Variable optical attenuator, optical signal processing method and electronic equipment

Abstract

The invention discloses a variable optical attenuator, an optical signal processing method and electronic equipment, and the variable optical attenuator comprises an optical signal adjusting assembly which is used for adjusting the light intensity of a to-be-adjusted first optical signal, the optical signal adjusting assembly comprises an MEMS rotating mirror and a linear attenuator, the linear attenuator is located between an input optical fiber and an output optical fiber, and the MEMS rotating mirror is used for adjusting the light intensity of the to-be-adjusted first optical signal; the first optical signal is an optical signal input by an input optical fiber, and the MEMS rotating mirror is used for adjusting the position of the first optical signal on the linear attenuator; the optical lens assembly comprises a lens and a reflecting mirror, and the optical path between the optical lens assembly and the optical signal adjusting assembly is kept coherent; a second optical signal obtained after the first optical signal is adjusted by the variable optical attenuator is output by the output optical fiber, and the first optical signal and the second optical signal are single-mode optical fibers or multimode optical fibers. By applying the variable optical attenuator provided by the invention, the uniform attenuation of the optical signal of the multimode optical fiber is realized, and the integrity of the optical signal is kept.

Description

Technical Field

[0001] The present application relates to the field of optical fiber communication technology, and in particular to a variable optical attenuator, an optical signal processing method and an electronic device. Background Art

[0002] VOA (Variable Optical Attenuator) is an important component of fiber-optic communication networks. VOA can control the power of optical signals by changing the attenuation degree of optical signals. With the development of MEMS (Micro-Electro-Mechanical Systems) technology, VOA has gradually developed into a MEMS-based angle offset design. MEMS-based VOA can also control the amount of light coupled to the output optical fiber by adjusting the angle of the MEMS mirror, thereby achieving the purpose of controlling the power of the optical signal. However, the current MEMS-based VOA has a good control effect under single-mode optical fiber, but when applied to multi-mode optical fiber scenarios, the angle offset causes uneven attenuation of light in different transverse modes in the multi-mode optical fiber, causing signal distortion. Summary of the invention

[0003] In order to solve the technical problem in the above-mentioned prior art that the angle deviation of the MEMS-based VOA in the multimode optical fiber scenario causes uneven attenuation of light in different modes and thus causes signal distortion, the embodiments of the present application provide a variable optical attenuator, an optical signal processing method and an electronic device.

[0004] On one hand, the present application provides a variable optical attenuator, comprising:

[0005] An optical signal adjustment component, used for adjusting the optical intensity of a first optical signal to be adjusted, the optical signal adjustment component comprising a MEMS rotating mirror and a linear attenuator, the linear attenuator being located between an input optical fiber and an output optical fiber, the first optical signal being an optical signal input by the input optical fiber, and the MEMS rotating mirror being used for adjusting the position of the first optical signal on the linear attenuator;

[0006] An optical mirror assembly, wherein the optical mirror assembly comprises a lens and a reflector, and the optical path between the optical mirror assembly and the optical signal adjustment assembly is kept coherent;

[0007] The second optical signal obtained after the variable optical attenuator adjusts the first optical signal is output by the output optical fiber, and the first optical signal and the second optical signal are single-mode optical fibers or multi-mode optical fibers.

[0008] In one possible implementation manner, the MEMS rotating mirror is located between the input optical fiber and the linear attenuator, and is specifically used to control and adjust the position of the first optical signal propagating to the linear attenuator.

[0009] In one embodiment, the optical mirror assembly includes:

[0010] a collimating lens, located between the input optical fiber and the optical signal conditioning assembly;

[0011] A scanning lens is located between the MEMS rotating mirror and the linear attenuator, and the front focus of the scanning lens is located at the rotation axis position of the MEMS rotating mirror;

[0012] The first reflecting mirror is located after the linear attenuator and at the rear focus of the scanning lens.

[0013] In one possible implementation manner, the linear attenuator is located between the first reflector and the scanning lens; the attenuation of the optical signal by the linear attenuator satisfies the following formula:

[0014] P out =P in (1-kY)

[0015] Among them, P out Characterizes the output optical power of the linear attenuator, P out The unit is dB, P in Characterizes the input optical power of the linear attenuator, k is the preset attenuation coefficient, Y is the position of the light spot of the optical signal on the linear attenuator, and the zero point of Y corresponds to the maximum or minimum position of the rotation angle of the MEMS mirror.

[0016] In one possible implementation, the first reflector is a right-angle reflective prism.

[0017] In one embodiment, the variable optical attenuator further includes:

[0018] The control component is used to control and adjust the rotation angle of the MEMS rotating mirror based on a control signal.

[0019] In one embodiment, the variable optical attenuator further includes:

[0020] An optical circulator, wherein the first port of the optical circulator is used to receive the input first optical signal, and the second port of the optical circulator is used to send the first optical signal into the attenuation optical system, and make the light reflected by the first reflector pass through the attenuation optical system again to form the second optical signal.

[0021] Another aspect of the present application provides a variable optical attenuator, comprising:

[0022] A variable optical attenuator, comprising: an optical signal adjustment component and an optical mirror component;

[0023] The optical signal adjustment component is used to adjust the intensity of the first optical signal to be adjusted, the optical signal adjustment component includes a MEMS rotating mirror and a linear attenuator, the linear attenuator is located between the input optical fiber and the output optical fiber, the first optical signal is the optical signal input by the input optical fiber, and the MEMS rotating mirror is used to adjust the position of the first optical signal on the linear attenuator;

[0024] The optical mirror assembly includes a lens and a reflector, and the optical mirror assembly and the optical signal adjustment assembly maintain an optical path connection;

[0025] The control component is used to control and adjust the rotation angle of the MEMS rotating mirror based on a control signal.

[0026] Another aspect of the present application provides a method for processing an optical signal, the method comprising:

[0027] If a variable optical attenuator is enabled, obtaining a first control signal, wherein the variable optical attenuator includes a MEMS rotating mirror, a linear attenuator, and an optical mirror assembly;

[0028] Based on the first control signal, a driving parameter for the variable optical attenuator is determined, and the driving parameter is used to provide a driving force for a control component of the variable optical attenuator to control the rotation of the MEMS mirror of the variable optical attenuator.

[0029] The variable optical attenuator, optical signal processing method and electronic device provided in the embodiments of the present application are used to attenuate the optical signal during its propagation process. The position of the optical signal on the linear attenuator is adjusted by controlling the components, thereby adjusting the intensity of the optical signal to achieve uniform attenuation of optical signals of various modes in the multimode optical fiber, thereby maintaining the integrity of the optical signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become readily understood. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, wherein:

[0031] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0032] Figure 1 A top view of a variable optical attenuator using a reflector and a circulator according to an embodiment of the present application;

[0033] Figure 2 A top view of a variable optical attenuator using a reflecting prism and a dual-fiber collimator according to an embodiment of the present application;

[0034] Figure 3A side view of a variable optical attenuator using a reflecting prism and a dual fiber collimator according to an embodiment of the present application.

[0035] See Figure 1 , the reference numerals include: an optical signal conditioning component 10 , an optical mirror component 20 , a MEMS rotating mirror 101 , a linear attenuator 102 , a collimating lens 201 , a scanning lens 202 , a first reflecting mirror 203 and an optical circulator 30 . DETAILED DESCRIPTION

[0036] In order to make the purpose, features, and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0037] In order to solve the technical problem that the angle deviation of the current MEMS-based VOA in the multimode optical fiber scenario causes uneven attenuation of light in different modes and thus causes signal distortion, the present application provides a variable optical attenuator, an optical signal processing method and an electronic device.

[0038] Figure 1 This is a top view of a variable optical attenuator using a reflector and a circulator according to an embodiment of the present application. Figure 1 As shown, the variable optical attenuator comprises:

[0039] An optical signal adjustment component 10, used for adjusting the intensity of a first optical signal to be adjusted, the optical signal adjustment component 10 comprises a MEMS rotating mirror and a linear attenuator, the first optical signal is an optical signal input by an input optical fiber;

[0040] An optical mirror assembly 20, wherein the optical mirror assembly 20 comprises a lens and a reflector, and the optical path between the optical mirror assembly 20 and the optical signal adjustment assembly is kept coherent;

[0041] The linear attenuator is located between the input optical fiber and the output optical fiber, and the MEMS rotating mirror is used to adjust the position of the first optical signal on the linear attenuator. The second optical signal obtained after the variable optical attenuator adjusts the first optical signal is output by the output optical fiber, and the first optical signal and the second optical signal can be transmitted in a single-mode optical fiber or a multi-mode optical fiber.

[0042] The variable optical attenuator provided in the embodiment of the present application is used to attenuate the optical signal during its propagation process, which can change the intensity of the output optical signal, achieve uniform attenuation of different mode signals of the multimode optical fiber, and maintain the integrity of the optical signal.

[0043] In the present disclosure, both the optical signal conditioning assembly 10 and the optical mirror assembly 20 may be packaged in a housing.

[0044] like Figure 1 As shown, in the present disclosure, the optical signal adjustment component 10 may include a MEMS mirror 101 and a linear attenuator 102. The MEMS mirror 101 is located between the input optical fiber and the linear attenuator, and is specifically used to adjust the position of the first optical signal propagating to the linear attenuator.

[0045] In the present disclosure, the MEMS mirror 101 reflects the input first optical signal so that the reflected optical signal enters the scanning lens 202 .

[0046] In the present disclosure, the variable optical attenuator may further include a control component, which is used to control and adjust the rotation angle of the MEMS rotating mirror based on a control signal. Optionally, the control component may drive the steering shaft of the MEMS rotating mirror to rotate through a first control signal to control the rotation of the MEMS rotating mirror.

[0047] In the present disclosure, the steering axis of the MEMS rotating mirror 101 is placed at the front focus of the scanning lens 202, and light at different angles will hit different positions on the linear attenuation sheet, resulting in different degrees of attenuation.

[0048] In this disclosure, Figure 1 As shown, the optical mirror assembly 20 may include:

[0049] The collimating lens 201 is located between the input optical fiber and the MEMS rotating mirror 10. The front focus of the collimating lens 201 is placed at the outlet of the input optical fiber.

[0050] The scanning lens 202 is located between the MEMS rotating mirror 101 and the linear attenuator 102, and the front focus of the scanning lens 202 is located at the rotation axis position of the MEMS rotating mirror 101. Optionally, the front focus of the scanning lens 202 is a position on the rotation axis of the MEMS rotating mirror. The front focus of the scanning lens 202 can also be a position on the mirror surface of the MEMS rotating mirror.

[0051] The first reflector 203 is located after the linear attenuator 102. Optionally, the first reflector 203 is located approximately at the back focus of the scanning lens 202.

[0052] In the present disclosure, the collimating lens 201 can collimate the light entering the attenuation optical system through the incident optical fiber, and after being reflected by the MEMS mirror, enter the scanning lens 202. The attenuation optical system is an optical system composed of various components of the variable optical attenuator.

[0053] In this disclosure, Figure 1As shown, the variable optical attenuator may further include:

[0054] The optical circulator 30 has a first port for receiving the first optical signal input, and a second port for sending the first optical signal into the attenuation optical system, and making the light reflected by the first reflector pass through the attenuation optical system again in the reverse direction to form the second optical signal. For details, see Figure 1 The first port of the optical circulator 30 receives the input first optical signal, and the second port of the optical circulator 30 inputs the first optical signal into the attenuation optical system. The collimating lens 201 collimates the input first optical signal, and the collimated optical signal is transmitted to the rotation axis of the MEMS rotating mirror 101. The optical signal is reflected by the MEMS rotating mirror 101 and transmitted to the scanning lens 202. The scanning lens 202 refracts the optical signal and transmits the optical signal to the linear attenuator 102. The optical signal is attenuated by the linear attenuator 102 and transmitted to the first reflector 203. The optical signal reflected back by the first reflector 203 passes through multiple components of the attenuation optical system (linear attenuator 102, scanning lens 202, MEMS rotating mirror 101 and collimating lens 201) in the reverse direction and is transmitted to the optical circulator 30. The optical circulator 30 outputs the optical signal, which is the second optical signal.

[0055] In the present disclosure, the scanning lens 202 refracts light incident at different angles to different positions on the linear attenuator 102, thereby obtaining different degrees of attenuation. Figure 1 As shown, the axis of rotation of the rotating mirror is located at the front focus of the scanning lens 202, and the optical signal enters the scanning lens 202 after being reflected by the MEMS rotating mirror 101. The scanning lens 202 refracts the MEMS rotating mirror at different angles to different positions on the linear attenuator 102. The light passing through different positions on the linear attenuator is attenuated to different degrees. After passing through the linear attenuator 102, the light enters the first reflector 203, and the focused light beam is reflected by the first reflector 203 and returns along the original path, passing through the linear attenuator 102, the scanning lens 202, the MEMS rotating mirror 101 and the optical circulator 30 again. The light comes out from the third port of the optical circulator 30 to form a second optical signal, which is the output light.

[0056] In the present disclosure, the first reflector 203 may be a right-angle reflective prism in combination with a dual-fiber collimator. This design does not require an optical circulator, and can reduce the loss of the device and the cost of the variable optical attenuator.

[0057] In this disclosure, Figure 1As shown, the linear attenuator 102 is located between the first reflector 203 and the scanning lens 202; the attenuation of the optical signal by the linear attenuator 102 is related to the position of the light spot. When the MEMS mirror 101 rotates, the light spot moves along the Y-direction on the linear attenuator 102 after the light passes through the scanning lens 202. The light intensity passing through the linear attenuator 102 and the light intensity entering the linear attenuator 102 satisfy the following formula:

[0058] P out =P in (1-kY)

[0059] Among them, P out Characterizes the output optical power of the linear attenuator 102, P out The unit is dB, P in Characterizes the input optical power of the linear attenuator 102, k is the preset attenuation coefficient, Y is the position of the light spot of the optical signal on the linear attenuator 102, and the zero point of Y corresponds to the maximum or minimum position of the rotation angle of the MEMS mirror, that is, the zero point of Y is usually at the corresponding position of the maximum or minimum rotation angle of the MEMS mirror on the linear attenuator.

[0060] In the present disclosure, the attenuation rate of the linear attenuator 102 to the optical signal varies with the position of the linear attenuator 102. For example, if the linear attenuator 102 has a width of 3 mm, a length of 10 mm (along the Y-direction), and a thickness of 1 mm, and the preset attenuation coefficient of the linear attenuator 102 is set to 2.5 dB / mm, when the light spot moves 10 mm on the attenuator, the attenuation can change from 0 dB to 25 dB.

[0061] like Figure 1 As shown, in another implementation scenario of the present application, the first port of the optical circulator 30 is used to receive input light, and the input light is transmitted to the MEMS mirror via the second port. After passing through the scanning lens and the linear attenuator in sequence, the reflected light is sent back via the first reflector, and passes through the linear attenuator, the scanning lens and the MEMS mirror again in reverse order. After returning to the second port of the optical circulator 30, it is guided to the third port of the optical circulator 30, and the second optical signal outputted from the third port of the optical circulator 30 is used as the output signal of the variable optical attenuator.

[0062] In the present disclosure, in order to avoid the loss of optical signals from the first port to the second port and from the second port to the third port of the optical circulator 30, a dual fiber collimator with a reflecting prism can be used to replace the structure of the optical circulator 30 with a reflecting mirror. Figure 2 A top view of a variable optical attenuator using a reflecting prism and a dual-fiber collimator according to an embodiment of the present application. Figure 2The optical path diagram of the variable optical attenuator on the XY plane is shown as follows: Figure 2 As shown in FIG. 1 , the variable optical attenuator can use a dual-fiber collimator with a reflecting prism to replace the optical circulator and the reflecting mirror. The dual-fiber collimator includes an input fiber and an output fiber. Figure 2 As shown, the optical signal inputted from the input optical fiber forms collimated light after passing through the collimating lens 201, and the collimated light is transmitted to the MEMS rotating mirror 101. The MEMS rotating mirror 101 reflects the light to the scanning lens 202. The scanning lens changes the direction of the light so that the light propagates along the X-axis. The light is attenuated by the linear attenuator 102 and then guided to the right-angle reflection prism 203. The right-angle reflection prism 203 changes the direction of the light beam by 180 degrees and translates it along the Z-direction. The light passes through the linear attenuator 102, the scanning lens 202 and the MEMS rotating mirror 101 in sequence again, and then is guided to the output optical fiber.

[0063] In the present disclosure, the loss of optical signals when propagating from the input end to the output end is reduced by using a dual-fiber collimator and a right-angle reflecting prism.

[0064] Figure 3 A side view of a variable optical attenuator using a reflecting prism and a dual fiber collimator according to an embodiment of the present application. Figure 3 is with Figure 2 Corresponding side view. Figure 3 The optical path diagram of the variable optical attenuator on the XZ plane is shown. The input optical fiber and the output optical fiber correspond to different Z values. The input optical path represented by the dotted line is the optical path of the optical signal input through the input optical fiber and transmitted to the right-angle reflection prism 203. The output optical path represented by the solid line is the optical path of the optical signal reflected by the right-angle reflection prism 203 and transmitted to the output optical fiber.

[0065] like Figure 3 As shown, the input optical path and the output optical path intersect at the MEMS rotating mirror 101. In the present disclosure, the MEMS rotating mirror 101 is located on the rear focal plane of the collimating lens and the front focal plane of the scanning lens 202. The rear focal point of the scanning lens 202 is located at the symmetric point Q of the right-angle reflection prism 203.

[0066] like Figure 3As shown. The input light Input forms a collimated light beam 1 after passing through the collimating lens 201. The light beam 1 is transmitted to the MEMS rotating mirror 101, and the light beam 2 is obtained after being reflected by the MEMS rotating mirror 101. Since the MEMS rotating mirror 101 is located on the front focal plane of the scanning lens 202, the light beam 2 reflected by the MEMS rotating mirror 101 is refracted by the scanning lens 202, and its main light is parallel to the optical axis (X-direction) of the scanning lens 202. The light beam is attenuated by the linear attenuator 102 and then transmitted to the right-angle reflection prism 203. After two reflections in the right-angle reflection prism 203, the direction of the light beam is rotated 180 degrees and the position is translated to the -Z direction. It passes through the linear attenuator 102 and the scanning lens 202 again to form a collimated light beam 3. The light beam 3 is reflected by the MEMS rotating mirror 101 to obtain the light beam 4. The light beam 4 enters the output optical fiber through the collimating lens 201.

[0067] The variable optical attenuator provided in the present disclosure determines the position of the light spot on the linear attenuator by changing the angle of the MEMS mirror to obtain the target attenuation value. This attenuation method can make each transverse film in the multimode optical fiber reach the same attenuation rate, thereby avoiding optical signal distortion. The variable optical attenuator using a dual fiber collimator and a right-angle reflection prism reduces the insertion loss of the optical path compared to the variable optical attenuator using an optical circulator and a reflector. The variable optical attenuator disclosed in the present disclosure has a compact structure and can be integrated into miniaturized optical fiber network equipment.

[0068] The present application also provides an optical signal processing method, the optical signal processing method comprising steps S1 and S2:

[0069] S1, if a variable optical attenuator is enabled, obtaining a first control signal, wherein the variable optical attenuator comprises a MEMS rotating mirror, a linear attenuator and an optical mirror assembly.

[0070] S2: Determine a driving parameter for a variable optical attenuator based on the first control signal, wherein the driving parameter is used to provide a driving force for a control component of the variable optical attenuator to control the rotation of the MEMS rotating mirror of the variable optical attenuator.

[0071] The optical signal processing method provided in the present disclosure can be applied to an electronic device equipped with the variable optical attenuator provided in the present disclosure, wherein the electronic device can be a mobile phone, a tablet computer or other electronic devices.

[0072] When the user operates the variable optical attenuator, the electronic device can detect that the variable optical attenuator is enabled, thereby generating a control signal. In the present disclosure, the control signal can be generated according to the user's operation action. The control signal includes a signal for controlling the rotation of the MEMS mirror to a target steering angle.

[0073] In the present disclosure, the electronic device can determine the driving parameters for the variable optical attenuator through the control signal, and the driving parameters can include driving current or voltage. For example, the driving current or voltage corresponding to controlling the rotation of the MEMS rotating mirror to the target steering angle can be determined as the driving parameter. The control component provides a driving force for the MEMS rotating mirror through the driving parameters to control the MEMS rotating mirror to rotate to the target steering angle.

[0074] In one possible implementation manner, the MEMS rotating mirror is located between the input optical fiber and the linear attenuator, and is specifically used to adjust the position of the first optical signal propagating to the linear attenuator.

[0075] In one embodiment, the optical mirror assembly includes:

[0076] A collimating lens, located between the input optical fiber and the MEMS rotating mirror;

[0077] A scanning lens is located between the MEMS rotating mirror and the linear attenuator, and the front focus of the scanning lens is located at the rotation axis of the MEMS rotating mirror; optionally, the front focus of the scanning lens is located at the rotation axis of the MEMS rotating mirror;

[0078] The first reflector or reflective prism is located after the linear attenuator. Optionally, the first reflector or reflective prism is located at the rear focus of the scanning lens.

[0079] In one possible implementation manner, the linear attenuator is located between the first reflector or reflective prism and the scanning lens; the attenuation of the optical signal by the linear attenuator satisfies the following formula:

[0080] P out =P in (1-kY)

[0081] Among them, P out Characterizes the output optical power of the linear attenuator, P out The unit is dB, P in Characterizes the input optical power of the linear attenuator, k is the preset attenuation coefficient, Y is the position of the light spot of the optical signal on the linear attenuator, and the zero point of Y corresponds to the maximum or minimum position of the rotation angle of the MEMS mirror.

[0082] In one possible implementation, the first reflector is a right-angle reflective prism.

[0083] In one possible implementation manner, the variable optical attenuator further includes: a control component, configured to control and adjust the rotation angle of the MEMS rotating mirror based on a control signal.

[0084] In one possible implementation manner, the variable optical attenuator further includes: an optical circulator, wherein a first port of the optical circulator is used to receive the input first optical signal, and a second port of the optical circulator is used to send the first optical signal into an attenuation optical system, and to direct the light reflected by the first reflector back into the attenuation optical system, and to form the second optical signal after further attenuation.

[0085] In the present disclosure, the position of the first optical signal propagating to the linear attenuator can be adjusted by controlling the steering angle of the MEMS rotating mirror, so that the attenuation degree of the light beam can be changed by using the linear attenuator, so that the optical signals of each mode in the multimode optical fiber are evenly attenuated, and the integrity of the optical signal is maintained to the greatest extent. The insertion loss of the optical path can be reduced by a dual-fiber collimator and a right-angle reflecting prism, and the optical signal processing performance of the variable optical attenuator is enhanced. The angle of the MEMS rotating mirror can be adjusted in time by the control component to control the attenuation degree, thereby improving the optical signal processing performance of the variable optical attenuator under dynamic environments and real-time signal processing requirements. In addition, the variable optical attenuator disclosed in the present disclosure has a compact structure and can be integrated into miniaturized optical fiber network equipment.

[0086] The present application also provides an electronic device, a variable optical attenuator, comprising: an optical signal adjustment component 10, an optical mirror component 20;

[0087] The optical signal adjustment component 10 is used to adjust the intensity of the first optical signal to be adjusted. The optical signal adjustment component includes a MEMS rotating mirror and a linear attenuator. The linear attenuator is located between the input optical fiber and the output optical fiber. The first optical signal is the optical signal input by the input optical fiber. The MEMS rotating mirror is used to adjust the position of the first optical signal on the linear attenuator.

[0088] The optical mirror assembly includes a lens and a reflector, and the optical mirror assembly and the optical signal adjustment assembly maintain an optical path connection;

[0089] A control component, used for controlling and adjusting the angle of the MEMS rotating mirror based on a control signal;

[0090] a memory for storing a computer program executable on the processor;

[0091] The processor is used to obtain the control signal when executing the program.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0093] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0094] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A variable optical attenuator, characterized in that: include: An optical signal adjustment component, used for adjusting the intensity of a first optical signal to be adjusted, the optical signal adjustment component comprises a MEMS rotating mirror and a linear attenuator, the linear attenuator is located between an input optical fiber and an output optical fiber, the first optical signal is an optical signal input to the optical fiber input, and the MEMS rotating mirror is used for adjusting the position of the first optical signal on the linear attenuator; An optical mirror assembly, wherein the optical mirror assembly comprises a lens and a reflector, and the optical path between the optical mirror assembly and the optical signal adjustment assembly is kept coherent; The second optical signal obtained after the variable optical attenuator adjusts the first optical signal is output by the output optical fiber, and the first optical signal and the second optical signal are single-mode optical fibers or multi-mode optical fibers.

2. The variable optical attenuator according to claim 1, characterized in that: The MEMS rotating mirror is located between the input optical fiber and the linear attenuator, and is specifically used to adjust the position of the first optical signal propagating to the linear attenuator.

3. The variable optical attenuator according to claim 2, characterized in that: The optical mirror assembly comprises: a collimating lens, located between the input optical fiber and the optical signal conditioning assembly; A scanning lens is located between the MEMS rotating mirror and the linear attenuator, and the front focus of the scanning lens is located at the rotation axis position of the MEMS rotating mirror; The first reflecting mirror is located after the linear attenuator and at the rear focus of the scanning lens.

4. The variable optical attenuator according to claim 3, characterized in that: The linear attenuator is located between the first reflector and the scanning lens; the attenuation of the optical signal by the linear attenuator satisfies the following formula: P out =P in (1-kY) Among them, P out Characterizes the output optical power of the linear attenuator, P out The unit is dB, P in Characterizes the input optical power of the linear attenuator, k is the preset attenuation coefficient, Y is the position of the light spot of the optical signal on the linear attenuator, and the zero point of Y corresponds to the maximum or minimum position of the rotation angle of the MEMS mirror.

5. The variable optical attenuator according to claim 3, characterized in that: The first reflector is a right-angle reflective prism.

6. The variable optical attenuator according to claim 1, characterized in that: Also includes: The control component is used to control and adjust the rotation angle of the MEMS rotating mirror based on a control signal.

7. The variable optical attenuator according to claim 3, characterized in that: Also includes: An optical circulator, wherein the first port of the optical circulator is used to receive the input first optical signal, and the second port of the optical circulator is used to send the first optical signal into the attenuation optical system, and make the light reflected by the first reflector pass through the attenuation optical system again to form the second optical signal.

8. An electronic device, characterized in that: include: A variable optical attenuator, comprising: an optical signal adjustment component and an optical mirror component; The optical signal adjustment component is used to adjust the intensity of the first optical signal to be adjusted, the optical signal adjustment component includes a MEMS rotating mirror and a linear attenuator, the linear attenuator is located between the input optical fiber and the output optical fiber, the first optical signal is the optical signal input by the input optical fiber, and the MEMS rotating mirror is used to adjust the position of the first optical signal on the linear attenuator; The optical mirror assembly includes a lens and a reflector, and the optical mirror assembly and the optical signal adjustment assembly maintain an optical path connection; The control component is used to control and adjust the rotation angle of the MEMS rotating mirror based on a control signal.

9. A method for processing an optical signal, characterized in that: The method comprises: If a variable optical attenuator is enabled, obtaining a first control signal, wherein the variable optical attenuator includes a MEMS rotating mirror, a linear attenuator, and an optical mirror assembly; Based on the first control signal, a driving parameter for the variable optical attenuator is determined, and the driving parameter is used to provide a driving force for a control component of the variable optical attenuator to control the rotation of the MEMS mirror of the variable optical attenuator.

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