CN113300199A - Coiling device for filtering stray light in optical fiber and stray light filtering method - Google Patents
Coiling device for filtering stray light in optical fiber and stray light filtering method Download PDFInfo
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- CN113300199A CN113300199A CN202110591815.1A CN202110591815A CN113300199A CN 113300199 A CN113300199 A CN 113300199A CN 202110591815 A CN202110591815 A CN 202110591815A CN 113300199 A CN113300199 A CN 113300199A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08018—Mode suppression
Abstract
The application relates to the technical field of optical fibers, in particular to a coiling device for filtering stray light in an optical fiber and a stray light filtering method. By sequentially coiling the optical fiber along the first winding position, the arc-shaped surface and the second winding position, or sequentially coiling along the second winding position, the arc-shaped surface and the first winding position, when the optical fiber enters the arc-shaped surface from the first winding position, the throwing-out direction of stray light in a high-order mode is changed, the stray light is thrown out along the X1 and Y1 axis directions, and the stray light can be thrown out along the transmission direction of the Y1 axis; when the optical fiber enters the arc-shaped surface from the second winding position, the throwing-out direction of the stray light in the high-order mode is also changed, the stray light is thrown out along the X2 and Y2 axis directions, the stray light can also be thrown out along the transmission direction of the Y2 axis, most of the stray light in the high-order mode is thrown out of the optical fiber, and the high-order mode is filtered to obtain the low-order mode.
Description
Technical Field
The invention belongs to the technical field of optical fibers, and particularly relates to a coiling device for filtering stray light in an optical fiber and a stray light filtering method.
Background
The superior beam quality of fiber lasers depends on the fiber winding diameter, in addition to benefiting from the superior waveguide structure of the fiber itself. Within a certain range, a minimum coiling diameter exists, so that bending loss can be avoided, a high-order mode can be effectively filtered, and the quality of a light beam is optimized to the maximum extent. Meanwhile, the minimum optical fiber coiling diameter can effectively improve the pump utilization rate of the optical fiber, so that the efficiency of the optical fiber laser is improved, and the power consumption is reduced.
At present, the traditional optical fiber coiling mode is plane coiling, namely all optical fibers are in the same plane, and the stray light throwing-out direction in a high-order mode is limited to be single by the coiling mode, so that the stray light filtering effect is poor.
Disclosure of Invention
An object of the embodiments of the present application is to provide a coiling device for filtering stray light in an optical fiber and a method for filtering stray light, which aim to solve the problem of a high-order mode existing in the optical fiber.
In order to achieve the purpose, the technical scheme adopted by the application is as follows: a coiling device for filtering stray light in an optical fiber is provided, which is used for coiling the optical fiber and comprises:
the optical fiber winding and positioning device comprises a main body structure, wherein optical fiber winding and positioning structures which are arranged on different planes are arranged on the main body structure, the optical fiber winding and positioning structures comprise first winding positions which are vertically arranged on the main body structure and second winding positions which are transversely arranged on the main body structure, and the second winding positions are perpendicular to the first winding positions; and the main body structure is provided with an arc-shaped surface, and the arc-shaped surface is transited between the second winding position and the first winding position.
In one embodiment, the body structure includes a riser, an arc, and a cross plate; the vertical plate, the arc-shaped plate and the transverse plate are spliced in sequence; the first winding position is located on the vertical plate; the arc-shaped surface is positioned on the arc-shaped plate; the second winding position is located on the transverse plate.
In one embodiment, the main body structure comprises a vertical part, an arc part and a transverse part which are integrally formed and connected in sequence; the first winding position is positioned on the vertical part; the arc-shaped surface is positioned on the arc-shaped part; the second winding position is located on the transverse portion.
In one embodiment, the first winding position and the second winding position include a plurality of winding columns, the plurality of winding columns are inserted into the main body structure, the plurality of winding columns are concentrically arranged in a plurality of circles, and each circle of winding column is semicircular.
In one embodiment, the first winding position and the second winding position comprise a plurality of circles of notches which are concentrically arranged, and each circle of notches is semicircular.
In one embodiment, the optical fiber coil positioning structure is a plurality of optical fiber coil positioning structures, and the optical fiber coil positioning structures are arranged on the main body structure at intervals; the optical fiber winding device is characterized in that the main body structure is provided with a supply for the optical fiber winding structure to transition from a higher level to a lower level, one end of the guide structure is connected with the higher level, the first winding position is connected with the other end of the guide structure, the second winding position is connected with the other end of the guide structure, or one end of the guide structure is connected with the higher level, the second winding position is connected with the other end of the guide structure, and the first winding position is connected with the other end of the guide structure.
In one embodiment, the main body structure has a lead-in end and a lead-out end, the lead-in end is provided with a first mounting bracket, the first mounting bracket is slidably and adjustably connected to the lead-in end, and the optical fiber armor is mounted on the first mounting bracket; the leading-out end is provided with a second mounting frame, the second mounting frame is connected with the leading-out end in a sliding and adjusting mode, and the second mounting frame is provided with the fiber grating sensor inserted into the tail end of the optical fiber.
In one embodiment, a leading-out structure for leading the tail end of the optical fiber out of the main structure is arranged on the main structure close to a leading-out end, one end of the leading-out structure is connected with the first winding position or the second winding position, and the other end of the leading-out structure is connected with the leading-out end and is opposite to the insertion end of the fiber bragg grating sensor.
A stray light filtering method comprises the following steps:
s1: the optical fiber is coiled for half a turn along the first winding position of the inner ring or the second winding position of the inner ring; then the optical fiber enters the arc-shaped surface and is tightly attached to the arc-shaped surface, and after passing through the arc-shaped surface, the optical fiber enters the first winding position of the inner ring at the same level or the second winding position of the inner ring at the same level and is coiled for a half circle; then, the optical fiber enters the arc-shaped surface and is tightly attached to the arc-shaped surface, and after passing through the arc-shaped surface, the optical fiber enters the first winding position of the outer ring at the same level or the second winding position of the outer ring at the same level, so that the optical fiber is wound for one circle;
s2: repeating the action of S1 until the first winding and the second winding of the same level are completed;
an X1 axis is defined by the length direction of the vertical plate or the vertical part, and a Y1 axis is defined by the height direction of the vertical plate or the vertical part;
an X2 axis is defined by the length direction of the cross plate or the lateral portion, and a Y2 axis is defined by the width direction of the cross plate or the lateral portion;
when the optical fiber enters the first winding position, stray light in a high-order mode of the optical fiber is thrown out along the directions of an X1 axis and a Y1 axis; when the optical fiber enters the arc surface from the first winding position, the throwing-out direction of stray light in the high-order mode is changed, the stray light is thrown out along the X1 and Y1 axial directions, and the stray light is also thrown out along the transmission direction of the Y1 axis;
when the optical fiber enters the second winding position, stray light in a high-order mode of the optical fiber is thrown out along the directions of an X2 axis and a Y2 axis; when the optical fiber enters the arc-shaped surface from the second winding position, the throwing-out direction of stray light in the high-order mode is changed, the stray light is thrown out along the directions of the X2 and Y2 axes, and the stray light can be thrown out along the transmission direction of the Y2 axis, so that most of the stray light is thrown out of the optical fiber, and the high-order mode is filtered to obtain the low-order mode.
In one embodiment, the method further comprises the following steps:
s3: the optical fiber enters the optical fiber coil positioning structure at the lower stage along the guiding structure, then the actions of S1 and S2 are repeated, the optical fiber coil positioning structures are sequentially coiled, and finally, the tail end of the optical fiber extends out of the main structure along the guiding structure.
The beneficial effect of this application lies in: by sequentially coiling the optical fiber along the first winding position, the arc-shaped surface and the second winding position, or sequentially coiling along the second winding position, the arc-shaped surface and the first winding position, when the optical fiber enters the arc-shaped surface from the first winding position, the throwing-out direction of stray light in a high-order mode is changed, the stray light is thrown out along the X1 and Y1 axis directions, and the stray light can be thrown out along the transmission direction of the Y1 axis; when the optical fiber enters the arc-shaped surface from the second winding position, the throwing-out direction of the stray light in the high-order mode is also changed, the stray light is thrown out along the X2 and Y2 axis directions, the stray light can also be thrown out along the transmission direction of the Y2 axis, most of the stray light in the high-order mode is thrown out of the optical fiber, and the high-order mode is filtered to obtain the low-order mode.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a perspective view of a first embodiment provided by an embodiment of the present application;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is another perspective view of the first embodiment provided by the embodiments of the present application;
FIG. 4 is a schematic diagram illustrating the winding of optical fibers according to a first embodiment of the present application;
fig. 5 is a perspective view of a second embodiment provided in the embodiments of the present application.
Wherein, in the figures, the respective reference numerals:
10. main structure 101, arc surface
102. Lead-in terminal 103 and lead-out terminal
11. Vertical plate 12 and arc plate
13. Horizontal plate 14, vertical part
15. Arcuate portion 16, transverse portion
20. Optical fiber coil winding structure 21, first winding position
22. Second winding position 201, winding column
202. Notch 30, guide structure (lead-out groove)
40. First and second mounting brackets 50 and 50
60. Lead-out structure (lead-out groove) 61, arc section
62. A straight line segment.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 4, a first embodiment of the present application provides a coiling device for filtering stray light in an optical fiber, which is used for coiling the optical fiber 1, wherein the optical fiber 1 is composed of three layers, an inner layer is a central high refractive index glass core layer, an intermediate layer is a low refractive index silica glass cladding layer, and an outer layer is a resin coating layer. The material of the low refractive index silica glass cladding is generally pure silica, and is also doped with trace boron trioxide, and the doping function is to reduce the light refractive index of the material. The resin coating is used to protect the optical fiber from external damage and to increase the mechanical strength of the optical fiber.
Coiling device for filtering stray light in optical fiber, comprising: the optical fiber coil comprises a main body structure 10, wherein an optical fiber coil positioning structure 20 which is arranged on a non-same plane is arranged on the main body structure 10, the optical fiber coil positioning structure 20 comprises a first coil position 21 which is vertically arranged on the main body structure 10 and a second coil position 22 which is transversely arranged on the main body structure 10, and the second coil position 22 is perpendicular to the first coil position 21. The main structure 10 has an arc surface 101, and the arc surface 101 is transited between the second winding position 22 and the first winding position 21. Of course, the optical fiber winding positioning structure 20 is not limited to the second winding position 22 and the first winding position 21, and the winding positions may be arranged on the arc-shaped surface 101. The optical fiber 1 is wound on different planes, so that stray light of a medium-high order mode of the optical fiber 1 leaks out on different planes, and the quality of light beams in the optical fiber 1 is improved.
As shown in fig. 1-4, in one embodiment, the main body structure 10 is a split-type splicing structure, and the main body structure 10 includes a vertical plate 11, an arc-shaped plate 12 and a transverse plate 13; the vertical plate 11, the arc-shaped plate 12 and the transverse plate 13 are sequentially spliced, and the splicing structure comprises a screw lock catch, a buckle connection and the like; the first winding position 21 is positioned on the vertical plate 11; the arc-shaped surface 101 is positioned on the arc-shaped plate 12; the second winding position 22 is located on the transverse plate 13. The split type splicing structure is more convenient to process, and the processing cost is reduced.
In one embodiment, the first winding position 21 and the second winding position 22 include a plurality of winding columns 201, the plurality of winding columns 201 are inserted into the main structure 10, the plurality of winding columns 201 are concentrically arranged in a plurality of circles, and each circle of winding columns 201 is semicircular.
In one embodiment, the optical fiber coil positioning structure 20 is plural, and in the example of the present application, the optical fiber coil positioning structure 20 is four. A plurality of optical fiber coil positioning structures 20 are arranged on the main body structure 10 at intervals. The main structure 10 is provided with a guide structure 30 for the optical fiber 1 to transition from the upper optical fiber coil positioning structure 20 to the lower optical fiber coil positioning structure 20 for the adjacent optical fiber coil positioning structure 20, one end of the guide structure 30 is connected with the upper first winding position 21, the other end is connected with the lower second winding position 22, or one end of the guide structure 30 is connected with the upper second winding position 22, and the other end is connected with the lower first winding position 21. Alternatively, the guiding structure 30 is a guiding groove 30, and after the optical fiber 1 is coiled in one optical fiber coiling position structure 20, the optical fiber 1 enters the next optical fiber coiling position structure 20 along the guiding groove 30, so that the optical fiber 1 enters the next optical fiber coiling position structure 20 at a predetermined angle and position, and the whole optical fiber 1 is coiled in a better order. And the guide groove passes through the arc-shaped surface 101, so that the optical fiber 1 is well attached to the arc-shaped surface. Of course, the guiding structure 30 is not limited to the guiding groove 30, and may be a snap-in type, for example.
In one embodiment, the main body structure 10 has a leading end 102 and a leading end 103, the leading end 102 is provided with a first mounting bracket 40, the first mounting bracket 40 is slidably and adjustably connected to the leading end 103, the optical fiber cable harness 2 is mounted on the first mounting bracket 40, and the optical fiber 1 is threaded out of the end of the optical fiber cable harness 2. Through fixing the end of optic fibre armour 2 on first mounting bracket 40, make the leading-in the device of optic fibre 1 more steady, simultaneously, effectively avoid optic fibre armour 2 end to put at will. The leading-out end 103 is provided with a second mounting frame 50, the second mounting frame 50 is slidably and adjustably connected to the leading-out end 103, and the fiber grating sensor 3 is inserted into the tail end of the optical fiber 1 on the second mounting frame 50. Optionally, the second mounting bracket 50 and the first mounting bracket 40 are slidably adjusted by means of a strip-shaped hole and a screw hole, and certainly, the structure of the sliding adjustment is not limited to the way of the strip-shaped hole and the screw hole, and may also be a way of matching a slider with a sliding rail, and the like. On main body structure 10 was located through the mode that second mounting bracket 50 and first mounting bracket 40 are adjustable, effectively avoided optic fibre 1 to coil the problem of short or overlength.
Alternatively, the fiber grating sensor 3 may be a fiber grating strain sensor, a temperature sensor, an acceleration sensor, a displacement sensor, a pressure sensor, a flow sensor, a liquid level sensor, or the like.
In one embodiment, the leading-out structure 60 for leading out the end of the optical fiber 1 from the main structure 10 is disposed on the main structure 10 near the leading-out end 103, one end of the leading-out structure 60 is connected to the first winding position 21 or the second winding position 22, and the other end is connected to the leading-out end 103 and is opposite to the insertion end of the fiber grating sensor 3, so that the end of the optical fiber 1 can be accurately and quickly plugged into the fiber grating sensor 3. Optionally, the lead-out structure 60 is a lead-out groove 60, the lead-out groove 60 includes an arc section 61 and a straight section 62 which are communicated, one end of the arc section 61 is located in the first winding position 21 or the second winding position 22, and the end of the straight section 62 is opposite to the fiber grating sensor 3. Of course, the lead-out structure 60 is not limited to the groove, and may be a snap-in type, for example.
As shown in fig. 5, a second embodiment of the present invention is basically the same as the first embodiment, except that:
the main body structure 10 is an integrally formed structure, and the main body structure 10 comprises a vertical part 14, an arc part 15 and a transverse part 16 which are sequentially and integrally formed and connected; the first winding position 21 is positioned on the vertical part 14; the arc face 101 is located on the arc portion 15; the second winding site 22 is located on the transverse portion 16.
In one embodiment, the first winding position 21 and the second winding position 22 include a plurality of circles of notches 202, the plurality of circles of notches 202 are concentrically arranged, and each circle of notches 202 is semicircular. Of course, the structure of the first winding position 21 and the second winding position 22 is not limited to the way of winding the pillar 201 and the notch 202, and may be a snap fastener or the like provided on the main body structure 10.
The invention also provides a stray light filtering method, which comprises the following steps:
s1: the optical fiber 1 is coiled for half a turn along the first winding position 21 of the inner circle or the second winding position 22 of the inner circle; then the optical fiber 1 enters the arc-shaped surface 101 and clings to the arc-shaped surface 101, and after passing through the arc-shaped surface 101, the optical fiber 1 enters the first winding position 21 of the inner ring at the same level or the second winding position 22 of the inner ring at the same level and is coiled for a half circle; then, the optical fiber 1 enters the arc-shaped surface 101 and is tightly attached to the arc-shaped surface 101, and after passing through the arc-shaped surface 101, the optical fiber 1 enters the first winding position 21 on the outer ring of the same level or the second winding position 22 on the outer ring of the same level, so that one circle of coiling of the optical fiber 1 is completed;
s2: repeating the action of S1 until the first winding 21 and the second winding 22 of the same level are wound; and the first winding position 21 and the second winding position 22 of the inner ring and the outer ring can wind a plurality of turns.
An X1 axis is defined by the length direction of the riser 11 or the vertical portion 14, and a Y1 axis is defined by the height direction of the riser 11 or the vertical portion 14;
an X2 axis is defined by the length direction of the transverse plate 13 or the lateral portion 16, and a Y2 axis is defined by the width direction of the transverse plate 13 or the lateral portion 16;
when the optical fiber 1 enters the first winding position 21, stray light in a high-order mode of the optical fiber 1 is thrown out along the directions of the axes X1 and Y1, where the axes X1 and Y1 may refer to any region between the axes X1 and Y1. When the optical fiber 1 enters the arc-shaped surface 101 from the first winding position 21, the throwing-out direction of stray light in a high-order mode is changed, the stray light is thrown out along the directions of the X1 and the Y1, and the stray light is also thrown out along the transmission direction of the Y1 axis; it is convenient to understand that the transmission direction of the Y1 axis is defined herein as Y1', as shown in fig. 1 and 2.
When the optical fiber 1 enters the second winding 22, stray light in the high-order mode of the optical fiber 1 is thrown out along the X2 and Y2 axes, where the X2 and Y2 axes may refer to any region between the X2 and Y2 axes. When the optical fiber 1 enters the arc-shaped surface 101 from the second winding position 22, the stray light in the high-order mode is thrown out along the X2 and Y2 axes, and the stray light is thrown out along the transmission direction of the Y2 axis, which is convenient to understand, the transmission direction of the Y2 axis is defined as Y2', as shown in fig. 1 and fig. 2, so that most of the stray light is thrown out of the optical fiber 1, and the high-order mode is filtered to obtain the low-order mode.
In one embodiment, the method further comprises the following steps:
s3: the optical fiber 1 enters the lower optical fiber winding positioning structure 20 along the guiding structure 30, and then the actions of S1 and S2 are repeated to wind the plurality of optical fiber winding positioning structures 20 in sequence, and finally, the end of the optical fiber 1 extends out of the main body structure 10 along the guiding structure 60.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A coiling device for filtering stray light in an optical fiber, for coiling the optical fiber (1), comprising:
the optical fiber winding device comprises a main body structure (10), wherein optical fiber winding positions (20) which are arranged on different planes are arranged on the main body structure (10), each optical fiber winding position (20) comprises a first winding position (21) which is vertically arranged on the main body structure (10) and a second winding position (22) which is transversely arranged on the main body structure (10), and the second winding positions (22) are perpendicular to the first winding positions (21); and the main structure (10) is provided with an arc-shaped surface (101), and the arc-shaped surface (101) is transited between the second winding position (22) and the first winding position (21).
2. A coiling device as claimed in claim 1 for filtering stray light from optical fibres, wherein: the main body structure (10) comprises a vertical plate (11), an arc-shaped plate (12) and a transverse plate (13); the vertical plate (11), the arc-shaped plate (12) and the transverse plate (13) are spliced in sequence; the first winding position (21) is positioned on the vertical plate (11); the arc-shaped surface (101) is positioned on the arc-shaped plate (12); the second winding position (22) is located on the transverse plate (13).
3. A coiling device as claimed in claim 1 for filtering stray light from optical fibres, wherein: the main body structure (10) comprises a vertical part (14), an arc part (15) and a transverse part (16) which are integrally formed and connected in sequence; the first winding position (21) is located on the vertical part (14); the arc-shaped surface (101) is positioned on the arc-shaped part (15); the second winding position (22) is located on the transverse portion (16).
4. A coiling device as claimed in claim 1, 2 or 3, characterised in that: the first winding position (21) and the second winding position (22) comprise a plurality of winding columns (201), the winding columns (201) are inserted into the main body structure (10), the winding columns (201) are concentrically arranged in a plurality of circles, and each circle of the winding columns (201) are semicircular.
5. A coiling device as claimed in claim 1, 2 or 3, characterised in that: the first winding position (21) and the second winding position (22) comprise a plurality of circles of notches (202), the notches (202) are concentrically arranged in a plurality of circles, and each circle of notches (202) is semicircular.
6. A coiling device as claimed in claim 4, characterised in that: the optical fiber coiling positions (20) are multiple, and the optical fiber coiling positions (20) are arranged on the main body structure (10) at intervals; the utility model discloses a cable winding device, including main structure (10), optical fiber coil bit architecture (20) are equipped with the confession on main structure (10) for adjacent optical fiber coil bit architecture (20) optical fiber (1) are from higher level optical fiber coil bit architecture (20) transition to subordinate the guide structure (30) of optical fiber coil bit architecture (20), higher level is connected to guide structure (30) one end first around position (21), the other end is connected subordinate the second is around position (22), perhaps, higher level is connected to guide structure (30) one end the second is around position (22), the other end is connected subordinate first around position (21).
7. A coiling device as claimed in claim 1, 2 or 3, characterised in that: the main body structure (10) is provided with a leading-in end (102) and a leading-out end (103), the leading-in end (102) is provided with a first mounting frame (40), the first mounting frame (40) is connected to the leading-in end (103) in a sliding and adjusting mode, and the optical fiber armor cable (2) is mounted on the first mounting frame (40); the leading-out end (103) is provided with a second mounting frame (50), the second mounting frame (50) is connected with the leading-out end (103) in a sliding and adjusting mode, and the second mounting frame (50) is provided with the fiber bragg grating sensor (3) inserted into the tail end of the optical fiber (1).
8. A coiling device as claimed in claim 7 for filtering stray light from optical fibres, wherein: be equipped with on major structure (10) and be close to derivation end (103) will optic fibre (1) end is derived major structure (60) of (10), derivation structure (60) one end is connected first around position (21) or the second is around position (22), and the other end is connected derivation end (103), and with the end of inserting of fiber grating sensor (3) is just right.
9. A stray light filtering method is characterized by comprising the following steps:
s1: -the optical fibre (1) is coiled a half turn along the first winding (21) of the inner turn or the second winding (22) of the inner turn; then the optical fiber (1) enters the arc-shaped surface (101) and is tightly attached to the arc-shaped surface (101), and after passing through the arc-shaped surface (101), the optical fiber (1) enters the first winding position (21) of the inner ring at the same level or the second winding position (22) of the inner ring at the same level and is wound for a half circle; then, the optical fiber (1) enters the arc-shaped surface (101) and is tightly attached to the arc-shaped surface (101), and after passing through the arc-shaped surface (101), the optical fiber (1) enters the first winding position (21) on the outer circle of the same level or the second winding position (22) on the outer circle of the same level, so that one circle of coiling of the optical fiber (1) is completed;
s2: repeating the action of S1 until the first winding (21) and the second winding (22) of the same level are wound;
an X1 axis is defined by the length direction of the vertical plate (11) or the vertical part (14), and a Y1 axis is defined by the height direction of the vertical plate (11) or the vertical part (14);
an X2 axis is defined by the length direction of the cross plate (13) or the lateral part (16), and a Y2 axis is defined by the width direction of the cross plate (13) or the lateral part (16);
when the optical fiber (1) enters the first winding position (21), stray light in a high-order mode of the optical fiber (1) is thrown out along the X1 and Y1 axial directions; when the optical fiber (1) enters the arc-shaped surface (101) from the first winding position (21), the throwing-out direction of stray light in the high-order mode is changed, the stray light is thrown out along the directions of X1 and Y1 axes, and the stray light is also thrown out along the transmission direction of a Y1 axis;
when the optical fiber (1) enters the second winding position (22), stray light in a high-order mode of the optical fiber (1) is thrown out along the X2 and Y2 axial directions; when the optical fiber (1) enters the arc-shaped surface (101) from the second winding position (22), the throwing-out direction of stray light in the high-order mode is changed, the stray light is thrown out along the X2 and Y2 axis directions, and the stray light can be thrown out along the transmission direction of the Y2 axis, so that most of the stray light is thrown out of the optical fiber (1), and the high-order mode is filtered to obtain the low-order mode.
10. A method for filtering out stray light according to claim 9, further comprising the steps of:
s3: the optical fiber (1) enters the optical fiber coil positioning structure (20) at the lower stage along the guide structure (30), then the actions of S1 and S2 are repeated, a plurality of optical fiber coil positioning structures (20) are sequentially coiled, and finally, the tail end of the optical fiber (1) extends out of the main body structure (10) along the guide structure (60).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110591815.1A CN113300199B (en) | 2021-05-28 | 2021-05-28 | Coiling device for filtering stray light in optical fiber and stray light filtering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110591815.1A CN113300199B (en) | 2021-05-28 | 2021-05-28 | Coiling device for filtering stray light in optical fiber and stray light filtering method |
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| US6496301B1 (en) * | 2000-03-10 | 2002-12-17 | The United States Of America As Represented By The Secretary Of The Navy | Helical fiber amplifier |
| US20070036505A1 (en) * | 2003-09-25 | 2007-02-15 | Martin Seifert | Apparatus and methods for accommodating loops of optical fiber |
| CN106711746A (en) * | 2017-01-09 | 2017-05-24 | 山东海富光子科技股份有限公司 | Optical fiber coiling device applied to high-power optical fiber laser |
| CN109038193A (en) * | 2018-09-07 | 2018-12-18 | 广东国志激光技术有限公司 | A kind of optical fiber self-retaining coiling apparatus and the method using the device coiled fiber |
| CN208782225U (en) * | 2018-09-07 | 2019-04-23 | 广东国志激光技术有限公司 | A kind of optical fiber self-retaining coiling apparatus |
| CN110416864A (en) * | 2019-07-05 | 2019-11-05 | 深圳联品激光技术有限公司 | Fiber optic disc around matrix, fiber optic disc around component and optical fiber laser |
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| US6496301B1 (en) * | 2000-03-10 | 2002-12-17 | The United States Of America As Represented By The Secretary Of The Navy | Helical fiber amplifier |
| US20070036505A1 (en) * | 2003-09-25 | 2007-02-15 | Martin Seifert | Apparatus and methods for accommodating loops of optical fiber |
| CN106711746A (en) * | 2017-01-09 | 2017-05-24 | 山东海富光子科技股份有限公司 | Optical fiber coiling device applied to high-power optical fiber laser |
| CN109038193A (en) * | 2018-09-07 | 2018-12-18 | 广东国志激光技术有限公司 | A kind of optical fiber self-retaining coiling apparatus and the method using the device coiled fiber |
| CN208782225U (en) * | 2018-09-07 | 2019-04-23 | 广东国志激光技术有限公司 | A kind of optical fiber self-retaining coiling apparatus |
| CN110416864A (en) * | 2019-07-05 | 2019-11-05 | 深圳联品激光技术有限公司 | Fiber optic disc around matrix, fiber optic disc around component and optical fiber laser |
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