CN115308843B - Reducing isolator and gyroscope - Google Patents
Reducing isolator and gyroscope Download PDFInfo
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- CN115308843B CN115308843B CN202210938566.3A CN202210938566A CN115308843B CN 115308843 B CN115308843 B CN 115308843B CN 202210938566 A CN202210938566 A CN 202210938566A CN 115308843 B CN115308843 B CN 115308843B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2746—Optical coupling means with polarisation selective and adjusting means comprising non-reciprocal devices, e.g. isolators, FRM, circulators, quasi-isolators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/58—Turn-sensitive devices without moving masses
- G01C19/64—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
- G01C19/72—Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
- G01C19/721—Details
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2551—Splicing of light guides, e.g. by fusion or bonding using thermal methods, e.g. fusion welding by arc discharge, laser beam, plasma torch
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
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- Optics & Photonics (AREA)
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- Plasma & Fusion (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Couplings Of Light Guides (AREA)
- Gyroscopes (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The application relates to a reducing isolator and a gyroscope, which comprise a first tail fiber assembly, a first collimating lens, an isolation core, a second collimating lens and a second tail fiber assembly, wherein the first collimating lens and the second collimating lens are respectively arranged at two sides of the isolation core, and the first tail fiber assembly is arranged at one side of the first collimating lens far away from the isolation core; the first tail fiber component comprises first capillary glass and first optical fibers fixed with the first glass capillary, the second tail fiber component comprises second capillary glass and second optical fibers fixed with the second capillary glass, the first optical fibers and the second optical fibers form signal coupling through a first collimating lens, an isolating core and a second collimating lens, and the diameters of the first optical fibers and the second optical fibers are different. The optical fiber fusion splicing device has the advantages that optical fibers with different diameters can be fused, fusion splicing loss is reduced, fusion splicing strength is improved, and optical signal transmission performance among the optical fibers with different diameters is improved.
Description
Technical Field
The application relates to the technical field of optical fiber communication, in particular to a reducing isolator and a gyroscope.
Background
The diameter-variable isolator is one of the main components of fiber optic gyro and its working principle is to utilize Faraday magneto-optical effect to prevent backward reflected light and scattered light from reaching photosensitive device and to only allow forward transmission of optical signal along optical path.
In recent years, with the rapid development of the fiber optic gyroscope market, the volume of the fiber optic gyroscope is smaller and smaller, and the volume of the fiber optic gyroscope can be reduced by reducing the diameter of the fiber, so that the bending radius of the fiber is reduced, and the volume of the fiber optic winding ring is further reduced. However, the diameter of the erbium-doped fiber (EDF) of the ASE light source in the industry is only 125um, so that the diameter of the fiber at the welding position of the output end of the ASE light source and the coupler is different.
Aiming at the related technology, optical fibers with different diameters are welded together, the welding strength is low, the bending resistance is poor when the optical fibers are wound around a ring, and the transmission performance of optical signals among the optical fibers with different diameters cannot be guaranteed.
Disclosure of Invention
In order to weld optical fibers with different diameters together and improve the transmission performance of optical fiber signals at a welding point, the application provides a reducing isolator and a gyroscope.
The application provides a reducing isolator and gyroscope adopts following technical scheme:
the reducing isolator comprises a first tail fiber assembly, a first collimating lens, an isolating core, a second collimating lens and a second tail fiber assembly, wherein the first collimating lens and the second collimating lens are respectively arranged at two sides of the isolating core, and the first tail fiber assembly is arranged at one side of the first collimating lens far away from the isolating core; the first tail fiber component comprises first capillary glass and first optical fibers fixed with the first glass capillary, the second tail fiber component comprises second capillary glass and second optical fibers fixed with the second capillary glass, the first optical fibers and the second optical fibers form signal coupling through a first collimating lens, an isolating core and a second collimating lens, and the diameters of the first optical fibers and the second optical fibers are different.
By adopting the technical scheme, the first collimating lens is arranged on one side of the isolation core, the second collimating lens is arranged on the other side of the isolation core, the distance between the first collimating lens and the second collimating lens is equal to the distance between the first collimating lens and the isolation core, the first tail fiber component is arranged on one side of the first collimating lens far away from the isolation core, the interval distance between the first tail fiber component and the first collimating lens is a constant value, the first tail fiber component further comprises a first glass capillary and a first optical fiber, and the first optical fiber is nested in the first glass capillary; the second tail fiber assembly is arranged on one side of the second collimating lens, far away from the isolation core, the spacing distance between the second tail fiber assembly and the second collimating lens is a constant value and is equal to the spacing distance between the first tail fiber assembly and the first collimating lens, the second tail fiber assembly further comprises a second glass capillary tube and a second optical fiber, and the second optical fiber is nested in the second glass capillary tube; the optical signal coupling can be formed through the first optical fiber, the first collimating lens, the isolating core, the second collimating lens and the second optical fiber, the first optical fiber and the second optical fiber can be arranged into optical fibers with different diameters, and the optical fibers with different diameters can be connected with the input end and the output end of the reducing isolator, so that the technical effects of reducing welding loss, improving welding strength and reducing welding difficulty are achieved.
Preferably, the diameter of the first optical fiber is 125 micrometers, and the diameter of the second optical fiber is 80 micrometers.
By adopting the technical scheme, the diameter of the first optical fiber can be set to 125 micrometers, the diameter of the second optical fiber can be set to 80 micrometers, the diameter of the first optical fiber can be set to 80 micrometers, and the diameter of the second light is set to 125 micrometers.
Preferably, the reducing isolator further comprises a first pipe body and a second pipe body connected with two opposite end surfaces of the first pipe body, wherein the first collimating lens, the isolating core and the second collimating lens are respectively fixed with the first pipe body; the first tail fiber component is fixed with one second tube body, and the second tail fiber component is fixed with the other second tube body.
Through adopting above-mentioned technical scheme, the packaging structure of reducing isolator still includes first body and two second body, and two second body are fixed respectively at the both ends of first body, and two terminal surfaces of first body laminate mutually with the terminal surface of two second body respectively, and first collimating lens, isolation core, second collimating lens are fixed respectively in the inside of first body, and first pigtail subassembly and second pigtail subassembly are fixed respectively to two second body.
Preferably, the first tube body is a cylindrical glass tube.
By adopting the technical scheme, the shape of the first pipe body is set to be cylindrical.
Preferably, the first pipe body comprises a first pipe part and a second pipe part, and the first pipe part is fixedly connected with the second pipe part to form a cylindrical pipeline.
By adopting the technical scheme, the first pipe body is divided into the first pipe part and the second pipe part, and the end faces of the first pipe part and the second pipe part can be fixedly connected into a cylindrical glass pipeline.
Preferably, the cross sections of the first pipe part and the second pipe part are semicircular.
By adopting the technical scheme, the cross sections of the first pipe part and the second pipe part are arranged in a semicircular shape.
Preferably, the first pipe portion and the second pipe portion are arc-shaped pipes respectively, an arc center angle of the first pipe portion is larger than an arc center angle of the second pipe portion, and surfaces of the first pipe portion and the second pipe portion matched with each other are inclined surfaces.
By adopting the technical scheme, the first pipe part and the second pipe part are respectively arranged into arc-shaped pipes which can be attached to each other, the arc core angle of the first pipe part is larger than that of the second pipe part, and the surface of the joint of the first pipe part and the second pipe part is arranged into an inclined surface.
Preferably, the first pipe portion is provided with a convex shape, the middle portion of the first pipe portion is provided with a circular pipe in a one-piece shape, and two ends of the first pipe portion are provided with semicircular pipes.
Through adopting above-mentioned technical scheme, set up first pipe portion into protruding style of calligraphy, the intermediate zone of first pipe portion sets up to the glass pipe of bodily form, and the both sides of integrative glass pipe set up to the semicircle pipe, can be used to form cylindrical pipeline with the laminating of second pipe portion, through designing first pipe portion into protruding style of calligraphy, reduced the degree of difficulty of equipment.
Preferably, the inner part of the first tube part is positioned at one side of the semicircle tube and is arranged in three clamping grooves, and the three clamping grooves are respectively used for positioning the first collimating lens, the isolating core and the second collimating lens.
Through adopting above-mentioned technical scheme, be provided with three draw-in groove in the inside of first pipe portion, the position of three draw-in groove corresponds location respectively and installs first collimating lens, keeps apart core and second collimating lens, and the shape of three draw-in groove is the same with the fixed part shape of first collimating lens, keeps apart core and second collimating lens respectively, adopts to set up the draw-in groove that is used for location installation first collimating lens, keeps apart core and second collimating lens respectively on the first pipe portion, has improved the accuracy of each part installation.
Preferably, the first pipe body further comprises a first branch pipe, a second branch pipe and a third branch pipe, two ends of the second branch pipe are connected with one ends of the first branch pipe and one end of the third branch pipe respectively through threads, the first collimating lens and the first tail fiber component are arranged in the first branch pipe, the isolating core is arranged in the second branch pipe, and the second collimating lens and the second tail fiber component are arranged in the third branch pipe.
By adopting the technical scheme, the first pipe part is divided into the first branch pipe, the second branch pipe and the third branch pipe, the surfaces of the outer glass walls at the two ends of the second branch pipe are provided with threads, nuts are arranged on the inner glass walls at one ends of the first branch pipe and the third branch pipe, the two ends of the second branch pipe are connected with the first branch pipe and one end of the third branch pipe with the nuts through the threads, the technical effect is achieved, the length of the first pipe part is shortened, and the installation of an isolation core is facilitated; secondly, when the diameter of the product is 125-80 or other diameters such as 80-0, only the distance between the second branch pipe and the first branch pipe in a threaded manner is adjusted, or the distance between the second branch pipe and the third branch pipe in a threaded manner is adjusted, so that the aim of adjusting two collimating lenses is fulfilled, the optimal alignment coupling effect is realized, and the requirement of adapting to optical fibers with different diameters can be met without changing collimating lenses with different focal lengths; thirdly, when the alignment coupling is adjusted, the collimating lenses at the two ends and the tail fiber assembly can be ensured to be motionless, and the first branch pipe and the third branch pipe are motionless because the distance adjusted by the second branch pipe is rotated, so that the polarization maintaining degree of the first optical fiber included in the first tail fiber assembly and the polarization maintaining degree of the second optical fiber included in the second tail fiber assembly can be ensured, and the extinction ratio is reduced.
Preferably, the gyroscope comprises an optical fiber ring, a reducing isolator and a coupler, wherein the output end of the optical fiber ring is welded with a first optical fiber, the second optical fiber is welded with the input end of the coupler, the diameter of the optical fiber ring is the same as that of the first optical fiber, the diameter of the second optical fiber is welded with the input end of the coupler, the diameters of the first optical fiber and the second optical fiber of the reducing isolator are different, and the optical fiber ring with the same diameter is welded with the coupler, so that the optical signal transmission performance among optical fibers with different diameters is improved.
Through adopting above-mentioned technical scheme, a gyroscope comprises fiber ring, reducing isolator and coupler, and wherein the output of fiber ring welds with the input of first optic fibre, and the output of second optic fibre welds with the input of coupler, and the diameter of fiber ring is the same with the diameter of first optic fibre, and the diameter of second optic fibre is the same with the diameter of coupler.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the input end and the output end of the variable-diameter isolator can be respectively welded with optical fibers with the same diameter as the optical fibers, so that welding loss is reduced, welding strength is improved, and welding difficulty is reduced;
2. by the design of arranging the clamping groove in the first pipe part, the assembling difficulty is reduced, and the mounting accuracy of each part is improved;
3. through setting up first pipe portion into first branch pipe, second branch pipe, third branch pipe, made things convenient for the installation of isolation core, through adjusting the spiro union distance between first branch pipe, third branch pipe respectively and the second branch pipe, can realize the best effect of aiming at the coupling, reached and to need not to change the diameter of different focuses and can match the optic fibre of different diameters, when adjusting aiming at the coupling, can ensure that collimating lens and the pigtail subassembly at both ends are motionless, guaranteed the polarization-preserving degree, reduced extinction ratio.
4. A reducing isolator is arranged between an optical fiber ring and a coupler, so that the output end of the optical fiber ring and the input end of the coupler are welded with optical fibers with the same diameter, and the optical signal transmission performance between the optical fiber ring and the coupler is improved.
Drawings
FIG. 1 is an axial sectional view schematically showing a variable diameter separator of embodiment 1;
fig. 2 is a schematic structural view of a first pipe body of embodiment 2;
FIG. 3 is a schematic cross-sectional view of the first and second pipe sections of example 3;
fig. 4 is a schematic structural view of a first pipe section of embodiment 4;
FIG. 5 is an axial cross-sectional schematic view of the first pipe section of example 5;
fig. 6 is a schematic structural diagram of the first branch pipe, the second branch pipe and the third branch pipe of embodiment 6;
fig. 7 is a schematic structural view of a gyroscope of embodiment 7.
Reference numerals illustrate: 1. a first pigtail assembly; 2. a first collimating lens; 3. an isolation core; 4. a second collimating lens; 5. a second pigtail assembly; 6. a first tube body; 7. a second tube body; 8. a clamping groove; 11. a first capillary glass; 12. a first optical fiber; 31. a first polarizing plate; 32. an optical rotator; 33. a second polarizing plate; 34. a magnetic ring; 51. a second capillary glass; 52. a second optical fiber; 61. a first pipe section; 62. a second pipe section; 63. A first branch pipe; 64. a second branch pipe; 65. a third branch pipe; 100. a gyroscope; 101. an optical fiber ring; 102. a reducing isolator; 103. a coupler.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to fig. 1 to 7 and the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Example 1
Referring to fig. 1, fig. 1 is an axial sectional view of a variable diameter isolator.
Specifically, the reducing isolator 102 includes a first pigtail assembly 1, a first collimating lens 2, an isolating core 3, a second collimating lens 4, a second pigtail assembly 5, a first tube 6, and two second tubes 7.
The first tube body 6 is a hollow cylindrical glass tube, the isolation core 3 is arranged at the center of the first tube body 6, the first collimating lens 2 and the second collimating lens 4 are respectively arranged at two sides of the isolation core 3, and the first collimating lens 2 and the second collimating lens 4 are respectively positioned at opposite ends of the first tube body 6.
The second tube body 7 is a hollow cylindrical glass tube. The first pigtail assembly 1 is fixed with one of the second pipe bodies 7, the second pigtail assembly 5 is fixed with the other second pipe body 7, the first pipe body 6 is provided with two opposite end faces, and the second pipe body 7 is respectively fixed with one end face.
The end face of the second pipe body 7 fixed with the first tail fiber assembly 1 is fixed with one end face of the first pipe body 6, and the end face of the second pipe body 7 fixed with the second tail fiber assembly 5 is fixed with the other end face of the first pipe body 6.
The first pigtail assembly 1 comprises a first capillary glass 11 and a first optical fiber 12 fixed to the first capillary glass 11. The second pigtail assembly 5 comprises a second capillary glass 51 and a second optical fiber 52 fixed with the second capillary glass 51, wherein the first optical fiber 12 is in signal coupling with the second optical fiber 52 through the first collimating lens 2, the isolating core 3 and the second collimating lens 4, and the diameter of the first optical fiber 12 is different from the diameter of the second optical fiber 52. In this embodiment, the first optical fiber 12 and the second optical fiber 52 are polarization maintaining fibers, respectively.
The external diameter of the second pipe body 7 is smaller than the external diameter of the first pipe body 6, the internal diameter of the second pipe body 7 is slightly larger than the internal diameter of the first pipe body 6, one ends of the two second pipe bodies 7 are respectively bonded with two ends of the first pipe body 6 through ultraviolet glue, the thickness of an ultraviolet glue layer at the bonding position of the end faces of the first pipe body 6 and the second pipe body 7 is 2-5 micrometers, the thickness of the ultraviolet glue layer at the connecting position is controlled below 5um, the full-temperature performance of the reducing isolator can be ensured to be excellent, and the temperature-related loss is less than or equal to 0.1dB.
The first collimating lens 2 and the second collimating lens 4 are nested at two ends of the first tube body 6, the focal lengths of the first collimating lens 2 and the second collimating lens 4 are the same, the shapes of the first collimating lens 2 and the second collimating lens 4 are the same, the first collimating lens and the second collimating lens are both cylindrical, one end face of the first collimating lens 2 and the second collimating lens 4 is a slope, the other end face of the first collimating lens is a hemispherical face, one end of the first collimating lens 2 and one end of the second collimating lens 4, which are arranged as hemispherical faces, are inserted into two ports of the first tube body 6, and one end of the first collimating lens 2 and one end of the second collimating lens 4, which are arranged as slopes, are exposed out of the two ports of the first tube body and are positioned in the second tube body 7.
The isolation core 3 is a cylinder, the outer diameter of the isolation core 3 is slightly smaller than the inner diameter of the first tube body 6, the isolation core 3 is fixed at the middle position inside the first tube body 6, the distances between the isolation core 3 and the spherical ends of the first collimating lens 2 and the second collimating lens 4 are equal, the isolation core 3 further comprises a first polarizing plate 31, a rotator 32, a second polarizing plate 33 and a magnetic ring 34, the first polarizing plate 31, the rotator 32 and the second polarizing plate 33 are all arranged into cylinders, the magnetic ring 34 is used for wrapping the first polarizing plate 31, the rotator 32 and the second polarizing plate 33, the magnetic ring 34 is arranged into a hollow cylinder, the inner diameter of the magnetic ring 34 is slightly larger than the outer diameters of the first polarizing plate 31, the rotator 32 and the second polarizing plate 33, the rotator 32 is arranged at the center inside the magnetic ring 34, and the first polarizing plate 31 and the second polarizing plate 33 are arranged at two ports inside the magnetic ring 34.
In the forward transmission of the low polarization, the light passes through the first polarizing plate 31 to become linearly polarized light, the polarization direction of the polarized light is rotated 45 degrees to the right after passing through the optical rotatory plate 32, and the optical axis direction of the second polarizing plate 33 is also rotated 45 degrees to the right, so that the linearly polarized light can pass smoothly. In the reverse transmission, the light first enters the second polarizing plate 33 from right to left to become linearly polarized light rotated 45 degrees to the right, and the reflected light is rotated 45 degrees after passing through the optical rotatory plate 32, and the direction of the optical axis of the reflected light is exactly 90 degrees different from that of the first polarizing plate 31, so that the reflected light cannot pass through the first polarizing plate 31, and thus, unidirectional propagation of the light is realized.
The first tail fiber assembly 1 comprises a first capillary glass 11 and a first optical fiber 12, the diameter of the adopted first optical fiber 12 is 125 microns, the selected first capillary glass 11 is a hollow cylindrical glass tube, the inner diameter of the first capillary glass 11 is slightly larger than 125 microns, the first capillary glass can be used for welding the first optical fiber 12, the outer diameter of the first capillary glass 11 is slightly smaller than the inner diameter of the second tube 7, the output end of the first capillary glass 11 is nested in the second tube 7 and can be fixed through ultraviolet glue, the output end face of the first capillary glass 11 is set to be an inclined plane, the inclined plane of the output end of the first capillary glass 11 is parallel to the inclined plane of the first collimating lens 2, and the central area of the end face of the input end of the first capillary glass 11 is a hollowed hemispherical body, so that the first optical fiber 12 can be conveniently inserted.
The second tail fiber assembly 5 comprises a second capillary glass 51 and a second optical fiber 52, the diameter of the adopted second optical fiber 52 is 80 microns, the selected second capillary glass 51 is a hollow cylindrical glass tube, the inner diameter of the second capillary glass 51 is slightly larger than 80 microns and can be used for welding the second optical fiber 52, the outer diameter of the second capillary glass 51 is slightly smaller than the inner diameter of the second tube body 7, the output end of the second capillary glass 51 is nested in the second tube body 7 connected with the second collimating lens 4 and can be fixed through ultraviolet glue, the output end face of the second capillary glass 51 is provided with an inclined face, the inclined face of the output end of the second capillary glass 51 is parallel to the inclined face of the second collimating lens 4, and the central area of the end face of the input end of the second capillary glass 51 is a hollowed hemispherical body and can be conveniently inserted into the second optical fiber 52.
The implementation principle of the variable-diameter isolator in the embodiment of the application is as follows: the first collimating lens 2 and the second collimating lens 4 are respectively arranged at two sides of the isolation core 3, and the first tail fiber assembly 1 is arranged at one side of the first collimating lens 2 far away from the isolation core 3; the first pigtail assembly 1 comprises a first capillary glass 11 and a first optical fiber 12 fixed with the first capillary glass 11, the second pigtail assembly 5 comprises a second capillary glass 51 and a second optical fiber 52 fixed with the second capillary glass 51, the first optical fiber 12 forms signal coupling with the second optical fiber 52 through the first collimating lens 2, the isolating core 3 and the second collimating lens 4, and the diameter of the first optical fiber 12 is different from the diameter of the second optical fiber 52.
According to the embodiment of the application, the first fiber 12 and the second fiber 52 with different diameters are welded with the first fiber tail assembly 1 and the second fiber tail assembly 5 through the reducing isolator 102, so that the purpose of optical signal coupling among fibers with different diameters is achieved, and the optical signal transmission performance among fibers with different diameters is improved.
Through test detection, the temperature loss of the variable diameter isolator 102 provided by the application is less than or equal to 0.1dB, the extinction ratio is more than or equal to 25dB, the temperature-related loss of products in industry is distributed between 0.2 dB and 0.3dB, and the extinction ratio parameter is more than or equal to 20dB.
Example 2
Referring to fig. 2 and 3, fig. 2 is a schematic structural diagram of the first pipe body of embodiment 2, and fig. 3 is a schematic cross-sectional diagram of the first pipe portion and the second pipe portion of embodiment 2.
In the present embodiment, the first tube body 6 includes a first tube portion 61 and a second tube portion 62, and the first tube portion 61 and the second tube portion 62 are semicircular in cross section. That is, after the spacer core 3, the first collimator lens 2, and the second collimator lens 4 are assembled into the first tube 61, the second tube 7 is fixed to the first tube 6.
According to the embodiment of the application, the first tube body 6 is arranged to be the first tube portion 61 and the second tube portion 62 which are formed in a split mode, so that the difficulty of installing the first collimating lens 2, the isolation core 3 and the second collimating lens 4 to the first tube body 6 is reduced, and the assembly efficiency is improved.
Example 3
Referring to fig. 3, fig. 3 is a schematic cross-sectional view of a first pipe portion and a second pipe portion according to embodiment 3.
In comparison with embodiment 2, the difference is that in this embodiment, the first pipe portion 61 and the second pipe portion 62 are arc-shaped pipes, respectively, the arc-center angle of the first pipe portion 61 is larger than that of the second pipe portion 62, and the surfaces of the first pipe portion 61 and the second pipe portion 62 that cooperate with each other are inclined surfaces.
According to the embodiment of the application, the first pipe body 6 comprises the first pipe portion 61 and the second pipe portion 62, the arc center angle of the first pipe portion 61 is larger than that of the second pipe portion 62, the surface of the first pipe portion 61 and the surface of the second pipe portion 62 matched with each other are inclined planes, then the second pipe body 7 and the first pipe body 6 are fixed, ultraviolet glue can be coated on the first inclined planes, the accurate positioning of the second pipe portion 62 can be achieved through the inclined planes of the first pipe portion 61, and the difficulty in assembling and fixing the first pipe portion 61 and the second pipe portion 62 is reduced.
Example 4
Referring to fig. 4, fig. 4 is a schematic structural diagram of a first pipe portion in embodiment 4 of the present application.
The difference is that in this embodiment, the first pipe portion 61 is provided with a convex shape, the middle portion of the first pipe portion (61) is provided with a circular pipe in one body, two ends of the first pipe portion are provided with semicircular pipes, and two second pipe portions 62 are respectively matched with the long hole portions of the first pipe portion 61 to form a cylindrical pipe body.
In the embodiment of the application, the first tube portion 61 is provided with the convex shape, and the two ends of the first tube portion 61 are provided with the long holes capable of being opened, so that the accuracy of assembling and positioning the first collimating lens 2 and the second collimating lens 4 at the two ends of the first tube portion 61 is improved
Example 5
Referring to fig. 5, fig. 5 is an axial cross-sectional view of the first pipe portion of embodiment 5.
The difference is that in the embodiment of the present application, two ends and a middle position in the inner glass tube of the first tube portion 61 are respectively provided with a clamping groove corresponding to the second collimating lens 4 of the first collimating lens 2 and the isolation core 3.
According to the embodiment of the application, the clamping grooves corresponding to the first collimating lens 2, the second collimating lens 4 and the isolation core 3 are respectively arranged at the two ends and the middle position in the inner glass tube of the first tube portion 61, so that the accurate positioning corresponding to the first collimating lens 2, the second collimating lens 4 and the isolation core 3 in the assembling process is realized, the assembling difficulty is reduced, and the assembling efficiency is improved.
Example 6
Referring to fig. 6, fig. 6 is a schematic structural diagram of the first branch pipe, the second branch pipe and the third branch pipe of embodiment 6.
It is different in that, in this embodiment of the present application, the first pipe portion 61 further includes a first branch pipe 63, a second branch pipe 64 and a third branch pipe 65, two ends of the second branch pipe 64 are respectively connected with one ends of the first branch pipe 63 and the third branch pipe 65 through threads, the first collimating lens 2 and the first pigtail assembly 1 are disposed in the first branch pipe 63, the isolating core (3) is disposed in the second branch pipe (64), and the second collimating lens 4 and the second pigtail assembly 5 are disposed in the third branch pipe 65.
The embodiment of the application has the following technical effects that firstly, the first pipe part 61 is arranged into the first branch pipe 63, the second branch pipe 64 and the third branch pipe 65, so that the length of the first glass pipe for installing the isolation core 3 is shortened, and the isolation core 3 is convenient to install; secondly, when the diameter of the product is 125 or 80, or other diameters such as 80 and 60, only the distance between the second branch pipe 64 and the first branch pipe 63 in a threaded manner is adjusted, or the distance between the second branch pipe 64 and the third branch pipe 65 in a threaded manner is adjusted, so that the aim of adjusting two collimating lenses is fulfilled, the optimal alignment coupling effect is realized, and the requirement of adapting to optical fibers with different diameters can be met without changing collimating lenses with different focal lengths; third, when the alignment coupling is adjusted, the alignment lenses at both ends and the pigtail assembly can be ensured to be stationary, because the distance adjusted by rotating the second branch pipe 64 is used, the first branch pipe 63 and the third branch pipe 65 are stationary, so that the polarization maintaining degree of the first optical fiber 12 included in the first pigtail assembly 1 and the second optical fiber 52 included in the second pigtail assembly 5 can be ensured, and the extinction ratio is reduced.
Example 7
Referring to fig. 7, fig. 7 is a schematic structural diagram of a gyroscope according to embodiment 7 of the present application.
Specifically, the gyroscope 100 includes an optical fiber ring 101, a reducing isolator 102, and a coupler 103.
The output end of the optical fiber ring 101 is fused to the first optical fiber 12, the second optical fiber 52 is fused to the input end of the coupler 103, and the diameter of the optical fiber ring 101 is the same as the diameter of the first optical fiber 12, and the diameter of the second optical fiber 52 is the same as the diameter of the coupler 103.
According to the reducing isolator 102 and the gyroscope 100 provided by the embodiment of the application, the optical fibers with the same diameter as the optical fiber ring 101 and the coupler 103 are welded at the two ends of the reducing isolator 102 respectively, so that welding loss is reduced, welding strength is improved, and optical signal transmission performance among the optical fibers with different diameters is improved.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions.
Claims (8)
1. The diameter-variable isolator is characterized by comprising a first tail fiber assembly (1), a first collimating lens (2), an isolation core (3), a second collimating lens (4) and a second tail fiber assembly (5), wherein the first collimating lens (2) and the second collimating lens (4) are respectively arranged at two sides of the isolation core (3), and the first tail fiber assembly (1) is arranged at one side, far away from the isolation core (3), of the first collimating lens (2); the first pigtail assembly (1) comprises a first capillary glass (11) and a first optical fiber (12) fixed with the first capillary glass (11), the second pigtail assembly (5) comprises a second capillary glass (51) and a second optical fiber (52) fixed with the second capillary glass (51), the first optical fiber (12) forms signal coupling with the second optical fiber (52) through a first collimating lens (2), an isolating core (3) and a second collimating lens (4), the diameter of the first optical fiber (12) is different from the diameter of the second optical fiber (52), the reducing isolator further comprises a first pipe body (6) and a second pipe body (7) connected with two end faces of the first pipe body, the first collimating lens (2), the isolating core (3) and the second collimating lens (4) are respectively fixed with the first pipe body (6), the first pigtail assembly (1) is fixed with one second pipe body (7) in the first pigtail assembly, the diameter of the first optical fiber (12) is different from the diameter of the second optical fiber (52), the reducing isolator further comprises a first pipe body (6) and a second pipe body (7) connected with two end faces of the first pipe body (6), two end branches (63) are respectively fixed with the first pipe body (6), two end branches (6) are respectively connected with the second pipe body (6), the two ends of the second branch pipe (64) are respectively connected with one ends of the first branch pipe (63) and the third branch pipe (65) through threads, the first collimating lens (2) and the first tail fiber component (1) are arranged in the first branch pipe (63), the isolating core (3) is arranged in the second branch pipe (64), and the second collimating lens (4) and the second tail fiber component (5) are arranged in the third branch pipe (65).
2. A reducing isolator as claimed in claim 1, wherein: the first optical fiber (12) has a diameter of 125 microns and the second optical fiber (52) has a diameter of 80 microns.
3. A reducing isolator as claimed in claim 1, wherein: the first pipe body (6) is a cylindrical glass pipe.
4. A reducing isolator as claimed in claim 3, wherein: the first pipe body (6) comprises a first pipe portion (61) and a second pipe portion (62), and the first pipe portion (61) and the second pipe portion (62) are fixedly connected to form a cylindrical pipeline.
5. A reducing isolator as claimed in claim 4, wherein: the cross sections of the first pipe part (61) and the second pipe part (62) are semicircular; or the first pipe part (61) and the second pipe part (62) are respectively arc-shaped pipes, the arc center angle of the first pipe part (61) is larger than that of the second pipe part (62), and the surfaces of the first pipe part (61) and the second pipe part (62) matched with each other are inclined surfaces.
6. A reducing isolator as claimed in claim 4, wherein: the first pipe part (61) is arranged in a convex shape, the middle part of the first pipe part (61) is arranged as a one-piece round pipe, and two ends of the first pipe part are arranged as semi-round pipes.
7. A reducing isolator as claimed in claim 4, wherein: the inside of first pipe portion (61) is located one side of semicircle pipe and sets up in three draw-in groove (8), three draw-in groove (8) are used for location first collimating lens (2), isolation core (3), second collimating lens (4) respectively.
8. A gyroscope, comprising an optical fiber ring (101), a reducing isolator (102) and a coupler (103), wherein the reducing isolator (102) is a reducing isolator according to any one of claims 1 to 7, an output end of the optical fiber ring (101) is welded to a first optical fiber (12), a second optical fiber (52) is welded to an input end of the coupler (103), and a diameter of the optical fiber ring (101) is the same as a diameter of the first optical fiber (12), and a diameter of the second optical fiber (52) is the same as a diameter of the coupler (103).
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| CN202210938566.3A CN115308843B (en) | 2022-08-05 | 2022-08-05 | Reducing isolator and gyroscope |
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| CN202210938566.3A CN115308843B (en) | 2022-08-05 | 2022-08-05 | Reducing isolator and gyroscope |
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| CN104317003A (en) * | 2014-07-30 | 2015-01-28 | 徐州旭海光电科技有限公司 | Coaxial light collimator and manufacturing method thereof |
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| US6804435B2 (en) * | 2002-03-21 | 2004-10-12 | Adc Telecommunications, Inc. | Fiber collimator coupling assembly |
| US7016565B2 (en) * | 2003-06-10 | 2006-03-21 | Lightel Technologies Inc. | Micro-optic fiber device |
| CN202075453U (en) * | 2011-04-29 | 2011-12-14 | 福州通产光电技术有限公司 | Wavelength division multiplexer |
| CN106707414B (en) * | 2016-12-26 | 2024-01-19 | 上海毫米星光光学有限公司 | Optical fiber isolator |
| CN108562976B (en) * | 2018-03-31 | 2020-04-24 | 深圳市创鑫激光股份有限公司 | High-power laser coupler and assembling method thereof |
| CN213750403U (en) * | 2020-12-07 | 2021-07-20 | 浙江奥智光电科技有限公司 | Low-loss optical fiber collimator |
| CN214623111U (en) * | 2020-12-25 | 2021-11-05 | 湖南恒凯通信息科技有限公司 | Optical fiber assembly with isolator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104317003A (en) * | 2014-07-30 | 2015-01-28 | 徐州旭海光电科技有限公司 | Coaxial light collimator and manufacturing method thereof |
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