CN206627653U - The fiber grating and fiber grating making apparatus of a kind of pre-twist structure - Google Patents
The fiber grating and fiber grating making apparatus of a kind of pre-twist structure Download PDFInfo
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- CN206627653U CN206627653U CN201720322125.5U CN201720322125U CN206627653U CN 206627653 U CN206627653 U CN 206627653U CN 201720322125 U CN201720322125 U CN 201720322125U CN 206627653 U CN206627653 U CN 206627653U
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Abstract
The utility model provides the fiber grating and fiber grating making apparatus of a kind of pre-twist structure, the fiber grating includes several screen periods, forms LPFG or the LPFG of negative sense spiral deformation pre-twist structure or the LPFG of positive and negative turn of the screw deformation pre-twist structure with transport screw deformation pre-twist structure.Making the equipment of the fiber grating includes：Heater, for the machining area of optical fiber to be processed to be heated into melting state；Three-dimensional mobile platform device, for moving horizontally the optical fiber to be processed；Rotating device, for twisting the optical fiber to be processed, machining area is introduced pre- torsion and is produced deformation, form pre-twist structure.Fiber grating provided by the utility model with pre-twist structure, not only high sensitivity, and the structure complexity of its making apparatus is low, therefore it is more applicable for practical application.
Description
Technical field
The utility model is related to Fabrication Methods of Fiber Gratings field, more particularly to a kind of fiber grating of pre-twist structure and
Fiber grating making apparatus.
Background technology
Fiber grating has the characteristics that small volume, low-loss, coupling is high and wavelength selectivity is good, therefore in optical fiber
Sensory field has extensive purposes.Existing fiber grating on general single mode fiber generally by directly passing through titanium dioxide
The method of carbon laser radial scan enters row write system, but the fiber grating sensitivity prepared in this way is not high；Also one
While kind is using carbon dioxide laser exposure, circulator drives fiber spinning, displacement platform to move horizontally to prepare screw type
LPFG, although this fiber grating sensitivity with continuous helical structure is higher, due to for rotation
The axiality for turning device rotation requires very high, and the circulator anglec of rotation, speed, carbon dioxide energy size when helical modulation
Require very high with the matching degree of the variable such as displacement platform, therefore the preparation technology of screw type fiber grating is complicated, is not suitable for reality
Apply on border.
Utility model content
The utility model provides a kind of fiber grating of pre-twist structure, fiber grating making apparatus, it is intended to solves existing
There is the problem of fiber grating complex manufacturing technology of fabrication techniques.
In order to solve the above technical problems, the utility model provides a kind of fiber grating with pre-twist structure：
The fiber grating includes several screen periods, and the machining area of each screen periods has transport screw
The pre-twist structure of deformation or the pre-twist structure of negative sense spiral deformation；
Several described screen periods form the LPFG or negative with transport screw deformation pre-twist structure
The long period optical fiber of LPFG or positive and negative turn of the screw deformation pre-twist structure to spiral deformation pre-twist structure
Grating.
The utility model additionally provides a kind of fiber grating making apparatus, and the making apparatus fills including three-dimensional mobile platform
Put, heater and rotating device：
The three-dimensional mobile platform device, for horizontal positioned optical fiber to be processed；
The heater, for being heated to the machining area of the optical fiber to be processed according to default heating means,
Melt so that the machining area is heated；
The rotating device, it is in molten for the both ends of the machining area to be clamped respectively, and in the machining area
After melting state, the both ends of the machining area are reversed in opposite directions according to default rule of reversing, so that the machining area
Deformation is produced under twisting force, forms the pre-twist structure with transport screw deformation or the pre-twist of negative sense spiral deformation
Structure；
The three-dimensional mobile platform device, it is additionally operable to drive the optical fiber to be processed in the same direction, moves horizontally every time
The distance of one screen periods, so as to which all machining areas are processed into pre-twist structure successively, obtain that there is positive spiral shell
Revolve the long week of deformation pre-twist structure or negative sense spiral deformation pre-twist structure or positive and negative turn of the screw deformation pre-twist structure
Phase fiber grating.
Further, the making apparatus also includes monitoring device, real for being used in the manufacturing process of fiber grating
When monitoring write the fiber grating parameter of system.
Further, the monitoring device includes light source and spectrometer, the both ends of the optical fiber to be processed respectively with it is described
Light source, spectrometer connection；The light source, for being lighted in fiber grating manufacturing process so that light path connects；The light
Spectrometer, for monitoring the spectral signal of the fiber grating in real time in the fiber grating manufacturing process.
Further, the default torsion rule includes：
It is one group to define the adjacent machining area of each two, and the adjacent machining area of each two is respectively that n-th adds
Work area domain and the N+1 machining area, wherein, N is positive integer；
The rotating device is reversed in opposite directions to the both ends of the n-th machining area, so that the n-th processing district
Domain is twisted to predetermined angle according to assigned direction, and the rotating device continues the both ends progress to the N+1 machining area
Opposite direction is reversed in opposite directions, so that the N+1 machining area is twisted to the predetermined angle according to the opposite direction of assigned direction,
To obtain that there is the LPFG of positive and negative turn of the screw deformation pre-twist structure；
Or, the rotating device is reversed in opposite directions to the both ends of the n-th machining area, so that the n-th adds
Work area domain is twisted to predetermined angle according to assigned direction, and the rotating device continues the both ends to the N+1 machining area
Reversed in opposite directions, so that the N+1 machining area is twisted to the predetermined angle according to assigned direction, to be had
The long week of the LPFG of the pre-twist structure of transport screw deformation or pre-twist structure with negative sense spiral deformation
Phase fiber grating.
Compared with prior art, beneficial effect is the utility model：
The utility model provides a kind of fiber grating of pre-twist structure, and the fiber grating includes several gratings week
Phase；The machining area of each screen periods have transport screw deformation pre-twist structure or negative sense spiral deformation it is pre-
Distorted-structure.Several screen periods form LPFG or negative sense with transport screw deformation pre-twist structure
The long period optical fiber light of the LPFG of spiral deformation pre-twist structure or positive and negative turn of the screw deformation pre-twist structure
Grid.And make the fiber grating with pre-twist structure, not only high sensitivity, and the structure complexity of its making apparatus
It is low, therefore it is more applicable for practical application.
Brief description of the drawings
Fig. 1 is the fiber grating schematic diagram with pre-twist structure that the utility model embodiment provides；
Fig. 2 is the fiber grating making apparatus schematic diagram that the utility model embodiment provides；
Fig. 3 is the fiber grating making apparatus schematic diagram that the utility model embodiment provides；
Fig. 4 is the fiber grating making apparatus schematic diagram that the utility model embodiment provides；
Fig. 5 is the utility model embodiment offer in torque magnitude and spectrum change mapping schematic diagram；
Fig. 6 is the utility model embodiment offer in windup-degree size and spectrum change mapping schematic diagram.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
As first embodiment of the present utility model, as shown in figure 1, the utility model, which provides one kind, has pre-twist knot
The fiber grating of structure：
The fiber grating includes several screen periods, and the machining area of each screen periods has transport screw
The pre-twist structure of deformation or the pre-twist structure of negative sense spiral deformation；
Several described screen periods form the LPFG or negative with transport screw deformation pre-twist structure
The long period optical fiber of LPFG or positive and negative turn of the screw deformation pre-twist structure to spiral deformation pre-twist structure
Grating.
Fiber grating with pre-twist structure as shown in Figure 1, is divided according to certain grating pitch dividing mode
For multiple screen periods.In the present embodiment, grating pitch is typically defined on 300 μm to 700 μm or so, and machining area
Length is typically defined between 50 μm to 100 μm.
In theory, the prerequisite that form LPFG is uniform index modulation, therefore processing every time
The windup-degree in region should be the same, can be only achieved and modulate uniform purpose, but pretwist provided by the utility model
The fiber grating of bent structure, if its pre-twist irregular structure or uneven, also in the range of the utility model is protected.Example
Such as：Some has several machining areas that the LPFG of pre-twist structure is included, this several machining area
In, each machining area can have the pre-twist structure of equal angular, can also have the pre-twist structure of different angle respectively.
The fiber grating of pre-twist structure provided by the utility model, if the pre-twist structure with other cyclomorphosises
Also in the scope of protection of the utility model, for example, the 1st, the 2nd machining area is the pre-twist knot of transport screw deformation
Structure, the 3rd, the 4th machining area are the pre-twist structure of equal negative sense spiral deformation, and the 5th, the 6th machining area is forward direction again
The pre-twist structure of spiral deformation, the 7th, the 8th machining area are the pre-twist structure of negative sense spiral deformation again, successively class
Push away, ultimately form the LPFG of the pre-twist structure of the spiral deformation with positive and negative negative regular periods.Similarly, press
According to negative and positive just, positive and negative negative, negative and positive just or the positive and negative pre-twist structure of the spiral deformation of regular period-producer such as negative
Fiber grating is in the protection domain of this patent.
It should be noted that because the machining area in each screen periods is pre-twist structure, other regions are non-pre-
Distorted-structure, when several screen periods form a LPFG, the LPFG is with non-company
The fiber grating of continuous property pre-twist structure.
In summary, the fiber grating that the utility model first embodiment is provided, by simple manufacture craft and
Making apparatus, the fiber grating of the pre-twist structure with noncontinuity is produced, needs to adopt in the prior art so as to avoid
The problem of fiber grating with continuity helical structure being manufactured with the manufacture craft of complexity.And light provided by the utility model
Fine grating high mechanical strength, favorable repeatability, applicability are stronger.
As second embodiment of the present utility model, made as shown in Fig. 2 the utility model provides a kind of fiber grating
Equipment, the making apparatus include heater 22, rotating device 33 and three-dimensional mobile platform device 44：
Three-dimensional mobile platform device 44, for horizontal positioned optical fiber 11 to be processed；
Heater 22, for being heated to the machining area of optical fiber 11 to be processed according to default heating means, so that
The machining area is heated to be melted；
Rotating device 33, for the both ends of the machining area of optical fiber 11 to be processed to be clamped respectively, and in the machining area
During in molten condition, the both ends of the machining area are reversed in opposite directions according to default rule of reversing, so that described add
Work area domain produces deformation under twisting force, the pre-twist structure that obtains having transport screw deformation or negative sense spiral deformation
Pre-twist structure；
Three-dimensional mobile platform device 44, it is additionally operable to drive the optical fiber to be processed 11 in the same direction, moves horizontally every time
The distance of one screen periods, so as to which all machining areas are fabricated into pre-twist structure successively, obtain with transport screw shape
Become pre-twist structure or the long period light of negative sense spiral deformation pre-twist structure or positive and negative turn of the screw deformation pre-twist structure
Fine grating.Wherein, optical fiber 11 to be processed in the axial direction, several screen periods is divided into according to default grating pitch, when
When between each grating pitch is defined between 300 μm to 700 μm, the length of machining area is defined on 50 μm to 100 μm, make
LPFG out can be optimal effect, and in the present embodiment, grating pitch is defined as 420 μm.
In summary, the making apparatus for the fiber grating that the utility model second embodiment is provided, making have pretwist
The high sensitivity of the fiber grating of bent structure, the not only fiber grating, and its making apparatus apparatus structure is simple, therefore more
Suitable for practical application.
As 3rd embodiment of the present utility model, as shown in Figure 3 and Figure 4, the utility model additionally provides a kind of optical fiber
Raster manufacture device, the making apparatus include heater 22, rotating device 33 and three-dimensional mobile platform device 44：
Three-dimensional mobile platform device 44, for horizontal positioned optical fiber 11 to be processed；
Heater 22, for being heated to the machining area of optical fiber 11 to be processed according to default heating means, so that
The machining area is heated to be melted；
Rotating device 33, for the both ends of the machining area of optical fiber 11 to be processed to be clamped respectively, and in the machining area
During in molten condition, the both ends of the machining area are reversed in opposite directions according to default rule of reversing, so that described add
Work area domain produces deformation under twisting force, the pre-twist structure that obtains having transport screw deformation or negative sense spiral deformation
Pre-twist structure；
It should be noted that rotating device 33 is specifically used for：When the machining area is in molten condition, according to default
Torsion rule the both ends of machining area are reversed in opposite directions so that the machining area under twisting force, is twisted to presetting
Angle, now torsion be frozen in the machining area, in the screen periods, other fiber regions in addition to machining area
Domain, due to being not in molten condition, therefore torsion does not have an impact to it.Meanwhile when the machining area is in rotating device
When twisting under 33 drive according to assigned direction to predetermined angle, heater 22 stops adding the machining area immediately
Heat.
Three-dimensional mobile platform device 44, it is additionally operable to drive the optical fiber to be processed 11 in the same direction, moves horizontally every time
The distance of one screen periods, so as to which all machining areas are fabricated into pre-twist structure successively, obtain with transport screw shape
Become pre-twist structure or the long period light of negative sense spiral deformation pre-twist structure or positive and negative turn of the screw deformation pre-twist structure
Fine grating.Wherein, optical fiber 11 to be processed in the axial direction, several screen periods is divided into according to default grating pitch, when
When between each grating pitch is defined between 300 μm to 700 μm, the length of machining area is defined on 50 μm to 100 μm, make
LPFG out can be optimal effect, and in the present embodiment, grating pitch is defined as 420 μm, processing district
Domain is set to 50 μm or so, because the thermal source of heater has certain length, the length of thermal source is generally 50 μm to 100 μm
Between.
Further, the making apparatus also includes monitoring device, real for being used in the manufacturing process of fiber grating
When monitoring write the fiber grating parameter of system.
In the present embodiment, monitoring device includes：Light source 55 and spectrometer 66.The both ends of optical fiber to be processed respectively with light source
55th, spectrometer 66 connects；Light source 55, for being lighted in fiber grating manufacturing process so that light path connects；Spectrometer 66, is used for
Monitor the spectral signal of the fiber grating in real time in the fiber grating manufacturing process.Set monitoring device purpose be exactly
In order among the manufacturing process of fiber grating, while the fiber grating the standard whether fiber grating has reached required is monitored,
So as to judge whether the fiber grating is successful.
In the fabrication of fiber grating, by the rotation parameter of real-time adjusting rotating device, so as to be processed
Region forms different pre-twist structures under different twisting forces.Meanwhile the ginseng such as temperature of heater can be adjusted in real time
Number.Such as：Can be based on the spectral signal for monitoring to obtain in manufacturing process, it is determined that or the size of the regulation anglec of rotation, rotation in real time
Speed, the temperature etc. of heating turned.In a word, above-mentioned parameter is adjusted according to being actually needed, so as to obtain the long week of satisfaction
Phase fiber grating.
It should be noted that the optical fiber to be processed can be real core fibre, such as：Polarization maintaining optical fibre, twin-core fiber etc.；It is described
Naked fibre to be processed can be hollow-core fiber, such as：Photonic crystal fiber, photon band-gap optical fiber etc..
It should be noted that when making above-mentioned fiber grating, CO2 laser can be used as heater, can also
Heated using the heaters such as arc discharge or oxyhydrogen flame or heating means.And can be to the one side part of machining area
Heated or symmetrically heated or rotary heating etc..In a word, different heaters or different mode of heating
Can reach makes the machining area of optical fiber to be processed be in melted by heating state.
It should be noted that above-mentioned default torsion rule is specific as follows：
It is one group to define the adjacent machining area of each two, and the adjacent machining area of each two is respectively that n-th adds
Work area domain and the N+1 machining area, wherein, N is positive integer；
The rotating device is reversed in opposite directions to the both ends of the n-th machining area, so that the n-th processing district
Domain is twisted to predetermined angle according to assigned direction, and the rotating device continues the both ends progress to the N+1 machining area
Opposite direction is reversed in opposite directions, so that the N+1 machining area is twisted to the predetermined angle according to the opposite direction of assigned direction,
To obtain that there is the LPFG of positive and negative turn of the screw deformation pre-twist structure；
Or, the rotating device is reversed in opposite directions to the both ends of the n-th machining area, so that the n-th adds
Work area domain is twisted to predetermined angle according to assigned direction, and the rotating device continues the both ends to the N+1 machining area
Reversed in opposite directions, so that the N+1 machining area is twisted to the predetermined angle according to assigned direction, to be had
The long week of the LPFG of the pre-twist structure of transport screw deformation or pre-twist structure with negative sense spiral deformation
Phase fiber grating.
In the present embodiment, along the transmission direction of light, forward direction will be defined as clockwise, is counterclockwise defined as
Negative sense.Above-mentioned assigned direction can be positive, can be negative sense again.
In the present embodiment, predetermined angle is 30 degree., will be to be processed after the 1st machining area is positive to be reversed to 30 degree
Optical fiber horizontal moves the distance of a screen periods to the 2nd machining area, and the 2nd machining area is heated into molten condition,
Then by the positive torsion of the 2nd machining area to 30 degree；And then, the 3rd machining area is heated to molten condition, then will
3rd machining area is positive to be reversed to 30 degree, is performed successively according to aforesaid operations, and each machining area is all positive to be reversed to 30 degree
Size.It is effectively equivalent to, compared with the original state of the 1st machining area, reverses add 30 degree every time.I.e.：1st
Machining area is reversed to after 30 degree, compared to the original state of the 1st machining area, has reversed 30 degree；2nd machining area reverses
To after 30 degree, the original state compared to the 1st machining area has reversed 60 degree；3rd machining area is reversed to after 30 degree, is compared
The original state of 1st machining area has reversed 90 degree, and the rotation reading of rotating device is followed successively by 30/60/90/ in this case
120/150/180, by that analogy.According to the processing mode in the example above, final make obtains having transport screw deformation
The LPFG of pre-twist structure.
Drawn according to experiment, when the fiber grating of making is in zero torsion state, i.e. two adjacent machining areas
When the angle of torsion is identical, in opposite direction, when forming the fiber grating with positive and negative turn of the screw deformation pre-twist structure, the light
Fine grating has optimal effectiveness.Such as：The machining area is twisted to 50 degree, then with same with same rotary speed
Rotary speed, the N+1 machining area is twisted to -50 degree, the fiber grating now made is in zero torsion state.
As shown in figure 5, it is the corresponding spectral signal variation diagram under different torsion, as shown in fig. 6, in different torsions
Under gyration, corresponding spectral signal variation diagram.In a word, the optical fiber light with pre-twist structure made by the utility model
Torque magnitude or windup-degree size in the spectral signal and manufacturing process of grid have certain mapping relations.Reflected according to this
Relation is penetrated, can use manufacture craft provided by the utility model directly on the premise of default torsion, default windup-degree
Fiber grating is directly made, so as to avoid the need for the process of light source and spectrometer monitoring.
It should be noted that because the machining area of each screen periods is pre-twist structure, and in the screen periods, remove
Other fiber areas outside machining area are non-pre-twist structure, therefore when several screen periods form a long period light
During fine grating, the LPFG is the fiber grating with noncontinuity pre-twist structure.
Experiment is drawn, when the one side that carbon dioxide laser heater treats machining area is heated, different
Under the effect of torsion direction, the resonance peak position of spectrometer monitoring produces different drift situation.Simultaneously as pre- torsion draws
Enter so that sensitivity of the structure for applied torsion is more sensitive.It is demonstrated experimentally that swashed based on carbon dioxide on single-mode fiber
The torsion sensitivity for the Novel Long Period Fibre Gratings that pre- torsion prepared by light exposure introduces is 0.179nm/ (rad/m), is relatively passed
The torsion sensitivity of system LPFG has the lifting of an order of magnitude.
In theory, the prerequisite that form LPFG is uniform index modulation, therefore processing every time
The windup-degree in region should be the same, can be only achieved the uniform purpose of modulation, but use provided by the utility model
The fiber grating with irregular or uneven pre-twist structure produced by making apparatus is also protected in the utility model
In the range of.
And making apparatus provided by the utility model is utilized, the pre-twist structure with other period types of making
Fiber grating is also in the scope of protection of the utility model, for example, the 1st, the 2nd machining area is the pre- of transport screw deformation
Distorted-structure, the 3rd, the 4th machining area are the pre-twist structure of equal negative sense spiral deformation, and the 5th, the 6th machining area is again equal
For the pre-twist structure of transport screw deformation, the 7th, the 8th machining area is the pre-twist structure of negative sense spiral deformation again, according to
It is secondary to analogize, finally it is fabricated to the LPFG of the pre-twist structure of the spiral deformation with positive and negative negative regular periods.
Similarly, according to negative and positive just, positive and negative negative, negative and positive just or the positive and negative spiral deformation of regular period-producer such as negative pretwist
The fiber grating of bent structure is in the protection domain of this patent.
In summary, the making apparatus for the fiber grating that the utility model 3rd embodiment is provided, making have pretwist
The high sensitivity of the fiber grating of bent structure, the not only fiber grating, and its making apparatus is simple, and cost is cheap, passes through tune
The parameters such as the temperature of heater are saved, and the parameter such as the rotary speed of adjusting rotating device, anglec of rotation can improve optical fiber
The producing efficiency and quality of grating, there is higher flexibility, therefore be more applicable for practical application.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this reality not to limit utility model
With all any modification, equivalent and improvement made within new spirit and principle etc., should be included in of the present utility model
Within protection domain.
Claims (5)
- A kind of 1. fiber grating with pre-twist structure, it is characterised in that the fiber grating includes several screen periods, The machining area of each screen periods has the pre-twist structure of transport screw deformation or the pre-twist of negative sense spiral deformation Structure；Several described screen periods form LPFG or negative sense spiral shell with transport screw deformation pre-twist structure Revolve the LPFG of deformation pre-twist structure or the long period optical fiber light of positive and negative turn of the screw deformation pre-twist structure Grid.
- 2. a kind of fiber grating making apparatus, it is characterised in that the making apparatus includes three-dimensional mobile platform device, heating dress Put and rotating device：The three-dimensional mobile platform device, for horizontal positioned optical fiber to be processed；The heater, for being heated to the machining area of the optical fiber to be processed according to default heating means, so that The machining area is heated to be melted；The rotating device, molten is in for the both ends of the machining area to be clamped respectively, and in the machining area After state, the both ends of the machining area are reversed in opposite directions according to default rule of reversing, so that the machining area is being turned round Power effect is lower to produce deformation, forms the pre-twist structure with transport screw deformation or the pre-twist structure of negative sense spiral deformation；The three-dimensional mobile platform device, it is additionally operable to drive the optical fiber to be processed in the same direction, moves horizontally one every time The distance of screen periods, so as to which all machining areas are processed into pre-twist structure successively, obtain with transport screw shape Become pre-twist structure or the long period light of negative sense spiral deformation pre-twist structure or positive and negative turn of the screw deformation pre-twist structure Fine grating.
- 3. making apparatus as claimed in claim 2, it is characterised in that the making apparatus also includes monitoring device, for It is used for the fiber grating parameter for monitoring system of writing in real time in the manufacturing process of fiber grating.
- 4. making apparatus as claimed in claim 3, it is characterised in that the monitoring device includes light source and spectrometer, described The both ends of optical fiber to be processed are connected with the light source, the spectrometer respectively；The light source, for being lighted in fiber grating manufacturing process so that light path connects；The spectrometer, for monitoring the spectral signal of the fiber grating in real time in the fiber grating manufacturing process.
- 5. making apparatus as claimed in claim 2, it is characterised in that the default torsion rule includes：It is one group to define the adjacent machining area of each two, and the adjacent machining area of each two is respectively n-th processing district Domain and the N+1 machining area, wherein, N is positive integer；The rotating device is reversed in opposite directions to the both ends of the n-th machining area, so that the n-th machining area is pressed Twisted according to assigned direction to predetermined angle, the rotating device continues to carry out negative side to the both ends of the N+1 machining area Reversed to opposite, so that the N+1 machining area is twisted to the predetermined angle according to the opposite direction of assigned direction, with To the LPFG with positive and negative turn of the screw deformation pre-twist structure；Or, the rotating device is reversed in opposite directions to the both ends of the n-th machining area, so that the n-th processing district Domain is twisted to predetermined angle according to assigned direction, and the rotating device continues the both ends progress to the N+1 machining area It is opposite to reverse, so that the N+1 machining area is twisted to the predetermined angle according to assigned direction, to obtain having forward direction The LPFG of the pre-twist structure of spiral deformation or with negative sense spiral deformation pre-twist structure long period light Fine grating.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720322125.5U CN206627653U (en) | 2017-03-30 | 2017-03-30 | The fiber grating and fiber grating making apparatus of a kind of pre-twist structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720322125.5U CN206627653U (en) | 2017-03-30 | 2017-03-30 | The fiber grating and fiber grating making apparatus of a kind of pre-twist structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106842417A (en) * | 2017-03-30 | 2017-06-13 | 深圳大学 | The fiber grating of pre-twist structure, fiber grating making apparatus and technique |
| CN109471216A (en) * | 2018-11-27 | 2019-03-15 | 华中科技大学 | One kind being based on bilateral CO2The preparation method of Myocardial revascularization bylaser spiral long-period fiber grating |
-
2017
- 2017-03-30 CN CN201720322125.5U patent/CN206627653U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106842417A (en) * | 2017-03-30 | 2017-06-13 | 深圳大学 | The fiber grating of pre-twist structure, fiber grating making apparatus and technique |
| CN106842417B (en) * | 2017-03-30 | 2023-03-10 | 深圳大学 | Fiber grating with pre-twisted structure, and manufacturing equipment and process of fiber grating |
| CN109471216A (en) * | 2018-11-27 | 2019-03-15 | 华中科技大学 | One kind being based on bilateral CO2The preparation method of Myocardial revascularization bylaser spiral long-period fiber grating |
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