CN1388388A - Fiber grating temperature compensator and its making process - Google Patents
Fiber grating temperature compensator and its making process Download PDFInfo
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- CN1388388A CN1388388A CN 01118519 CN01118519A CN1388388A CN 1388388 A CN1388388 A CN 1388388A CN 01118519 CN01118519 CN 01118519 CN 01118519 A CN01118519 A CN 01118519A CN 1388388 A CN1388388 A CN 1388388A
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Abstract
The fiber grating temperature compensator has at least one metal part fixed on one base and fiber grating is fixed onto the base and/or the metal part at high temperature state or pre-stress applying state. The making process of the compensator is also provided. The compensator has simple structure and simple making process. During the making process, fiber grating may be fixed with high-temperature cured AB glue without applying pre-load, the maintaining the compensator at high temperature for another set period can anneal the fiber grating and simple the making process.
Description
The present invention relates to optical communication passive device packaging system and manufacture method thereof, particularly relate to multiple fiber grating temperature compensator and manufacture method thereof.
Fiber grating (Fiber Bragg Grating, FBG) be widely used in making in the various elements at high density divided duplexing equipment networking (DWDM), these elements for example can be FBG and stablize laser light source and be used for multiplexer, de-multiplexer and increase/subtract the various DWDM devices of wave filter.Yet when practical application, environment temperature rises and will exert an influence to fiber grating.Because width and refractive index are determined catoptrical centre frequency between the grid of fiber grating, therefore, all must be very accurate in design and manufacturing.When ambient temperature rose, optical fibre refractivity changed thereupon, made grating wavelength become big and the centre wavelength value of off-design, thereby need avoid the generation of this situation.
Fig. 9 has shown a kind of fiber grating temperature compensator of traditional employing bimetal structure, it is made up of two arms 13,13 ' and two sheet metal 14,15, wherein, two sheet metals 14,15 weld together, two arms 13,13 ' then are welded on the opposite side of sheet metal 14,15, and wherein the thermal expansivity of a sheet metal is less than the thermal expansivity of another sheet metal.
Though this temperature compensation means can alleviate the influence that temperature variation produces grating, yet, because the tolerance that manufacturing and encapsulation process produce makes this compensation numerical value can't reach predetermined degree of accuracy.
Figure 10 has shown the fiber grating temperature compensator 20 of another kind of traditional employing bimetal structure, and it comprises that two external forms slightly are the thermometal piece 21,22 of complementary shape, and wherein the thermal expansivity of a derby is less than the thermal expansivity of another derby.One fiber grating 17 is fixed between these two derbies 21,22.These two derbies 21,22 are fixed together by the nut 30 of executing preload, to alleviate the influence that temperature variation produces grating 17.
Though this temperature compensation means can alleviate the influence that temperature variation produces grating, yet, because its complex structure, and need to increase by one in addition and bestow the manufacturing step of preload, thereby have the difficulty of manufacturing and cost than problems such as height.
The objective of the invention is to provide in order to address the above problem multiple temperature compensation means and the manufacture method thereof that is used to proofread and correct fiber grating, these temperature compensation means all comprise one when optical fiber experience temperature rises the compression set of compressible fiber grating.
In one embodiment, this compression set comprises at least one derby or sheet metal, it is fixed or is suspended in the substrate, and fiber grating is being fixed on substrate and/or the metal under the condition of high temperature, or optical fiber is fixed on substrate and/or the metal imposing under the state of pretension.
The present invention also provides the method for making said apparatus.
Prepared multiple fiber grating temperature compensator has advantage of simple structure according to the present invention.Wherein, a kind of device can solve heat dissipation problem separately, so that the thermal expansion time of immediate reaction fiber grating; Quick positioning design and making that another kind of device can improve fiber grating.One of these devices can directly be fixed on fiber grating on the temperature compensation base material, handle and need not do any early stage.On manufacture method, can use the AB high temperature setting glue at high temperature fiber grating to be fixed on this device, therefore save necessity of bestowing preload.This device also can be placed a preset time under the condition of high temperature after the fixing program of hot setting, with to fiber grating annealing, thereby further simplify manufacture process.
For make above-mentioned purpose of the present invention, feature, and advantage clearer, the present invention is described in further detail below in conjunction with accompanying drawing and by preferred embodiment.Wherein:
Fig. 1 has shown the vertical view according to the prepared fiber grating temperature compensator of the first embodiment of the present invention;
Figure 1A is the schematic plan of first embodiment as shown in Figure 1, demonstrates it and also comprises a manual adjusting gear;
Fig. 2 has shown the vertical view of prepared fiber grating temperature compensator according to a second embodiment of the present invention;
Fig. 2 A is the schematic plan of the 3rd embodiment as shown in Figure 2, demonstrates it and also comprises a manual adjusting gear;
Fig. 3 has shown the vertical view of the prepared fiber grating temperature compensator of a third embodiment in accordance with the invention;
Fig. 3 A is the schematic plan of the 3rd embodiment as shown in Figure 3, demonstrates it and also comprises a manual adjusting gear;
Fig. 4 A has shown the process flow diagram of method of the fiber grating temperature compensator of shop drawings 1;
Fig. 4 B has shown another process flow diagram of method of the fiber grating temperature compensator of shop drawings 1;
Fig. 4 C has shown the process flow diagram of method of the fiber grating temperature compensator of shop drawings 2;
Fig. 4 D has shown another process flow diagram of method of the fiber grating temperature compensator of shop drawings 2;
The process flow diagram of the method for the fiber grating temperature compensator of Fig. 4 E demonstration shop drawings 3;
Fig. 5 has shown the compensating test comparison diagram of the first embodiment of the present invention;
Fig. 6 has shown the vertical view of the prepared fiber grating temperature compensator of a fourth embodiment in accordance with the invention;
Fig. 6 A is the schematic plan of the 4th embodiment as shown in Figure 6, demonstrates it and also comprises a manual adjusting gear;
Fig. 7 has shown the vertical view of prepared fiber grating temperature compensator according to a fifth embodiment of the invention;
Fig. 7 A is the schematic plan of the 5th embodiment as shown in Figure 7, demonstrates it and also comprises a manual adjusting gear;
Fig. 8 A has shown the process flow diagram of method of the fiber grating temperature compensator of shop drawings 6;
Fig. 8 B has shown another process flow diagram of method of the fiber grating temperature compensator of shop drawings 6;
Fig. 8 C has shown the process flow diagram of method of the fiber grating temperature compensator of shop drawings 7;
Fig. 8 D has shown another process flow diagram of method of the fiber grating temperature compensator of shop drawings 7;
Fig. 9 has shown the fiber grating temperature compensator of a traditional employing bimetal structure; And
Figure 10 shows the fiber grating temperature compensator of the employing bimetal structure that another is traditional.
First embodiment
Fig. 1 has shown a fiber grating temperature compensator 10 according to the first embodiment of the present invention, and it comprises: a substrate 12, an optical fiber compression set and an optical fiber 16.Among this embodiment, the optical fiber compression set comprises a derby 14 that is fixed in the substrate 12, and optical fiber 16 vertically is fixed on substrate 12 and the derby 14 along it, and wherein the stage casing of optical fiber 16 is provided with read-write grating 18.
As shown in Figure 1, form one first groove 122 in the substrate 12; First length L 1 of this first groove 122 is greater than second length L 2 of derby 14, so that derby 14 is reserved a space 124 when being fixed in first groove 122 in substrate 12.
Quartz material is preferably adopted in substrate 12, and derby 14 is preferably made by aluminium or stainless steel.In this embodiment, one end of optical fiber 16 is fixed to first point of fixity, 162 places in the substrate 121, its other end is fixed to second point of fixity, 163 places on the derby 14, makes the grating 18 of optical fiber 16 and derby 14 overlapping, and between two point of fixity 162 and 163 of optical fiber 16.
Fiber grating 18 preferably is fixed on substrate and/or the metal with Instant cement imposing under the state of pretension; Or with optical fiber 16 after affixing to substrate 12 and derby 14 with viscose glue such as the AB high temperature setting glue, under the state of high temperature (as 100 ℃), be cured to substrate 12 and derby 141, to increase the interior pulling force of fiber grating 18.Also can be after curing to be finished, continuation is positioned over high temperature with this device and assigns a schedule time, simultaneously fiber grating 18 being carried out cycle of annealing, thereby further simplifies manufacture process.
When being subjected to temperature effect and influencing, rise to example with environment temperature, whole device 10 will expand.Because the thermal expansivity of quartz substrate 12 much smaller than the thermal expansivity of derby 14, therefore can be ignored the bulking effect of quartz substrate 12.
As a complete unit, 124 direction expands towards the space to have only derby 14, the fiber grating 18 of extruding between two point of fixity 162 and 163, thereby fiber grating 18 is produced axle pressure, the grating wavelength that makes fiber grating 18 influenced by the temperature rising and increase is oppositely withdrawn, and can avoid the centre wavelength of fiber grating 18 to produce skew thus.The design of its paste position can be with reference to following formula:
Suppose that fiber grating 18 is not adhered on the derby 14 and temperature influence only, then this moment, fiber grating was subjected to the influence in temperature field to be:
(under the free state)
Wherein,
λ
B: fiber grating centre wavelength
Δ λ
B: fiber grating center wavelength shift amount
ξ: the heat of optical fiber 16-luminous effect coefficient
Δ T: temperature variation
Make its effect with temperature compensation on the derby 14 as if fiber grating 18 is cemented in, promptly can obtain the variation of a negative strain, be equivalent to apply a pressure on fiber grating 18, thereby produce strain variation, its formula is as follows:
(under the axial strain state)
ε
x: the axial strain of granting fiber grating
(1-Pe): strain-luminous effect coefficient
In order to reach the compensation effect of expection, must make:
Fig. 4 A and Fig. 4 B have shown three kinds of process flow diagrams of method of the fiber grating temperature compensator of shop drawings 1.Wherein, the device described in Fig. 4 A and the 4B (as shown in Figure 1) is by according to above-mentioned formula at first selected point of fixity 163 and then mode that the other end of optical fiber 16 is fixed on the point of fixity 162 in the substrate 12 obtained on derby 14.
When first embodiment was carried out practical application, the compensation result of gained as shown in Figure 5.The wavelength variations of the data that Fig. 5 is denoted as " compensation " when not using compensation system of the present invention; The data that are denoted as " compensation " are the variation of having used fiber optic wavelength behind the compensation system of the present invention.As shown in Figure 5, compare with uncompensated fiber grating, the degree that has adopted the wavelength variations of the fiber grating of compensation system of the present invention to be subjected to influence of temperature change obviously reduces.
With reference to Figure 1A, as shown in Figure 1 fiber grating temperature compensator 10 can comprise a manual adjusting gear 20 in addition among the present invention, and it vertically is arranged in the substrate 12 coaxially along substrate 12.In the embodiment shown in Figure 1A, the other end of substrate 12 is formed with one second groove 22, and is provided with two arms 221 and 222 along the longitudinal separation of substrate 12.One screw rod 24 with dextrorotation screw thread 26 and derotation screw thread 28 can be located on second groove 22 along vertically striding of substrate 12, and wherein this dextrorotation screw thread 26 and derotation screw thread 28 are incorporated into respectively on arm 221 and 222.
Mode according to this, when at the manual rotary screw 24 of direction, then this screw rod 24 promptly order about arm 222 gradually displacement with near arm 221.And when manually rotating this screw rod 24 with other direction, then this screw rod 24 order about arm 222 gradually displacement with away from arm 221.Because an end of optical fiber 16 fixedly is bonded on the arm 222 at first point of fixity, 162 places of substrate 12, so the manual adjustment slightly of the distance between first point of fixity 162 and second point of fixity 163; Therefore, the tension force of the fiber grating between point of fixity 162 and 163 18 and length can be passed through rotating screw bolt 24 and manual adjustment.
Second embodiment
Fig. 2 has shown second embodiment according to fiber grating temperature compensator of the present invention.This compensation system 10 ' comprising: a substrate 12 ' and an optical fiber compression set.In this embodiment, this optical fiber compression set comprises one first derby 14 ' and one second derby 142 ', they are fixed in the substrate 12 ' respectively, an and optical fiber 16 ', it longitudinally is fixed on two derbies 14 ', 142 ', wherein is positioned at two derbies 14 ', 142 " between the stage casing of optical fiber 16 be provided with grating 18 '.
As shown in Figure 2, substrate 12 ' is gone up and is formed a groove 122 '; First length L 1 of groove 122 ' is greater than two derbies 14 ', 142 second length L 2 and the 3rd length L 3 sums, so that two derbies 14 ', 142 ' are when being fixed on opposite end in the groove 122 ', between two derbies 14 ', 142 ' substrate 12 ', leave a space 124 ', and the total length L G of grating 18 ' is slightly less than the poor of first length L 1 and second length L 2, the 3rd length L 3 summations.
Quartz material is preferably adopted in substrate 12 ', and derby 14 ', 142 ' is then preferably made by aluminium or stainless steel.In this embodiment, one end of optical fiber 16 ' is fixed on first point of fixity 163 ' on first derby 14 ', the other end then is fixed on second point of fixity 162 ' on second derby 142 ', so that the grating 18 ' of optical fiber 16 ' is exposed in the space 124 '.
Fiber grating 18 ' preferably is fixed on the metal with Instant cement imposing under the state of pretension; Or optical fiber 16 ' affixed to the viscose glue such as the AB high temperature setting glue after two derbies 14 ', 142 ' go up, be cured under the state of high temperature (as 100 ℃) on two derbies 14 ', 142 ', to increase the interior pulling force of fiber grating 18 '.Also can be after curing to be finished, continuation places high temperature to assign a schedule time in this device, simultaneously fiber grating 18 ' being annealed, thereby further simplifies manufacture process.
When being subjected to temperature effect and influencing, rise to example with environment temperature, whole device 10 ' will expand.Because the thermal expansivity of quartz substrate 12 ' much smaller than derby 14 ', 142 ' thermal expansivity, therefore can be ignored the bulking effect of quartz substrate 12 '.
As a complete unit, have only two derbies 14 ', 142 ' direction to expand towards space 124 ', cause pressure to fiber grating 18 ', the grating wavelength that makes fiber grating 18 ' influenced by the temperature rising and increase is oppositely withdrawn, make the unlikely variation of grating wavelength, can avoid the centre wavelength of fiber grating 18 ' to produce skew thus.The point of fixity 162 ' of device 10 ' and 163 ' can be with reference to being determined as the described formula of first embodiment.
Fig. 4 C and 4D have shown two process flow diagrams of method of the fiber grating temperature compensator of shop drawings 2; Shown in Fig. 4 C and 4D, be fixed to before point of fixity 162 ' on second derby 142 ' goes up at the other end optical fiber 16 ', can be according to the at first selected point of fixity 163 ' of optical fiber 16 ' on derby 14 ' of aforementioned formula.
With reference to figure 2A, the fiber grating temperature compensator 10 ' of the present invention second embodiment as shown in Figure 2 can comprise a manual adjusting gear 20 ' in addition, and it vertically is located in the substrate 12 ' coaxially along substrate 12 '.Distance between the similar embodiment shown in Figure 1A as described above, two arms 221 ' and 222 ' can be adjusted by rotating screw bolt 24 ', thereby the manual adjustment slightly of the distance between first, second point of fixity 163 ' and 162 '.Thereby therefore the tension force and the length that are positioned at two fiber gratings 18 ' between the point of fixity 163 ' and 162 ' can pass through rotating screw bolt 24 ' and manual adjustment.
The 3rd embodiment
Fig. 3 has shown one according to fiber grating temperature compensator 10 of the present invention " the 3rd embodiment.This compensation system 10 wherein " comprising: a substrate 12 ", an optical fiber compression set and an optical fiber 16 ".In this embodiment, the optical fiber compression set comprises one first derby 14 " and a compensation block 19 ", they are fixed to substrate 12 respectively " on; And this optical fiber 16 " fixedly be bonded in compensation block 19 along its fore-and-aft plane " on, wherein optical fiber 16 " the stage casing be provided with grating 18 ".
As shown in Figure 3, substrate 12 " the last groove 122 that forms "; Groove 122 " first length L 1 greater than derby 14 " second length L 2, so that derby 14 " be fixed to this substrate 12 " groove 122 " an end time; in substrate 12 " and derby 14 " between form a space (not label); to hold compensation block 19 ", and grating 18 " total length L G be slightly less than compensation block 19 " the 4th length L 4.
Fiber grating 18 " preferably directly be fixed to compensation block 19 with surperficial fully stickup of Instant cement " on.
When being subjected to temperature effect and influencing, rise to example with environment temperature, whole device 10 " will expand.Because quartz substrate 12 " thermal expansivity much smaller than derby 14 " and compensation block 19 " thermal expansivity, so can ignore quartz substrate 12 " bulking effect.
As a complete unit, have only derby 14 " towards compensation block 19 than soft material " the direction expansion, thereby make compensation block 19 " drive fiber grating 18 " axial compression, thereby make fiber grating 18 " oppositely withdrawn by the temperature grating wavelength that influences and increase that rises, can avoid fiber grating 18 thus " centre wavelength produce skew.The design of the relative length of derby and compensation block can be with reference to first embodiment as the aforementioned, yet this embodiment need consider the Young modulus between derby and the compensation block, so that the derby young's modulus is greater than the Young modulus of compensation block.
Fig. 4 E has shown the process flow diagram of method of the fiber grating temperature compensator of shop drawings 3.
With reference to figure 3A, as shown in Figure 3 the fiber grating temperature compensator 10 of the 3rd embodiment among the present invention " can comprise a manual adjusting gear 20 in addition ", it is along substrate 12 " vertically be located at substrate 12 coaxially " on.In the embodiment shown in Fig. 3 A, in substrate 12 " the other end be formed with one second groove 22 ", and along substrate 12 " longitudinal separation be provided with two arms 221 " and 222 ".One has dextrorotation screw thread 26 " and derotation screw thread 28 " screw rod 24 " can be along substrate 12 " and vertically stride be located at second groove 22 " on, this dextrorotation screw thread 26 wherein " and derotation screw thread 28 " be incorporated into arm 221 respectively " and 222 " on.
Mode according to this is when at the manual rotary screw 24 of a direction " time, this screw rod 24 then " promptly order about arm 222 " displacement is with near arm 221 gradually ".When manually rotate this screw rod 24 at other direction ", this screw rod 24 then " order about arm 222 " displacement is with away from arm 221 gradually ".Derby 14 " and second arm 222 " between formedly receive compensation block 19 in order to hold " so the space can be by manual adjustment slightly.Because fiber grating 18 " be bonded to compensation block 19 along its surface " on, and compensation block 19 " be located at derby 14 " and second arm 222 " between, so fiber grating 18 " tension force and length can be by rotating screw bolt 24 " carry out manual adjustment.
Fig. 8 A and Fig. 8 B have shown two kinds of process flow diagrams of method of the fiber grating temperature compensator of shop drawings 6.Wherein, the alleged device of Fig. 8 A and 8B is at first to determine the longitudinal length L5 of point of fixity 663 and thin slice 64, obtain after the other end of optical fiber 66 being fixed on the point of fixity 662 in the substrate 62 again according to above-mentioned formula.
The 4th embodiment
Fig. 6 has shown the fiber grating temperature compensator 6 of an a fourth embodiment in accordance with the invention, and it comprises: a substrate 62, an optical fiber compression set, an and optical fiber 66.Among this embodiment, the optical fiber compression set comprises layer of metal thin slice (film) 64, its thermal expansivity is greater than the thermal expansivity of substrate 62, and one is firmly around being coated on a section of optical fiber 66, this optical fiber 66 vertically fixedly is bonded in the substrate 62 along it, and wherein the stage casing of optical fiber 66 is provided with read-write grating 68.
As shown in Figure 6, form one first groove 622 in the substrate 62; First length L 1 of this first groove 122 is greater than the 5th length L 5 of thin slice 64, so that thin slice 64 can be along the longitudinal dilatation of optical fiber 66 in first groove 622.
Quartz material is preferably adopted in substrate 62, and thin slice 64 is preferably made by for example potpourri of metal material such as aluminium or copper or metal powder and epoxy resin.In this embodiment, optical fiber 66 has two ends, and it is fixed in the substrate 62 at first point of fixity 662 and second point of fixity, 663 places respectively, and makes the grating 68 of optical fiber 66 and thin slice 64 all between two point of fixity 662 and 663.
Fiber grating 68 preferably is fixed in the substrate with Instant cement imposing under the state of pretension.
When being subjected to temperature effect and influencing, rise to example with environment temperature, whole device 6 will expand.Because the thermal expansivity of quartz substrate 62 much smaller than the thermal expansivity of golden thin slice 64, therefore can be ignored the bulking effect of quartz substrate 62.
Because fiber grating 68 and thin slice 64 are all between two point of fixity 662 and 663, and the thermal expansivity of thin slice 64 is greater than the thermal expansivity of substrate 62, therefore have only thin slice 64 to expand towards fiber grating 68 with respect to substrate 62, and then with respect to point of fixity 662 extruding fiber gratings 68, the grating wavelength that makes fiber grating 68 influenced by the temperature rising and increase is oppositely withdrawn, make the unlikely variation of grating wavelength, can avoid the centre wavelength of fiber grating 68 to produce skew thus.
The length of thin slice 64 can be determined with reference to being designed as the described formula of first embodiment.
With reference to figure 6A, the fiber grating temperature compensator 6 of the present invention the 4th embodiment as shown in Figure 6 can comprise a manual adjusting gear 60 in addition, similar manual adjusting device 20,20 ' and 20 shown in Figure 1A, 2A and 3A "; it vertically is arranged in the substrate 62 coaxially along substrate 62, so that manual adjustment is along the vertically axial tensile force of the optical fiber 66 between two point of fixity 662 and 663 of substrate 62.
The 5th embodiment
Fig. 7 has shown according to a fifth embodiment of the invention a fiber grating temperature compensator 7, and it comprises: a substrate 72, an optical fiber compression set, an and optical fiber 76.Among this embodiment, the optical fiber compression set comprises a unsteady derby 74, it vertically is fixed in optical fiber on point of fixity 741 and 742 along optical fiber 76, and its thermal expansivity is greater than the thermal expansivity of substrate 72, this optical fiber 76 vertically is fixed in the substrate 72 along it, and wherein the stage casing of optical fiber 76 is provided with read-write grating 78.
As shown in Figure 7, form one first groove 722 in the substrate 72; First length L 1 of this first groove 722 greater than the derby 74 that floats the 6th length L 6 can be in first groove 722 so that float derby 74 along the longitudinal dilatation of optical fiber 76.
Quartz material is preferably adopted in substrate 72, and 74 of the derbies that float are preferably made by aluminium or stainless steel.In this embodiment, optical fiber 76 has two ends, and it is fixed in the substrate 72 at first point of fixity 762 and second point of fixity, 763 places respectively, and makes the grating 78 of optical fiber 76 and float derby 74 all between two point of fixity 762 and 763.
Fiber grating 78 preferably is fixed on substrate 72 and/or the unsteady derby 74 with Instant cement imposing under the state of pretension.
When being subjected to temperature effect and influencing, rise to example with environment temperature, whole device 7 will expand.Because the thermal expansivity of quartz substrate 72 much smaller than the thermal expansivity of the derby 74 that floats, therefore can be ignored the bulking effect of quartz substrate 72.
Because fiber grating 78 and unsteady derby 74 are all between two point of fixity 762 and 763, and the thermal expansivity of the derby 74 that floats is greater than the thermal expansivity of substrate 72, therefore have only unsteady derby 74 to expand towards fiber grating 78 with respect to whole device 7, and then with respect to point of fixity 762 extruding fiber gratings 78, the grating wavelength that makes fiber grating 78 influenced by the temperature rising and increase is oppositely withdrawn, make the unlikely variation of grating wavelength, can avoid the centre wavelength of fiber grating 78 to produce skew thus.
The length of the distance between the point of fixity 741 and 742 and the derby 74 that floats can be determined with reference to being designed as the described formula of first embodiment.
Preferably, this unsteady derby 74 adheres in the substrate 72 by elastic deformation viscose glue (for example rubber or flexible glue), so that the derby 74 that should float can vertically freely expanding along optical fiber 76.
Fig. 8 C and 8D have shown three kinds of process flow diagrams of method of the fiber grating temperature compensator of shop drawings 7; Shown in Fig. 8 C and 8D, be fixed on the point of fixity 762 of substrate 72 at a end with optical fiber 76 before, can be according to the longitudinal length L6 of at first selected point of fixity 763 of aforementioned formula and thin derby 74.
With reference to figure 7A, the fiber grating temperature compensator 7 of the 5th embodiment as shown in Figure 7 of the present invention can comprise a manual adjusting gear 70 in addition, similar manual adjusting device 20,20 ' shown in Figure 1A, 2A, 3A and 6A, 20 " and 60; it vertically is arranged in the substrate 72 coaxially along substrate 72, so that manual adjustment along the vertically axial tensile force of the optical fiber 76 between two point of fixity 762 and 763 of substrate 72.Compare with the fiber grating temperature compensator of traditional employing bimetal structure, compensation system of the present invention has simple in structure and saves advantage such as manufacture process.According to the first embodiment of the present invention, when the length of selected derby, already consider the problem that heat energy can be conducted to fast derby, so that the reaction time of the thermal expansion of immediate reaction fiber grating; According to a second embodiment of the present invention, can save the positioning time of gluing; According to first and second embodiment of the present invention, fiber grating at high temperature is fixed on this device with the AB high temperature setting glue again, has therefore save necessity of bestowing preload, if combine with fiber grating annealing, can further save manufacturing step again; A third embodiment in accordance with the invention again, fiber grating is fixed on this device with glue under the normal temperature condition of no preload, has therefore save necessity of bestowing preload.
Based on the 4th and the 5th embodiment, because sheet metal 64 or unsteady derby 74 can be incorporated on the optical fiber in any position between optical fiber 66 or 76 first, second point of fixity in substrate 62 or 72, so the design of this fiber grating temperature compensator and make and can simplify more.
Below this explanation is had been described in detail, but above description does not constitute the restriction to the scope of the present invention.To those skilled in the art, also can carry out various equivalences and change it, these variations all should be included in spirit of the present invention and the scope.
Claims (46)
1. fiber grating temperature compensator is characterized in that it comprises:
One substrate, it has one first thermal expansivity, and is formed with the groove with one first length thereon;
The optical fiber compression set;
One optical fiber, it has a grating, and this grating is fixed on this optical fiber compression set.
2. device according to claim 1, it is characterized in that, this optical fiber compression set comprises one first derby, it has second thermal expansivity and second length less than this first length much larger than this first thermal expansivity, this derby is fixed to an end of the groove of this substrate, makes and forms a space between substrate and the derby; This optical fiber has one first end and one second end, and this first end is fixed on first derby, is fixed on the suprabasil fixture and second end is fixed in one, and this fixture is arranged in the groove of substrate, and is provided with at interval with this first metalwork.
3. device according to claim 1 is characterized in that, this optical fiber compression set comprises:
One first derby, it has second thermal expansivity and second length less than this first length much larger than this first thermal expansivity, and this derby is fixed to an end of the groove of this substrate, makes and forms a space between substrate and the derby;
One compensation block, it is made than derby and the lower soft material of substrate by rigidity, and has the 4th length that just can be contained in this space; And
Wherein the total length of grating is slightly less than the 4th length of compensation block, and is vertically sticked on the compensation block by complete surface along it.
4. device according to claim 1, it is characterized in that, this optical fiber compression set comprises a thin slice, it has much larger than second thermal expansivity of this first thermal expansivity and the 5th length less than this first length, this thin slice is firmly around on the optical fiber that is coated on the groove that is arranged in substrate so that this thin slice can be in groove along vertical free expansion of optical fiber; Wherein this optical fiber has two ends, and they are respectively along vertically being fixed in the substrate at one first point of fixity and in one second fixed point of optical fiber, so that fiber grating and thin slice be between first and second point of fixity, and is positioned among the groove of substrate.
5. device according to claim 4 is characterized in that, the thin slice of this compression set is coated on the optical fiber by aluminium or copper one.
6. device according to claim 5 is characterized in that, the thin slice of this compression set is solidify to form on optical fiber by the potpourri one of metal powder and epoxy resin.
7. device according to claim 1, it is characterized in that, this compression set comprises a unsteady derby, it has much larger than second thermal expansivity of first thermal expansivity and the 6th length less than this first length, the derby that should float is arranged in along being vertically fixed in of optical fiber on the optical fiber of groove of substrate so that the derby that floats can be in groove along vertical free expansion of optical fiber; And wherein this optical fiber has two ends, they are vertically being fixed in the substrate at one first point of fixity and in one second fixed point along optical fiber respectively, float derby between first and second point of fixity so that fiber grating reaches, and be positioned among the groove of substrate.
8. device according to claim 7 is characterized in that, this unsteady derby is adhered in the substrate with the viscose glue of elastically deformable so that the derby that should float can be in the groove of substrate along the longitudinal dilatation of optical fiber.
9. device according to claim 1, it is characterized in that, it also comprises a manual adjusting gear, this manual adjusting device comprises: be integrally formed at an end of substrate and the first arm and second arm that is provided with along the vertical space of substrate, and the screw rod with one section dextrorotation screw thread and one section derotation screw thread, wherein this dextrorotation screw thread and derotation screw thread are incorporated into respectively on the first arm and second arm, so that the first arm and second arm can vertically relatively moving along substrate when screw rod rotates.
10. fiber grating temperature compensator is characterized in that it comprises:
One substrate, it has one first thermal expansivity, and is formed with the groove with one first length thereon;
One first derby, it has second thermal expansivity and second length less than this first length much larger than this first thermal expansivity, and this first derby is fixed to an end of the groove of this substrate, makes and forms a space between substrate and the derby; And
One has the optical fiber of a grating, this grating has first end and second end, and wherein this first end is fixed on first derby, is fixed on the suprabasil fixture and second end is fixed in one, this fixture is arranged in the groove of substrate, and is provided with at interval with this first derby.
11. device according to claim 10 is characterized in that, this first derby contacts with the part of the grating that is adjacent to this first derby.
12. device according to claim 10 is characterized in that, this fixture is the part of substrate.
13. device according to claim 10, it is characterized in that, it also comprises a manual adjusting gear, this manual adjusting device comprises: be integrally formed at an end of substrate and the first arm and second arm that is provided with along the vertical space of substrate, and the screw rod with one section dextrorotation screw thread and one section derotation screw thread, wherein this dextrorotation screw thread and derotation screw thread are incorporated into respectively on this first arm and second arm so that the first arm and second arm when screw rod rotates can along substrate vertically relative to oppositely moving.
14. device according to claim 10, it is characterized in that, this is fixed in suprabasil fixture is one second derby, it has one second thermal expansivity and one the 3rd length, wherein this second length and the 3rd length and less than this first length, first and second derby is fixed to the two ends of the groove of this substrate respectively, thereby forms a space between first and second derby.
15. device according to claim 14 is characterized in that, the total length of grating is slightly less than the poor of first length and second, third length summation.
16. device according to claim 10 is characterized in that, optical fiber is solidifying adhesive curing to substrate and/or derby with AB under 100 ℃ the state.
17. device according to claim 10 is characterized in that, fiber grating is fixed on substrate and/or the derby with Instant cement imposing under the state of pretension.
18. device according to claim 10 is characterized in that substrate is made by quartz material.
19. device according to claim 10 is characterized in that derby is made by aluminium.
20. device according to claim 10 is characterized in that derby is made by stainless steel.
21. a fiber grating temperature compensator is characterized in that it comprises:
One substrate, it has one first thermal expansivity, and is formed with the groove with one first length thereon;
One first derby, it has second thermal expansivity and second length less than this first length much larger than this first thermal expansivity, and this first derby is fixed to an end of the groove of this substrate, makes and forms a space between substrate and the derby;
One compensation block, it is by making than derby and the soft material of substrate, and has the 4th length that just can be fixed in the described space; And
One optical fiber, section is provided with grating therein, the total length of this grating is slightly less than the 4th length, wherein when optical fiber along it vertically when fully the surface sticks on the compensation block, the grating of optical fiber partly is positioned at this compensation block place just.
22. device according to claim 21 is characterized in that substrate is made by quartz material.
23. device according to claim 21 is characterized in that derby is made by aluminium.
24. device according to claim 21 is characterized in that derby is made by stainless steel.
25. device according to claim 21, it is characterized in that, it also comprises a manual adjusting gear, this manual adjusting device comprises: be integrally formed at an end of substrate and the first arm and second arm that is provided with along the vertical space of substrate, and the screw rod with one section dextrorotation screw thread and one section derotation screw thread, wherein this dextrorotation screw thread and derotation screw thread are incorporated into respectively on this first arm and second arm so that the first arm and second arm when screw rod rotates can along substrate vertically relative to oppositely moving.
26. a method of making fiber grating temperature compensator is characterized in that it may further comprise the steps:
(a) provide a substrate with one first thermal expansivity and a groove, this groove has one first length;
(b) provide one first derby, it has second thermal expansivity and second length less than this first length much larger than this first thermal expansivity;
(c) this first derby is fixed to an end of the groove of substrate;
(d) provide one therein section be provided with the optical fiber of grating;
(e) end with optical fiber is fixed on this first derby;
(f) a selected point of fixity on this device; And
(g) vertically its other end is fixed on this point of fixity along optical fiber.
27. method according to claim 26 is characterized in that, this point of fixity is positioned in the substrate away from this first derby.
28. method according to claim 26 is characterized in that, (d) is further comprising the steps of before in step:
(c-1) provide one second derby, it has one second thermal expansivity and one the 3rd length, and the 3rd length is poor less than this first length and second length; And
(c-2) this second derby is fixed to the other end of the groove of substrate, makes and form a space between first and second derby.
29. method according to claim 28 is characterized in that, this point of fixity is positioned on second derby.
30. method according to claim 26 is characterized in that, it further comprises the following step:
(h) this device is placed under the condition of high temperature.
31. method according to claim 30 is characterized in that, this optical fiber solidifies glue by AB and is being fixed on substrate and the derby under the condition of high temperature.
32. method according to claim 31 is characterized in that, it further comprises the following step:
(i) continue to place high temperature to assign a schedule time in this device, so that fiber grating is annealed.
33. method according to claim 26 is characterized in that, (e) also comprises the following steps: before in step
(d-1) optical fiber is imposed pretension.
34. method according to claim 26 is characterized in that substrate is made by quartz material.
35. method according to claim 26 is characterized in that derby is made by aluminium.
36. method according to claim 26 is characterized in that derby is made by stainless steel.
37. a method of making fiber grating temperature compensator is characterized in that it may further comprise the steps:
(a) provide a substrate with one first thermal expansivity and a groove, this groove has one first length;
(b) provide one first derby, it has second thermal expansivity and second length less than this first length much larger than this first thermal expansivity.
(c) first derby is fixed to an end of the groove of substrate, makes and form a space between first derby and the substrate;
(d) provide a compensation block, it is by making than substrate and the soft material of derby;
(e) this compensation block is fixed in the described space;
(f) provide one therein section be provided with the optical fiber of first grid; And
(g) its grating that vertically makes along this optical fiber is sticked on the compensation block by complete surface.
38., it is characterized in that substrate is made by quartz material according to the described method of claim 37.
39., it is characterized in that derby is made by aluminium according to the described method of claim 37.
40., it is characterized in that derby is made by stainless steel according to the described method of claim 37.
41. a fiber grating temperature compensator is characterized in that it comprises:
One substrate, it has one first thermal expansivity, and is formed with the groove with one first length thereon;
One has the optical fiber of a grating, it has first end and second end, and wherein this first end is fixed on this first derby, is fixed on the suprabasil fixture and this second end is fixed in one, this fixture is arranged in the groove of substrate, and is provided with at interval with this first derby;
One thin slice, it has much larger than the 3rd thermal expansivity of this first thermal expansivity and the 5th length less than first length, this thin slice is firmly around on the optical fiber that is coated on the groove that is arranged in substrate so that this thin slice can be in groove along vertical free expansion of optical fiber.
42., it is characterized in that this thin slice is solidify to form on optical fiber by the potpourri one of metal powder and epoxy resin according to the described device of claim 41.
43. according to the described device of claim 41, it is characterized in that, it also comprises a manual adjusting gear, this manual adjusting device comprises: be integrally formed at an end of substrate and the first arm and second arm that is provided with along the vertical space of substrate, and the screw rod with one section dextrorotation screw thread and one section derotation screw thread, wherein this dextrorotation screw thread and derotation screw thread are incorporated into respectively on this first arm and second arm so that this first arm and second arm when screw rod rotates can along substrate vertically relative to oppositely moving.
44. a fiber grating temperature compensator is characterized in that it comprises:
One substrate, it has one first thermal expansivity, and is formed with the groove with one first length thereon;
One has the optical fiber of a grating, it has first end and second end, and wherein this first end is fixed on one first derby, is fixed on the suprabasil fixture and this second end is fixed in one, this fixture is arranged in the groove of substrate, and is provided with at interval with this first derby;
One unsteady derby, it has much larger than second thermal expansivity of first thermal expansivity and the 6th length less than this first length, the derby that should float be arranged in the optical fiber of the groove of substrate along being vertically fixed in of optical fiber so that the derby that floats can be in groove along vertical free expansion of optical fiber.
45., it is characterized in that this unsteady derby is adhered in the substrate by the viscose glue of elastically deformable according to the described device of claim 44 so that the derby that should float can be in the groove of substrate along the longitudinal dilatation of optical fiber.
46. according to the described device of claim 44, it is characterized in that, it also comprises a manual adjusting gear, this manual adjusting device comprises: be integrally formed at substrate an end and along substrate vertically apart from one another by the first arm and second arm that are provided with, and the screw rod with one section dextrorotation screw thread and one section derotation screw thread, wherein this dextrorotation screw thread and derotation screw thread are incorporated into respectively on this first arm and second arm so that this first arm and second arm when screw rod rotates can along substrate vertically relative to oppositely moving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01118519 CN1244827C (en) | 2001-05-29 | 2001-05-29 | Fiber grating temperature compensator and its making process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01118519 CN1244827C (en) | 2001-05-29 | 2001-05-29 | Fiber grating temperature compensator and its making process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1388388A true CN1388388A (en) | 2003-01-01 |
| CN1244827C CN1244827C (en) | 2006-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01118519 Expired - Lifetime CN1244827C (en) | 2001-05-29 | 2001-05-29 | Fiber grating temperature compensator and its making process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324188B (en) * | 2008-07-28 | 2012-05-02 | 西安石油大学 | Inner pressure type temperature compensation high-temperature high-pressure optical fiber grating sensor |
| CN102853856A (en) * | 2012-07-24 | 2013-01-02 | 中国电子科技集团公司第八研究所 | Method for eliminating chirping phenomenon of fiber grating sensor |
| CN106684678A (en) * | 2017-02-28 | 2017-05-17 | 中国科学院上海光学精密机械研究所 | Temperature compensation packaging device for fiber laser |
| CN108775980A (en) * | 2018-03-16 | 2018-11-09 | 上海交通大学 | Rail safety detection device and its detection method based on multifiber cable structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100523754C (en) * | 2006-12-28 | 2009-08-05 | 中国科学院半导体研究所 | Optical fibre pressure intensity sensor based on beam of constant strength |
-
2001
- 2001-05-29 CN CN 01118519 patent/CN1244827C/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324188B (en) * | 2008-07-28 | 2012-05-02 | 西安石油大学 | Inner pressure type temperature compensation high-temperature high-pressure optical fiber grating sensor |
| CN102853856A (en) * | 2012-07-24 | 2013-01-02 | 中国电子科技集团公司第八研究所 | Method for eliminating chirping phenomenon of fiber grating sensor |
| CN106684678A (en) * | 2017-02-28 | 2017-05-17 | 中国科学院上海光学精密机械研究所 | Temperature compensation packaging device for fiber laser |
| CN108775980A (en) * | 2018-03-16 | 2018-11-09 | 上海交通大学 | Rail safety detection device and its detection method based on multifiber cable structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1244827C (en) | 2006-03-08 |
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