CN107966765A - A wide range of continuously adjustable optical fiber delay line device - Google Patents
A wide range of continuously adjustable optical fiber delay line device Download PDFInfo
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- CN107966765A CN107966765A CN201711391081.2A CN201711391081A CN107966765A CN 107966765 A CN107966765 A CN 107966765A CN 201711391081 A CN201711391081 A CN 201711391081A CN 107966765 A CN107966765 A CN 107966765A
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- optical fiber
- heat sink
- wrapping post
- layer metal
- delay line
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- 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
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2861—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using fibre optic delay lines and optical elements associated with them, e.g. for use in signal processing, e.g. filtering
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
A kind of a wide range of continuously adjustable optical fiber delay line device, including：Wrapping post, optical fiber, outer layer metal shell, semiconductor thermoelectric refrigeration device, heat shield, heat sink and thermistor；The window stretched out for heat sink is equipped with the outer layer metal shell；The groove for Optical Fiber Winding is equipped with the wrapping post, the Optical Fiber Winding is on the wrapping post, the wrapping post is hollow cylindrical, the semiconductor cooler is placed in one in sky, optical fiber is heated and freezed by applying electric current, the wrapping post is encapsulated in the outer layer metal shell, heat shield is additionally provided between the outer layer metal shell and optical fiber, the heat sink is arranged on semiconductor cooler outer end, and outside naked exposed on external layer metal-back, the thermistor is close to heat sink.The present invention can realize light delay amount continuously adjustable on a large scale, and high with precision, and fast response time is compact-sized, the advantages such as cost is low.
Description
Technical field
The present invention relates to variable fibre delay line, particularly a kind of a wide range of continuously adjustable optical fiber delay line device can quilt
It is widely used in temporal frequency and transmits the fields such as Compare System, Fibre Optical Sensor and optical measuring system, optical fiber telecommunications system.
Background technology
Fibre delay line important role in high-precision optical information processing technology, with traditional delay line (electric delay
Line etc.) compare, fibre delay line have working frequency it is high, with it is roomy, retardation is big, loss is low, anti-electromagnetic interference capability is strong, knot
The advantages that structure is simple, so being widely used in temporal frequency transmits Compare System, Fibre Optical Sensor and optical measuring system, optical fiber
The fields such as communication system.
For optical fiber delay line apparatus, basic principle is to be controlled by varying light in the passage time of inside of optical fibre
The optical time delay amount arrived.Irwin L.Newberg etc. propose a kind of fiber delay line of switching mode (first technology [1] U.S.
The patent No. 647,673), basic structure includes a plurality of path of different length optical fiber, and optical fibre channel is selected by photoswitch, from
And realize the different delays time.The advantage of this kind of fibre delay line is large-scale integrated easy to implement, but delay adjusting is smart
The resolution ratio spent be subject to minimal time delay unit is limited, and can not realize the continuously adjustable of time delay.It is big in delay adjusting scope and adjust
The higher application scenario of required precision is saved, in long-distance optical fiber time-frequency transmission system, since the environment temperature of fiber link becomes
Change, the factor such as external mechanical disturbance, larger delay variation can be produced in fiber link.In order to realize high precision high stability degree
Time frequency signal transmission to fiber optic link noise using fibre delay line, it is necessary to carry out large scale and high accuracy real-Time Compensation, optical fiber prolongs
The delay adjusting precision of slow line needs to reach subpicosecond even femtosecond magnitude, it is therefore necessary to using continuously adjustable on a large scale
Fibre delay line.
In order to realize the continuous a wide range of adjustable of optical time delay, Liu Qin etc. proposes a kind of voltage-controlled optical fiber continuous on a large scale
Delay line (first technology [2] GF patents of invention ZL 201318002196.4), carries out optical fiber by semiconductor heat electric refrigerator
Heat and freeze continuously to change delay volume of the light in optical fiber.In the design of first technology 2, semiconductor heat electric refrigerator is put
The surrounding in fiber optic loop is put, the heat that semiconductor heat electric refrigerator produces is transmitted on optical fiber by a becket.This sets
Meter needs the optical fiber of fiber optic loop outermost to be close to becket, could realize preferable heat-conducting effect, the coiling work to optical fiber
Skill is more demanding, adds around fine difficulty, and when technique for coiling is relatively low, optical fiber can not be close to heat-conducting metal ring, and delay line is led
Hot property substantially reduces.The becket of optical fiber is fitted closely at the same time, can be because the huge frictional force produced during assembling
The peripheral optical fiber of abrasion, or even cause the fracture of optical fiber.In addition, the surrounding of whole device is equipped with substantial amounts of heat sink, this is serious
The volume of device is added, increases radiator design complexities.
The content of the invention
It is an object of the invention to overcome the shortcomings of above-mentioned formerly technology, a kind of a wide range of continuously adjustable optical fiber delay is proposed
Line apparatus, the device are added by improving semiconductor heat electric refrigerator heating location and radiating mode in first technology 2 improving
Heat and while refrigerating efficiency, greatly reduces the volume of whole device, and the design whole device for passing through structure
Assembly complexity declines, and is easy to radiate by air-cooled realize.
The basic principle of the present invention is as follows：
The time delay of light in a fiber is represented by
τ=Δ t=L/v=Ln/c (1)
Wherein L is fiber lengths, and n is optical fibre refractivity, and c is the light velocity.As can be seen that changing fiber lengths from (1) formula
And optical fibre refractivity, it is possible to change the time delay of light in a fiber.
When fiber optic temperature changes, the length and refractive index of optical fiber can all change, therefore the present invention is by varying light
Fine temperature changes the purpose of light time delay amount to realize.Optical-fiber time-delay amount variation with temperature relation can be expressed as
Wherein α=(dL/dT)/L represents optical fiber thermal coefficient of expansion, and ξ=(dn/dT)/n represents the thermo-optical coeffecient of optical fiber, (2)
Section 1 illustrates the change that temperature causes fiber lengths change to cause delay volume in formula, and Section 2 illustrates that temperature causes optical fibre refractivity to become
Change the change for causing retardation.
When the excursion of environment temperature is little, the thermal coefficient of expansion and thermo-optical coeffecient of optical fiber are substantially constant, respectively
For 5.5 × 10-7With 6.8 × 10-6, it can be seen that thermal coefficient of expansion is much smaller than thermo-optical coeffecient, so fiber optic temperature change is mainly led
Induced refractive index changes, so as to cause the change of optical-fiber time-delay amount by the Section 2 of (2) formula.By (2) formula, if used
50 DEG C of 1km optical fiber and temperature change, then the Delay Variation of 1.798ns can be caused, if using 5km optical fiber and temperature change 25
DEG C, then the Delay Variation of 4.496ns can be caused.It can be seen that it can be realized by varying this method of fiber optic temperature larger
Delay volume.
The technical solution of the present invention is as follows：
A kind of a wide range of continuously adjustable optical fiber delay line device, its feature be, including：Wrapping post, optical fiber, outer layer metal
Shell, semiconductor thermoelectric refrigeration device, heat shield, heat sink and thermistor；
The window stretched out for heat sink is equipped with the outer layer metal shell；
The groove for Optical Fiber Winding is equipped with the wrapping post, the Optical Fiber Winding is described on the wrapping post
Wrapping post be hollow cylindrical, the semiconductor cooler is placed in one in sky, and optical fiber is added by applying electric current
Heat and refrigeration, the wrapping post are encapsulated in the outer layer metal shell, are additionally provided between the outer layer metal shell and optical fiber
Heat shield, for the insulation of optical fiber, the heat sink is arranged on semiconductor cooler outer end, and naked exposed on external layer metal-back
Outside, the thermistor is close to heat sink, for detecting the temperature of heat sink.
The heat sink is the metal material of dentation, for radiating to semiconductor cooler.
The heat shield is high-temperature resistant thermal insulating material.
The wrapping post is made of columned aluminum metal, and surface is machined with the groove of releasable deformational stress.
Compared with first technology, the present invention has the advantages that：
1st, compared with first technology [1], a wide range of continuously adjustable optical fiber delay line device of the invention is by varying optical fiber
Temperature controls optical time delay amount, it is possible to achieve the continuous precise of optical time delay is adjustable on a large scale.
2nd, compared with first technology [2], a wide range of continuously adjustable optical fiber delay line device of the invention is by using partly leading
Inner ring heating and the mode of heat dissipation of the body heat electric refrigerator in fiber optic loop, reduce while heating and refrigerating efficiency is improved
Requirement of the whole device to optical fiber technique for coiling and system assembly technology.In addition heat sink is placed in inside fiber optic loop by the device,
The space availability ratio of whole delay line is improved, greatly reduces the volume of whole device, and is made by the design of structure whole
Body is easy to radiate by air-cooled realize.
Brief description of the drawings
Fig. 1 is the explosive view of a wide range of continuously adjustable optical fiber delay line device of the invention.
Fig. 2 is the encapsulation figure of a wide range of continuously adjustable optical fiber delay line device of the invention.
Embodiment
The present invention is further described with reference to example and attached drawing, but the protection model of the present invention should not be limited with this
Enclose.
First referring to Fig. 1, Fig. 1 is the explosive view of a wide range of continuously adjustable optical fiber delay line device of the invention.As seen from the figure,
A wide range of continuously adjustable optical fiber delay line device of the invention, including wrapping post 1, optical fiber 2, outer envelope metal derby 3, semiconductor heat
Electric refrigerator 4, heat shield 5, heat sink 6, thermistor 7.The wrapping post 1 is made of columned aluminum metal, above
With the groove for being machined with releasable deformational stress.2 uniform winding of optical fiber is on wrapping post 1, the semiconductor refrigerating
Device 4 is between heat sink 6 and wrapping post 1, and the heat sink 6 forms for the metal material of dentation, for by semiconductor system
Cooler 4 carries out good heat radiating.The heat shield 5 is made of heat safe heat-insulating material, in outer envelope metal 3 and optical fiber
Between 2, the insulation for optical fiber 2.The thermistor 7 is close to heat sink 6, for detecting the temperature of heat sink 6.Work as device
During work, by that can be heated or be freezed to change to optical fiber by electric current, semiconductor cooler 4 to semiconductor cooler 4
Become the temperature of optical fiber 2, and then change the time delay of whole system, while whole device is realized by heat sink 6 and is radiated.
The a wide range of continuously adjustable optical fiber delay line device of the present invention is by using semiconductor heat electric refrigerator in fiber optic loop
Inner ring heats the mode with heat dissipation.Whole device is reduced while heating and refrigerating efficiency is improved to optical fiber technique for coiling
With the requirement of system assembly technology.In addition heat sink is placed in inside fiber optic loop by the device, improves the space of whole delay line
Utilization rate, greatly reduces the volume of whole device, and makes entirety be easy to radiate by the design of structure.Further lifting dress
Performance is put, better meets the needs of correlation engineering application.It the composite can be widely applied to temporal frequency and transmit Compare System, light
The field such as fibre sensing and optical measuring system, optical fiber telecommunications system.
Claims (4)
- A kind of 1. a wide range of continuously adjustable optical fiber delay line device, it is characterised in that including：Wrapping post, optical fiber, outer layer metal Shell, semiconductor thermoelectric refrigeration device, heat shield, heat sink and thermistor；The window stretched out for heat sink is equipped with the outer layer metal shell；On the wrapping post be equipped with for Optical Fiber Winding groove, the Optical Fiber Winding on the wrapping post, it is described around Terminal is hollow cylindrical, and the semiconductor cooler is placed in one in sky, by apply electric current to optical fiber carry out heating and Refrigeration, the wrapping post are encapsulated in the outer layer metal shell, are additionally provided between the outer layer metal shell and optical fiber heat-insulated Piece, the heat sink is arranged on semiconductor cooler outer end, and outside naked exposed on external layer metal-back, the thermistor is close to Heat sink.
- 2. a wide range of continuously adjustable optical fiber delay line device according to claim 1, it is characterised in that the heat sink For the metal material of dentation, for radiating to semiconductor cooler.
- 3. a wide range of continuously adjustable optical fiber delay line device according to claim 1, it is characterised in that the heat shield For high-temperature resistant thermal insulating material.
- 4. according to any a wide range of continuously adjustable optical fiber delay line devices of claim 1-3, it is characterised in that described Wrapping post be made of columned aluminum metal, surface is machined with the groove of releasable deformational stress.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711391081.2A CN107966765A (en) | 2017-12-21 | 2017-12-21 | A wide range of continuously adjustable optical fiber delay line device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711391081.2A CN107966765A (en) | 2017-12-21 | 2017-12-21 | A wide range of continuously adjustable optical fiber delay line device |
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| CN107966765A true CN107966765A (en) | 2018-04-27 |
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| CN201711391081.2A Pending CN107966765A (en) | 2017-12-21 | 2017-12-21 | A wide range of continuously adjustable optical fiber delay line device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820691A (en) * | 2021-08-17 | 2021-12-21 | 厦门彼格科技有限公司 | High-precision optical delay phase regulation and control method with optical amplification |
| CN114114718A (en) * | 2021-10-20 | 2022-03-01 | 中国电子科技集团公司第十三研究所 | Time delay control device of optical fiber |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6215941B1 (en) * | 1998-02-12 | 2001-04-10 | Oki Electric Industry Co., Ltd. | Optical delay time adjuster and optical time-division multiplexer |
| CN1905417A (en) * | 2006-08-02 | 2007-01-31 | 华中科技大学 | Optical fiber all-optical data converter |
| CN201464077U (en) * | 2009-07-24 | 2010-05-12 | 国网电力科学研究院武汉南瑞有限责任公司 | Constant temperature box for calibrating temperature of optical fiber |
| CN202948346U (en) * | 2012-12-07 | 2013-05-22 | 河北汉光重工有限责任公司 | Thermotank used for fiber-optic gyroscope |
| CN103901696A (en) * | 2012-12-26 | 2014-07-02 | 中国兵器装备研究院 | Nonlinear-effect restraining optical fiber containing plate |
| CN204422102U (en) * | 2015-02-10 | 2015-06-24 | 青岛派科森光电技术股份有限公司 | Fiber optic temperature Real-Time Monitoring and dynamic calibration apparatus |
-
2017
- 2017-12-21 CN CN201711391081.2A patent/CN107966765A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6215941B1 (en) * | 1998-02-12 | 2001-04-10 | Oki Electric Industry Co., Ltd. | Optical delay time adjuster and optical time-division multiplexer |
| CN1905417A (en) * | 2006-08-02 | 2007-01-31 | 华中科技大学 | Optical fiber all-optical data converter |
| CN201464077U (en) * | 2009-07-24 | 2010-05-12 | 国网电力科学研究院武汉南瑞有限责任公司 | Constant temperature box for calibrating temperature of optical fiber |
| CN202948346U (en) * | 2012-12-07 | 2013-05-22 | 河北汉光重工有限责任公司 | Thermotank used for fiber-optic gyroscope |
| CN103901696A (en) * | 2012-12-26 | 2014-07-02 | 中国兵器装备研究院 | Nonlinear-effect restraining optical fiber containing plate |
| CN204422102U (en) * | 2015-02-10 | 2015-06-24 | 青岛派科森光电技术股份有限公司 | Fiber optic temperature Real-Time Monitoring and dynamic calibration apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820691A (en) * | 2021-08-17 | 2021-12-21 | 厦门彼格科技有限公司 | High-precision optical delay phase regulation and control method with optical amplification |
| CN114114718A (en) * | 2021-10-20 | 2022-03-01 | 中国电子科技集团公司第十三研究所 | Time delay control device of optical fiber |
| CN114114718B (en) * | 2021-10-20 | 2024-01-30 | 中国电子科技集团公司第十三研究所 | Time delay control device for optical fiber |
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Application publication date: 20180427 |
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