Novel acousto-optic modulator

Abstract

The utility model discloses a novel acousto-optic modulator, which relates to the technical field of integrated photonics and comprises a bottom fixing plate, an acousto-optic modulator body is fixedly mounted at the upper end of the bottom fixing plate, and a sealing cover plate is detachably mounted on the upper surface of the acousto-optic modulator body. A thin film layer is installed in the acousto-optic modulator body. According to the novel acousto-optic modulator, the film layer, the epoxy resin, the film waveguide, the ceramic limiting part and the electro-acoustic transducer are arranged, the epoxy resin and the ceramic limiting part can fix the position of the film layer and improve the temperature stability, the interruption part of the film waveguide is separated, and three groups of electrodes are uniformly dispersed; compared with the prior art, better light spot quality and output waveform can be obtained, the modulation frequency is improved, the sealing cover plate is arranged on the surface of the acousto-optic modulator, internal parts of the acousto-optic modulator body can be maintained and replaced after the acousto-optic modulator is detached, the whole acousto-optic modulator does not need to be detached, and maintenance is very convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of integrated photonics, in particular to a novel acousto-optic modulator. Background Art

[0002] At present, acousto-optic modulation is a physical process that uses the acousto-optic effect to load information onto an optical frequency carrier. The modulation signal acts on the electroacoustic transducer in the form of an electrical signal (amplitude modulation), and is converted into an ultrasonic field that changes in the form of an electrical signal through the electroacoustic converter. When the light wave passes through the acousto-optic medium, the optical carrier is modulated due to the acousto-optic effect and becomes an intensity modulated wave that carries information. Thin-film acousto-optic modulators have a much higher modulation frequency than direct modulation technology of light sources, lower driving power, better temperature stability, better light spot quality, and better output waveform.

[0003] For example, the utility model with patent number CN202110606401.1 discloses a groove-assisted acousto-optic modulator based on lithium niobate film, wherein the acousto-optic modulator includes: a lithium niobate film layer; a lithium niobate film waveguide and an interdigital transducer arranged on the lithium niobate film layer, wherein the top of the lithium niobate film waveguide is engraved with a groove. Since the optical waveguide structures used in conventional acousto-optic modulators designed based on lithium niobate film are all regular strip waveguides, the acoustic-optic interaction efficiency of regular strip waveguides based on surface acoustic waves is not high, and the present invention has grooves engraved on the top of the lithium niobate film waveguide, which can enhance the interaction between the deformation displacement field generated by the lithium niobate film waveguide based on surface acoustic waves and the optical electromagnetic field of the waveguide, thereby solving the problem of low acoustic-optic interaction efficiency in existing acousto-optic modulators;

[0004] The acousto-optic modulator in this patent has poor temperature stability during use, the waveguide optical electromagnetic field is a linear structure, there is no better light spot quality and output waveform, and the modulation frequency is low. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a novel acousto-optic modulator, which solves the problem of low modulation frequency of the acousto-optic modulator.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: a new type of acousto-optic modulator, including a bottom fixing plate, an acousto-optic modulator body is fixedly installed on the upper end of the bottom fixing plate, a sealing cover plate is detachably installed on the upper surface of the acousto-optic modulator body, a thin film layer is installed inside the acousto-optic modulator body, an epoxy resin is arranged on the lower side of the thin film layer, a thin film waveguide is fixedly installed on the upper end of the epoxy resin, a ceramic limit is arranged on the lower side of the epoxy resin, an electroacoustic transducer is installed at the bottom of the acousto-optic modulator body, a first connecting line is arranged at one end of the acousto-optic modulator body, and a second connecting line is arranged at the other end of the acousto-optic modulator body.

[0007] Preferably, uniformly distributed electrodes are arranged inside the thin film layer, and there are three groups of electrodes in total. The electrodes are arranged on both sides and in the middle of the thin film waveguide, respectively.

[0008] Preferably, a boss is provided on the upper surface of the AOM body, a first groove is formed on the surface of the boss, and the sealing cover plate is detachably installed inside the first groove.

[0009] Preferably, a metal pressing sheet handle is provided at the upper end of the sealing cover plate, and the metal pressing sheet handle is mounted on the sealing cover plate by bolts.

[0010] Preferably, second grooves are provided on both sides of the AOM body, and the first connecting wire and the second connecting wire are arranged in the middle of the second grooves.

[0011] Preferably, connecting ear plates are welded on both sides of the bottom fixing plate, and mounting holes are opened on the surfaces of the connecting ear plates.

[0012] Preferably, a connecting plate is installed on the outside of the AOM body by bolts, and a power connector is welded on the connecting plate.

[0013] Beneficial Effects

[0014] The utility model provides a novel acousto-optic modulator. Compared with the prior art, it has the following beneficial effects:

[0015] The novel acousto-optic modulator is provided with a thin film layer, epoxy resin, thin film waveguide, ceramic limiter and electroacoustic transducer. The epoxy resin and ceramic limiter can fix the position of the thin film layer and improve the temperature stability. The interrupted part of the thin film waveguide is separated and three groups of electrodes are evenly dispersed, so that better light spot quality and output waveform can be obtained and the modulation frequency can be improved. A sealing cover plate is provided on the surface of the acousto-optic modulator. After disassembly, the internal parts of the acousto-optic modulator body can be repaired and replaced without disassembling the entire acousto-optic modulator, which is very convenient for repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the internal structure of the acousto-optic modulator body in the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the thin film waveguide in the utility model.

[0019] In the figure: 1. bottom fixing plate; 2. AOM body; 201. second groove; 3. sealing cover plate; 4. thin film layer; 5. thin film waveguide; 6. electrode; 7. epoxy resin; 8. ceramic limiter; 9. metal pressing handle; 10. first groove; 11. first connecting line; 12. second connecting line; 13. connecting plate; 14. power connector; 15. connecting ear plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3 The utility model provides a technical solution: a novel acousto-optic modulator, comprising a bottom fixing plate 1, an acousto-optic modulator body 2 is fixedly installed on the upper end of the bottom fixing plate 1, a sealing cover plate 3 is detachably installed on the upper surface of the acousto-optic modulator body 2, a thin film layer 4 is installed inside the acousto-optic modulator body 2, an epoxy resin 7 is arranged on the lower side of the thin film layer 4, a thin film waveguide 5 is fixedly installed on the upper end of the epoxy resin 7, a ceramic limiter 8 is arranged on the lower side of the epoxy resin 7, the epoxy resin 7 and the ceramic limiter 8 can fix the position of the thin film layer 4 and improve the temperature stability, an electroacoustic transducer is installed at the bottom of the acousto-optic modulator body 2, a first connecting line 11 is arranged at one end of the acousto-optic modulator body 2, and a second connecting line 12 is arranged at the other end of the acousto-optic modulator body 2, and the acousto-optic modulator body 2 can be connected to other devices by arranging the first connecting line 11 and the second connecting line 12.

[0022] The thin film layer 4 is provided with uniformly distributed electrodes 6, and there are three groups of electrodes 6 in total. The electrodes 6 are respectively provided on both sides and in the middle of the thin film waveguide 5. By providing the electrodes 6, better light spot quality and output waveform can be obtained, and the modulation frequency can be improved. A boss is provided on the upper surface of the acousto-optic modulator body 2, and a first groove 10 is provided on the surface of the boss. The sealing cover plate 3 is detachably installed in the first groove 10. A metal pressing handle 9 is provided on the upper end of the sealing cover plate 3. The metal pressing handle 9 is installed on the sealing cover plate 3 by bolts. By providing the sealing cover plate 3, the acousto-optic modulator can be removed after disassembly. The internal parts of the AOM body 2 can be repaired and replaced without disassembling the entire AOM, which is very convenient for maintenance. Second grooves 201 are provided on both sides of the AOM body 2, the first connecting line 11 and the second connecting line 12 are arranged in the middle of the second groove 201, connecting ear plates 15 are welded on both sides of the bottom fixing plate 1, and mounting holes are provided on the surface of the connecting ear plates 15. A connecting plate 13 is installed on the outside of the AOM body 2 by bolts, and a power connector 14 is welded on the connecting plate 13. By setting the power connector 14, the AOM body 2 can be powered on and used normally.

[0023] During operation, the AOM body 2 is first fixed to the required installation position with bolts, and then the first connecting line 11 and the second connecting line 12 are respectively connected to other devices or connecting lines, so that the AOM body 2 can be used normally. The epoxy resin 7 and the ceramic limiter 8 can fix the position of the thin film layer 4 and improve the temperature stability. The interrupted part of the thin film waveguide 5 is separated, and three groups of electrodes 6 are arranged to be evenly dispersed, so that better light spot quality and output waveform can be obtained, and the modulation frequency can be improved. A sealing cover plate 3 is arranged on the surface of the AOM. After disassembly, the internal components of the AOM body 2 can be repaired and replaced without disassembling the entire AOM, which is very convenient for maintenance.

[0024] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A novel acousto-optic modulator, comprising a bottom fixing plate (1), characterized in that: An acousto-optic modulator body (2) is fixedly mounted on the upper end of the bottom fixing plate (1); a sealing cover plate (3) is detachably mounted on the upper surface of the acousto-optic modulator body (2); a thin film layer (4) is mounted inside the acousto-optic modulator body (2); an epoxy resin (7) is arranged on the lower side of the thin film layer (4); a thin film waveguide (5) is fixedly mounted on the upper end of the epoxy resin (7); a ceramic limiter (8) is arranged on the lower side of the epoxy resin (7); an electroacoustic transducer is mounted on the bottom of the acousto-optic modulator body (2); a first connecting line (11) is arranged at one end of the acousto-optic modulator body (2); and a second connecting line (12) is arranged at the other end of the acousto-optic modulator body (2).

2. The novel acousto-optic modulator according to claim 1, characterized in that: Evenly distributed electrodes (6) are arranged inside the thin film layer (4), and a total of three groups of electrodes (6) are arranged. The electrodes (6) are respectively arranged on both sides and in the middle of the thin film waveguide (5).

3. The novel acousto-optic modulator according to claim 1 is characterized in that: The upper surface of the acousto-optic modulator body (2) is provided with a boss, the surface of the boss is provided with a first groove (10), and the sealing cover plate (3) is detachably mounted inside the first groove (10).

4. The novel acousto-optic modulator according to claim 1 is characterized in that: A metal pressing handle (9) is provided at the upper end of the sealing cover plate (3), and the metal pressing handle (9) is mounted on the sealing cover plate (3) by means of bolts.

5. The novel acousto-optic modulator according to claim 1 is characterized in that: Second grooves (201) are provided on both sides of the acousto-optic modulator body (2), and the first connecting line (11) and the second connecting line (12) are arranged in the middle of the second grooves (201).

6. The novel acousto-optic modulator according to claim 1 is characterized in that: Connecting ear plates (15) are welded on both sides of the bottom fixing plate (1), and mounting holes are provided on the surfaces of the connecting ear plates (15).

7. The novel acousto-optic modulator according to claim 1 is characterized in that: A connecting plate (13) is installed on the outside of the acousto-optic modulator body (2) via bolts, and a power connector (14) is welded to the connecting plate (13).

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