An integrated polarization-maintaining fiber acousto-optic modulator

Abstract

The utility model relates to optical fiber acoustooptic modulator, concretely relates to an integrated polarization maintaining optical fiber acoustooptic modulator, in the patent scheme of this integrated polarization maintaining optical fiber acoustooptic modulator, including acoustooptic modulator and driver, acoustooptic modulator and driver set up in same shell, shell includes upper casing, lower casing and side casing, acoustooptic modulator and driver are fixed on the lower casing, and acoustooptic modulator is connected with driver through metal wire drive. This through the integrated scheme of acoustooptic converter and driver in a shell becomes a whole, makes optical fiber acoustooptic modulator have more compact, the higher advantage of integrity, when using, need not with radio frequency coaxial connecting line to connect acoustooptic converter and driver, only need to install good shell and connect relevant interface can use.

Description

Technical Field

[0001] This utility model relates to fiber optic acousto-optic modulators, specifically to an integrated polarization-maintaining fiber optic acousto-optic modulator. Background Technology

[0002] Polarization-maintaining acousto-optic modulators (PAEMs) are important optoelectronic devices widely used in communication, sensing, and laser systems. For example, in fiber optic communication systems, PAEMs are used to modulate the intensity and phase of optical signals to achieve high-speed data transmission. Due to their excellent polarization-preserving characteristics, they can effectively reduce signal attenuation and distortion, improving communication quality. In lidar systems, PAEMs are used to control the transmission and reception of laser pulses. By precisely modulating the laser signal, the accuracy and range of target detection can be improved, making them widely used in autonomous driving, terrain mapping, and other fields. While the structure of current PAEMs is relatively complex, their main components can be summarized as follows: an acoustic wave generator, an optical crystal, a polarizer, and a driving circuit. Among these components, the acoustic wave generator, optical crystal, and polarizer are usually integrated into an acousto-optic converter, while the driving circuit is a single unit serving as the driving control circuit for the acousto-optic converter. Because the driving circuit and the acousto-optic converter are separate components, additional wiring is required for their proper operation. Furthermore, installation must be performed in two separate parts, making installation cumbersome and time-consuming, which is quite inconvenient. Therefore, there is a need for an acousto-optic modulator that integrates the acousto-optic converter and the driver. Utility Model Content

[0003] To address the shortcomings of the existing technology, the present invention aims to provide an integrated polarization-maintaining fiber optic acousto-optic modulator. By integrating the acousto-optic converter and driver into a single housing, it achieves the advantages of being more compact and having a higher overall integrity, thus facilitating installation.

[0004] This utility model discloses an integrated polarization-maintaining fiber optic acousto-optic modulator through an embodiment, including an acousto-optic modulator and a driver. The acousto-optic modulator and the driver are disposed in the same housing, which includes an upper housing, a lower housing, and a side housing. The acousto-optic modulator and the driver are fixed on the lower housing, and the acousto-optic modulator and the driver are driven connected by a metal wire. The side housing has an input through hole, an output through hole, a power supply through hole, and a modulation signal through hole.

[0005] Furthermore, the side shell is provided with several grooves recessed towards its center, the lower shell is provided with a first screw hole at the position corresponding to the groove, and the upper shell is provided with a notch at the position corresponding to the groove.

[0006] Furthermore, a plurality of second screw holes are respectively provided on the contact surfaces of the measuring housing, the lower housing, and the upper housing, and a third screw hole corresponding to the second screw hole is respectively provided on the lower housing and the upper housing; the measuring housing and the lower housing are fixedly connected by screws through the second screw hole and the third screw hole, and the side housing and the upper housing are fixedly connected by screws through the second screw hole and the third screw hole.

[0007] Furthermore, the optical modulator includes an input optical fiber, an acousto-optic converter, and an output optical fiber. The input optical fiber and the output optical fiber are fixed by optical fiber fixing brackets, and the axes of the end of the input optical fiber and the starting end of the output optical fiber are on the same straight line. The acousto-optic converter is located between the end of the input optical fiber and the starting end of the output optical fiber.

[0008] Furthermore, the acousto-optic converter and the driver are connected via metal wires.

[0009] Furthermore, the center points of both the input and output vias are located on the line connecting the axis of the end of the input fiber and the starting point of the output fiber; the input fiber passes through the input via, and the output fiber passes through the output via.

[0010] Furthermore, the driver includes a driver circuit board, a power supply interface, and a modulation signal interface; the power supply interface is used to connect an external power supply to power the driver circuit board, and the modulation signal interface is connected to the driver circuit board; the output of the driver circuit board is connected to the acousto-optic modulator to output a drive signal to the acousto-optic modulator; the power supply interface passes through a power supply through-hole, and the modulation signal interface passes through a modulation signal through-hole.

[0011] Furthermore, the modulation signal interface includes an RF coaxial cable interface.

[0012] Furthermore, rubber protective pads are provided at both the input and output through holes.

[0013] Beneficial effects: The integrated polarization-maintaining fiber optic acousto-optic modulator provided by this utility model integrates the acousto-optic converter and driver into a single housing, making it more compact and with higher overall integrity. In use, there is no need to use an RF coaxial cable to connect the acousto-optic converter and driver; simply install the housing and connect the relevant interfaces to use it.

[0014] It should be noted that the terms "first," "second," "left," "right," and similar terms used in this article are merely for describing the constituent elements of the technical solution and do not constitute a limitation on the technical solution, nor should they be interpreted as an indication or implication of the importance of the corresponding elements; elements with terms such as "first," "second," "left," "right," etc., indicate that the corresponding technical solution contains at least one of these elements. Attached Figure Description

[0015] Figure 1This is an exploded view of an integrated polarization-maintaining fiber optic acousto-optic modulator according to this utility model.

[0016] The diagram shows the following markings: 1-Acousto-optic modulator, 11-Input fiber optic cable, 12-Acousto-optic converter, 13-Output fiber optic cable, 14-Fiber optic cable holder, 15-Rubber protective pad, 2-Driver, 21-Driver circuit board, 22-Signal modulation interface, 23-Power supply interface, 31-Upper housing, 32-Side housing, 33-Lower housing, 4-Metal wire, 51-Input through hole, 52-Output through hole, 54-Power supply through hole, 53-Modulation signal through hole, 6-Large screw, 61-Groove, 62-First screw hole, 63-Notch, 7-Small screw, 71-Second screw hole, 73-Third screw hole. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described below are only for explaining the technical solutions of the present invention, and not for limiting the present invention. Furthermore, the parts described in the embodiments or drawings are merely illustrative examples of relevant parts of the present invention, and not the entirety of the present invention. At the same time, all other embodiments obtained by those skilled in the art based on the embodiments of the present invention should naturally fall within the protection scope of the present invention.

[0018] like Figure 1 As shown in the figure, this utility model discloses an integrated polarization-maintaining fiber optic acousto-optic modulator, including an acousto-optic modulator 1 and a driver 2. The acousto-optic modulator 1 and the driver 2 are disposed in the same housing, which includes an upper housing 31, a lower housing 33 and a side housing 32. The acousto-optic modulator 1 and the driver 2 are fixed on the lower housing 33, and the acousto-optic modulator 1 and the driver 2 are drivenly connected by a metal wire 4. The side housing 32 is provided with an input through hole 51, an output through hole 52, a power supply through hole 54 and a modulation signal through hole 53.

[0019] In this embodiment, the side housing 32 is provided with three recesses 61 facing towards its center, the lower housing 33 is provided with a first screw hole 62 at the position corresponding to the recesses 61, and the upper housing 31 is provided with a notch 63 at the position corresponding to the recesses 61. When installing this integrated polarization-maintaining fiber optic acousto-optic modulator, the lower housing 33 can be fixed by passing a large screw 6 through the first screw hole 62.

[0020] In this embodiment, a plurality of second screw holes 71 are respectively provided on the contact surfaces of the measuring housing 32 with the lower housing 33 and the upper housing 31, and a third screw hole 72 corresponding to the second screw hole 71 is respectively provided on the lower housing 33 and the upper housing 31; the measuring housing 32 and the lower housing 33 are fixedly connected by small screws 7 through the second screw holes 71 and the third screw holes 72, and the side housing 32 and the upper housing 31 are fixedly connected by small screws 7 through the second screw holes 71 and the third screw holes 72.

[0021] In this embodiment, the optical modulator 1 includes an input optical fiber 11, an acousto-optic converter 12, and an output optical fiber 13. The input optical fiber 11 and the output optical fiber 13 are fixed by optical fiber fixing brackets 14. The axes of the end of the input optical fiber 11 and the starting end of the output optical fiber 13 are on the same straight line. The acousto-optic converter 12 is located between the end of the input optical fiber 11 and the starting end of the output optical fiber 13.

[0022] In this embodiment, the acousto-optic converter 12 and the driver 2 are connected by a metal wire 4.

[0023] In this embodiment, the center points of the input through-hole 51 and the output through-hole 52 are both located on the line connecting the axis of the end of the input optical fiber 11 and the starting point of the output optical fiber 13; the input optical fiber 11 passes through the input through-hole 51, and the output optical fiber 13 passes through the output through-hole 52.

[0024] In this embodiment, the driver 2 includes a driver circuit board 21, a power supply interface 23, and a modulation signal interface 22. The power supply interface 23 is used to connect an external power supply to power the driver circuit board 21, and the modulation signal interface 22 is connected to the driver circuit board 21. The output of the driver circuit board 21 is connected to the acousto-optic modulator 1 to output a driving signal to the acousto-optic modulator 1. The power supply interface 23 passes through the power supply through-hole 54, and the modulation signal interface 22 passes through the modulation signal through-hole 53.

[0025] In this embodiment, the modulation signal interface 22 includes a radio frequency coaxial cable interface.

[0026] In this embodiment, rubber protective pads 51 are provided at both the input through hole 51 and the output through hole 52 to protect the optical fiber from being easily bent.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] It should be noted that the above embodiments are only for more clearly illustrating the technical solution of this utility model. Those skilled in the art will understand that the implementation of this utility model is not limited to the above content. Any obvious changes, substitutions or replacements made based on the above content do not exceed the scope of the technical solution of this utility model. Other implementations will also fall within the scope of this utility model without departing from the concept of this utility model.

Claims

1. An integrated polarization-maintaining fiber optic acousto-optic modulator, comprising an acousto-optic modulator and a driver, characterized in that: The acousto-optic modulator and the driver are housed in the same housing, which includes an upper housing, a lower housing, and a side housing. The acousto-optic modulator and the driver are fixed on the lower housing, and the acousto-optic modulator and the driver are connected by a metal wire. The side housing has an input through hole, an output through hole, a power supply through hole, and a modulation signal through hole.

2. The integrated polarization-maintaining fiber optic acousto-optic modulator according to claim 1, characterized in that: The side shell is provided with a plurality of grooves recessed toward its center, the lower shell is provided with a first screw hole at the position corresponding to the groove, and the upper shell is provided with a notch at the position corresponding to the groove.

3. The integrated polarization-maintaining fiber optic acousto-optic modulator according to claim 1, characterized in that: The measuring housing and the contact surfaces of the lower housing and the upper housing are respectively provided with a plurality of second screw holes, and the lower housing and the upper housing are respectively provided with third screw holes corresponding to the second screw holes; the measuring housing and the lower housing are fixedly connected by screws through the second screw holes and the third screw holes, and the side housing and the upper housing are fixedly connected by screws through the second screw holes and the third screw holes.

4. The integrated polarization-maintaining fiber optic acousto-optic modulator according to claim 1, characterized in that: The acousto-optic modulator includes an input optical fiber, an acousto-optic converter, and an output optical fiber. The input optical fiber and the output optical fiber are fixed by optical fiber fixing brackets. The axes of the end of the input optical fiber and the starting end of the output optical fiber are on the same straight line. The acousto-optic converter is located between the end of the input optical fiber and the starting end of the output optical fiber.

5. The integrated polarization-maintaining fiber optic acousto-optic modulator according to claim 4, characterized in that: The acousto-optic converter and the driver are connected by a metal wire.

6. The integrated polarization-maintaining fiber optic acousto-optic modulator according to claim 4, characterized in that: The center points of the input through-hole and the output through-hole are both located on the line connecting the axis of the end of the input optical fiber and the starting end of the output optical fiber. The input optical fiber passes through the input through-hole, and the output optical fiber passes through the output through-hole.

7. The integrated polarization-maintaining fiber optic acousto-optic modulator according to claim 1, characterized in that: The driver includes a driver circuit board, a power supply interface, and a modulation signal interface; The power supply interface is used to connect an external power supply to power the driver circuit board, and the modulation signal interface is connected to the driver circuit board. The output of the drive circuit board is connected to the acousto-optic modulator to output a drive signal to the acousto-optic modulator; The power supply interface passes through the power supply through hole, and the modulation signal interface passes through the modulation signal through hole.

8. The integrated polarization-maintaining fiber optic acousto-optic modulator according to claim 1, characterized in that: The modulation signal interface includes an RF coaxial cable interface.

9. The integrated polarization-maintaining fiber optic acousto-optic modulator according to claim 1, characterized in that: Both the input through-hole and the output through-hole are provided with rubber protective pads.

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