CN210468365U - Reflector assembly and laser - Google Patents

Abstract

A mirror assembly and a laser, the mirror assembly includes: a rotating shaft; the first rotating plate is fixedly connected with the rotating shaft, a first embedding hole and a second embedding hole are formed in the first rotating plate, and a first reflective mirror is arranged on the second embedding hole; the rotating shaft penetrates through the second rotating plate, the second rotating plate is fixedly connected with the rotating shaft, the second rotating plate and the first rotating plate are arranged at intervals, a first through hole, a second through hole and a third through hole are formed in the second rotating plate, the first through hole, the second through hole and the third through hole are uniformly distributed around the rotating shaft, the first through hole is aligned to the first embedding hole, the second through hole is aligned to the second embedding hole, and a second reflector is arranged on the second through hole. The reflector assembly is convenient to operate, facilitates the simplification of operation steps, and is beneficial to reducing the size of a light spot after laser coupling and improving the coupling efficiency.

Description

Reflector assembly and laser

Technical Field

The utility model relates to a technical field is made to the laser instrument, especially relates to a reflector subassembly and laser instrument.

Background

The holmium laser is a pulse solid laser made of a laser crystal of Yttrium Aluminum Garnet (YAG), doped sensitized ion chromium (Cr), energy transfer ion thulium (Tm) and active ion holmium (Ho). The laser wavelength of holmium output by the holmium laser is 2.1 mu m, and is just near the absorption peak of water, and the laser energy can be well absorbed by human tissues. The holmium laser beam is transmitted through the optical fiber, can reach pathological change tissues of all parts of a human body, and cuts the pathological change tissues. Holmium lasers have been widely used in urological, ENT, dermatology, gynecologic and other surgical procedures.

Due to the limitation of photoelectric conversion efficiency, a single laser cavity cannot meet the requirement of high-power laser output, and therefore, a holmium laser usually comprises two or more laser cavities. Laser beams generated by two or more laser cavities need to be coupled into an optical fiber through a coupling mirror, so that high-power holmium laser output can be realized.

However, the structure of the existing holmium laser still needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem provide a reflector subassembly and laser instrument, convenient operation helps simplifying the operating procedure, still helps improving the uniformity of waiting coupling laser direction transmission, reduces the facula size behind the laser coupling.

In order to solve the above problem, the utility model provides a reflector assembly, include: a rotating shaft; the rotating shaft penetrates through the first rotating plate, the first rotating plate is fixedly connected with the rotating shaft, a first embedding hole and a second embedding hole are formed in the first rotating plate, and a first reflector is arranged on the second embedding hole; the rotating shaft penetrates through the second rotating plate, the second rotating plate is fixedly connected with the rotating shaft, the second rotating plate and the first rotating plate are arranged at intervals, a first through hole, a second through hole and a third through hole are formed in the second rotating plate, the first through hole, the second through hole and the third through hole are uniformly distributed around the rotating shaft, the first through hole is aligned to the first embedding hole, the second through hole is aligned to the second embedding hole, and a second reflector is arranged on the second through hole.

Optionally, the first embedding hole, the second embedding hole, the first through hole, the second through hole and the third through hole have the same aperture.

Optionally, the mirror assembly further includes: the motor is connected with one end of the rotating shaft and is suitable for driving the rotating shaft to rotate, and the second rotating plate is located between the motor and the first rotating plate.

The utility model discloses still provide one kind and include above reflector assembly's laser instrument, the laser instrument still includes: a coupling mirror having an optical axis; a laser resonator assembly comprising: the laser device comprises a first laser resonant cavity, a second laser resonant cavity and a third laser resonant cavity, wherein the first laser resonant cavity is positioned on an optical axis, the first laser resonant cavity, the second laser resonant cavity and the third laser resonant cavity are sequentially arranged at intervals along a first direction, the first direction is perpendicular to the optical axis, a reflector component is positioned between the first laser resonant cavity and a coupling mirror, and an included angle is formed between a rotating shaft and the optical axis; a first mirror adapted to reflect laser light emitted from the second laser resonator onto the first rotating plate in the first direction; and the second reflector is suitable for reflecting the laser emitted by the third laser resonant cavity onto the second rotating plate along the first direction.

Optionally, the rotating shaft is rotated to adjust the center of the first embedding hole and the center of the third through hole to the optical axis, and a laser beam emitted by the first laser resonator is suitable for passing through the first embedding hole and the third through hole and being transmitted to the coupling mirror along the optical axis.

Optionally, the rotating shaft is rotated to adjust the center of the second embedding hole and the center of the first through hole to the optical axis, and a laser beam emitted by the second laser resonant cavity is reflected by the first reflector and the first reflector, passes through the first through hole, and is transmitted to the coupling mirror along the optical axis.

Optionally, the rotating shaft is rotated to adjust the center of the second through hole to the optical axis, and a laser beam emitted by the third laser resonator is reflected by the second reflecting mirror and transmitted to the coupling mirror along the optical axis.

Optionally, the laser further includes: the optical fiber, reflector assembly with the optic fibre is located respectively the both sides of coupling mirror, the optic fibre is followed the optical axis extends.

Optionally, the laser further includes: a lens positioned between the mirror assembly and the coupling mirror, the lens adapted to reflect a portion of the laser light directed toward the coupling mirror; a detector adapted to receive laser light reflected by the lens.

Optionally, the laser further includes: and the control unit receives the power signal output by the detector and controls the laser resonant cavity component according to the power signal.

Compared with the prior art, the technical scheme of the utility model have following advantage:

the utility model provides an among the reflector assembly's the technical scheme, reflector assembly includes: the mirror comprises a rotating shaft, a first rotating plate, a second rotating plate, a first reflector and a second reflector. The first rotating plate and the second rotating plate are both fixedly arranged on the rotating shaft, and the first rotating plate and the second rotating plate can be simultaneously rotated by rotating the rotating shaft. The second rotating plate is provided with a first through hole, a second through hole and a third through hole, and the first through hole, the second through hole and the third through hole are uniformly distributed around the rotating shaft, so that the rotating shaft is rotated, and the first through hole, the second through hole and the third through hole can exchange spatial positions. Specifically, the rotating shaft is rotated by 120 degrees each time, and the first through hole, the second through hole and the third through hole exchange spatial positions once. The first rotating plate is provided with a first embedding hole and a second embedding hole, and the first embedding hole is aligned to the first through hole, and the second embedding hole is aligned to the second through hole, so that the rotating shaft is rotated by 120 degrees or reversely rotated by 240 degrees, and the spatial positions of the first embedding hole and the second embedding hole can be exchanged. Therefore, by rotating the rotating shaft, the spatial positions of the first embedding hole and the second embedding hole can be exchanged, and meanwhile, the spatial positions of the first through hole, the second through hole and the third through hole are exchanged mutually.

According to the above analysis, the inclination direction of the rotation axis is adjusted, so that in an initial state, the center of the first embedding hole and the center of the third through hole are both located on one optical axis in the space, and then the center of the second embedding hole and the center of the first through hole can be simultaneously adjusted to the optical axis by rotating the rotation axis. Further, by rotating the rotating shaft, the center of the second through hole can be adjusted to the optical axis. Therefore, a straight line where the center of the first embedding hole is connected with the center of the third through hole is used as a first optical transmission path, a straight line where the center of the second embedding hole is connected with the center of the first through hole is used as a second optical transmission path, the first optical transmission path can be coincided with the optical axis only by rotating the rotating shaft, the rotating shaft is rotated again, and the second optical transmission path can be coincided with the optical axis.

In summary, the mirror assembly can simultaneously adjust the positions of the first reflective mirror and the second reflective mirror to sequentially adjust different optical transmission paths to the same optical axis, so that the operation is convenient and the operation steps are simplified. In addition, the reflector assembly is also beneficial to adjusting three groups of laser beams emitted by the laser resonant cavity assembly to the same light path, so that the size of a light spot after laser coupling can be effectively reduced, and the coupling efficiency is improved.

Drawings

Fig. 1 is a schematic structural view of a mirror assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a laser according to an embodiment of the present invention.

Detailed Description

Analysis is now performed in conjunction with a laser, the laser comprising: a coupling mirror having an optical axis; a laser resonator assembly comprising: the laser device comprises a first laser resonant cavity, a second laser resonant cavity and a third laser resonant cavity, wherein the laser emitting direction of the laser resonant cavity component is parallel to the optical axis, the first laser resonant cavity, the second laser resonant cavity and the third laser resonant cavity are sequentially arranged at intervals along a first direction, and the first direction is perpendicular to the optical axis; the laser resonator comprises a laser resonator component and a coupling mirror, wherein the laser resonator component is arranged on the coupling mirror, and the coupling mirror is arranged on the laser resonator component. In order to sequentially reflect the laser beams emitted by the first laser resonant cavity, the second laser resonant cavity and the third laser resonant cavity to the coupling mirror, the positions of the single reflectors need to be adjusted, the operation is complex, and three groups of laser beams emitted by the laser resonant cavity assembly are difficult to adjust to the same light path, so that the light spot after laser coupling is large, and the laser energy coupled into the optical fiber is low.

The inventor researches the laser, and through creative work, the inventor notices that the positions of the first reflector and the second reflector of the reflector component can be adjusted simultaneously only by rotating the rotating shaft of the reflector component through arranging the reflector component, so that the operation is convenient, and the simplification of operation steps is facilitated.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

Referring to fig. 1, a mirror assembly 100 includes: a rotation shaft 110, a first rotation plate 210, and a second rotation plate 220. The first rotating plate 210 is fixed to the rotating shaft 110, and the surface of the first rotating plate 210 is perpendicular to the rotating shaft 110. The second rotating plate 220 is fixedly disposed on the rotating shaft 110, and a surface of the second rotating plate 220 is perpendicular to the rotating shaft 110. The first rotating plate 210 and the second rotating plate 220 are separately arranged on the rotating shaft 110.

In this embodiment, the first rotation plate 210 has a circular shape, and a first fixing hole is formed at the center of the first rotation plate 210, and the rotation shaft 110 is inserted through the first fixing hole. In other embodiments, the first rotation plate 210 may also have a triangular, rectangular or diamond shape.

In this embodiment, the first rotating plate 210 is fixed to the rotating shaft 110 in a snap-fit manner. In other embodiments, the first rotating plate 210 is screwed to the rotating shaft 110.

In this embodiment, the second rotating plate 220 is also circular, and a second fixing hole is formed in the center of the second rotating plate 220, and the rotating shaft 110 passes through the second fixing hole. In other embodiments, the second rotating plate 220 may also have a triangular, rectangular or diamond shape.

In this embodiment, the second rotating plate 220 is fixed to the rotating shaft 110 in a clamping manner. In other embodiments, the second rotating plate 220 is screwed with the rotating shaft 110.

The first rotation plate 210 has a first insertion hole 211 and a second insertion hole 212. In this embodiment, the first rotating plate 210 further has third insertion holes 213, and the first insertion holes 211, the second insertion holes 212, and the third insertion holes 213 are uniformly distributed around the rotating shaft 110.

The second rotating plate 220 has a first through hole 221, a second through hole 222 and a third through hole 223, the first through hole 221, the second through hole 222 and the third through hole 223 are uniformly distributed around the rotating shaft 110, the first through hole 221 is aligned with the first embedding hole 211, and the second through hole 222 is aligned with the second embedding hole 212. In this embodiment, the third through hole 223 is aligned with the third embedding hole 213.

In this embodiment, the mirror assembly 100 further includes: a first reflective mirror 310 and a second reflective mirror 320, wherein the first reflective mirror 310 is positioned on the second insertion hole 212, and the second reflective mirror 320 is positioned on the second through hole 222.

In this embodiment, the first reflective mirror 310 is circular, and the diameter of the first reflective mirror 310 is equal to the diameter of the second insertion hole 212. The second reflective mirror 320 is circular, and the diameter of the second reflective mirror 320 is equal to the diameter of the second through hole 222.

In this embodiment, the first embedding hole 211, the second embedding hole 212, the third embedding hole 213, the first through hole 221, the second through hole 222, and the third through hole 223 have the same hole diameter.

The first and second rotating plates 210 and 220 are fixed to the rotating shaft 110, and the first and second rotating plates 210 and 220 can be rotated simultaneously by rotating the rotating shaft 110. Since the first through holes 221, the second through holes 222, and the third through holes 223 are uniformly distributed around the rotation shaft 110, and since the surface of the second rotation plate 220 is perpendicular to the rotation shaft 110, the rotation shaft 110 is rotated, so that the first through holes 221, the second through holes 222, and the third through holes 223 can exchange spatial positions. Specifically, the rotating shaft 110 rotates 120 ° each time, and the first through hole 221, the second through hole 222, and the third through hole 223 exchange spatial positions once.

The first insertion hole 211 and the second insertion hole 212 may also exchange spatial positions by rotating the rotation shaft 110. Specifically, since the first through hole 221 is aligned with the first insertion hole 211 and the second through hole 222 is aligned with the second insertion hole 212, the first insertion hole 211 and the second insertion hole 212 can exchange spatial positions by rotating the rotating shaft 110 by 120 ° or rotating the rotating shaft in the opposite direction by 240 °. In this embodiment, the first insertion hole 211, the second insertion hole 212, and the third insertion hole 213 are exchanged in spatial positions every time the rotating shaft 110 rotates 120 °.

Thus, by rotating the rotation shaft 110, it is possible to exchange the spatial positions of the first insertion hole 211 and the second insertion hole 212, and at the same time, exchange the spatial positions among the first through hole 221, the second through hole 222, and the third through hole 223.

According to the above analysis, the inclination direction of the rotating shaft 110 is adjusted, so that in the initial state, the center of the first embedding hole 211 and the center of the third through hole 223 are located on a standard alignment line in the space, and the position of the standard alignment line in the space is fixed, and then the center of the second embedding hole 212 and the center of the first through hole 221 can be simultaneously adjusted to the standard alignment line by rotating the rotating shaft 110. Further, by rotating the rotation shaft 110, the center of the second through hole 222 can be adjusted to the standard alignment line.

In this embodiment, the mirror assembly 100 further includes: a motor connected to one end of the rotation shaft 110 and adapted to drive the rotation shaft 110 to rotate, wherein the second rotation plate 220 is located between the motor and the first rotation plate 210.

In this embodiment, the mirror assembly 100 further includes: the supporting portion 120 includes the supporting base 121 and a supporting rod 122 fixedly disposed on the supporting base 121. The supporting rod 122 has a connecting hole 123, and the connecting hole 123 penetrates through the side wall of the supporting rod 122. One end of the rotating shaft 110 near the second rotating plate 220 passes through the connecting hole 123, and the rotating shaft 110 can rotate relative to the connecting hole 123. A motor shaft of the motor is connected to the rotating shaft 110 through the connecting hole 123 to drive the rotating shaft 110 to rotate, and further, the first rotating plate 210 and the second rotating plate 220 are driven to rotate.

Referring to fig. 2, a laser includes: coupling mirror 400, laser resonator assembly, mirror assembly 100, first mirror 610, and second mirror 620.

The coupling mirror 400 has an optical axis 401, and a straight line where the optical axis 401 is located is used as the standard straight line.

The laser resonator assembly includes: the laser device comprises a first laser resonant cavity 510, a second laser resonant cavity 520 and a third laser resonant cavity 530, wherein the laser emitting direction of the laser resonant cavity assembly is parallel to the optical axis 401, the first laser resonant cavity 510, the second laser resonant cavity 520 and the third laser resonant cavity 530 are sequentially arranged at intervals along a first direction, and the first direction is perpendicular to the optical axis 401.

In this embodiment, the laser beams emitted by the first laser resonant cavity 510, the second laser resonant cavity 520, and the third laser resonant cavity 530 are all holmium laser beams.

In this embodiment, the first laser resonator 510 includes: a first resonant cavity 511, a first fully reflective mirror 512, and a first half reflective mirror 513. The central axis of the first resonator cavity 511 coincides with the optical axis 401. The first resonator cavity 511 has a first front end facing the coupling mirror 400 and a first rear end extending along the optical axis 401 in a direction away from the coupling mirror 400. The first full mirror 512 and the first half mirror 513 are respectively located at two ends of the first resonant cavity 511. The first fully reflective mirror 512 faces the first rear end, and a space is provided between the first fully reflective mirror 512 and the first rear end. The first half mirror 513 is close to the first front end, and a space is formed between the first half mirror 513 and the first front end.

The first resonant cavity 511 generates a light wave, the light wave is reflected by the first full mirror 512 and the first half mirror 513, and the light wave continuously travels back and forth between the first full mirror 512 and the first half mirror 513 to generate oscillation. The first half mirror 513 can transmit a part of the laser light, and the laser light transmitted through the first half mirror 513 is used as the usable laser light emitted from the first laser resonator 510.

Thus, the first laser beam 541 is emitted from the first laser cavity 510, and the emitting direction of the first laser beam 541 coincides with the optical axis 401.

In this embodiment, the mirror assembly 100 is located between the first laser resonator 510 and the coupling mirror 400.

The mirror assembly 100 is placed in an inclined manner, and an included angle is formed between the rotating shaft 110 and the optical axis 401, so that the situation that the laser transmission path is blocked due to the fact that the rotating shaft 110 and the optical axis 401 are overlapped can be avoided.

In this embodiment, an included angle between the rotating shaft 110 and the optical axis 401 is 45 °.

In this embodiment, the first rotating plate 210 is disposed obliquely toward the first laser cavity 510, the first laser beam 541 firstly irradiates the first rotating plate 210, and then is transmitted to the second rotating plate 220 through the first rotating plate 210, and further transmitted to the coupling mirror 400, and the direction of the first laser beam 541 is not changed during the transmission process.

In order to allow the first laser beam 541 to smoothly pass through the first rotating plate 210 and the second rotating plate 220, it is necessary to adjust the tilting direction of the rotating shaft 110 and perform a first rotating operation on the rotating shaft 110 such that, in an initial state, a straight line where a line connecting the center of the first insertion hole 211 (see fig. 1) and the center of the third through hole 223 (see fig. 1) coincides with the optical axis 401. The first laser beam 541 is sequentially transmitted to the coupling mirror 400 along the optical axis 401 through the first embedding hole 211 and the third through hole 223.

In this embodiment, the second laser resonator 520 includes: a second resonant cavity 521, a second fully reflective mirror 522, and a second half reflective mirror 523. The central axis of the second resonator chamber 521 is parallel to the optical axis 401. The second resonant cavity 521 has a second front end and a second rear end. The second full mirror 522 and the second half mirror 523 are respectively located at two ends of the first resonant cavity 511, wherein the second full mirror 522 is close to the second rear end, and the second half mirror 523 is close to the second front end.

The second laser beam 542 resonant cavity 520 emits a second laser beam 542, and the emitting direction of the second laser beam 542 is parallel to the optical axis 401.

The first mirror 610 is disposed to be inclined toward the second laser resonator 520, and the first mirror 610 is adapted to reflect the laser light emitted from the second laser resonator 520 to the first rotating plate 210 along the first direction, and then to reflect the laser light to the second rotating plate 220 through the first rotating plate 210, and further to transmit the laser light to the coupling mirror 400. The transmission direction of the second laser beam 542 reflected by the first rotating plate 210 coincides with the optical axis 401.

In this embodiment, an angle between the incident light and the reflected light of the second laser beam 542 irradiated onto the first reflecting mirror 610 is 90 °.

In this embodiment, in order to transmit the second laser beam 542 to the coupling mirror 400 through the first rotating plate 210 and the second rotating plate 220, a second rotating operation is performed on the rotating shaft 110, and the center of the second inserting hole 212 (refer to fig. 1) and the center of the first through hole 221 (refer to fig. 1) are adjusted to the optical axis 401. The second laser beam 542 is reflected by the first reflecting mirror 610 to the first reflecting mirror 310, and is reflected again by the first reflecting mirror 310, the transmission direction of the second laser beam 542 coincides with the optical axis 401, and the second laser beam 542 passes through the first through hole 221 and is transmitted to the coupling mirror 400 along the optical axis 401.

In this embodiment, the angle between the incident light and the reflected light of the second laser beam 542 irradiated onto the first reflective mirror 310 (see fig. 1) is 90 °.

In this embodiment, the third laser resonant cavity 530 includes: a third resonant cavity 531, a third fully reflective mirror 532 and a third semi-reflective mirror 533. The central axis of the third resonant cavity 531 is parallel to the optical axis 401. The third resonant cavity 531 has a third front end and a third rear end. The third fully-reflective mirror 532 and the third semi-reflective mirror 533 are respectively located at two ends of the third resonant cavity 531, wherein the third fully-reflective mirror 532 is close to the third rear end, and the third semi-reflective mirror 533 is close to the third front end.

The third laser beam 543 resonant cavity 530 emits a third laser beam 543, and the emitting direction of the third laser beam 543 is parallel to the optical axis 401.

The second mirror 620 is disposed to be inclined toward the third laser resonator 530, the second mirror 620 is adapted to reflect the laser beam emitted from the third laser resonator 530 onto the second rotating plate 220 along the first direction, and then reflect the laser beam onto the coupling mirror 400 via the second mirror 320 (refer to fig. 1), and a transmission direction of the third laser beam 543 reflected by the second mirror 320 coincides with the optical axis 401.

In this embodiment, an included angle between the incident light and the reflected light of the third laser beam 543 irradiated onto the second reflecting mirror 620 is 90 °.

In this embodiment, in order to reflect the third laser beam 543 to the coupling mirror 400 through the second rotating plate 220, a third rotating operation is performed on the rotating shaft 110 to adjust the center of the second through hole 222 to the optical axis 401, the third laser beam 543 is reflected to the second reflecting mirror 320 (refer to fig. 1) through the second reflecting mirror 620, and is reflected again through the second reflecting mirror 320, and a transmission direction of the third laser beam 543 coincides with the optical axis 401, and is then transmitted to the coupling mirror 400 along the optical axis 401.

In this embodiment, an included angle between the incident light and the reflected light of the third laser beam 543 irradiated onto the second reflective mirror 320 is 90 °.

The first, second, and third rotation operations are cyclically performed so that the first, second, and third laser beams 541, 542, and 543 are continuously transmitted to the coupling mirror 400 in sequence, and then coupled through the coupling mirror 400.

In this embodiment, the laser further includes: the optical fiber 700, the mirror assembly 100 and the optical fiber 700 are located at two sides of the coupling mirror 400, and the extending direction of the optical fiber 700 coincides with the optical axis 401.

The optical fiber 700 is adapted to receive the first, second, and third laser beams 541, 542, 543 coupled by the coupling mirror 400. The smaller the spot size of the first, second, and third laser beams 541, 542, and 543 coupled by the coupling mirror 400, the higher the laser energy coupled into the optical fiber 700.

In this embodiment, the mirror assembly 100 adjusts the first laser beam 541, the second laser beam 542, and the third laser beam 543 to be transmitted along the optical axis 401, which is helpful to improve the consistency of the transmission directions of the first laser beam 541, the second laser beam 542, and the third laser beam 543, and can effectively reduce the size of a laser spot after laser coupling, and improve the coupling efficiency and the laser energy coupled into the optical fiber 700.

In addition, in an initial state, the center of the first insertion hole 211 and the center of the third through hole 223 are located on the optical axis 401, and the center of the second insertion hole 212 and the center of the first through hole 221 can be adjusted to the optical axis 401 by rotating the rotating shaft 110 and rotating by a proper angle; by rotating the rotating shaft 110 by a proper angle, the center of the second through hole 222 can be adjusted to the optical axis 401. Therefore, the light transmission operation of the first laser beam 541, the second laser beam 542 and the third laser beam 543 to the coupling mirror 400 can be achieved by only rotating the rotating shaft 110, so that the adjustment operation of the first reflective mirror 310 and the adjustment operation of the second reflective mirror 320 are not independent due to the scattered arrangement of the first reflective mirror 310 and the second reflective mirror 320, and the positions and the inclination angles of the first reflective mirror 310 and the second reflective mirror 320 do not need to be adjusted respectively, which is convenient to operate and helps to simplify the operation steps.

The laser further includes: a lens 810, the lens 810 being located between the mirror assembly 100 and the coupling mirror 400, the lens 810 being adapted to reflect a portion of the laser light directed to the coupling mirror 400; a detector 820, the detector 820 adapted to receive laser light reflected by the lens 810.

Most of the first, second and third laser beams 541, 542 and 543 are transmitted to the coupling mirror 400 through the lens 810, and the transmission direction is not affected. A small portion of the first, second, and third laser beams 541, 542, 543 are reflected at the surface of the lens 810, and are reflected by the surface of the lens 810 to the detector 820.

In this embodiment, the transmittance of the lens 810 is 99%.

In this embodiment, an included angle between the lens 810 and the optical axis 401 is 45 °.

The detector 820 detects the power of the received laser beam, and the detector 820 outputs a power signal. The laser further includes: a control unit (not shown in the figure) receiving the power signal and controlling the laser resonant cavity assembly according to the power signal.

In this embodiment, the control unit controls the input current or voltage of the laser resonant cavity component according to the power signal, which is helpful for realizing automatic regulation and control of the laser resonant cavity component and improving laser coupling efficiency.

The laser coupling method of the laser will be described in detail with reference to fig. 1 and 2.

Executing the step one: by adjusting the inclination direction of the rotating shaft 110 and performing a first rotation operation on the rotating shaft 110, the center of the first embedding hole 211 and the center of the third through hole 223 are adjusted to the optical axis 401, so that in an initial state, a straight line where a connecting line of the center of the first embedding hole 211 and the center of the third through hole 223 is located coincides with the optical axis 401. When the first laser resonator 510 is turned on, the first laser resonator 510 emits a first laser beam 541, and the first laser beam 541 sequentially passes through the first embedding hole 211 and the third through hole 223 and continues to be transmitted to the coupling mirror 400 along the optical axis 401. A straight line where a connecting line of the center of the first embedding hole 211 and the center of the third through hole 223 is located serves as a light transmission path of the first laser beam 541, and the light transmission path of the first laser beam 541 coincides with the optical axis 401.

And (5) executing the step two: the second rotation operation is performed on the rotation shaft 110, and the center of the second insertion hole 212 and the center of the first through hole 221 are adjusted to the optical axis 401.

When the second laser resonant cavity 520 is turned on, the second laser beam 542 emitted from the second laser beam 542 resonant cavity 520 is reflected by the first reflector 610 onto the first reflective mirror 310, and is reflected by the first reflective mirror 310, the reflected light direction is along the optical axis 401, and the reflected light passes through the first through hole 221 and is transmitted to the coupling mirror 400. A straight line where a line connecting the center of the second embedding hole 212 and the center of the first through hole 221 is located serves as a light transmission path of the second laser beam 542, and the light transmission path of the second laser beam 542 coincides with the optical axis 401.

And step three is executed: the rotating shaft 110 is rotated by a third operation to adjust the center of the second through hole 222 to the optical axis 401.

When the third laser resonant cavity 530 is turned on, the third laser beam 543 resonant cavity 530 emits a third laser beam 543, the third laser beam 543 is reflected by the second reflecting mirror 620 to the second reflecting mirror 320, and is reflected by the second reflecting mirror 320, and the reflected light is transmitted to the coupling mirror 400 along the optical axis 401.

The first, second, and third rotation operations are cyclically performed, and the first, second, and third laser beams 541, 542, and 543 are continuously transmitted to the coupling mirror 400 in sequence and then coupled through the coupling mirror 400.

Modulated by the mirror assembly 100, the first laser beam 541, the second laser beam 542, and the third laser beam 543 are all transmitted along the optical axis 401, which can effectively reduce the size of a spot after laser coupling, improve coupling efficiency, and enhance the laser energy coupled into the optical fiber 700.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims (10)

1. A mirror assembly, comprising:

a rotating shaft;

the rotating shaft penetrates through the first rotating plate, the first rotating plate is fixedly connected with the rotating shaft, a first embedding hole and a second embedding hole are formed in the first rotating plate, and a first reflector is arranged on the second embedding hole;

the rotating shaft penetrates through the second rotating plate, the second rotating plate is fixedly connected with the rotating shaft, the second rotating plate and the first rotating plate are arranged at intervals, a first through hole, a second through hole and a third through hole are formed in the second rotating plate, the first through hole, the second through hole and the third through hole are uniformly distributed around the rotating shaft, the first through hole is aligned to the first embedding hole, the second through hole is aligned to the second embedding hole, and a second reflector is arranged on the second through hole.

2. The mirror assembly of claim 1 wherein the first insert hole, the second insert hole, the first through hole, the second through hole, and the third through hole have equal diameters.

3. The mirror assembly of claim 1 further comprising: the motor is connected with one end of the rotating shaft and is suitable for driving the rotating shaft to rotate, and the second rotating plate is located between the motor and the first rotating plate.

4. A laser comprising a mirror assembly according to any one of claims 1 to 3, further comprising:

a coupling mirror having an optical axis;

a laser resonator assembly comprising: the laser device comprises a first laser resonant cavity, a second laser resonant cavity and a third laser resonant cavity, wherein the first laser resonant cavity is positioned on an optical axis, the first laser resonant cavity, the second laser resonant cavity and the third laser resonant cavity are sequentially arranged at intervals along a first direction, the first direction is perpendicular to the optical axis, a reflector component is positioned between the first laser resonant cavity and a coupling mirror, and an included angle is formed between a rotating shaft and the optical axis;

a first mirror adapted to reflect laser light emitted from the second laser resonator onto the first rotating plate in the first direction;

and the second reflector is suitable for reflecting the laser emitted by the third laser resonant cavity onto the second rotating plate along the first direction.

5. The laser of claim 4, wherein rotating the rotating shaft adjusts a center of the first recessed hole and a center of the third through hole to the optical axis, and wherein a laser beam emitted from the first laser resonator is adapted to pass through the first recessed hole and the third through hole and to be transmitted along the optical axis to the coupling mirror.

6. The laser of claim 4, wherein the rotation axis is rotated to adjust the center of the second embedding hole and the center of the first through hole to the optical axis, and wherein the laser beam emitted from the second laser resonator is reflected by the first mirror and the first mirror, passes through the first through hole, and is transmitted to the coupling mirror along the optical axis.

7. The laser of claim 4, wherein the rotation axis is rotated to center the second through hole on the optical axis, and wherein the laser beam from the third laser resonator is reflected by the second mirror and transmitted along the optical axis to the coupling mirror.

8. The laser of claim 4, further comprising: the optical fiber, reflector assembly with the optic fibre is located respectively the both sides of coupling mirror, the optic fibre is followed the optical axis extends.

9. The laser of claim 4, further comprising: a lens positioned between the mirror assembly and the coupling mirror, the lens adapted to reflect a portion of the laser light directed toward the coupling mirror;

a detector adapted to receive laser light reflected by the lens.

10. The laser of claim 9, further comprising: and the control unit receives the power signal output by the detector and controls the laser resonant cavity component according to the power signal.

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