Driving circuit of magneto-optical switch
By introducing a signal control module and a monitoring module into the magneto-optical switch driving circuit, providing driving and hysteresis pulse parameters, the problem of slow switching speed of magneto-optical switch is solved, and faster optical path switching is achieved.
Patent Information
- Application Number
- CN202510236010.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2025-07-11
AI Technical Summary
The existing magneto-optical switches have a large inductance and time constant of the Faraday optical rotor, which leads to a slow switching time, and the hysteresis phenomenon affects the switching speed.
The signal control module is used to provide driving pulses and hysteresis pulse parameters, and the pulse signal is generated by the pulse driving module to control the high-speed magnetic field module. Combined with the monitoring and testing module to monitor the optical path switching state in real time, it provides hysteresis pulses to eliminate the hysteresis effect of the magnetic field coil.
It effectively improves the optical path switching speed of the optical device, eliminates the hysteresis effect of the magnetic field coil, and improves the switching performance of the magneto-optical switch.
Smart Images
Figure CN120295040A_ABST
Abstract
Description
Technical Field
[0001] This application generally relates to the technical field of magneto - optical switches, and particularly to a driving circuit for a magneto - optical switch. Background Art
[0002] The principle of a magneto - optical switch is to utilize the Faraday rotation effect. By changing the external magnetic field, the influence of the magneto - optical crystal on the polarization plane of the incident polarized light is changed, thereby achieving the effect of switching the optical path. Compared with traditional mechanical optical switches, it has advantages such as fast switching speed and high stability. Compared with other non - mechanical optical switches, it also has advantages such as low driving voltage and small crosstalk, and is now widely used in the field of optical communication.
[0003] A 1X2 magneto - optical switch can provide optical switching between one input port and two output ports, or between two input ports and one output port. Such switches have been widely used in the wireless communication industry. However, due to the large inductance and time constant of the Faraday rotator, the switching time of the magneto - optical switch is hindered; and for a magneto - optical crystal that has been magnetized forward / backward, the decay time of the internal magnetic field is dozens of times the establishment time of the internal induced magnetic field. This magnetic hysteresis phenomenon greatly affects the switching speed of the magneto - optical switch. Summary of the Invention
[0004] In view of the above - mentioned defects or deficiencies in the prior art, it is desirable to provide a driving circuit for a magneto - optical switch that can effectively eliminate the magnetic hysteresis effect of the magnetic field coil and improve the optical path switching speed in an optical device.
[0005] In some embodiments, this application provides a driving circuit for a magneto - optical switch, including: a signal control module, a pulse driving module, and a high - speed magnetic field module connected in sequence.
[0006] The signal control module is configured to provide pulse parameters for the pulse driving module. The pulse parameters include driving pulse parameters corresponding to the driving pulse and degaussing pulse parameters corresponding to the degaussing pulse.
[0007] The pulse driving module is configured to generate a pulse signal based on the pulse parameters provided by the signal control module and control the high - speed magnetic field module based on the pulse signal.
[0008] The high - speed magnetic field module is configured to generate a high - speed magnetic field in response to the control of the pulse signal to control the optical device to perform optical path switching through the high - speed magnetic field.
[0009] In some embodiments, the pulse width of the degaussing pulse is less than the pulse width of the driving pulse, or the amplitude of the degaussing pulse is less than the amplitude of the driving pulse.
[0010] In some embodiments, there is a monitoring and testing module, which is respectively connected to the optical device and the signal control module.
[0011] The monitoring and testing module is used to monitor the state of the optical path switching of the optical device and send the optical path switching information to the signal control module.
[0012] In some embodiments, the signal control module is further configured to:
[0013] In response to the optical path switching information, provide the anti-hysteresis pulse parameters to the pulse driving module.
[0014] In some embodiments, the pulse driving module includes a gate driving sub-module and a MOS transistor push-pull sub-module.
[0015] The gate driving sub-module is configured to provide a control signal to the MOS transistor push-pull sub-module in response to the pulse parameters.
[0016] The MOS transistor push-pull sub-module is configured to generate a pulse signal in response to the control signal.
[0017] In some embodiments, there are two pulse driving modules, which are respectively arranged at both ends of the high-speed magnetic field module.
[0018] In some embodiments, the pulse frequency of the driving pulse is 1KHZ, and the pulse width is 10μs.
[0019] In some embodiments, both the driving pulse and the anti-hysteresis pulse include a positive pulse and a negative pulse with a preset delay interval.
[0020] In some embodiments, the delay intervals of the driving pulse and the anti-hysteresis pulse are the same.
[0021] In some embodiments, the pulse direction of the anti-hysteresis pulse is opposite to the pulse direction of its corresponding driving pulse.
[0022] The technical solutions provided by the embodiments of the present application may include the following beneficial effects:
[0023] The driving circuit of the magneto-optical switch provided by the embodiments of the present application can, while providing the driving pulse parameters for the pulse driving module, also provide the anti-hysteresis pulse parameters for the pulse driving module, so that the pulse driving module controls the high-speed magnetic field module respectively based on the driving pulse parameters and the anti-hysteresis pulse parameters, thereby effectively eliminating the magnetic hysteresis effect of the magnetic field coil in the high-speed magnetic field module, and further improving the optical path switching speed in the optical device. Description of the Drawings
[0024] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments read in conjunction with the accompanying drawings:
[0025] Figure 1 Shows the drive signal of the magneto-optical switch and the optical path switching diagram in the related art;
[0026] Figure 2 Shows a schematic structural diagram of the drive circuit of the magneto-optical switch provided by an embodiment of the present application;
[0027] Figure 3 Shows a schematic diagram of a pulse signal provided by an embodiment of the present application;
[0028] Figure 4 Shows a schematic structural diagram of the drive circuit of the magneto-optical switch provided by another embodiment of the present application;
[0029] Figure 5 Shows a schematic structural diagram of the drive circuit of the magneto-optical switch provided by still another embodiment of the present application. Detailed Description of the Invention
[0030] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention and are not intended to limit the invention. Additionally, it should be noted that for the sake of description, only parts related to the invention are shown in the drawings.
[0031] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and embodiments.
[0032] In the related art, a 1X2 magneto-optical switch is used to provide optical switching, and such a switch has been widely applied in the wireless communication industry. However, due to the large inductance and time constant of the Faraday rotator, the switching time of the magneto-optical switch is hindered; and for a magneto-optical crystal that has been magnetized in the forward / backward direction, the decay time of the internal magnetic field is dozens of times the establishment time of the internal induced magnetic field, and this hysteresis phenomenon greatly affects the switching speed of the magneto-optical switch.
[0033] Specifically, Figure 1 Shows the drive signal of the magneto-optical switch in the related art and the optical path switching diagram driven by the drive signal. It can be seen that when the positive pulse drives the coil of the high-speed magnetic field module, the optical path switches after a certain time. When the negative pulse drives the coil of the high-speed magnetic field module, due to the hysteresis effect of the magnetic field coil, there is a phenomenon of slow switching as shown in Figure 1 the latter half part.
[0034] Based on this, the present application proposes a driving circuit for a magneto-optical switch, which can effectively eliminate the hysteresis effect of the magnetic field coil.
[0035] Figure 2 FIG. shows a schematic structural diagram of a driving circuit for a magneto-optical switch provided by an embodiment of the present application. As Figure 2 shown, the driving circuit 10 of the magneto-optical switch provided by the embodiment of the present application includes a signal control module 11, a pulse driving module 12, and a high-speed magnetic field module 13 that are connected in sequence.
[0036] Among them, the signal control module 11 is configured to provide pulse parameters for the pulse driving module 12. The pulse parameters include driving pulse parameters corresponding to the driving pulse and demagnetization pulse parameters corresponding to the demagnetization pulse.
[0037] It should be noted that the demagnetization pulse is a control pulse for demagnetizing the magnetic field coil during the pulse control of the high-speed magnetic field to avoid the occurrence of switching hysteresis later.
[0038] Optionally, the pulse width of the demagnetization pulse is less than the pulse width of the driving pulse, or the amplitude of the demagnetization pulse is less than the amplitude of the driving pulse.
[0039] Exemplarily, as Figure 3 shown, (a) is that the pulse width of the demagnetization pulse is less than the pulse width of the driving pulse, and (b) is that the amplitude of the demagnetization pulse is less than the amplitude of the driving pulse.
[0040] The pulse driving module 12 is configured to generate a pulse signal based on the pulse parameters provided by the signal control module, and control the high-speed magnetic field module based on the pulse signal.
[0041] The high-speed magnetic field module 13 is configured to generate a high-speed magnetic field in response to the control of the pulse signal, so as to control the optical device to perform optical path switching through the high-speed magnetic field.
[0042] That is to say, the signal control module 11 can also provide demagnetization pulse parameters for the pulse driving module 12 while providing driving pulse parameters for the pulse driving module 12, so that the pulse driving module 12 controls the high-speed magnetic field module based on the driving pulse parameters and the demagnetization pulse parameters respectively, thereby effectively eliminating the hysteresis effect of the magnetic field coil in the high-speed magnetic field module, and further improving the optical path switching speed in the optical device.
[0043] In some embodiments, as Figure 4 shown, the driving circuit 10 further includes a monitoring and testing module 14, and the monitoring and testing module 14 is respectively connected to the optical device and the signal control module.
[0044] The monitoring and testing module 14 is used to monitor the state of the optical path switching of the optical device, and send the optical path switching information to the signal control module.
[0045] Furthermore, the signal control module 11 is further configured to: in response to the optical path switching information, provide the anti-hysteresis pulse parameters to the pulse driving module 12.
[0046] That is to say, in the embodiment of the present application, the driving circuit monitors the optical device through the monitoring and testing module 14 to collect the optical path switching information of the optical device, so that the signal control module 11 can provide the anti-hysteresis pulse parameters to the pulse driving module in response to the optical path switching information. That is, after the optical device is driven by the high-speed magnetic field module 13 to perform optical path switching, the signal control module 11 provides the anti-hysteresis pulse parameters to the pulse driving module 12, so that the pulse driving module 12 provides an anti-hysteresis pulse for the high-speed magnetic field module 13, thereby eliminating the magnetic hysteresis effect of the magnetic field coil in the high-speed magnetic field module 13.
[0047] Optionally, the pulse frequency of the driving pulse is 1KHZ, and the pulse width is 10μs.
[0048] Optionally, both the driving pulse and the anti-hysteresis pulse include a positive pulse and a negative pulse with a preset delay interval.
[0049] Optionally, the delay intervals of the driving pulse and the anti-hysteresis pulse are the same.
[0050] In a specific embodiment, taking Figure 3 as an example, the delay interval of the driving pulse is 100μs. After the optical device responds to the driving pulse to perform optical path switching, the signal control module 11 provides the anti-hysteresis pulse parameters to the pulse driving module 12, and the pulse driving module 12 provides an anti-hysteresis pulse with a pulse width or amplitude smaller than that of the driving pulse based on the pulse parameters, so as to achieve the purpose of eliminating the magnetic hysteresis effect of the magnetic field coil.
[0051] Preferably, the pulse direction of the anti-hysteresis pulse is opposite to the pulse direction of its corresponding driving pulse.
[0052] Exemplarily, as Figure 3 shown, when the driving pulse is a positive pulse, the anti-hysteresis pulse provided by the signal control module 11 to the pulse driving module 12 in response to the optical path switching information is a negative pulse. Further, if the driving pulse provided by the signal control module 11 to the pulse driving module 12 after a preset delay interval is a negative pulse, then the anti-hysteresis pulse provided by the signal control module 11 to the pulse driving module 12 in response to the optical path switching information is a positive pulse.
[0053] It should also be understood that when the anti-hysteresis pulse parameters are selected appropriately, it is also possible to control the magnetic flux of the magnetic field coil in the high-speed magnetic field module in advance, thereby further improving the switching speed of the magneto-optical switch.
[0054] In a feasible embodiment, as Figure 5As shown, the pulse driving module 12 includes a gate driving sub-module 121 and a MOS transistor push-pull sub-module 122.
[0055] Among them, the gate driving module 121 is configured to provide a control signal for the MOS transistor push-pull sub-module 122 in response to pulse parameters.
[0056] The MOS transistor push-pull sub-module is configured to generate a pulse signal in response to the control signal.
[0057] Optionally, there are two pulse driving modules, which are respectively arranged at both ends of the high-speed magnetic field module.
[0058] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.
[0059] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.
[0060] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. Terms such as "arranged" as used herein can mean that a component is directly attached to another component or that a component is attached to another component through an intermediate member. The features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.
[0061] The present invention has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present invention within the scope of the described embodiments. Those skilled in the art can understand that according to the teachings of the present invention, more variations and modifications can be made, and these variations and modifications all fall within the scope of protection required by the present invention.
Claims
1. A driving circuit for a magneto-optical switch, characterized in that, Including: A signal control module, a pulse driving module, and a high-speed magnetic field module connected in sequence. The signal control module is configured to provide pulse parameters for the pulse driving module, and the pulse parameters include driving pulse parameters corresponding to driving pulses and cancellation pulse parameters corresponding to cancellation pulses. The pulse driving module is configured to generate a pulse signal based on the pulse parameters provided by the signal control module and control the high-speed magnetic field module based on the pulse signal. The high-speed magnetic field module is configured to generate a high-speed magnetic field in response to the control of the pulse signal to control an optical device to perform optical path switching through the high-speed magnetic field.
2. The drive circuit of the magneto-optical switch according to claim 1, wherein The pulse width of the cancellation pulse is less than the pulse width of the driving pulse, or the amplitude of the cancellation pulse is less than the amplitude of the driving pulse.
3. The drive circuit of the magneto-optical switch according to claim 1, characterized in that, The driving circuit further includes: a monitoring and testing module, and the monitoring and testing module is respectively connected to the optical device and the signal control module. The monitoring and testing module is used to monitor the state of the optical path switching of the optical device and send the optical path switching information to the signal control module.
4. The driving circuit of the magneto-optical switch according to claim 3, characterized in that, The signal control module is further configured to: In response to the optical path switching information, provide the cancellation pulse parameters to the pulse driving module.
5. The drive circuit of the magneto-optic switch according to claim 1, characterized in that, The pulse driving module includes a gate driving sub-module and a MOS transistor push-pull sub-module. The gate driving sub-module is configured to provide a control signal for the MOS transistor push-pull sub-module in response to the pulse parameters. The MOS transistor push-pull sub-module is configured to generate a pulse signal in response to the control signal.
6. The drive circuit of the magneto-optical switch according to claim 5, characterized in that There are two pulse driving modules, which are respectively arranged at both ends of the high-speed magnetic field module.
7. The drive circuit of the magneto-optical switch according to claim 1, characterized in that, The pulse frequency of the driving pulse is 1KHZ, and the pulse width is 10μs.
8. The drive circuit of the magneto-optical switch according to claim 1, characterized in that, Both the driving pulse and the cancellation pulse include a positive pulse and a negative pulse with a preset delay interval.
9. The drive circuit of the magneto-optical switch according to claim 8, characterized in that, The delay intervals of the driving pulse and the cancellation pulse are the same.
10. The drive circuit of the magneto-optical switch according to any one of claims 1-9, characterized in that, The pulse direction of the cancellation pulse is opposite to the pulse direction of the corresponding driving pulse.