CN115903146A - An Optical Switch Based on Digital Driving Principle - Google Patents

Abstract

The invention discloses an optical switch based on a digital driving principle, which comprises a base, a circuit board, a partition board, a baffle, a moving permanent magnet, a fixed permanent magnet, a reflector, an input optical fiber and an output optical fiber, wherein the circuit board is arranged on the base; a plurality of first grooves which are distributed in parallel are arranged on the base, and fixed permanent magnets are arranged in the first grooves; the circuit board, the isolation plate and the baffle are sequentially arranged above the first groove in a laminated mode from bottom to top; the baffle is provided with a sliding groove extending along the distribution direction of the first grooves, and the moving permanent magnet is arranged in the sliding groove. The invention is based on the digital driving principle, has simple structure and open-loop control, does not need to be provided with a feedback sensor, and has lower cost and compact installation structure compared with a device based on an analog actuator; the purpose of expandability of the optical switch can be achieved by increasing the stable position; the optical switch of the invention keeps a fixed output state without continuous energy maintenance, and solves the problem of keeping the output state of the optical switch when the power supply fails.

Description

An Optical Switch Based on Digital Driving Principle

technical field

The invention belongs to the technical field of optical switches, and in particular relates to an optical switch based on a digital driving principle.

Background technique

An optical switch is a multi-port optical path conversion device, which is an important part of a data optical network. Its main function is to switch optical signals, and then realize the function of logic conversion. They are critical to transforming data communication channels and improving the reliability of communication systems.

The currently commonly used optical switch is a mechanical structure optical switch. This type of optical switch mostly adopts a relay-type control mode. Its main features are low insertion loss, small crosstalk, good repeatability, independent of the wavelength and polarization state of the light used, and cheap , but has the disadvantages of large size, high power consumption, long switching time, and poor scalability, and is difficult to apply to occasions that require a large-scale switch matrix. In order to increase the network speed and reduce the cost, it is urgent to develop new optical switches to transition the optical-electrical hybrid network to the all-optical network.

Contents of the invention

Based on the above purpose, the present invention provides an optical switch based on the principle of digital driving, which has the characteristics of compact structure, small size, fast switching speed, convenient installation and high scalability, and can be integrated in a large-scale optical switch array.

In order to achieve the above object, the present invention adopts the following technical solutions to achieve:

An optical switch based on a digital driving principle, including a base, a circuit board, an isolation plate, a baffle, a moving permanent magnet, a fixed permanent magnet, a reflector, an input optical fiber, and an output optical fiber;

The base is provided with a plurality of first grooves distributed in parallel, and fixed permanent magnets are arranged in the first grooves; Above the first groove; the circuit board is provided with a plurality of wires corresponding to the position of the first groove, and the baffle is provided with a chute extending along the distribution direction of the first groove, The moving permanent magnet is arranged in the chute, and the isolation plate is used for providing a smooth moving surface for the moving permanent magnet and electrically isolating the moving permanent magnet and the circuit board; the magnetization of the moving permanent magnet and the fixed permanent magnet same direction;

The input optical fiber and the output optical fiber are connected above the baffle plate, the position of the output optical fiber corresponds to each stable position of the moving permanent magnet, and the reflector is connected above the moving permanent magnet, and the reflector is used to connect the input optical fiber The optical signal is reflected to the desired output fiber.

Preferably, the base is also provided with a second groove, the first groove is arranged at the bottom of the second groove, the circuit board and the isolation board are nested in the second groove, and the circuit board The sum of the thickness of the isolation plate and the thickness of the isolation plate is equal to the depth of the second groove.

Preferably, the circuit board is a flexible circuit board, and the wires are printed on the upper surface of the circuit board.

Preferably, the thickness of the circuit board is 0.3-0.5 mm.

Preferably, the separation plate is a glass plate, and the thickness of the glass plate is 0.3-0.5 mm.

Preferably, the moving permanent magnet is a flat key-shaped cylinder, and the sliding groove is an oblong circular groove.

Preferably, the fixed permanent magnet is a cylinder, and the shape of the first groove matches the shape of the fixed permanent magnet.

The invention also discloses an optical switch based on the digital driving principle, including a control board, a power amplifier and the optical switch based on the digital driving principle of the present invention, the control board is connected to the power amplifier, and the power amplifier is connected to the circuit The wires on the board are connected, the control board is used to provide the pulse current signal, and the power amplifier is used to amplify the pulse current signal provided by the control board.

Compared with prior art, the beneficial effect of the present invention is:

(1) The present invention is based on the principle of digital drive, simple in structure, open-loop control, and does not need to be provided with feedback sensors. Compared with devices based on analog actuators, the cost is lower and the installation structure is compact;

(2) Driven by current pulses, less heat is generated, energy is only consumed when switching between steady-state positions, the response time of the actuator is short, no hysteresis, and it has the advantages of low energy consumption and reduced Joule heating effect;

(3) The present invention is based on the principle of digital driving, and can achieve the purpose of the scalability of the optical switch by increasing the steady-state position.

(4) In the optical switch of the present invention, the moving permanent magnet and the fixed permanent magnet are placed in a pattern according to the same magnetization direction. In this way, the optical switch maintains a fixed output state without continuous energy maintenance, which solves the problem of maintaining the output state of the optical switch when the power supply fails.

Other advantages of the present invention will be described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

FIG. 1 is a schematic structural diagram of components of an expandable optical switch based on a digital principle recorded in an embodiment of the present invention.

Fig. 2 is a front view of an expandable optical switch based on a digital principle described in an embodiment of the present invention.

Fig. 3 is a schematic diagram of the use method of the scalable optical switch based on the digital principle recorded in the embodiment of the present invention

Fig. 4 is a schematic diagram of an X-axis positive direction switching method of an expandable optical switch based on a digital driving principle described in an embodiment of the present invention.

FIG. 5 is a schematic diagram of a method for switching in the negative direction of the X-axis of an expandable optical switch based on a digital driving principle described in an embodiment of the present invention.

The meaning of each label in the accompanying drawings:

1-base, 2-circuit board, 3-isolating plate, 4-baffle, 5-moving permanent magnet, 6-fixed permanent magnet, 7-mirror, 8-input fiber, 9-output fiber, 10-control board, 11 - power amplifier;

101-the first groove, 102-the second groove;

201-wire; 401-chute.

Detailed ways

Specific embodiments of the present invention are given below, and it should be noted that the present invention is not limited to the following specific embodiments, and all equivalent transformations done on the basis of the technical solutions of the present application all fall within the protection scope of the present invention.

Those of ordinary skill in the art can understand the specific meanings of the above terms in this technical solution according to specific situations. In the absence of a contrary statement, the used orientation words such as "upper, lower, bottom, top" usually refer to the definition based on the drawings of the corresponding drawings, and "inner and outer" refer to the definitions based on the drawings of the corresponding drawings. Profiles are defined for datums.

It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that the terms "comprising" and "having" and any variations thereof are intended to cover a non-exclusive Comprising, for example, a process, method, system, product, or device comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include steps or units not explicitly listed or for these processes, methods, Other steps or units inherent in a product or equipment.

An optical switch based on a digital drive principle disclosed in a specific embodiment of the present invention, as shown in FIG. Mirror 7, input fiber 8 and output fiber 9.

The base 1 is provided with a plurality of first grooves 101 distributed side by side, the first grooves 101 are provided with fixed permanent magnets 6, and the number of fixed permanent magnets 6 is expanded according to actual needs. Shown are 3. The fixed permanent magnet 6 of this embodiment is a cylinder, which is easier to process on the one hand, and secondly, the two poles of the cylinder are stronger in magnetism; the shape of the first groove 101 matches the shape of the fixed permanent magnet 6 .

The circuit board 2 , the isolation plate 3 , and the baffle plate 4 are sequentially stacked and arranged above the first groove 101 from bottom to top. In order to limit the circuit board 2 and the isolation, a second groove 102 is provided on the upper surface of the base 1, and the first groove 101 is arranged at the bottom of the second groove 102, between the thickness of the circuit board 2 and the isolation plate 3 and are equal to the depth of the second groove 102, after the circuit board 2 and the isolation plate 3 are placed in the second groove, the upper surface of the isolation plate 3 is flush with the upper surface of the base 1, so that the circuit board 2 and the isolation plate 3 are limited to In the second groove 102.

A plurality of wires 201 corresponding to the positions of the first grooves 101 are arranged on the circuit board 2 , and the wires 201 are insulated from the fixed permanent magnet 6 . The circuit board 2 of this embodiment is a flexible circuit board, the thickness of the circuit board 2 is 0.3-0.5 mm, and the wires 201 are printed on the upper surface of the circuit board 2 .

The baffle plate 4 is provided with a chute 401 extending along the distribution direction of the first grooves 101 , the moving permanent magnet 5 is arranged in the chute 401 , and the magnetization direction of the moving permanent magnet 5 is the same as that of the fixed permanent magnet 6 . The chute 401 of this embodiment is a long circular trough, and the moving permanent magnet 5 is a flat key-shaped cylinder, which is convenient for moving to both ends of the chute 401 to play a buffering role.

Both the base 1 and the baffle 4 of this embodiment are made of non-magnetic materials, and the base 1 and the baffle 4 are fixedly connected to each other by non-magnetic screws.

The isolation plate 3 is used to provide a smooth moving surface for the moving permanent magnet 5 and electrically isolate the moving permanent magnet 5 and the circuit board 2. The isolation plate 3 in this embodiment is a glass plate with a thickness of 0.3-0.5 mm.

The input optical fiber 8 and the output optical fiber 9 are connected to the upper surface of the baffle 4, and both the input optical fiber 8 and the output optical fiber 9 are laser diodes. The position of the output optical fiber 9 corresponds to each steady-state position of the moving permanent magnet 5 , and the position of the output optical fiber 9 also corresponds to the position of the fixed permanent magnet 6 . The mirror 7 is connected above the moving permanent magnet 5, the input fiber 8, the output fiber 9 and the mirror 7 are located at the same level, and the mirror 7 is used to reflect the optical signal of the input fiber 8 to the required output fiber 9.

The driving principle of the optical switch of this embodiment is:

The wire 201 on the circuit board 2 generates a mutual Lorentz force with the moving permanent magnet 5 under the action of the incoming pulse current. Since the wire 201 on the circuit board is in a fixed state, the permanent magnet moves under the action of the Lorentz force. 5 Switch between the designed steady-state positions, and the position of the reflector 7 is also switched accordingly. According to the position of the reflector 7, the optical signal of the input optical fiber 8 will be reflected to one of the output optical fibers 9, and the output of the optical switch The status changes accordingly.

Since the moving permanent magnet 5 is subjected to the static magnetic force from the fixed permanent magnet 6 in the steady state position when moving in the chute 401, the moving permanent magnet 5 has a certain anti-interference ability and does not need continuous energy consumption when it is in the steady state position. . In addition, the present invention can realize the expansion of the output state of the optical switch by increasing the length of the chute 401 and the number of fixed permanent magnets 6 .

Another specific embodiment of the present invention discloses an optical switch based on the digital driving principle, as shown in FIG. 1 , including a control board 10, a power amplifier 11, and the scalable optical switch based on the digital driving principle described in the above embodiments. Wherein, the control board 10 is connected with the power amplifier 11, and the power amplifier 11 is connected with the wire 201 on the circuit board 2. The control board 10 of this embodiment is a data acquisition card for providing pulsed current signals, and the power amplifier 11 is a voltage-current converter. The device is used to amplify the pulse current signal provided by the control board 10.

The use process of the optical switch based on the digital drive principle of the present invention is as follows:

The optical signal emitted by the input optical fiber 8 enters the interior of the optical switch and reaches the reflector 7, and the optical signal enters the output optical fiber 9 under the reflection of the reflector 7 according to the steady position of the moving permanent magnet 5.

When the output state of the optical switch is to be switched, the control board 10 sends a pulse current control signal according to the demand, and reaches the power amplifier 11, and the power amplifier 11 linearly amplifies the pulse current control signal provided by the control board 10 to the required current value. And deliver the pulse driving current to the circuit board 2 . The wire 201 on the circuit board 2 generates a mutual Lorentz force with the moving permanent magnet 5 under the action of the pulse drive current of the power amplifier 11. Since the wire 201 on the circuit board 2 is in a fixed state, under the action of the Lorentz force The lower moving permanent magnet 5 is switched between steady-state positions, and the reflector 7 is also switched accordingly. According to the position of the reflector 7, the optical signal of the input optical fiber 8 will be reflected in one of the output optical fibers 9, and the output state of the optical switch will also be Change accordingly.

As shown in Figure 4, when the moving permanent magnet 5 needs to move towards the positive direction of the X-axis, the pulse drive current passed into the circuit board 2 is injected towards the positive Y-axis direction; on the contrary, as shown in Figure 5, when the moving permanent magnet When the movement direction of 5 is the negative direction of the X axis, the pulse drive current passed into the circuit board 2 is injected in the direction of the negative Y axis. By inputting pulse driving currents in different directions, the switching of the output state of the optical switch can be realized. When the moving permanent magnet 5 moves in the chute 401, it only has a fixed stop position, which corresponds to the position of the fixed permanent magnet 6.

Claims (8)

1. An optical switch based on a digital drive principle is characterized in that it comprises a base (1), a circuit board (2), an isolation plate (3), a baffle plate (4), a moving permanent magnet (5), a fixed permanent magnet (6), mirror (7), input optical fiber (8) and output optical fiber (9); The base (1) is provided with a plurality of first grooves (101) distributed side by side, and fixed permanent magnets (6) are arranged in the first grooves (101); the circuit board (2) , isolation plate (3), baffle plate (4) are sequentially stacked above the first groove (101) from bottom to top; the circuit board (2) is provided with the first groove ( 101) a plurality of wires (201) corresponding to the position, the baffle plate (4) is provided with a chute (401) extending along the distribution direction of the first groove (101), and the moving permanent magnet (5) Arranged in the chute (401), the isolation plate (3) is used to provide a smooth moving surface for the moving permanent magnet (5) and electrically isolate the moving permanent magnet (5) and the circuit board (2); Said moving permanent magnet (5) is identical with the magnetization direction of fixed permanent magnet (6); The input optical fiber (8) and the output optical fiber (9) are connected above the baffle plate (4), the position of the output optical fiber (9) corresponds to each steady state position of the moving permanent magnet (5), and the reflector ( 7) Connected above the moving permanent magnet (5), the reflector (7) is used to reflect the optical signal of the input optical fiber (8) to the required output optical fiber (9). 2. The optical switch based on the digital driving principle according to claim 1, characterized in that, the base (1) is also provided with a second groove (102), and the first groove (101) is set At the bottom of the second groove (102), the circuit board (2) and the isolation plate (3) are nested in the second groove (102), and the thickness of the circuit board (2) and the isolation plate (3) The sum is equal to the depth of the second groove (102). 3. The optical switch based on digital driving principle according to claim 1, characterized in that, the circuit board (2) is a flexible circuit board, and the wires (201) are printed on the upper surface of the circuit board (2). 4. The optical switch based on the digital driving principle according to claim 1 or 3, characterized in that the thickness of the circuit board (2) is 0.3-0.5 mm. 5. The optical switch based on the digital driving principle according to claim 1, characterized in that, the isolation plate (3) is a glass plate, and the thickness of the glass plate is 0.3-0.5 mm. 6. The optical switch based on the digital driving principle according to claim 1, characterized in that, the moving permanent magnet (5) is a flat key-shaped column, and the chute (401) is a long circular groove. 7. The optical switch based on digital drive principle as claimed in claim 1, characterized in that, the fixed permanent magnet (6) is a cylinder, and the shape of the first groove (101) matches the shape of the fixed permanent magnet (6) . 8. An optical switch based on a digital drive principle, characterized in that it comprises a control panel (10), a power amplifier (11) and the optical switch based on a digital drive principle according to any one of claims 1 to 7, said The control board (10) is connected with the power amplifier (11), and the power amplifier (11) is connected with the wire (201) on the circuit board (2), and the control board (10) is used to provide the pulse current signal, and the The power amplifier (11) is used for amplifying the pulse current signal provided by the control board (10).

Images