CN219641976U - Optical fiber coupling debugging structure - Google Patents
Optical fiber coupling debugging structure Download PDFInfo
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- CN219641976U CN219641976U CN202320102422.4U CN202320102422U CN219641976U CN 219641976 U CN219641976 U CN 219641976U CN 202320102422 U CN202320102422 U CN 202320102422U CN 219641976 U CN219641976 U CN 219641976U
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- red light
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 62
- 230000008878 coupling Effects 0.000 title claims abstract description 34
- 238000010168 coupling process Methods 0.000 title claims abstract description 34
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 34
- 239000000835 fiber Substances 0.000 claims description 12
- 239000004065 semiconductor Substances 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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Abstract
The utility model relates to an optical fiber coupling debugging structure which comprises a laser, an optical fiber, a coupling head, a red light laser, a first total reflection mirror and a second total reflection mirror, wherein the coupling head is arranged at the first end of the optical fiber and is used for coupling laser output by the laser into the optical fiber. The position of the output light of the red light laser on the second full-return mirror and the first full-return mirror can be marked as A, B, the position of the output laser of the laser on the first full-return mirror and the second full-return mirror can be marked as C, D, the angle of the second full-return mirror is adjusted so that the point B is overlapped with the point C, the angle of the first full-return mirror is adjusted so that the point D is overlapped with the point A, at the moment, the output laser of the laser is overlapped with the red light reference light coupled and output by the optical fiber, the red light reference light is emitted from the center of the optical fiber, and the laser can be incident to the center of the optical fiber according to the principle of reversibility of the optical path; the utility model has simple and reasonable structure, can realize high-precision adjustment and is convenient to operate.
Description
Technical Field
The utility model relates to an optical fiber coupling debugging structure.
Background
The common optical fiber coupling debugging method is that firstly, laser to be coupled to an optical fiber is overlapped with a low-power visible reference light, then the reference light is debugged and coupled into the optical fiber, and finally, the laser is finely tuned to ensure that the optical fiber coupling output is optimal.
The obvious disadvantage of the above method is that it is difficult to ensure that the laser light is incident on the center of the fiber. The optical fiber coupling output effect of the low-power laser debugging is good; however, for the optical fiber coupling of the high-power laser, because the output beam mode is different from that of the high-power laser, the focusing light spot is larger through the coupling lens under the high power, if the debugging laser is not incident to the center of the optical fiber under the low power, the laser is easy to be incident to the edge of the optical fiber under the high power to damage the optical fiber.
Therefore, for the current optical fiber coupling debugging structure, further improvement is needed.
Disclosure of Invention
Aiming at the current state of the art, the utility model provides the optical fiber coupling debugging structure which can ensure that laser is incident to the center of an optical fiber so as to avoid damaging the optical fiber and has high adjusting precision.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides an optic fibre coupling debugging structure, includes laser instrument, optic fibre and coupling head, the coupling head is located optic fibre first end department, is arranged in the laser coupling of laser instrument output to optic fibre, still includes:
the red light laser is arranged at the second end of the optical fiber and is used for inputting red light into the optical fiber; the direction of outputting red light at the first end of the optical fiber is parallel to the direction of outputting laser light by the laser;
the first total reflection mirror is movably arranged on a light path of laser output laser;
the second total reflection mirror is movably arranged on the optical path of the red light output by the first end of the optical fiber and is arranged in parallel with the first total reflection mirror.
Preferably, a first focusing lens is arranged between the second total reflection mirror and the coupling head, and is used for focusing the light emitted by the laser and then making the light enter the optical fiber.
Preferably, the red light laser comprises a 650nm semiconductor laser and a second focusing lens which are sequentially arranged along the output direction of the red light, and the red light laser is detachably connected with the second end of the optical fiber. The 650nm semiconductor laser is a low-power optical fiber coupled output red light laser, and the low-power optical fiber coupled output visible light is realized by matching the red light laser with the second focusing lens.
Preferably, the first total reflection mirror and the second total reflection mirror are 45-degree total reflection mirrors. The total reflection mirror is adopted to realize the light path arrangement between the red light laser and the laser, and the light path of the laser to be coupled is further finely adjusted by utilizing the light path reversibility principle so as to ensure that the laser can be incident to the center of the optical fiber.
Preferably, the first total reflection mirror is used for receiving red light output by the red laser and marking as B, receiving laser output by the laser and marking as C, the second total reflection mirror is used for receiving red light output by the red laser and marking as A, receiving laser output by the laser and marking as D, and the positions of the first total reflection mirror and the second total reflection mirror are kept at the positions where B and C coincide and where A and D coincide. The positions of the first total reflection mirror and the second total reflection mirror are adjusted at the position, so that the requirement that laser energy is incident to the center of the optical fiber can be met.
Preferably, the bottom of the first total reflection mirror and/or the second total reflection mirror is provided with a base capable of driving the first total reflection mirror and/or the second total reflection mirror to rotate. By adopting the structure, the angle of the first total reflection mirror and/or the second total reflection mirror can be conveniently adjusted, so that the requirement of adjusting the direction of the light path is met.
Compared with the prior art, the utility model has the advantages that: the position of the output light of the red light laser on the second full-return mirror and the first full-return mirror can be marked as A, B, the position of the output laser of the laser on the first full-return mirror and the second full-return mirror can be marked as C, D, the angle of the second full-return mirror is adjusted so that the point B is overlapped with the point C, the angle of the first full-return mirror is adjusted so that the point D is overlapped with the point A, at the moment, the output laser of the laser is overlapped with the red light reference light coupled and output by the optical fiber, the red light reference light is emitted from the center of the optical fiber, and the laser can be incident to the center of the optical fiber according to the principle of reversibility of the optical path; the utility model has simple and reasonable structure, can realize high-precision adjustment and is convenient to operate.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a propagation path of light emitted from a laser according to an embodiment of the present utility model;
fig. 3 is a schematic diagram of a part of a propagation optical path of a red laser according to an embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1 to 3, the optical fiber coupling debugging structure of the present embodiment includes a laser 1, an optical fiber 6, and a coupling head 5, where the coupling head 5 is disposed at a first end of the optical fiber 6 and is used for coupling laser output by the laser 1 into the optical fiber.
The embodiment is also provided with a red laser, a first total reflection mirror 2 and a second total reflection mirror 3.
Wherein, the red light laser is arranged at the second end of the optical fiber 6 and is used for entering red light into the optical fiber 6; the direction of the red light output by the first end of the optical fiber 6 is parallel to the direction of the laser light output by the laser 1. The red laser of the present embodiment includes a 650nm semiconductor laser 8, a second focusing lens 7, which are disposed in order along the red light output direction, the red laser being detachably connected to the second end of the optical fiber 6. The 650nm semiconductor laser 8 is a low-power optical fiber coupled-out red light laser, and is matched with the second focusing lens 7 to realize optical fiber coupling-out low-power visible light.
The first total reflection mirror 2 is movably arranged on a light path of laser 1 for outputting laser light; the second total reflection mirror 3 is movably arranged on the optical path of the red light output by the first end of the optical fiber 6 and is arranged in parallel with the first total reflection mirror 2. The first total reflection mirror 2 and the second total reflection mirror 3 in this embodiment are all 45-degree total reflection mirrors. The total reflection mirror is adopted to realize the light path arrangement between the red light laser and the laser 1, and the light path of the laser to be coupled is further finely adjusted by utilizing the light path reversibility principle so as to ensure that the laser can be incident to the center of the optical fiber 6.
A first focusing lens 4 is disposed between the second total reflection mirror 3 and the coupling head 5 in this embodiment, and is configured to focus the light emitted from the laser 1 and then make the light incident into the optical fiber 6.
The red laser coupled and output by the optical fiber is coupled and outputs red reference light through the optical fiber to be incident to the first focusing lens 4 through the coupling head, and then is incident to the laser 1 to be coupled with output laser into the optical fiber through the second full-return mirror 3 and the first full-return mirror 2 in sequence.
When the optical fiber coupling is debugged, the first total reflecting mirror 2 is used for receiving red light output by the red light laser and marking as B, receiving laser output by the laser 1 and marking as C, the second total reflecting mirror 3 is used for receiving red light output by the red light laser and marking as A, receiving laser output by the laser 1 and marking as D, firstly, the second total reflecting mirror 3 is regulated, then the first total reflecting mirror 2 is regulated, so that the positions of the first total reflecting mirror 2 and the second total reflecting mirror 3 are kept at the position where B coincides with C and the position where A coincides with D, at the moment, the laser output laser coincides with red reference light output by the optical fiber coupling, the red reference light is emitted from the center of the optical fiber, and according to the principle of reversibility of an optical path, the positions of the first total reflecting mirror 2 and the second total reflecting mirror 3 are regulated at the position where the laser can be incident on the center of the optical fiber.
In the description and claims of the present utility model, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present utility model, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the utility model may be arranged in a variety of orientations, the directional terminology is used for purposes of illustration and is in no way limiting, such as "upper" and "lower" are not necessarily limited to being in a direction opposite or coincident with the direction of gravity.
Claims (4)
1. The utility model provides a fiber coupling debugging structure, includes laser instrument, optic fibre and coupling head, the coupling head is located optic fibre first end department, is arranged in the laser coupling of laser instrument output to optic fibre, its characterized in that: and also comprises
The red light laser is arranged at the second end of the optical fiber and is used for inputting red light into the optical fiber; the direction of outputting red light at the first end of the optical fiber is parallel to the direction of outputting laser light by the laser;
the first total reflection mirror is movably arranged on a light path of laser output laser;
the second total reflection mirror is movably arranged on a light path of the red light output by the first end of the optical fiber and is arranged in parallel with the first total reflection mirror;
the first total reflection mirror and the second total reflection mirror are 45-degree total reflection mirrors.
2. The fiber coupling debug structure of claim 1, wherein: and a first focusing lens is arranged between the second total reflection mirror and the coupling head and used for focusing the light rays emitted by the laser and then making the light rays incident into the optical fiber.
3. The fiber coupling debug structure of claim 2, wherein: the red light laser comprises a 650nm semiconductor laser and a second focusing lens which are sequentially arranged along the output direction of the red light, and the red light laser is detachably connected with the second end of the optical fiber.
4. A fibre-coupled debug structure according to claim 1 or 2 or 3, wherein: the bottom of the first total reflection mirror and/or the second total reflection mirror is provided with a base capable of driving the first total reflection mirror and/or the second total reflection mirror to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320102422.4U CN219641976U (en) | 2023-02-02 | 2023-02-02 | Optical fiber coupling debugging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320102422.4U CN219641976U (en) | 2023-02-02 | 2023-02-02 | Optical fiber coupling debugging structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219641976U true CN219641976U (en) | 2023-09-05 |
Family
ID=87814851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320102422.4U Active CN219641976U (en) | 2023-02-02 | 2023-02-02 | Optical fiber coupling debugging structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219641976U (en) |
-
2023
- 2023-02-02 CN CN202320102422.4U patent/CN219641976U/en active Active
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