aligned relatively time-consuming.In addition,
The not additional wavelength port of existing Raman wavelength division multiplexer judges Transmission system for realizing the OTDR identifications of dual wavelength
Failure.Therefore, a kind of miniaturization of invention, easy to operate, band, which are wider than ± 10nm and provide additional port, realizes dual wavelength OTDR
The DTS Raman wavelength division multiplexers of fault identification are of great significance.
Invention content
In view of the deficiencies of the prior art, the present invention provides the Raman wavelength division multiplexers and its manufacture craft of a kind of DTS.
Raman wavelength division multiplexer in the present invention is the Raman wavelength division multiplexer of 1 × 4 structure, including the first fused biconical taper
Type wavelength division multiplexer, glass round tube, G-lens lens, band pass filter, C-lens lens and the second fused tapered wavelength-division are multiple
Use device.The first fused tapered wavelength division multiplexer is the 1310nm/1650nm wavelength division multiplexers of 1 × 2 structure, public defeated
Outlet and C-lens lens adjust to form single autocollimator, the transmission end as band pass filter.Second fused biconical taper
Type wavelength division multiplexer is the 1450nm/1550nm wavelength division multiplexers of 1 × 2 structure, and public output combines G-lens with tail optical fiber
Lens and band pass filter form twin-core autocollimator, wherein reflection end of the tail optical fiber as band pass filter；The G-lens
Lens, band pass filter, C-lens lens packages are in glass round tube.
The manufacture craft of above-mentioned Raman wavelength division multiplexer：Pass through fused biconical taper standard technology one 1 × 2 structure of preparation
The 1450nm/1550nm wavelength division multiplexers of 1310nm/1650nm wavelength division multiplexers and 1 × 2 structure, by above-mentioned two wavelength-division
The output end tail optical fiber of multiplexer divests a part, is used in combination cutter cutting end face to retain length and is used to prepare optical fiber collimator.So
Afterwards by the output end of the 1310nm/1650nm wavelength division multiplexers of 1 × 2 structure and C-lens lens optical precision adjustment frame pair
It adjusts so that meet Insertion Loss requirement and form single autocollimator.G-lens lens and band pass filter are bonded, and again by light
Learn accurate adjustment frame and the output end of 1450nm/1550nm wavelength division multiplexers and the public output tune of Raman wavelength division multiplexer
Section meets Insertion Loss condition and forms twin-core autocollimator.Single autocollimator and twin-core autocollimator are finally inserted into glass round tube,
It is exchanged by optical precision adjustment frame and is coupled into device, and injected silica gel and fix.
The advantages of the present invention over the prior art are that：1, a band pass filter is only needed, a twin-core collimator, one
A single collimator, reduces the workload being coupled and aligned；2, the bandwidth of ± 10nm can be more than easily；3, volume is provided
The outer ports 1310nm can realize that the system breakpoint fault that dual wavelength combines is identified with the ports 1550nm.
Description of the drawings
Fig. 1 is the single unit system schematic diagram of the DTS Raman wavelength division multiplexers of the present invention.
Specific implementation mode
As shown in Figure 1, realizing that the device of the Raman wavelength division multiplexer of DTS includes fused tapered wavelength division multiplexer 1, glass
Pipe 2, G-lens lens 3, band pass filter 4, C-lens lens 5, fused tapered wavelength division multiplexer 6, encapsulation box pedestal 7
With the sealing upper cover plate 8 with mounting hole.The fused tapered wavelength division multiplexer 1 has input terminal 11,12 and public output
End 15.The fused tapered wavelength division multiplexer 6 has input terminal 13,14 and public output 9.The fused tapered wave
Public output 15 and C-lens lens 5 adjusting of division multiplexer 1 form single autocollimator, the transmission as band pass filter
End.The output end 9 of the fused tapered wavelength division multiplexer 6 combines G-lens lens 3 with tail optical fiber 10 and band pass filter is formed
Twin-core autocollimator, wherein reflection end of the tail optical fiber 10 as band pass filter.The fused tapered wavelength division multiplexer 1 and wavelength-division
Multiplexer 2 and glass round tube 2 are fixed on encapsulation box pedestal 7.
The manufacture craft of DTS Raman wavelength division multiplexers includes the following steps：
（1）In view of fused biconical taper optical fiber is readily available the wavelength-division multiplex of bandwidth ± 15nm, low insertion loss, high-isolation
Device, and the channel wavelength interval being multiplexed is bigger more easy to implement.In addition, the dual wavelength that OTDR is used be respectively 1310nm and
1550nm.Since DTS has existed 1550nm input wavelengths port, it need to only reserve 1310 input ports and fused biconical taper reality can be used
The 1310nm/1650nm wavelength division multiplexers and 1450nm/1550nm wavelength division multiplexers of existing 1x2, therefore pass through fused biconical taper standard
Technique prepares one 1 × 2 1310nm/1650nm wavelength division multiplexer 1 and one 1 × 2 1450nm/1550nm wavelength division multiplexer
6, and the output end tail optical fiber of above-mentioned two wavelength division multiplexer is divested into 2.5cm and retains the length of 1cm with cutter cutting end face
It is used to prepare optical fiber collimator.Then by the output end 15 of wavelength division multiplexer 1 and the optical precision adjustment frame pair of C-lens lens 5
It adjusts so that meeting Insertion Loss requirement forms single collimator.G-lens lens 3 and band pass filter 4 are bonded, and again by light
The adjusting of public output 10 for learning the output end 9 and Raman wavelength division multiplexer of accurate adjustment frame and wavelength division multiplexer 6 meets Insertion Loss
Condition forms twin-core autocollimator.By output end 9 for receiving the reflected light of band pass filter, output end 15 is used for transmission
Band pass filter by transmission light.Single collimator and twin-core collimator are finally inserted into glass round tube 2 and pass through optical precision
Adjustment frame, which is exchanged, is coupled into device, and injects silica gel and fix.
Stability, reliability in view of device, by above-mentioned packaged glass round tube 2, fused biconical taper wavelength division multiplexer 1
Encapsulation, which is arranged, with the fiber optic disc around of fused biconical taper wavelength division multiplexer 6 is fixed on the metal box that size is 100mm × 80mm × 10mm
On sub- pedestal, the Raman wavelength division multiplexer of 1 × 4 port is ultimately formed, port 10-14 corresponds respectively to common end（It supports
Tetra- wavelength of 1310nm, 1450nm, 1550nm, 1650nm）, 1310nm, 1650nm, 1450nm and 1550nm wavelength.
Claims (4)
1. it is the Raman wavelength division multiplexer of 1 × 4 structure the Raman wavelength division multiplexer of DTS a kind of, which is characterized in that including the
One fused tapered wavelength division multiplexer, glass round tube, G-lens lens, band pass filter, C-lens lens and the second melting are drawn
Tapered wavelength division multiplexer；The first fused tapered wavelength division multiplexer is the 1310nm/1650nm wavelength-division multiplex of 1 × 2 structure
Device, public output and C-lens lens adjust to form single autocollimator, the transmission end as band pass filter；Described
Two fused tapered wavelength division multiplexers are the 1450nm/1550nm wavelength division multiplexers of 1 × 2 structure, public output and tail optical fiber
Joint G-lens lens and band pass filter form twin-core autocollimator, wherein reflection end of the tail optical fiber as band pass filter；Institute
The G-lens lens stated, band pass filter, C-lens lens packages are in glass round tube.
2. the Raman wavelength division multiplexer of DTS according to claim 1 a kind of, which is characterized in that first melting is drawn
Tapered wavelength division multiplexer, the second fused tapered wavelength division multiplexer and glass round tube are fixed on encapsulation box pedestal, the encapsulation
Box is with sealing upper cover plate.
3. a kind of technique making Raman wavelength division multiplexer as described in claim 1, it is characterised in that：Pass through fused biconical taper standard
Technique prepares the 1450nm/1550nm waves of the 1310nm/1650nm wavelength division multiplexers and 1 × 2 structure of 1 × 2 structure
The output end tail optical fiber of above-mentioned two wavelength division multiplexer is divested a part by division multiplexer, and cutter cutting end face is used in combination to retain length
Degree is used to prepare optical fiber collimator；Then by the output end and C-lens of the 1310nm/1650nm wavelength division multiplexers of 1 × 2 structure
Lens are exchanged with optical precision adjustment frame so that are met Insertion Loss requirement and formed single autocollimator；By G-lens lens and band logical
Filter plate bonds, and again by the output end and Raman wave of optical precision adjustment frame and 1450nm/1550nm wavelength division multiplexers
The public output of division multiplexer is adjusted, and is met Insertion Loss condition and is formed twin-core autocollimator；Finally by single autocollimator and double
Core autocollimator is inserted into glass round tube, is exchanged by optical precision adjustment frame and is coupled into device, and injected silica gel and fix.
4. technique according to claim 3, it is characterised in that：By above-mentioned packaged glass round tube, 1310nm/1650nm
It is 100mm × 80mm that the fiber optic disc around of wavelength division multiplexer and 1450nm/1550nm wavelength division multiplexers, which arranges encapsulation and is fixed on size,
On the metal box pedestal of × 10mm, ultimately form the Raman wavelength division multiplexer of 1 × 4 structure, Raman wavelength division multiplexer it is public
Output end supports tetra- wavelength of 1310nm, 1450nm, 1550nm, 1650nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810282669.2A CN108318973A (en) | 2018-04-02 | 2018-04-02 | A kind of the Raman wavelength division multiplexer and its manufacture craft of DTS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810282669.2A CN108318973A (en) | 2018-04-02 | 2018-04-02 | A kind of the Raman wavelength division multiplexer and its manufacture craft of DTS |
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| Publication Number | Publication Date |
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| CN108318973A true CN108318973A (en) | 2018-07-24 |
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| CN201810282669.2A Pending CN108318973A (en) | 2018-04-02 | 2018-04-02 | A kind of the Raman wavelength division multiplexer and its manufacture craft of DTS |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101162175A (en) * | 2007-11-15 | 2008-04-16 | 中国计量学院 | Ultra-remote distributed fiber raman photons temperature sensor integrated with raman amplifier |
| CN102012284A (en) * | 2010-11-11 | 2011-04-13 | 金海新源电气江苏有限公司 | Photoelectronic device for distributed optical fiber temperature sensor |
| CN102081197A (en) * | 2010-11-11 | 2011-06-01 | 金海新源电气江苏有限公司 | Wavelength division multiplexer |
| CN102253454A (en) * | 2011-04-07 | 2011-11-23 | 杭州山旭光电有限公司 | All-optical fiber light splitting device |
| CN204788432U (en) * | 2015-07-11 | 2015-11-18 | 苏州至禅光纤传感技术有限公司 | Realize device of full fiber optic distributed many reference amounts sensing |
| CN207965213U (en) * | 2018-04-02 | 2018-10-12 | 浙江师范大学 | A kind of Raman wavelength division multiplexer of DTS |
-
2018
- 2018-04-02 CN CN201810282669.2A patent/CN108318973A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101162175A (en) * | 2007-11-15 | 2008-04-16 | 中国计量学院 | Ultra-remote distributed fiber raman photons temperature sensor integrated with raman amplifier |
| CN102012284A (en) * | 2010-11-11 | 2011-04-13 | 金海新源电气江苏有限公司 | Photoelectronic device for distributed optical fiber temperature sensor |
| CN102081197A (en) * | 2010-11-11 | 2011-06-01 | 金海新源电气江苏有限公司 | Wavelength division multiplexer |
| CN102253454A (en) * | 2011-04-07 | 2011-11-23 | 杭州山旭光电有限公司 | All-optical fiber light splitting device |
| CN204788432U (en) * | 2015-07-11 | 2015-11-18 | 苏州至禅光纤传感技术有限公司 | Realize device of full fiber optic distributed many reference amounts sensing |
| CN207965213U (en) * | 2018-04-02 | 2018-10-12 | 浙江师范大学 | A kind of Raman wavelength division multiplexer of DTS |
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