CN212060639U - Single optical fiber waist type microtube optical fiber head - Google Patents
Single optical fiber waist type microtube optical fiber head Download PDFInfo
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- CN212060639U CN212060639U CN202020943099.XU CN202020943099U CN212060639U CN 212060639 U CN212060639 U CN 212060639U CN 202020943099 U CN202020943099 U CN 202020943099U CN 212060639 U CN212060639 U CN 212060639U
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Abstract
The utility model provides a single optical fiber waist-type microtube optical fiber head, which comprises a polarization maintaining optical fiber and a waist-type microtube; the micro-micro tube is characterized in that a first plane, a first cambered surface, a second plane and a second cambered surface are sequentially arranged in the circumferential direction of the kidney-shaped micro-tube, the first plane and the second plane are symmetrically arranged in a back-to-back manner, the first cambered surface and the second cambered surface are symmetrically arranged in a back-to-back manner, the first plane is respectively adjacent to the first cambered surface and the second cambered surface, and the second plane is respectively adjacent to the first cambered surface and the second cambered surface; the waist-shaped microtube is also provided with a first end face and a second end face, and the first end face and the second end face are arranged in an opposite way; the waist-shaped microtube is also provided with a containing cavity, and the polarization-maintaining optical fiber is inserted in the containing cavity and is positioned at the central shaft position of the waist-shaped microtube; the fiber end face and the second end face of the polarization maintaining fiber inserted into the accommodating cavity are positioned on the same plane; the arrangement direction of the cat eyes on the end face of the optical fiber is parallel to the first plane or vertical to the first plane. Use the utility model discloses can improve the polarization maintaining fiber stress degree of consistency, polarization maintaining effect is better.
Description
Technical Field
The utility model relates to an optical fiber communication technical field, it is concrete, relate to a single optical fiber waist type microtube optic fibre head.
Background
The polarization maintaining optical fiber has a stress rod of a bear cat eye and is used for maintaining the transmission of single-polarization light through the optical fiber, so that the single-polarization effect can be well maintained.
Because the polarization maintaining fiber is too thin and is easily brittle, a capillary is required to fix the polarization maintaining fiber and manufacture a fiber head so as to carry out the subsequent grinding of the end face of the fiber and the subsequent matching and fixing with other glass devices (such as lenses).
As shown in fig. 1 and 2, the conventional optical fiber head includes a polarization maintaining optical fiber 1 and a microtube 2, and the polarization maintaining optical fiber 1 is inserted into the microtube 2. From the end surface 21 of the microtube 2, the microtube 2 is a cylinder and is centrosymmetric, while from the end surface 11 of the polarization maintaining fiber 1, the polarization maintaining fiber 1 is not completely symmetric, and the cat eye 111 of the polarization maintaining fiber 1 is linearly symmetric, so that the stress applied to the polarization maintaining fiber 1 by the microtube 2 is not uniform, and mismatch occurs, which results in the polarization maintaining effect of the polarization maintaining fiber 1 being reduced.
Disclosure of Invention
The utility model aims at providing an improve the stress degree of consistency that polarization maintaining optical fiber receives, polarization keeps the better single optical fiber waist type microtube optic fibre head of effect.
In order to achieve the purpose, the utility model provides a polarization maintaining optical fiber and a waist-shaped microtube; the micro-micro tube is characterized in that a first plane, a first cambered surface, a second plane and a second cambered surface are sequentially arranged in the circumferential direction of the kidney-shaped micro-tube, the first plane and the second plane are symmetrically arranged in a back-to-back manner, the first cambered surface and the second cambered surface are symmetrically arranged in a back-to-back manner, the first plane is respectively adjacent to the first cambered surface and the second cambered surface, and the second plane is respectively adjacent to the first cambered surface and the second cambered surface; the waist-shaped microtube is also provided with a first end face and a second end face, and the first end face and the second end face are arranged in an opposite way; the waist-shaped microtube is also provided with an accommodating cavity penetrating through the first end face and the second end face, and the polarization maintaining optical fiber is inserted in the accommodating cavity and is positioned at the central shaft position of the waist-shaped microtube; the fiber end face and the second end face of the polarization maintaining fiber inserted into the accommodating cavity are positioned on the same plane; the arrangement direction of the cat eyes on the end face of the optical fiber is parallel to the first plane or vertical to the first plane.
According to the above technical scheme, the utility model discloses a single optical fiber waist type microtube optical fiber head is through the waist type microtube cartridge polarization-maintaining optical fiber who utilizes linear symmetry, with the linear symmetry phase-match of the cat eye of polarization-maintaining optical fiber for polarization-maintaining optical fiber receives stress more even, thereby improves polarization and keeps the effect.
In a further aspect, on the same cross-section of the kidney-shaped microtube, a shortest distance of the first plane from a center of the cross-section is one fifth less than a distance of the first arc surface from the center of the cross-section.
Therefore, when the shortest distance between the first plane and the center of the cross section is less than one fifth of the distance between the first cambered surface and the center of the cross section, the stress uniformity of the polarization-maintaining optical fiber is optimal.
In the further scheme, hold the chamber and include that first chamber and the second of holding hold the chamber, first chamber and the second of holding holds the chamber and is linked together, and first chamber that holds is provided with the opening at first terminal surface, and the internal diameter in first chamber that holds is held the chamber direction by the opening to the second and is reduced gradually.
Therefore, the inner diameter of the first accommodating cavity is gradually reduced from the opening to the second accommodating cavity, so that the optical fiber is easier to insert into the accommodating cavity when the polarization maintaining optical fiber is installed.
In a further scheme, the polarization maintaining optical fiber comprises a bare fiber part, and the bare fiber part is inserted in the second accommodating cavity.
Therefore, the bare fiber part of the polarization maintaining optical fiber inserted into the second accommodating cavity can reduce the influence of the sheath of the polarization maintaining optical fiber on the stress of the optical fiber and improve the uniformity of the stress.
In a further scheme, the part of the polarization maintaining fiber, which is positioned in the second accommodating cavity, is fixed with the waist-shaped microtube through fiber optic guide glue; the part of the polarization maintaining optical fiber, which is positioned in the first accommodating cavity, is fixed with the waist-shaped microtube through ultraviolet curing glue.
Therefore, the part of the polarization maintaining optical fiber, which is positioned in the second accommodating cavity, is fixed with the waist-shaped micro-tube through the optical fiber light guide glue, so that the waist-shaped micro-tube can be bonded more easily by the bare fiber part, and the part of the polarization maintaining optical fiber, which is positioned in the first accommodating cavity, is fixed with the waist-shaped micro-tube through the ultraviolet curing glue, so that the rapid optical hardening glue can be conveniently used, and the optical fiber can be rapidly fixed.
In a further scheme, the part of the polarization maintaining optical fiber, which is exposed out of the waist-shaped microtube and close to the first end face, is fixed with the waist-shaped microtube through soft glue.
Therefore, the part of the polarization maintaining optical fiber exposed out of the waist-shaped microtube and close to the first end face is fixed with the waist-shaped microtube through the soft glue, so that the optical fiber is protected from being easily broken.
In a further scheme, the first end face is perpendicular to the first plane, and the second end face is parallel to the first end face.
In a further scheme, the first end face is perpendicular to the first plane, the second end face is inclined at an angle of 8 degrees relative to the first end face, and the second end face is inclined from the first plane to the second plane.
Therefore, the angle of the second end face can be set according to needs.
In a further scheme, the end face of the optical fiber is a coated end face.
In a further scheme, the transmission wavelength of the end face of the coating film is 900nm to 1100 nm; or the transmission wavelength of the end face of the coating film is 1250nm to 1650 nm.
Therefore, the end face of the optical fiber is coated with the film, the passing rate of the corresponding wavelength can be guaranteed, and the optical fiber is filtered.
Drawings
Fig. 1 is a structural view of a conventional optical fiber head.
Fig. 2 is a structural view of an end face of a conventional optical fiber head.
FIG. 3 is a schematic diagram of a first embodiment of a single fiber waist type micro-capillary fiber tip according to the present invention.
FIG. 4 is a cross-sectional view of a first embodiment of a single fiber waist-type micro-capillary fiber tip according to the present invention.
FIG. 5 is a schematic diagram of a capillary in a first embodiment of a single fiber waist type micro-capillary fiber tip according to the present invention.
FIG. 6 is a cross-sectional view of a capillary tube in a first embodiment of a single fiber waist-type micro-capillary fiber tip according to the present invention.
FIG. 7 is a schematic diagram of an end face of a first embodiment of a single fiber waist type micro-capillary fiber tip according to the present invention.
FIG. 8 is a schematic diagram of a second embodiment of a single fiber waist type micro-capillary fiber tip according to the present invention.
FIG. 9 is a cross-sectional view of a single fiber waist type micro-capillary fiber tip according to a third embodiment of the present invention.
The present invention will be further explained with reference to the drawings and examples.
Detailed Description
First embodiment of single-fiber waist-type microtube fiber tip:
as shown in fig. 3 and 4, the single optical fiber waist-type micro-tube optical fiber head of the present invention includes a polarization maintaining optical fiber 3 and a waist-type micro-tube 4, wherein the polarization maintaining optical fiber 3 is inserted into the waist-type micro-tube 4.
Referring to fig. 5 and 6, the kidney-shaped microtube 4 is provided with a first end surface 41 and a second end surface 42, and the first end surface 41 and the second end surface 42 are arranged oppositely. The first plane 43, the first cambered surface 44, the second plane 45 and the second cambered surface 46 are sequentially arranged in the circumferential direction of the kidney-shaped microtube 4, the first plane 43 and the second plane 45 are symmetrically arranged in a back-to-back manner, the first cambered surface 44 and the second cambered surface 46 are symmetrically arranged in a back-to-back manner, the first plane 43 is respectively adjacent to the first cambered surface 44 and the second cambered surface 46, and the second plane 45 is respectively adjacent to the first cambered surface 44 and the second cambered surface 46. The first end face 41 is disposed perpendicular to the first plane 43, and the second end face 42 is parallel to the first end face 41. Referring to fig. 7, on the same cross-section of the kidney-shaped microtube 4, the shortest distance d of the first plane 43 from the center of the cross-section is one fifth smaller than the distance r of the first cambered surface 44 from the center of the cross-section, i.e. d equals four fifths of r.
The waist-shaped microtube 4 is further provided with a containing cavity penetrating through the first end face 41 and the second end face 42, and the polarization-maintaining optical fiber 3 is inserted into the containing cavity and is positioned at the central axis position of the waist-shaped microtube 4. In this embodiment, the accommodating cavities include a first accommodating cavity 47 and a second accommodating cavity 48, the first accommodating cavity 47 is communicated with the second accommodating cavity 48, the first accommodating cavity 47 is provided with an opening at the first end surface 41, and the inner diameter of the first accommodating cavity 47 gradually decreases from the opening to the second accommodating cavity 48.
The part of the polarization maintaining optical fiber 3, which is positioned in the second accommodating cavity 48, is fixed with the waist-shaped microtube 4 through optical fiber light guide glue, the part of the polarization maintaining optical fiber 3, which is positioned in the first accommodating cavity 47, is fixed with the waist-shaped microtube 4 through ultraviolet light curing glue, and the part of the polarization maintaining optical fiber 3, which is exposed out of the waist-shaped microtube 4 and is close to the first end surface 41, is fixed with the waist-shaped microtube 4 through soft glue 5. Preferably, 353ND glue is adopted as the optical fiber light guide glue. The polarization maintaining fiber 3 comprises a bare fiber part 32, and the bare fiber part 32 is inserted in the second accommodating cavity 48. The fiber end face 31 of the polarization maintaining fiber 3 inserted into the accommodating cavity is flush with the second end face 42. Preferably, the optical fiber end face 31 is a coated end face, and the transmission wavelength of the coated end face is 900nm to 1100 nm; or the transmission wavelength of the end face of the coating film is 1250nm to 1650 nm. Referring to fig. 7, the arrangement direction of the cat-eye holes 311 of the optical fiber end face 31 is arranged in parallel with the first plane 43.
The utility model discloses a single optical fiber waist type microtube optical fiber head is when making, peels off some of polarization maintaining optical fiber 3 and makes the cylindric microtube of conventional into waist type microtube 4. Inserting the polarization maintaining fiber 3 into the containing cavity of the waist-shaped microtube 4, magnifying and displaying the fiber end face 31 under the CCD imaging equipment, and adjusting the cat eye 311 which is aligned with the fiber end face 31. Glue is filled between the polarization maintaining optical fiber 3 and the accommodating cavity of the waist-shaped micro-tube 4 for fixing, and the glue fills the gap between the polarization maintaining optical fiber 3 and the waist-shaped micro-tube 4. Then, irradiating an ultraviolet lamp to temporarily fix the direction of the cat eye, then baking glue by adopting a thermosetting mode, and then supplementing glue 5 to protect the optical fiber at the part of the polarization maintaining optical fiber 3 close to the first end face 41. And after the fixation is finished, grinding the second end surface 42 of the single-fiber waist-shaped microtube optical fiber head. And finally, coating the end face 31 of the optical fiber to finish the manufacture of the optical fiber head.
Second embodiment of single-fiber waist-type microtube fiber tip:
the single-fiber waist-type micro-tube optical fiber head of the present embodiment is different from the single-fiber waist-type micro-tube optical fiber head of the first embodiment only in the arrangement direction of the cat eyes on the end face of the optical fiber. For convenience of explanation, the present embodiment adopts the reference numerals of the first embodiment.
Referring to fig. 8, the arrangement direction of the cat-eyes 311 of the fiber end face 31 is perpendicular to the first plane 43.
Third embodiment of single fiber waist type microtube fiber tip:
the single-fiber waist-type micro-tube optical fiber head of the present embodiment is different from the single-fiber waist-type micro-tube optical fiber head in the first embodiment or the second embodiment only in the inclination angle of the second end surface. For convenience of explanation, the present embodiment adopts the reference numerals of the first embodiment.
Referring to fig. 9, in the present embodiment, the second end surface 42 is inclined at an angle of 8 degrees with respect to the first end surface 41, and the second end surface 42 is inclined from the first plane 43 to the second plane 45.
According to the above, the utility model discloses a single optical fiber waist type microtube optical fiber head is through the waist type microtube cartridge polarization-preserving fiber who utilizes linear symmetry, with the linear symmetry phase-match of the cat eye of polarization-preserving fiber for polarization-preserving fiber receives stress more even, thereby improves polarization and keeps the effect.
It should be noted that the above is only the preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and all the insubstantial modifications made by using the design concept of the present invention also fall within the protection scope of the present invention.
Claims (10)
1. A single optical fiber waist type microtube optical fiber head is characterized in that: comprises a polarization maintaining optical fiber and a waist-shaped microtube;
the micro-pipe comprises a waist-shaped micro-pipe body and is characterized in that a first plane, a first cambered surface, a second plane and a second cambered surface are sequentially arranged in the circumferential direction of the waist-shaped micro-pipe body, the first plane and the second plane are symmetrically arranged in a reverse manner, the first cambered surface and the second cambered surface are symmetrically arranged in a reverse manner, the first plane is respectively adjacent to the first cambered surface and the second cambered surface, and the second plane is respectively adjacent to the first cambered surface and the second cambered surface;
the waist-shaped microtube is also provided with a first end face and a second end face, and the first end face and the second end face are arranged in an opposite way;
the waist-shaped microtube is also provided with an accommodating cavity penetrating through the first end face and the second end face, and the polarization maintaining optical fiber is inserted into the accommodating cavity and is positioned at the central shaft position of the waist-shaped microtube;
the fiber end face of the polarization maintaining fiber inserted into the accommodating cavity and the second end face are positioned on the same plane;
the arrangement direction of the cat eyes on the end face of the optical fiber is parallel to the first plane or perpendicular to the first plane.
2. The single fiber waist-type micro-tube fiber tip as set forth in claim 1, wherein:
on the same cross section of the waist-shaped microtube, the shortest distance between the first plane and the center of the cross section is one fifth smaller than the distance between the first cambered surface and the center of the cross section.
3. The single fiber waist-type micro-tube fiber tip as set forth in claim 1, wherein:
the accommodating cavity comprises a first accommodating cavity and a second accommodating cavity, the first accommodating cavity is communicated with the second accommodating cavity, an opening is formed in the first end face of the first accommodating cavity, and the inner diameter of the first accommodating cavity is gradually reduced towards the second accommodating cavity from the opening.
4. The single fiber waist-type micro-tube fiber tip as set forth in claim 3, wherein:
the polarization maintaining optical fiber comprises a bare fiber part, and the bare fiber part is inserted in the second accommodating cavity.
5. The single fiber waist-type micro-tube fiber tip as set forth in claim 3, wherein:
the part of the polarization maintaining optical fiber, which is positioned in the second accommodating cavity, is fixed with the waist-shaped microtube through optical fiber light guide glue;
and the part of the polarization maintaining optical fiber, which is positioned in the first accommodating cavity, is fixed with the waist-shaped microtube through ultraviolet light curing glue.
6. The single fiber waist-type micro-tube fiber tip as set forth in claim 3, wherein:
the part of the polarization maintaining optical fiber, which is exposed out of the waist-shaped microtube and close to the first end face, is fixed with the waist-shaped microtube through soft glue.
7. The single fiber waist-type microtube fiber tip as set forth in any one of claims 1 to 6, wherein:
the first end face is perpendicular to the first plane, and the second end face is parallel to the first end face.
8. The single fiber waist-type microtube fiber tip as set forth in any one of claims 1 to 6, wherein:
the first end face is perpendicular to the first plane, the second end face is inclined at an angle of 8 degrees relative to the first end face, and the second end face is inclined from the first plane to the second plane.
9. The single fiber waist-type microtube fiber tip as set forth in any one of claims 1 to 6, wherein:
the end face of the optical fiber is a coated end face.
10. The single fiber waist-type micro-tube fiber tip of claim 9, wherein:
the transmission wavelength of the end face of the coating film is 900nm to 1100 nm; or
The transmission wavelength of the end face of the coating film is 1250nm to 1650 nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020943099.XU CN212060639U (en) | 2020-05-28 | 2020-05-28 | Single optical fiber waist type microtube optical fiber head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020943099.XU CN212060639U (en) | 2020-05-28 | 2020-05-28 | Single optical fiber waist type microtube optical fiber head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212060639U true CN212060639U (en) | 2020-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020943099.XU Active CN212060639U (en) | 2020-05-28 | 2020-05-28 | Single optical fiber waist type microtube optical fiber head |
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| Country | Link |
|---|---|
| CN (1) | CN212060639U (en) |
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2020
- 2020-05-28 CN CN202020943099.XU patent/CN212060639U/en active Active
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