CN115598780A - Laser adapter and optical system - Google Patents

Abstract

The application provides a laser adapter and optical system, the laser adapter includes: the light beam conversion device and the light beam stabilizing device are arranged in the shell; the shell is provided with a laser input port and a laser output port; the light beam conversion device is arranged for converting the laser light beam entering the shell; the light beam stabilizing device is arranged at the downstream of the light beam conversion device along the laser transmission direction and is used for adjusting the laser transmission direction so as to correct the deviation of the actual position and the ideal position of the laser beam at the laser output port. According to the technical scheme, under the condition that lasers with different parameters are input or deflection occurs in the laser transmission process, the optical path does not need to be readjusted or an optical device on the optical path does not need to be replaced, and the lasers can be adapted and coupled to the equipment connected behind through the laser adapter by changing the input lasers and adjusting the laser transmission direction.

Description

Laser adapter and optical system

Technical Field

The application relates to the technical field of optics, in particular to a laser adapter and an optical system.

Background

In the laser coupling scheme in the prior art, an adjusting mechanism with multiple degrees of freedom is generally used, a lens is arranged on the adjusting mechanism, space laser is coupled into an optical fiber through the adjusting lens, and in order to ensure the coupling efficiency of the laser, the lens is generally required to be selected according to the size of an output light spot of a laser, the position of a light waist and the like.

However, if the laser is replaced or the spot size is changed, the optical path needs to be readjusted or the lens needs to be reselected, and the adjustment of the optical path and the replacement of the lens are complicated and require professional operation.

In addition, if the environment changes, for example, vibration is generated or temperature changes occur, the output pointing angle of the laser also changes, the normal laser is 25 μ rad/DEG C, if the temperature changes by 10 ℃, the pointing angle changes by 250 μ rad, the laser pointing changes, the coupling efficiency of the optical fiber is sharply reduced, and the performance of the equipment is greatly influenced; and in the case of light beam deflection caused by manual misoperation touch, the system needs to be debugged again.

Disclosure of Invention

In view of this, the present application provides a laser adapter and an optical system to solve the problems of complicated optical path adjustment and lens replacement, and laser coupling efficiency reduction caused by laser variation in the laser coupling scheme in the prior art.

According to an aspect of the present application, there is provided a laser adapter including: the device comprises a shell, and a light beam conversion device and a light beam stabilizing device which are arranged in the shell;

the shell is provided with a laser input port and a laser output port;

the light beam transformation device is arranged for transforming the laser light beam entering the shell;

the beam stabilizing device is arranged at the downstream of the beam conversion device along the laser transmission direction and is used for adjusting the laser transmission direction so as to correct the deviation of the actual position and the ideal position of the laser beam at the laser output port.

Optionally, the beam stabilizing apparatus comprises: the device comprises a position detector, at least one deflection reflector and a reflector adjusting mechanism connected with each deflection reflector;

the position detector is arranged at a position close to the laser output port and used for detecting the position information of the laser at the laser output port;

the reflector adjusting mechanism is arranged to drive the deflection reflector to deflect according to the position information detected by the position detector so as to adjust the laser transmission direction.

Optionally, the laser adapter further includes a control unit, and the control unit receives the position information detected by the position detector and controls the mirror adjusting mechanism according to the position information.

Optionally, the laser adapter further comprises at least one fixed mirror for changing the laser transmission direction, and the fixed mirror is arranged upstream of the beam transformation device in the laser transmission direction.

Optionally, the at least one fixed mirror comprises a first fixed mirror and a second fixed mirror, and the at least one deflecting mirror comprises a first deflecting mirror and a second deflecting mirror;

the laser is reflected to the second fixed reflector through the first fixed reflector, and the second fixed reflector reflects the laser to the light beam transformation device; the laser emitted by the light beam conversion device is reflected to the second deflection reflector through the first deflection reflector, and the second deflection reflector is arranged to reflect the laser to the laser output port.

Optionally, at least one laser power meter is arranged in the housing and used for detecting the power of the laser entering the laser adapter.

Optionally, the at least one laser power meter includes a first laser power meter and a second laser power meter, the first laser power meter is disposed at a position close to the laser input port, and the second laser power meter is disposed at a position close to the laser output port.

Optionally, the laser adapter further comprises a switch device arranged at the laser input port, and the switch device comprises a switch door for opening and closing the laser input port and a door driving mechanism for driving the switch door to switch between an open state and a closed state;

when the switch door is opened, the laser can enter the laser adapter for transmission, and when the switch door is closed, the laser is blocked from entering the laser adapter.

Optionally, a supporting leg is arranged below the shell, and the supporting leg is adjustable in height.

According to another aspect of the present application, there is also provided an optical system comprising a laser, a transmission fiber, an application device body, and the laser adapter as described above; wherein,

the laser is arranged at a laser input port of the laser adapter and used for emitting laser to the laser input port;

one end of the transmission optical fiber is connected with a laser coupler, the laser coupler is connected with the laser output port, and the other end of the transmission optical fiber is connected with the application equipment main body.

In the technical scheme provided by the application, the laser adapter is provided with the light beam conversion device and the light beam stabilizing device, and the light beam conversion device can carry out light beam conversion on input laser, so that the laser can be matched with following equipment, and the best performance of the equipment is achieved. The light beam stabilizing device can adjust the deflection direction of the laser when detecting that the laser beam deviates, and ensure the stable output of the laser, thereby ensuring the coupling efficiency of the laser output. Therefore, by adopting the laser adapter provided by the application, under the condition that lasers with different parameters are input or deflection occurs in the laser transmission process, the optical path does not need to be readjusted or an optical device on the optical path is not needed to be replaced, and the lasers can be adapted and coupled to equipment connected later by changing the input lasers and adjusting the laser transmission direction through the laser adapter.

Additional features and advantages of the present application will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application, and the description of the exemplary embodiments of the application are intended to be illustrative of the application and are not intended to limit the application. In the drawings:

FIG. 1 is a schematic external view of laser adaptation according to an embodiment of the present application;

FIG. 2 is a schematic view of a laser adapter with a cover removed according to an embodiment of the present application;

FIG. 3 is a schematic diagram of an optical system in an embodiment in accordance with the present application.

Description of reference numerals:

100-a laser coupler; 1-a shell; 2-a first fixed mirror; 3-a second fixed mirror; 4-beam switching of gas; 5-a first deflection mirror; 6-a second deflection mirror; 7-a position detector; 8-laser power meter; a 9-beam splitter; 10-a switch mechanism; 11-laser input port; 12-laser output port; 13-support legs; 14-a laser coupler; 15-a transmission fiber; 16-a drive circuit; 200-a laser; 300-application device body.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application. The term "inside" and "outside" refer to the inside and the outside of the contour of each member itself.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

The present application provides a laser adapter, as shown in fig. 1-2, the laser adapter 100 includes: a housing 1, and a light beam conversion device 4 and a light beam stabilizing device which are arranged on the housing 1; wherein,

the housing 1 has a laser input port 11 and a laser output port 12;

the light beam transformation device 4 is arranged for transforming the laser light beam entering the housing 1;

the beam stabilizing device is disposed downstream of the beam converting device 4 in the laser transmission direction for adjusting the deflection direction of the laser beam to correct the deviation of the actual position of the laser beam at the laser output port 12 from the ideal position.

According to the laser adapter, the beam conversion device 4 can be used for carrying out beam conversion on input laser, wherein the beam conversion refers to the fact that the beam is amplified, reduced, zoomed and the like through the conversion characteristics of the optical element, so that the laser can be matched with the following equipment, and the best performance of the equipment is achieved. Moreover, the laser adapter provided by the application can adjust the deflection direction of the laser when detecting that the laser beam deviates through the light beam stabilizing device, so that the laser output is stable, and the coupling efficiency of the laser output is ensured.

Specifically, when lasers with different parameters are adopted and the lasers with different parameters are emitted by the lasers and enter the laser adapter, the light beams with fixed spot sizes can be uniformly output after being converted by the light beam conversion device, so that the lasers output by different lasers can be adapted to equipment connected at the back; alternatively, when the distance of the laser is changed, the beam converter 4 may perform the zoom processing and output a uniform laser beam.

When the environment changes (for example, temperature, humidity, etc., or vibration occurs), each device (for example, the laser itself, the reflecting mirror, the beam splitter, etc.) on the optical path may be vibrated or may be shifted due to the influence of temperature, so that the output direction of the laser changes, and the beam stabilizing device may adjust the deflection direction of the laser in real time according to the deviation between the actual position and the ideal position of the laser output port 12, so as to stabilize the output of the laser, that is, control the laser to be output in the range with smaller deviation from the ideal output position, and ensure the coupling efficiency of the laser output.

Therefore, by adopting the laser adapter provided by the application, under the condition that lasers with different parameters are input or deflection occurs in the laser transmission process, the optical path does not need to be readjusted or an optical device on the optical path does not need to be replaced, and the lasers can be adapted and coupled to equipment connected behind by changing the input lasers and adjusting the laser transmission direction through the laser adapter.

In an embodiment, the beam transformation device 4 may adopt an existing device capable of expanding or contracting the cross section of the laser beam and zooming the laser beam, and the specific structure thereof can be implemented by those skilled in the art, and will not be described herein again.

The beam stabilizing device is located downstream of the beam converter 4 in the laser transmission direction, so that the beam stabilizing device can correct the beam deflection of the laser beam caused by beam enlargement, beam reduction, or beam zooming adjustment by the beam converter 4.

As shown in fig. 2, the beam stabilizing device may include a position detector 7, at least one deflection mirror, and a mirror adjusting mechanism connected to each deflection mirror;

wherein, the position detector 7 is arranged at a position close to the laser output port 12 and is used for detecting the position information of the laser at the laser output port 12. Specifically, a spectroscope 9 may be disposed on the laser transmission path, and part of the laser is directly or indirectly reflected to the position detector 7 by the spectroscope 9, thereby realizing detection of the position detector 7 on the laser position. In the embodiment shown in fig. 2, a beam splitter 9 reflects part of the laser light to a laser power meter 8, and the beam splitter is also arranged in the laser power meter 8 and reflects part of the laser light to the position detector 7. The position detector 7 can adopt a 4D position detector, and the 4D position detector can strictly detect the position drift and the angle drift of the light beam and can accurately detect the real-time position of the light beam.

The reflector adjusting mechanism is arranged to drive the deflection reflector to deflect according to the position information detected by the position detector 7 so as to adjust the transmission direction of the laser, so that the laser is stably output.

Specifically, a desired position of the laser beam at the laser output port 12 is first determined, which is a position where the laser can achieve a desired coupling efficiency when being output-coupled into a device or component (e.g., a transmission fiber) connected at the laser output port 12. When a light beam deflects, for example, the light beam deflects due to the deviation of an optical device caused by vibration, temperature change or the like, or the light beam deflects due to artificial touch or the like, the position detector 7 detects the position information of the laser at the laser output port 12 in real time and sends the position information to the control unit, the control unit continuously determines the deviation between the position of the laser beam and an ideal position according to the position information, and controls the reflector adjusting mechanism to adjust the deflection reflector, so that the reflection direction of the laser is continuously adjusted, and the laser is stably transmitted in a certain range around the ideal position.

The laser adapter further comprises a control unit, wherein the control unit receives the position information detected by the position detector 7 and controls the reflector adjusting mechanism according to the position information. In some embodiments, the control unit may be arranged inside the housing 1, but of course the control unit may also be arranged separately, i.e. the control unit may be a separate module arranged outside the housing 1.

As shown in fig. 2, a drive circuit 16 is further provided in the housing 1 of the laser adapter, and the control unit sends a control signal to the drive circuit 16 to control the operation of the mirror adjustment mechanism by the drive circuit 16.

In one embodiment, the laser adapter 100 further comprises at least one fixed mirror for changing the laser transmission direction, the fixed mirror being disposed upstream of the beam transformation device 4 in the laser transmission direction. The laser transmission direction is changed by arranging the fixed reflector, so that the light path can be bent, the arrangement of each component on the light path is convenient, and the reduction of the volume of the whole laser adapter is facilitated.

In the embodiment shown in fig. 2, the at least one fixed mirror comprises a first fixed mirror 2 and a second fixed mirror 3, and the at least one deflecting mirror comprises a first deflecting mirror 5 and a second deflecting mirror 6;

the laser is reflected to a second fixed reflector 3 through a first fixed reflector 2, and the second fixed reflector 3 reflects the laser to a light beam conversion device 4; after the light beam conversion device 4 converts the laser, the output laser is reflected to the second deflection reflector 6 through the first deflection reflector 5, and the second deflection reflector 6 is arranged to reflect the laser to the laser output port 12.

More specifically, the incident angle and the exit angle of the laser light at the first fixed mirror 2 and the incident angle and the exit angle at the second fixed mirror 3 are approximately 45 °, respectively, and the incident angle and the exit angle of the laser light at the first deflecting mirror 5 and the incident angle and the exit angle at the second deflecting mirror 3 are approximately 45 °, respectively.

Referring to fig. 3, a transmission path of the laser light is shown in fig. 3. Laser emitted by the laser 200 enters from the laser input port 11, is transmitted to the first fixed reflector 2, is deflected by about 90 ° by the first fixed reflector 2, is reflected to the second fixed reflector 3, is deflected by about 90 ° by the second fixed reflector 3, is transmitted to the light beam conversion device 4, is subjected to light beam conversion by the light beam conversion device 4, is transmitted to the first deflection reflector 5, is deflected by about 90 ° by the first deflection reflector 5, is reflected to the second deflection reflector 6, is reflected to the laser output port 12 by the second deflection reflector 6, and is coupled to a component connected to the laser output port 12, for example, the laser output port 12 is connected to the transmission optical fiber 15 connected by the laser coupler 14.

In the embodiment, the optical path is bent by the fixed reflector and the deflection reflector, so that the length of the laser adapter can be reduced, and various optical devices can be conveniently arranged.

It will be appreciated that the arrangement of the fixed and deflecting mirrors is not limited to that described above, and that other arrangements are possible.

In one embodiment, at least one laser power meter 8 is provided within the housing 1 for detecting the power of the laser light entering the laser adapter. The laser power meter 8 can detect the power change of the laser in real time, so that whether the laser transmission has a problem or not can be judged, and particularly whether the input end of the laser has a problem or not can be judged, for example, whether the laser is damaged or not or whether the laser is blocked or not can be judged.

Alternatively, the laser power meter 8 is disposed near the laser output port 12, and can detect the power of the laser output from the laser adapter.

As shown in fig. 1, a beam splitter 9 is disposed on the laser transmission path, a part of the laser beam can be reflected to a laser power meter 8 by the beam splitter 9, and the laser power meter 8 can obtain the power of the laser by detecting the beam split.

Optionally, the at least one laser power meter includes a first laser power meter positioned proximate to the laser input port 11 and a second laser power meter positioned proximate to the laser output port 12. That is, the power at the time of laser input is detected by the first laser power meter, the power at the time of laser output is detected by the second laser power meter, and by detecting a change in the power at the time of laser input, it is possible to determine whether a problem has occurred in the laser input, for example, whether the laser is damaged or not, or whether the laser is blocked or not. The first laser power meter and the second laser power meter detect the power of the laser when the laser is input and output respectively, so that the power change of the laser when the laser is output compared with that when the laser is input can be compared, and the power loss of the laser in the laser adapter can be judged.

In one embodiment, the laser adapter further comprises a switch device 10 arranged at the laser input port 11, wherein the switch device 10 comprises a switch door for opening and closing the laser input port 11 and a door driving mechanism for driving the switch door to switch between an opening state and a closing state;

when the switch door is opened, laser can enter the laser adapter for transmission, and when the switch door is closed, the laser is blocked from entering the laser adapter.

The door drive mechanism may be controlled by a control unit, which sends a control signal, and the drive circuit 9 may control the door drive mechanism to drive the opening and closing of the door.

In addition, a supporting leg 13 can be further arranged below the shell 1 of the laser adapter 100, the supporting leg 13 is arranged to be height-adjustable, and the height of the supporting leg 13 is adjusted, so that the laser input port 11 can be matched with the height of the laser, and the laser can accurately emit laser to the laser input port 11.

The height of the supporting leg 13 can be adjusted by the existing common technique, for example, by setting an adjusting bolt to adjust the height of the supporting leg 13, or by setting the supporting leg to comprise two parts, and adjusting the height by connecting the two parts at different height positions.

According to another aspect of the present application, there is also provided an optical system, as shown in fig. 3, comprising a laser 200, a transmission fiber 15, an application device body 300, and a laser adapter 100 according to the above; the application apparatus body 300 may be an apparatus that operates by laser light, such as a two-photon microscope.

Wherein, the laser 200 is arranged at the laser input port 11 of the laser adapter 100 for emitting laser to the laser input port 11; one end of the transmission fiber 15 is connected to the laser coupler 14, the laser coupler 14 is connected to the laser output port 11, and the other end of the transmission fiber 15 is connected to the application device main body 300.

The optical system provided by the application enables laser to be stably coupled to the transmission optical fiber 15 through the laser adapter 100, and then is transmitted to the application device main body 300 through the transmission optical fiber 15, and can adjust the laser with various parameters emitted by the laser 200 to be matched with the application device main body 300, so that the application device main body 300 is not affected by parameter change of the laser 200 or distance change between the laser 200 and the laser adapter 100, therefore, optical devices on an optical path do not need to be replaced or the whole optical path is adjusted, and the use is very convenient.

The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents and the like that are within the spirit and scope of the present application should be included.

Claims (10)

1. A laser adapter, comprising: the light beam conversion device and the light beam stabilizing device are arranged in the shell; wherein,

the shell is provided with a laser input port and a laser output port;

the light beam conversion device is arranged for converting the laser light beam entering the shell;

the light beam stabilizing device is arranged at the downstream of the light beam conversion device along the laser transmission direction and is used for adjusting the laser transmission direction so as to correct the deviation of the actual position and the ideal position of the laser beam at the laser output port.

2. The laser adapter of claim 1, wherein the beam stabilizing device comprises: the device comprises a position detector, at least one deflection mirror and a mirror adjusting mechanism connected with each deflection mirror;

the position detector is arranged at a position close to the laser output port and used for detecting the position information of the laser at the laser output port;

the reflector adjusting mechanism is arranged to drive the deflection reflector to deflect according to the position information detected by the position detector so as to adjust the laser transmission direction.

3. The laser adapter according to claim 2, further comprising a control unit that receives positional information detected by the position detector and controls the mirror adjustment mechanism according to the positional information.

4. The laser adapter according to claim 2, wherein the laser adapter further comprises at least one fixed mirror for changing the laser transmission direction, the fixed mirror being disposed upstream of the beam changing device in the laser transmission direction.

5. The laser adapter of claim 4, wherein the at least one fixed mirror comprises a first fixed mirror and a second fixed mirror, and the at least one deflecting mirror comprises a first deflecting mirror and a second deflecting mirror;

the laser is reflected to the second fixed reflector through the first fixed reflector, and the second fixed reflector reflects the laser to the light beam transformation device; the laser emitted by the light beam conversion device is reflected to the second deflection reflector through the first deflection reflector, and the second deflection reflector is arranged to reflect the laser to the laser output port.

6. The laser adapter according to claim 1, wherein at least one laser power meter is disposed within the housing for detecting the power of the laser light entering the laser adapter.

7. The laser adapter as claimed in claim 6, wherein said at least one laser power meter includes a first laser power meter and a second laser power meter, said first laser power meter being disposed proximate to said laser input port and said second laser power meter being disposed proximate to said laser output port.

8. The laser adapter according to any one of claims 1-7, further comprising a switch device disposed at the laser input port, the switch device comprising a switch door for opening and closing the laser input port and a door driving mechanism for driving the switch door to switch between an open state and a closed state;

when the switch door is opened, the laser can enter the laser adapter for transmission, and when the switch door is closed, the laser is blocked from entering the laser adapter.

9. Laser adapter according to any of claims 1-7, characterized in that support legs are arranged below the housing, which support legs are arranged height-adjustably.

10. An optical system comprising a laser, a transmission fiber, an application device body, and a laser adapter according to any one of claims 1-9; wherein,

the laser is arranged at a laser input port of the laser adapter and used for emitting laser to the laser input port;

one end of the transmission optical fiber is connected with a laser coupler, the laser coupler is connected with the laser output port, and the other end of the transmission optical fiber is connected with the application equipment main body.

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