CN102636838A - Package method and device for fiber bragg grating with adjustable central wavelength and adjustable temperature coefficient - Google Patents
Package method and device for fiber bragg grating with adjustable central wavelength and adjustable temperature coefficient Download PDFInfo
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Abstract
The invention discloses a package method and device for a fiber bragg grating with adjustable central wavelength and an adjustable temperature coefficient. Two ends of a sleeve pipe (the middle section of which is provided with a cavity) are respectively connected with two adapting rods with a low thermal expansion coefficient and a high thermal expansion coefficient through a thread or a sliding rod structure; each adapting rod partially protrudes into the cavity of the sleeve pipe; two tail fibers of the fiber bragg grating are respectively fixed on the adapting rods at the two ends; the two adapting rods as compensation elements change the positions of two fixed points at the tail of the fiber bragg grating along with the changes of the temperature, and further prestress applied to the fiber bragg grating is changed, and thus the temperature compensation is realized; and through regulating the adapting rods at two sides internally or externally at the same time, the central wavelength of the fiber bragg grating can be regulated, and the temperature coefficient of the fiber bragg grating is regulated through rotating or moving the sleeve pipe to regulate the lengths of the two adapting rods protruding into the cavity in the sleeve pipe.
Description
Technical field
the present invention relates to a kind of fiber grating and adjustable method for packing and the device of temperature coefficient, belong to optical fiber telecommunications system and technical field of optical fiber sensing.
Background technology
fiber grating as a kind of full fiber type passive device widespread usage in sensory field of optic fibre and optical fiber telecommunications system.It makes public through optical fiber is placed under the ultraviolet Light Interference Streaks, makes fiber core produce nonvolatil periodic index distribution vertically, thereby forms the reflection-type Passive Optical Components with wavelength selectivity.
are in actual application; Variation along with ambient temperature; Corresponding variation can take place in the effective refractive index of fiber grating and grating cycle; Because the centre wavelength of fiber grating is relevant with the grating cycle with its effective refractive index, thereby causes its centre wavelength also corresponding drift can take place, drift value is about 10pm/ ℃.This particularly is unacceptable in dense wavelength division multiplexing system in sensory field of optic fibre and optical communication system, has seriously limited the practical application of fiber grating.Therefore it is very necessary fiber grating being carried out the temperature compensation encapsulation, is very strict to the requirement of the temperature coefficient of fiber grating.
existing Chinese patent 02278787.9 discloses a kind of fiber grating temperature compensator, and the element that specifically adopts two kinds of thermal expansivity different materials to constitute links together through nested structure, comprises neck bush, lining and external bushing.Neck bush, external bushing is made up of the very little material of thermal expansivity, and lining is made up of the bigger material of thermal expansivity, and its neck bush is nested in the lining, and lining is in being nested in external bushing.Fiber grating its two ends after applying certain prestress along its axial direction are separately fixed on neck bush and the external bushing; When ambient temperature changes; The expansion or the different prestress that cause being applied on the fiber grating of amount of contraction of the lining that constitutes owing to different materials change, thereby compensation is because the variation of the caused fiber grating of temperature variation.This patent provides a kind of simple in structure, compact fiber grating encapsulation scheme; It exists shortcoming to have: after the encapsulation; Can't regulate packaging effect, often need repeatedly repeat to encapsulate the temperature coefficient requirement that just can reach required, fiber grating can't be regulated simultaneously.
existing Chinese patent 200920319233.2 discloses a kind of fiber grating passive temperature compensation encapsulating structure; It comprises neck bush, external bushing and base; Neck bush is nested in the base, and closely contacts with external bushing, and external bushing is nested between neck bush and the base; Leave the gap between external bushing and the base, the two ends of fiber grating are separately fixed at neck bush through epoxy glue and above the base.Bottom or sidepiece at base have threaded hole, and set screw is passed bottom or the sidepiece that threaded hole withstands on external bushing, make its displacement that vertical or side direction take place, thereby realize the adjusting of fiber grating.Its shortcoming has: can't realize encapsulating the adjusting of the temperature coefficient of grating, and when regulating fiber grating, because external bushing squints, not be in axial direction; Therefore when ambient temperature changes, its expansion or shrinkage component vertically will change, thereby cause the packaging effect of temperature compensation also can change.
existing Chinese patent 200710178617.2 discloses a kind of fiber grating temperature compensator of wavelength-tunable; Comprise temperature compensation mechanism and optical fiber effective length governor motion; Its optical fiber effective length governor motion is fixed in temperature compensation mechanism; This governor motion comprises the unsteady regulating block of being located between any fixed connection point and fiber grating; Optical fiber is walked around the regulating block contact area that floats and is constituted the tie point that floats, and can regulate the length of fiber that comprises fiber grating between the fixed connection point through the position of regulating the regulating block that floats, thereby the centre wavelength that realizes fiber grating is regulated.Its shortcoming has: fibre-optical bending is wrapped on the regulating block that floats, and this has limited unsteady regulating block must have bigger bending radius, fractures behind the fibre-optical bending preventing, causes this device size bigger.
Summary of the invention
the objective of the invention is to, and provide a kind of fiber grating and temperature coefficient simultaneously adjustable method for packing and device.It can carry out the temperature compensation encapsulation to fiber grating, and can regulate the temperature coefficient of the fiber grating after the encapsulation, and can regulate the centre wavelength of fiber grating within the specific limits, and simultaneously simple in structure, volume is little, and cost is low.
technical scheme of the present invention: the method for packing that a kind of fiber grating and temperature coefficient are adjustable; Be characterized in: have the sleeve pipe two ends of cavity to connect the adapting rod of two low thermal coefficient of expansion and high thermal expansion coefficient respectively through helicitic texture in a stage casing; The protruding cavity that advances sleeve pipe of adapting rod part; Two tail optical fibers of fiber grating are separately fixed on the adapting rod at two ends; Two adapting rods element by way of compensation change the position of two point of fixity of fiber grating afterbody with variation of temperature, and then have changed the prestress that is applied on the fiber grating, thereby realize temperature compensation; After encapsulation is accomplished, can realize adjusting through regulating the protruding length of advancing the inside pipe casing cavity of two adapting rods to the temperature coefficient of fiber grating.
In the method for packing that fiber grating that
are above-mentioned and temperature coefficient are adjustable; The protruding method of advancing the length of inside pipe casing cavity of two adapting rods of said adjusting does, after on the assembling base two adapting rods and sleeve pipe being fixed, unclamps set nut; Unclamp fixing again to sleeve pipe; The rotation or sliding sleeve, make sleeve pipe to the left or the right side move, fix with set nut respectively again after having regulated.
In the method for packing that
aforesaid fiber grating and temperature coefficient are adjustable; Said set nut is arranged on the outside of sleeve part of two adapting rods; Under the prerequisite that set nut has locked, continue to tighten or unscrew the fine setting that set nut is realized fiber grating.
In the method for packing that
aforesaid fiber grating and temperature coefficient are adjustable, the structure that two adapting rods and sleeve pipe are fixed is set on the said assembling base respectively.
In the method for packing that
aforesaid fiber grating and temperature coefficient are adjustable, said sleeve pipe adopts low thermal coefficient of expansion and the material preparation (like the invar material) of processing and manufacturing easily.
A kind of fiber grating and the adjustable packaging system of temperature coefficient of preceding method realized in
; Be characterized in: comprise sleeve pipe; The stage casing of sleeve pipe is provided with cavity; Two ends are equipped with screw or the through hole that runs through with cavity; Be respectively equipped with low high thermal expansion coefficient adapting rod (like aluminum alloy materials) and high low thermal coefficient of expansion adapting rod (like the invar material) in both sides screw or the through hole, all have the through hole that runs through on low thermal coefficient of expansion adapting rod and the high thermal expansion coefficient adapting rod; Fiber grating runs through low thermal coefficient of expansion adapting rod and high thermal expansion coefficient adapting rod through through hole, and gluing fixing through left side glue-applying point and right side glue-applying point.The right side glue-applying point will be on the low thermal coefficient of expansion material like this, because its thermal expansivity is very low, feasible requirement to this gluing precision reduces greatly, improves the fiber grating encapsulation precision.
In the packaging system that
aforesaid fiber grating and temperature coefficient are adjustable; Left side glue-applying point and right side glue-applying point are located at respectively on the side of interior low thermal coefficient of expansion adapting rod of sleeve pipe cavity and high thermal expansion coefficient adapting rod; And be provided with the groove of being convenient to gluing, gluing adopts 353ND epoxy glue.
In the packaging system that
aforesaid fiber grating and temperature coefficient are adjustable, be equipped with set nut on low thermal coefficient of expansion adapting rod outside the said sleeve pipe two ends and the high thermal expansion coefficient adapting rod.
In the packaging system that
aforesaid fiber grating and temperature coefficient are adjustable; Also comprise the assembling base; The assembling base is provided with to be respectively applied for and fixes sleeve pipe and the low thermal coefficient of expansion adapting rod at two ends and the draw-in groove of high thermal expansion coefficient adapting rod, and draw-in groove is provided with fixed screw.
In the packaging system that
aforesaid fiber grating and temperature coefficient are adjustable, said sleeve pipe is provided with the sleeve pipe scale.
compared with prior art; The present invention can regulate the tc compensation effect of fiber grating of encapsulation; Can avoid because the packaging effect of the temperature compensation that the error of Theoretical Calculation and actual fabrication or manual operation deviation etc. cause reaching required; Perhaps to have requirement need change the effect temperature compensation etc. of original packaging system former thereby carry out the repeatability encapsulation because of other; Practice thrift Production Time and cost, can repeatedly regulate, reach necessary requirement up to packaged fiber grating temperature coefficient to encapsulation; Through regulating, can make the temperature coefficient of packaged fiber grating in 0 degree centigrade to 60 degrees centigrade scope of temperature, be decreased to 0.15pm/ ℃.And can among a small circle, (positive and negative approximately 1nm) regulate the centre wavelength of fiber grating, the while compact conformation, it is little to take up room.
Description of drawings
Figure 1A is a screw fiber grating encapsulating structure synoptic diagram of the present invention;
Figure 1B is a slide bar type fiber grating encapsulating structure synoptic diagram of the present invention;
Fig. 2 is installed in the synoptic diagram in the assembling base for encapsulating structure;
Fig. 3 is the sectional view of the scalable optical fiber grating temperature compensation packaging system before regulating;
Fig. 4 is the sectional view of the scalable optical fiber grating temperature compensation packaging system after regulating;
Fig. 5 is the structural representation of special-purpose assembling base;
The centre wavelength of Fig. 6 fiber grating when not using apparatus of the present invention and method is with the variation of temperature curve map;
Fig. 7 for the centre wavelength of using fiber grating after apparatus of the present invention and the method with the variation of temperature curve map.
Being labeled as in
accompanying drawing: 1-set nut; The 2-sleeve pipe; 3-left side glue-applying point; 4-right side glue-applying point; The 5-fixed screw; The 6-fiber grating; 7-low thermal coefficient of expansion adapting rod; 8-assembles base; 9-high thermal expansion coefficient adapting rod; 10-sleeve pipe scale.
Embodiment
are further described the present invention below in conjunction with accompanying drawing and embodiment, but not as the foundation to the present invention's restriction.
embodiment.The method for packing that a kind of fiber grating and temperature coefficient are adjustable; There are the sleeve pipe two ends of cavity to connect the adapting rod of two low thermal coefficient of expansion and high thermal expansion coefficient respectively through helicitic texture in a stage casing; The protruding cavity that advances sleeve pipe of adapting rod part; Two tail optical fibers of fiber grating are separately fixed on the adapting rod at two ends, and two adapting rods element by way of compensation change the position of two point of fixity of fiber grating afterbody with variation of temperature, and then have changed the prestress that is applied on the fiber grating; Thereby the realization temperature compensation, and can regulate the temperature coefficient of fiber grating through regulating the protruding length of advancing the inside pipe casing cavity of two adapting rods.The protruding method of advancing the length of inside pipe casing cavity of two adapting rods of said adjusting does; After on the assembling base two adapting rods and sleeve pipe being fixed; Unclamp set nut, unclamp fixing to sleeve pipe, revoling tube again; Make sleeve pipe to the left or the right side move, fix with set nut respectively again after having regulated.Said set nut is arranged on the outside of sleeve part of two adapting rods, under the prerequisite that set nut has locked, continues to tighten or unscrew the fine setting that set nut is realized fiber grating.Said sleeve pipe adopts the low thermal coefficient of expansion material preparation.
A kind of fiber grating and the adjustable packaging system of temperature coefficient of said method realized in
; Like Figure 1A and shown in Figure 2, comprise sleeve pipe 2, the stage casing of sleeve pipe 2 is provided with cavity; Two ends are equipped with the screw that runs through with cavity; Be respectively equipped with low thermal coefficient of expansion adapting rod 7 and high thermal expansion coefficient adapting rod 9 in the screw of both sides, low thermal coefficient of expansion adapting rod 7 is a part outside sleeve pipe 2 with high thermal expansion coefficient adapting rod 9, and a part is in the cavity of sleeve pipe 2; Fiber grating 6 runs through low thermal coefficient of expansion adapting rod 7 and high thermal expansion coefficient adapting rod 9, and gluing fixing with right side glue-applying point 4 through left side glue-applying point 3.Left side glue-applying point 3 is located at respectively on the side of sleeve pipe 2 cavitys interior low thermal coefficient of expansion adapting rod 7 and high thermal expansion coefficient adapting rod 9 with right side glue-applying point 4, and is provided with the groove of being convenient to gluing.Be equipped with set nut 1 on low thermal coefficient of expansion adapting rod 7 outside said sleeve pipe 2 two ends and the high thermal expansion coefficient adapting rod 9.Also comprise assembling base 8, as shown in Figure 5, assembling base 8 is provided with and is respectively applied for the low thermal coefficient of expansion adapting rod 7 that fixes sleeve pipe 2 and two ends thereof and the draw-in groove of high thermal expansion coefficient adapting rod 9, and draw-in groove is provided with fixed screw 5.Said sleeve pipe 2 is provided with sleeve pipe scale 10.The screw that wherein runs through with cavity also can be set to through hole, and low thermal coefficient of expansion adapting rod 7 is connected with sleeve pipe 2 with the slide bar mode with high thermal expansion coefficient adapting rod 9, shown in Figure 1B.
aforesaid a kind of fiber grating and the adjustable packaging system of temperature coefficient; Can accurately control the length of high thermal expansion coefficient adapting rod 9 in sleeve pipe 2 through the scale on the sleeve pipe 2; When regulating the temperature coefficient of packaged fiber grating, can accurately read the regulating and controlling amount simultaneously through sleeve pipe 2 high scales.
Principle of work: centre wavelength is an important parameter of fiber grating, and its effective refractive index with fiber grating is relevant with the grating cycle, and its physical relationship formula is following:
Formula (1)
In the formula
Be the centre wavelength of fiber grating,
Be the effective refractive index of fiber grating,
Be the fiber grating cycle.
When ambient temperature changed, because the thermo-optic effect of optical fiber and the effective refractive index and the grating cycle of thermal expansion effects fiber grating all corresponding variation can take place, its physical relationship formula was following:
In the formula
Be the variation of the fiber grating that causes by temperature variation,
Be the thermo-optical coeffecient of optical fiber,
Be the thermal expansivity of optical fiber,
Be the ambient temperature changing value.
The external world apply prestress on fiber grating after, when this prestressed size changed, because the elasto-optical effect of optical fiber, corresponding variation also can take place in the centre wavelength of fiber grating, its physical relationship formula is following:
In the formula
Be the variation of the fiber grating that causes by STRESS VARIATION,
Be the elasto-optical coefficient of optical fiber,
The strain that causes for the external world.
Can find out that by above-mentioned the variation of the centre wavelength of fiber grating and ambient temperature and stress is all linear, so make the center wavelength variation that fiber grating is total when the extraneous stress that be applied on the fiber grating
Satisfy following relational expression, just can realize the temperature compensation of fiber grating:
the invention provides a kind of scalable optical fiber grating temperature compensation packaging system shown in Figure 1A, comprise specialized barrel 2, high thermal expansion coefficient adapting rod 9, low thermal coefficient of expansion adapting rod 7 etc.
said high thermal expansion coefficient adapting rod 9; Low thermal coefficient of expansion adapting rod 7 is coupled through helicitic texture from the two ends of sleeve pipe 2 respectively; And be locked respectively through 2 set nuts 1; When regulating then, said structure is fixed on the assembling base 8 through fixed screw 5 regulates again.Described fiber grating 6 is after applying certain prestress, and the tail optical fiber through its two ends adopts 353ND epoxy glue water to be adhesively fixed on high thermal expansion coefficient adapting rod 9 respectively, in the groove on the low thermal coefficient of expansion adapting rod 7.Groove on two adapting rods and the sleeve pipe 2 all carries out gluing downwards for ease directly over device.
described adapting rod 9 adopts material different to constitute with adapting rod 7; When regulating the optical fiber grating temperature compensation effect, the adjusting of effect temperature compensation is carried out in the displacement that utilizes two kinds of material coefficient of thermal expansion coefficient difference and sleeve pipe when moving, to produce.
described adapting rod 7 adopts the low thermal coefficient of expansion material to constitute; The glue-applying point of such end will be on the low thermal coefficient of expansion material; Because its thermal expansivity is very low, feasible requirement to this gluing precision reduces greatly, improves the precision of fiber grating encapsulation.
described sleeve pipe 2 can adopt the very little invar material of thermal expansivity to process.
High thermal expansion coefficient adapting rod 9 all links to each other with sleeve pipe 2 through helicitic texture with low thermal coefficient of expansion adapting rod 7, and the protruding inside of advancing sleeve pipe 2 of some length respectively, and is as shown in Figure 3, the distance of the starting point of this part to glue-applying point
With
Be respectively effective compensating length of high thermal expansion coefficient adapting rod 9 and low thermal coefficient of expansion adapting rod 7.Distance between two glue-applying points does
, the length of rectangular recess does on the sleeve pipe 2
In the formula
Be the thermal expansivity of high thermal expansion coefficient adapting rod,
Be the thermal expansivity of low thermal coefficient of expansion adapting rod,
Be the thermal expansivity of sleeve pipe,
Changing value for ambient temperature.
Because
The variation of length, thus the prestress that causes being applied on the fiber grating changes; Because fiber grating itself is also elongated because of the meeting expanded by heating, finally cause taking place on the fiber grating strain simultaneously
Draw by following formula:
In the formula
Thermal expansivity for fiber grating.
Above-mentioned formula of simultaneous (4) and formula (6) can get:
Therefore after selecting suitable material, when the design length size
,
,
With
Satisfy the temperature compensation encapsulation that fiber grating just can be realized in formula (7) back.
Calculate and after encapsulation finishes in above-mentioned theory
; Usually can cause to reach the packaging effect of temperature compensation because of the error of Theoretical Calculation and actual fabrication or manual operation deviation etc.; Perhaps there is requirement need change the effect temperature compensation of original packaging system in addition; The prior art scheme expends Production Time and cost occurring having only selection to encapsulate again under the above-mentioned situation.The packaging system that fiber grating provided by the present invention and temperature coefficient are adjustable can be regulated the temperature coefficient of the fiber grating after the encapsulation.
are fixed two adapting rods and sleeve pipe 2 on assembling base 8 when the temperature coefficient of fiber grating is regulated, and unclamp after the set nut 1; Unclamp fixing to sleeve pipe 2 again, revoling tube 2, make sleeve pipe 2 to the left or the right side move; Fix with set nut 1 respectively again after having regulated; And move to make things convenient for sleeve pipe 2 rotations at the interval of leaving any between set nut 1 and the sleeve pipe 2, again according to required adjusting requirement, comes revoling tube 2 to move; When needs increased the effect temperature compensation of fiber grating, then revoling tube 2 moved to low-expansion coefficient adapting rod 7 directions; Otherwise then reverse rotation sleeve pipe 2 moves to high expansion coefficient adapting rod 9 directions.Come the accurately amount of movement of control sleeve pipe 2 according to the size of required regulated quantity through the scale on the contrast sleeve pipe, again the set nut at two ends is locked after having regulated, just can realize the adjusting of the temperature compensation packaging effect of fiber grating.When needs are regulated once more, repeat above step and get final product.
The principle that
packaging effect of fiber grating temperature compensator of the present invention is regulated is following: moving to high thermal expansion coefficient adapting rod 9 directions with revoling tube 2 is example: the set nut 1 that unscrews both sides; Revoling tube 2 moves to high thermal expansion coefficient adapting rod 9 directions, and is again that the set nut 1 at two ends is locked.As shown in Figure 4, in the process of regulating 
With 
Length constant, 
Length increase to 
, Contraction in length do 
, by being prone to see among the figure 
, 
, , 
Axial internal clearance with sleeve pipe 2 Satisfy following relational expression:
Simultaneous formula (6), (8), (9) can get:
In the formula
Preceding for regulating along with ambient temperature changes
The dependent variable of fiber grating,
For regulating the back along with ambient temperature changes
The dependent variable of fiber grating.
Because the thermal expansivity of two adapting rods is different,
Less than
So following formula (10) is a negative value, carrying it into formula (6) can know,
Value can diminish; So temperature variant regulated quantity of fiber grating
And displacement
Relational expression:
Therefore control according to the temperature variant variable quantity of the fiber grating of required adjusting
Stool and urine can realize the adjusting of optical fiber grating temperature compensation effect.Otherwise, when revoling tube 2 when low-expansion coefficient adapting rod 7 directions move,
Value can become greatly same control
Stool and urine can realize that the effect temperature compensation of fiber grating regulates round about.
are when regulating the temperature coefficient of packaged fiber grating; Before unscrewing set nut; Said sleeve pipe 2, high thermal expansion coefficient adapting rod 9 and low thermal coefficient of expansion adapting rod 7 are fixed in the groove on the assembling base through fixed screw respectively, to prevent that two adapting rods rotate or squint and cause fiber grating to twist off or optical fiber grating temperature packaging effect variation in the process of regulating.After unscrewing set nut, unclamp the screw of fixed sleeving 2 again, the adjusting that sleeve pipe is realized packaged fiber grating temperature coefficient is moved in rotation.
said scalable optical fiber grating temperature compensation packaging system continues to tighten or unscrew the fine setting that set nut can be realized fiber grating under the prerequisite that the set nut at two ends has been locked.We once realized the range of adjustment of ± 1 nanometer in experimentation.
The centre wavelength that
Fig. 6 and Fig. 7 are respectively fiber grating when not using apparatus of the present invention and method with variation of temperature curve map and the centre wavelength of using fiber grating after apparatus of the present invention and the method with the variation of temperature curve map.The centre wavelength of fiber grating is 0 degree centigrade to 60 degrees centigrade temperature range after using contrive equipment and method; We have realized that in experiment the centre wavelength drift value of fiber grating is 0.009nm; Its temperature coefficient is reduced to 0.15pm/ ℃; Be about 1/60 of the preceding fiber grating of using compensation, the effect temperature compensation of fiber grating is remarkable.
accompanying drawing is mainly used in principle of work signal, rather than is used in reference to the form and the details of fixed structure, can also can Outer cylindrical for the polygon in illustrating like adapting rod two ends and sleeve pipe profile.
The above is embodiment of the present invention for
, and any technician who is familiar with the present technique field is in the technical scope that the present invention discloses, and the variation that can expect easily and replacement all should be encompassed within protection scope of the present invention.
Claims (10)
1. fiber grating and the adjustable method for packing of temperature coefficient; It is characterized in that: have the sleeve pipe two ends of cavity to connect the adapting rod of two low thermal coefficient of expansion and high thermal expansion coefficient respectively through screw thread or Slide bar structure in a stage casing; The protruding cavity that advances sleeve pipe of part adapting rod; Fiber grating two side optical fibers are separately fixed on the adapting rod at two ends; Two adapting rods element by way of compensation change the relative position of fiber grating both sides point of fixity with variation of temperature, and then have changed the prestress that is applied on the fiber grating, thereby realize temperature compensation; Through with the both sides adapting rod simultaneously outwards or inwardly adjusting can realize the centre wavelength of fiber grating is regulated, and through the protruding adjusting of advancing the relative length realization of inside pipe casing cavity of two adapting rods of relative position scalable of rotation or sliding sleeve and adapting rod to the temperature coefficient of fiber grating.
2. fiber grating according to claim 1 and the adjustable method for packing of temperature coefficient; It is characterized in that: the protruding method of advancing the length of inside pipe casing cavity of two adapting rods of said adjusting does; After on the assembling base two adapting rods being fixed; The rotation or sliding sleeve, make sleeve pipe to the left or the right side move, fix with set nut respectively after having regulated.
3. fiber grating according to claim 2 and the adjustable method for packing of temperature coefficient; It is characterized in that: said set nut is arranged on the outside of sleeve part of two adapting rods; Under the incomplete locking state of set nut; Can the both sides adapting rod outwards or inwardly be regulated simultaneously, realize the fine setting of fiber grating.
4. fiber grating according to claim 2 and the adjustable method for packing of temperature coefficient is characterized in that: the structure that two adapting rods and sleeve pipe are fixed is set on the said assembling base respectively.
5. fiber grating according to claim 1 and the adjustable method for packing of temperature coefficient is characterized in that: said sleeve pipe adopts the low thermal coefficient of expansion material preparation.
6. realize a kind of fiber grating and the adjustable packaging system of temperature coefficient of the said method of the arbitrary claim of claim 1 to 5; It is characterized in that: comprise sleeve pipe (2); The stage casing of sleeve pipe (2) is provided with cavity; Two ends are equipped with screw or the through hole that runs through with cavity, and low thermal coefficient of expansion adapting rod (7) and high thermal expansion coefficient adapting rod (9) are threaded with sleeve pipe (2) from both sides through screw or through hole respectively; On low thermal coefficient of expansion adapting rod (7) and the high thermal expansion coefficient adapting rod (9) through hole that runs through is arranged all; Fiber grating (6) runs through low thermal coefficient of expansion adapting rod (7) and high thermal expansion coefficient adapting rod (9) through through hole, and gluing fixing through left side glue-applying point (3) and right side glue-applying point (4).
7. fiber grating according to claim 6 and the adjustable packaging system of temperature coefficient; It is characterized in that: left side glue-applying point (3) and right side glue-applying point (4) are located at respectively on the side of interior low thermal coefficient of expansion adapting rod (7) of sleeve pipe (2) cavity and high thermal expansion coefficient adapting rod (9), and are provided with the groove of being convenient to gluing.
8. fiber grating according to claim 6 and the adjustable packaging system of temperature coefficient is characterized in that: be equipped with set nut (1) on low thermal coefficient of expansion adapting rod (7) outside said sleeve pipe (2) two ends and the high thermal expansion coefficient adapting rod (9).
9. fiber grating according to claim 6 and the adjustable packaging system of temperature coefficient; It is characterized in that: also comprise assembling base (8); Assembling base (8) is provided with to be respectively applied for and fixes sleeve pipe (2) and the low thermal coefficient of expansion adapting rod (7) at two ends and the draw-in groove of high thermal expansion coefficient adapting rod (9), and draw-in groove is provided with fixed screw (5).
10. fiber grating according to claim 6 and the adjustable packaging system of temperature coefficient is characterized in that: said sleeve pipe (2) is provided with sleeve pipe scale (10).
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| CN 201210152919 CN102636838B (en) | 2012-05-16 | 2012-05-16 | Package method and device for fiber bragg grating with adjustable central wavelength and adjustable temperature coefficient |
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| CN 201210152919 CN102636838B (en) | 2012-05-16 | 2012-05-16 | Package method and device for fiber bragg grating with adjustable central wavelength and adjustable temperature coefficient |
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| CN105651319A (en) * | 2016-01-05 | 2016-06-08 | 武汉理工大学 | Packaging device for applying constant pre-stress on fiber grating sensor |
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| CN109099946A (en) * | 2018-06-21 | 2018-12-28 | 武汉理工大学 | A kind of fiber-optic grating sensor packaging system and method |
| CN110456498A (en) * | 2019-08-06 | 2019-11-15 | 南京英田光学工程股份有限公司 | Based on the adjustable main beam-expanding system for carrying out Control Thermal Deformation with reversed thermal compensation |
| CN112162364A (en) * | 2020-09-25 | 2021-01-01 | 中南大学 | Phase-shift fiber Bragg grating capable of switching wavelength and wavelength switching method |
| CN112945119A (en) * | 2021-02-05 | 2021-06-11 | 衢州学院 | Fiber grating strain sensor for composite material and packaging method thereof |
| CN114265143A (en) * | 2022-01-10 | 2022-04-01 | 安徽理工大学 | Packaging structure of fiber grating |
| CN114993282A (en) * | 2022-08-01 | 2022-09-02 | 中国船舶重工集团公司第七0七研究所 | Loop tail fiber compensation method of fiber-optic gyroscope and fiber length compensator |
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