Beam splitter and optical power monitoring system

Abstract

The light splitting sheet provided by the utility model comprises an anti-reflection layer and a reflection inhibition layer, and the anti-reflection layer is located at the emergent surface side of the light splitting sheet and is used for reducing light reflection of incident light entering the light splitting sheet; and a reflection suppression layer located on a reflection path of the reflected light reflected by the anti-reflection layer for suppressing the reflected light reflected by the anti-reflection layer. According to the beam splitter, the incident light can be split, and meanwhile, polarization dependent loss and waveguide dispersion loss caused by reflected light are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of optoelectronics, in particular to a spectrometer and an optical power monitoring system. Background Art

[0002] A beam splitter is an optical component used to split a light beam into different wavelengths or directions for applications such as spectral analysis, optical measurement, and optical signal processing.

[0003] Since beamsplitters are usually made of optical glass or optical film, light reflection is inevitable during the application of beamsplitters. Therefore, traditional large-angle beamsplitters may introduce polarization dependent loss (PDL) during the beam splitting process, causing the polarization state of the output light beam to change, and may introduce waveguide dispersion loss (WDL) during the transmission of light. Utility Model Content

[0004] The present invention provides a beam splitter and an optical power monitoring system, which can split incident light while reducing polarization dependent loss (PDL) and waveguide dispersion loss (WDL) caused by reflected light. The beam splitter is as follows:

[0005] The beam splitter comprises an anti-reflection layer and a reflection suppression layer;

[0006] The anti-reflection layer is located on the exit surface side of the beam splitter, and is used to reduce the reflection of the incident light entering the beam splitter;

[0007] The reflection suppression layer is located on a reflection path of the reflected light reflected by the anti-reflection layer, and is used for suppressing the reflected light reflected by the anti-reflection layer.

[0008] In a possible implementation manner, the thickness of the beam splitter is such that the reflection suppression layer is located on a reflection path of the reflected light reflected by the anti-reflection layer.

[0009] In a possible implementation manner, the reflection suppression layer is a diffuse reflection layer.

[0010] In a possible implementation manner, the diffuse reflection layer is a frosted target surface in the beam splitter; the target surface is located on a reflection path of the reflected light from the exit surface.

[0011] In a possible implementation manner, the diffuse reflection layer is a target surface of the beam splitter to which a diffuse reflection material is attached; the target surface is located on a light path of the reflected light from the exit surface.

[0012] In a possible implementation manner, the reflection suppression layer is a light absorption layer.

[0013] In a possible implementation manner, the light absorbing layer is a target surface of the beam splitter to which a light absorbing material is attached.

[0014] In a possible implementation manner, the reflection suppression layer is a diffuse reflection layer to which a light absorbing material is attached.

[0015] In a possible implementation, the anti-reflection layer is an anti-reflection coating (AR coating).

[0016] In a possible implementation, the beam splitter further includes a beam splitter layer, which is located on the incident surface side of the beam splitter and is used to change the light path of part of the incident light.

[0017] In a possible implementation manner, the beam splitting layer is a beam splitting film attached to the incident surface of the beam splitter.

[0018] In a possible implementation, the beam splitting film is a non-polarizing reflective film NPR film.

[0019] In a possible implementation manner, the beam splitting layer is a layer structure with a beam splitting function integrated at the incident surface of the beam splitter.

[0020] In a possible implementation manner, the beam splitter includes the incident surface, the exit surface, and a bottom surface located between the incident surface and the exit surface, and the reflection suppression layer is located on the bottom surface.

[0021] In a possible implementation manner, the incident surface and the exit surface are parallel to each other.

[0022] In a possible implementation, the cross section of the beam splitter is a parallelogram, the incident surface and the exit surface correspond to two oblique sides of the parallelogram respectively, and the reflection suppression layer corresponds to the bottom surface of the parallelogram.

[0023] In a possible implementation manner, the beam splitter has a beam splitting parameter, and the beam splitting parameter is used to adjust the beam splitting capability of the beam splitter.

[0024] In a possible implementation manner, the beam splitting parameter includes at least one of the following: the material of the beam splitter, the grating structure of the beam splitter, the type and thickness of the material attached to the surface of the beam splitter, and the incident angle of the beam splitter.

[0025] On the other hand, an optical power monitoring system is provided, the system comprising the beam splitter, incident light module and monitoring module as described in any one of the above items;

[0026] The incident light module is used to generate multi-channel incident light;

[0027] The beam splitter is arranged behind the incident light module and is used to change the light path of part of the incident light;

[0028] The monitoring module is arranged on the reflection path of a part of the incident light reflected by the beam splitter, and is used for performing multi-channel optical power monitoring.

[0029] In a possible implementation, the monitoring module includes a lens array and a photoelectric sensor array;

[0030] The lens array is used to transmit the light reflected by the beam splitter to the photoelectric sensor array to perform multi-channel optical power monitoring.

[0031] The technical solution provided by the utility model may have the following beneficial effects:

[0032] The beam splitter provided by the embodiment of the utility model can reduce the occurrence of light reflection inside the beam splitter and reduce the light interference caused by further reflection, thereby reducing polarization-related loss and waveguide dispersion loss caused by reflected light while achieving splitting of the incident light, by arranging an anti-reflection layer on the output surface side of the beam splitter to reduce light reflection of incident light, and arranging a reflection suppression layer on the reflection path of the reflected light reflected by the anti-reflection layer to suppress the reflected light. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the description, are used to explain the principles of the present application.

[0034] Figure 1 A schematic structural diagram of a beam splitter provided by an exemplary embodiment of the present application is shown;

[0035] Figure 2 A schematic structural diagram of a beam splitter provided by an exemplary embodiment of the present application is shown;

[0036] Figure 3 A schematic diagram of the structure of an optical power monitoring system in the related art is shown;

[0037] Figure 4 A schematic structural diagram of an optical power monitoring system provided by an exemplary embodiment of the present application is shown. DETAILED DESCRIPTION

[0038] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples of structures consistent with some aspects of the utility model as detailed in the attached claims.

[0039] It should be understood that the "several" mentioned in this article refers to one or more, and "multiple" refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0040] The utility model provides a spectrometer, which can be used in an optoelectronic system to split a light beam input to the spectrometer into light beams of different wavelengths or directions, and reduce polarization-related loss and waveguide dispersion loss caused by reflected light during use. The spectrometer involved in the utility model will be introduced in detail in conjunction with the accompanying drawings.

[0041] Figure 1 FIG. 4 shows a schematic diagram of the structure of a beam splitter provided by an exemplary embodiment of the present application. Figure 1 As shown, the beam splitter 110 includes an anti-reflection layer 101 and a reflection suppression layer 102;

[0042] The anti-reflection layer 101 is located on the exit surface side of the beam splitter 110 and is used to reduce the reflection of the incident light entering the beam splitter 110;

[0043] The reflection suppression layer 102 is located on a reflection path of the reflected light reflected by the anti-reflection layer 101 , and is used to suppress the reflected light reflected by the anti-reflection layer 101 .

[0044] Based on the transmission path of light through the beam splitter, the planes in the beam splitter can be named as the incident surface and the exit surface; the incident surface refers to the surface of the beam splitter where the light enters the beam splitter from the external medium; the exit surface refers to the surface of the beam splitter where the light leaves the beam splitter and enters the external medium. The incident surface of the beam splitter 110 is used to realize the beam splitting function of the beam splitter; in the embodiment of the utility model, in order to reduce the loss caused by the reflection of light inside the beam splitter, an anti-reflection layer 101 is arranged on the exit surface side of the beam splitter 110, and the anti-reflection layer 101 can reduce the reflection of the light entering the beam splitter 110; further, although the anti-reflection layer 101 can reduce the reflection of light, it is still impossible to completely avoid the reflection of light. A small part of the light reflection may occur on the exit surface side of the beam splitter 110, that is, there is reflected light reflected by the anti-reflection layer 101. In order to reduce the interference of this part of the reflected light on the light path of other light and reduce the loss, a reflection suppression layer 102 is arranged on the reflection path of the reflected light of the anti-reflection layer 101, and the reflection suppression layer 102 is used to suppress the reflected light reflected by the anti-reflection layer 101.

[0045] In summary, the beam splitter provided in the embodiment of the utility model can reduce the occurrence of light reflection inside the beam splitter and reduce the light interference caused by further reflection, by arranging an anti-reflection layer on the output surface side of the beam splitter to reduce the light reflection of the incident light, and arranging a reflection suppression layer on the reflection path of the reflected light reflected by the anti-reflection layer to suppress the reflected light. This can reduce the occurrence of light reflection inside the beam splitter and reduce the light interference caused by further reflection, thereby achieving the splitting of the incident light while reducing the polarization-related loss and waveguide dispersion loss caused by the reflected light.

[0046] Figure 2 FIG. 4 shows a schematic diagram of the structure of a beam splitter provided by an exemplary embodiment of the present application. Figure 2 As shown, the beam splitter 110 includes an anti-reflection layer 101 and a reflection suppression layer 102;

[0047] The anti-reflection layer 101 is located on the exit surface side of the beam splitter 110 and is used to reduce the reflection of the incident light entering the beam splitter 110;

[0048] The reflection suppression layer 102 is located on a reflection path of the reflected light reflected by the anti-reflection layer 101 , and is used to suppress the reflected light reflected by the anti-reflection layer 101 .

[0049] In the embodiment of the utility model, the beam splitter 110 comprises an incident surface, an exit surface and a bottom surface between the incident surface and the exit surface, and the reflection suppression layer 102 is located on the bottom surface; wherein the incident surface and the exit surface are parallel to each other. The thickness of the beam splitter 110 is such that the reflection suppression layer 102 is located on the reflection path of the reflected light reflected by the anti-reflection layer 101; schematically, as shown Figure 2As shown, the reflection suppression layer 102 may be disposed on the bottom surface between the incident surface and the emitting surface of the beam splitter 110 .

[0050] In one possible implementation, Figure 2 As shown, the cross section of the beam splitter 110 is a parallelogram, the incident surface and the output surface correspond to the two oblique sides of the parallelogram respectively, and the reflection suppression layer corresponds to the bottom surface of the parallelogram.

[0051] It should be noted that the beam splitter 110 can be implemented as a cube of various shapes, and its corresponding cross-section can have various forms, such as square or rectangular, circular, prism-shaped, cylindrical and other custom shapes, etc. Therefore, the shape setting of the reflection suppression layer 102 can be adapted to the shape setting of the corresponding plane of the beam splitter 110. For example, when the beam splitter 110 is a cylinder, if the incident surface and the exit surface are both circular planes of the cylinder, then the reflection suppression layer 102 can be set on the side of the cylinder and be consistent with the side shape of the cylinder.

[0052] In the embodiment of the present utility model, the reflection suppression layer 102 is a diffuse reflection layer; Figure 2 As shown, the diffuse reflection layer (reflection suppression layer 102) reflects the reflected light reflected by the anti-reflection layer 101 irregularly based on the principle of diffuse reflection of light, reducing the intensity of the reflected light, thereby reducing the interference of the reflected light on other light. In this case, in a possible implementation, the reflection suppression layer 102 is a frosted target surface in the beam splitter 110; the target surface is located on the reflection path of the reflected light from the exit surface. Schematically, the target surface can be Figure 2 As shown in the plane between the exit surface and the incident surface, during the manufacturing process of the beam splitter 110, the target surface can be frosted by a frosting process so that the target surface has a diffuse reflection function, thereby realizing diffuse reflection of the light reaching the target surface and achieving the effect of light suppression; in another possible implementation method, the reflection suppression layer 102 can be a target surface with a diffuse reflection material attached, for example, the diffuse reflection material is plated on the target surface to form a reflection suppression layer, or the diffuse reflection material is pasted on the target surface to form a reflection suppression layer, etc. The present application does not limit the process method of attaching the diffuse reflection material to the target surface; wherein, the diffuse reflection material refers to a material that can evenly scatter light in all directions, such as a powdered material, a capillary material, an atomized material, a matte material, and some polymer materials, etc.

[0053] Optionally, the reflection suppression layer 102 may also be a light absorption layer, which absorbs the reflected light reflected by the anti-reflection layer 101 based on the material's light energy absorption characteristics, thereby avoiding further reflection of the reflected light. In this case, the light absorption layer may be a target surface of the beam splitter 110 to which a light absorbing material is attached, and the light suppression effect is achieved by absorbing the light reaching the target surface. The light absorbing material refers to a material that can effectively absorb light energy, such as black materials including black paint, carbon black, etc., light absorbers, nanomaterials, etc.; the process of attaching the light absorbing material to the target surface may include but is not limited to plating, pasting, etc., and the present application does not limit this.

[0054] In another possible implementation, the reflection suppression layer 102 can be a diffuse reflection layer with a light absorbing material attached thereto, that is, the reflection suppression layer 102 can use the principles of diffuse reflection and light absorption to suppress reflected light reflected from the non-incident surface side to enhance the light suppression effect.

[0055] The anti-reflection layer 101 is an optical coating that increases the transmittance of light by reducing the reflection of light. In a possible implementation, the anti-reflection layer 101 is an anti-reflective coating (ARcoating), also known as an anti-reflection film. It is understandable that the anti-reflection layer 101 can also be implemented in other forms with the same or similar functions, such as a nanostructured anti-reflection coating that achieves minimum reflection of light in a specific wavelength range by controlling the shape and distribution of the nanostructure, etc., and the present application does not limit this.

[0056] In the embodiment of the utility model, the beam splitter 110 further includes a beam splitter layer 103 , which is located on the incident surface side of the beam splitter 110 and is used to change the light path of part of the incident light. That is, the beam splitter 110 realizes the beam splitting function through the beam splitter layer 103 .

[0057] In a possible implementation, the beam splitting layer 103 is a beam splitting film attached to the incident surface; the process of attaching the beam splitting film to the incident surface may include but is not limited to plating, pasting, etc., and the present application does not limit this.

[0058] Optionally, the diaphragm film may be an NPR film (Non-Polarizing Reflectors) having a non-polarizing property; or, the diaphragm film may also be implemented as other film structures having a diaphragm function, which is not limited in the present application.

[0059] The beam splitter 110 has a beam splitting parameter, which is used to adjust the beam splitting ability of the beam splitter, wherein the beam splitting parameters of the beam splitter include but are not limited to the material of the beam splitter, the grating structure of the beam splitter, the material and thickness of the surface coating of the beam splitter, and the incident angle of the beam splitter (for example, the incident angle of the beam splitter can be set to 13.5°, 22.5°, 45°, and any other optional degrees), etc. The amount of light split by the beam splitter can be adjusted by setting the above-mentioned beam splitting parameters.

[0060] In another possible implementation, the beam splitting layer 103 is a layer structure with a beam splitting function integrated at the incident surface of the beam splitter 110 ; that is, the beam splitting function is a material property of the beam splitter 110 itself.

[0061] To summarize, the beam splitter provided by the embodiment of the utility model can reduce the occurrence of light reflection inside the beam splitter and reduce light interference caused by further reflection while realizing the beam splitting function, thereby realizing the beam splitting of the incident light and reducing the polarization-related loss and waveguide dispersion loss caused by the reflected light while realizing the beam splitting of the incident light.

[0062] The spectrometer provided in the embodiment of the utility model can be applied in various optoelectronic systems / application scenarios, such as spectral analysis systems, optical communication systems, optical imaging systems, optical power monitoring systems, etc. The embodiment of the utility model does not limit the application of the spectrometer.

[0063] Taking the optical power monitoring system as an example, in the related technology, a coupler is usually used to separate 1% or 2% of the light for optical power monitoring. Figure 3 The structure diagram of the optical power monitoring system in the related art is shown as follows: Figure 3As shown, the optical power monitoring system includes a connector 310, a coupler 320, a monitoring optical path 330 and other components; the connector 310 and the coupler 320 are connected by an optical fiber for light transmission, and after passing through the coupler 320, the light passes through a two-dimensional focal array (2DFA, Two-Dimensional Focal Array) and a lens array in sequence to allow the light to propagate in the air; wherein the connector 310 is used to transmit light, and the coupler 320 is used to separate 1% or 2% of the light and transmit it to the monitoring optical path 330, so that the monitoring optical path 330 performs optical power monitoring based on the received light; in the above optical power monitoring system, when monitoring multi-channel optical signals, it is necessary to configure a coupler that is consistent with the number of optical signal channels, so that the optical power monitoring system built based on the coupler has the problems of large size and high loss. The present utility model embodiment schematically provides an application such as Figure 1 or Figure 2 The optical power monitoring system of the beam splitter shown in the figure can reduce the overall size of the system while utilizing the property of the beam splitter to reduce loss, and solve the problem of the influence of reflected light on optical power monitoring caused by the introduction of the beam splitter; Figure 4 FIG. 4 shows a schematic diagram of the structure of an optical power monitoring system provided by an exemplary embodiment of the present application. Figure 4 As shown, the system includes a beam splitter 110, an incident light module 120 and a monitoring module 130;

[0064] The incident light module 120 is used to generate multi-channel incident light;

[0065] The beam splitter 110 is disposed behind the incident light module 120 and includes a beam splitter layer and a reflection suppression layer; the beam splitter layer is used to change the light path of part of the incident light; the reflection suppression layer is used to suppress the reflected light reflected toward the inside of the beam splitter 110;

[0066] The monitoring module 130 is disposed on the path of a portion of the incident light that is changed by the beam splitter 110 , and is used to perform multi-channel optical power monitoring.

[0067] Furthermore, in another possible implementation, the optical power monitoring system includes a beam splitter 110, an incident light module 120, and a monitoring module 130;

[0068] The incident light module 120 is used to generate multi-channel incident light;

[0069] The beam splitter 110 is disposed after the incident light module 120 and is used to change the light path of part of the incident light;

[0070] The monitoring module 130 is disposed on a reflection path of a portion of the incident light reflected by the beam splitter 110 , and is used for performing multi-channel optical power monitoring.

[0071] The beam splitter 110 is as follows: Figure 1 or Figure 2 The beam splitter shown in any embodiment will not be described in detail here.

[0072] The incident light module 120 may be composed of a two-dimensional focal array and a lens array, so that the light is transmitted in the air instead of being transmitted in the optical fiber, thereby generating a multi-channel incident light that can be transmitted to the beam splitter 110. The beam splitter 110 changes the light path of part of the incident light to perform optical power monitoring based on this part of the light; the monitoring module 130 is configured on the transmission path of the light whose light path is changed by the beam splitter 110, that is, the reflection of the part of the incident light reflected by the beam splitter 110, and after receiving the part of the incident light reflected on the incident surface side by the beam splitter 110, multi-channel optical power monitoring is performed.

[0073] In one possible implementation, the monitoring module 130 may be composed of a lens array, a two-dimensional focal array, and a photodiode array configured in sequence, and the two-dimensional focal array and the photodiode array are connected by optical fiber to achieve monitoring of optical power; in another possible implementation, the monitoring module 130 may be composed of a lens array and a photodiode array, so that light is concentrated into the photodiode array through the lens array to achieve monitoring of optical power.

[0074] Since the beam splitter 110 is provided with the reflection suppression layer 102, the light reflected by the anti-reflection layer 101 can be suppressed, thereby reducing the light reflected from the non-incident surface to the monitoring module 130, reducing the impact on optical power monitoring, and improving the optical power monitoring effect.

[0075] In summary, the optical power monitoring system provided by the embodiment of the utility model is based on a spectrometer including an anti-reflection layer arranged on the output surface side for reducing the reflection of incident light, and a reflection suppression layer arranged on the reflection path of the reflected light reflected by the anti-reflection layer for suppressing the reflected light to construct the optical power monitoring system, and a monitoring module is arranged on the transmission path of the reflected light reflected by the incident surface side of the spectrometer to perform multi-channel optical power monitoring. While reducing the polarization-related loss and waveguide dispersion loss caused by the reflected light, it also reduces the influence of the reflected light reflected from the non-incident surface on the optical power monitoring, thereby improving the effect of optical power monitoring.

[0076] Those skilled in the art will readily appreciate other solutions of the present application after considering the specification and practicing the utility model disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art that are not disclosed in the present application. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0077] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A beam splitter, characterized in that: The beam splitter (110) comprises an anti-reflection layer (101) and a reflection suppression layer (102); The anti-reflection layer (101) is located on the exit surface side of the beam splitter (110) and is used to reduce the reflection of incident light entering the beam splitter (110); The reflection suppression layer (102) is located on a reflection path of the reflected light reflected by the anti-reflection layer (101), and is used to suppress the reflected light reflected by the anti-reflection layer (101).

2. The beam splitter according to claim 1, characterized in that: The thickness of the beam splitter (110) enables the reflection suppression layer (102) to be located on the reflection path of the reflected light reflected by the anti-reflection layer (101).

3. The beam splitter according to claim 2, characterized in that: The reflection suppression layer (102) is a diffuse reflection layer.

4. The beam splitter according to claim 3, characterized in that: The diffuse reflection layer is a frosted target surface in the beam splitter (110); the target surface is located on the reflection path of the reflected light from the exit surface.

5. The beam splitter according to claim 3, characterized in that: The diffuse reflection layer is a target surface of the beam splitter to which diffuse reflection material is attached; the target surface is located on the light path of the reflected light from the exit surface.

6. The beam splitter according to claim 2, characterized in that: The reflection suppression layer (102) is a light absorbing layer.

7. The beam splitter according to claim 6, characterized in that: The light absorbing layer is a target surface of the beam splitter (110) to which a light absorbing material is attached.

8. The beam splitter according to claim 3, characterized in that: The reflection suppression layer (102) is a diffuse reflection layer with a light absorbing material attached thereto.

9. The beam splitter according to claim 1, characterized in that: The anti-reflection layer (101) is an anti-reflection coating.

10. The beam splitter according to claim 1, characterized in that: The beam splitter (110) further comprises a beam splitter layer (103), wherein the beam splitter layer (103) is located on the incident surface side of the beam splitter (110) and is used to change the light path of a portion of the incident light.

11. The beam splitter according to claim 10, characterized in that: The beam splitting layer (103) is a beam splitting film attached to the incident surface of the beam splitter (110).

12. The beam splitter according to claim 11, characterized in that: The beam splitting film is a non-polarizing reflective film.

13. The beam splitter according to claim 10, wherein the beam splitting layer (103) is a layer structure with a beam splitting function integrated at the incident surface of the beam splitter (110).

14. The beam splitter according to claim 1, characterized in that: The beam splitter (110) comprises an incident surface, an exit surface, and a bottom surface located between the incident surface and the exit surface, and the reflection suppression layer (102) is located on the bottom surface.

15. The beam splitter according to claim 1 or 14, characterized in that: The incident surface and the exit surface are parallel to each other.

16. The beam splitter according to claim 15, characterized in that: The cross section of the beam splitter (110) is a parallelogram, the incident surface and the exit surface correspond to the two oblique sides of the parallelogram respectively, and the reflection suppression layer (102) corresponds to the bottom surface of the parallelogram.

17. The beam splitter according to claim 1, characterized in that: The beam splitter (110) has a beam splitting parameter, and the beam splitting parameter is used to adjust the beam splitting capability of the beam splitter.

18. The beam splitter according to claim 17, characterized in that: The beam splitting parameters include at least one of the following: the material of the beam splitter, the grating structure of the beam splitter, the type and thickness of the material attached to the surface of the beam splitter, and the incident angle of the beam splitter.

19. An optical power monitoring system, characterized in that: The system comprises the beam splitter (110) according to any one of claims 1 to 9, an incident light module (120) and a monitoring module (130); The incident light module (120) is used to generate multi-channel incident light; The beam splitter (110) is arranged behind the incident light module (120) and is used to change the light path of part of the incident light; The monitoring module (130) is arranged on the reflection path of a portion of the incident light reflected by the beam splitter (110) and is used for performing multi-channel optical power monitoring.

20. The optical power monitoring system according to claim 19, characterized in that: The monitoring module (130) comprises a lens array and a photoelectric sensor array; The lens array is used to transmit the light reflected by the beam splitter to the photoelectric sensor array to perform multi-channel optical power monitoring.

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