Acousto-optic rapid optical shutter

Abstract

The invention belongs to the technical field of laser, and particularly relates to an acousto-optic rapid optical shutter which comprises a plurality of optical fiber coupling type acousto-optic modulators, and radio frequency ports are formed in the middle portions of the optical fiber coupling type acousto-optic modulators so that when laser enters from light inlets of the optical fiber coupling type acousto-optic modulators, the optical fiber coupling type acousto-optic modulators can emit light to the optical fiber coupling type acousto-optic modulators. A laser 1 and a laser 0 with different powers can be generated according to radio frequency power received by a radio frequency port, the laser 1 and the laser 0 are irradiated out from a light outlet 1 and a light outlet 0 corresponding to the optical fiber coupling type acousto-optic modulator respectively, and the light outlet 1 and the light outlet 0 are connected with an optical fiber through connectors. According to the optical fiber coupling type acousto-optic modulator, the plurality of acousto-optic modulators form the optical shutter, so that the optical fiber coupling type acousto-optic modulator has the advantages that the transmission of light can be quickly controlled, no mechanical device exists, and quick switching can be realized.

Description

Technical Field

[0001] The present invention relates to the field of laser technology, and particularly to an acousto-optic fast optical shutter. Background Art

[0002] An optical shutter is a device applied to a continuous fiber laser for quickly switching the optical propagation direction. However, when the current optical shutter is in use, it basically controls the optical transmission direction through a mechanical structure using the principle of optical reflection, and thus there will be problems of slow speed and poor reliability. Therefore, an acousto-optic fast optical shutter is invented. Summary of the Invention

[0003] In view of the above and / or existing problems in an acousto-optic fast optical shutter, the present invention is proposed.

[0004] Therefore, the purpose of the present invention is to provide an acousto-optic fast optical shutter that can solve the above-mentioned existing problems.

[0005] To solve the above technical problems, according to one aspect of the present invention, the following technical solutions are provided:

[0006] An acousto-optic fast optical shutter includes a plurality of fiber-coupled acousto-optic modulators. A radio frequency port is provided in the middle of the fiber-coupled acousto-optic modulator, so that when laser enters from the light input port of the fiber-coupled acousto-optic modulator, 1-laser and 0-laser with different powers can be generated according to the radio frequency power received by the radio frequency port, and are respectively irradiated out from the corresponding 1-light output port and 0-light output port on the fiber-coupled acousto-optic modulator. Both the 1-light output port and the 0-light output port are connected to fibers through connectors, and the other ends of the fibers are connected to the light input ports of other fiber-coupled acousto-optic modulators through connectors, and the 1-light output port and the 0-light output port are adjusted as incident light with the light input ports of subsequent other acousto-optic modulators.

[0007] As a preferred scheme of an acousto-optic fast optical shutter according to the present invention, wherein: the powers of the 1-laser and the 0-laser are calculated based on the formula of Bragg diffraction efficiency, and the specific formula is as follows:

[0008]

[0009] Wherein, the diffracted light intensity is proportional to the acoustic power Pa, and Pa is proportional to the radio frequency power P0.

[0010] As a preferred scheme of an acousto-optic fast optical shutter according to the present invention, wherein: when the radio frequency power P0 is 0, Pa is also 0. At this time, the 1-light output port does not pass laser, and the 0-light output port passes laser.

[0011] Compared with the prior art:

[0012] 1. By forming an optical shutter with a number of acousto-optic modulators, it is possible to quickly control the transmission of light. Without mechanical devices, fast switching can be achieved.

[0013] 2. By connecting a number of fiber-coupled acousto-optic modulators together through an optical fiber, the position of the fiber-coupled acousto-optic modulators does not need to be limited, which to a certain extent increases the scope of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the optical shutter of the present invention;

[0015] Figure 2 It is a schematic diagram of the principle of the fiber-coupled acousto-optic modulator of the present invention.

[0016] In the figure: fiber-coupled acousto-optic modulator 10, light input port 11, 1 light output port 12, 0 light output port 13, radio frequency port 14. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] To make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] The present invention provides a fast acousto-optic optical shutter. Please refer to Figure 1 - Figure 2 , which includes a number of fiber-coupled acousto-optic modulators 10. A radio frequency port 14 is provided in the middle of the fiber-coupled acousto-optic modulator 10. When laser light enters from the light input port 11 of the fiber-coupled acousto-optic modulator 10, 1 laser light and 0 laser light with different powers can be generated according to the radio frequency power received by the radio frequency port 14, and are respectively irradiated out from the corresponding 1 light output port 12 and 0 light output port 13 on the fiber-coupled acousto-optic modulator 10. Both the 1 light output port 12 and the 0 light output port 13 are connected to an optical fiber through a connector, and the other end of the optical fiber is connected to the light input port 11 of other fiber-coupled acousto-optic modulators 10 through a connector, and the 1 light output port 12 and the 0 light output port 13 are adjusted as incident light with the light input port 11 of subsequent other acousto-optic modulators 10. Specifically: as Figure 1As shown in the figure, the 1-light outlet 12 on the A fiber-coupled acousto-optic modulator 10 is connected to the light input port 11 on the B1 fiber-coupled acousto-optic modulator 10 through a laser fiber; the 0-light outlet 13 on the A fiber-coupled acousto-optic modulator 10 is connected to the light input port 11 on the B2 fiber-coupled acousto-optic modulator 10 through a laser fiber; the 1-light outlet 12 on the B1 fiber-coupled acousto-optic modulator 10 is connected to the light input port 11 on the C1 fiber-coupled acousto-optic modulator 10 through a laser fiber; the 0-light outlet 13 on the B1 fiber-coupled acousto-optic modulator 10 is connected to the light input port 11 on the C2 fiber-coupled acousto-optic modulator 10 through a laser fiber; the 1-light outlet 12 on the B2 fiber-coupled acousto-optic modulator 10 is connected to the light input port 11 on the C3 fiber-coupled acousto-optic modulator 10 through a laser fiber; the 0-light outlet 13 on the B2 fiber-coupled acousto-optic modulator 10 is connected to the light input port 11 on the C4 fiber-coupled acousto-optic modulator 10 through a laser fiber, and so on. Among them, the number of fiber-coupled acousto-optic modulators 10 can be set according to requirements.

[0019] The generation powers of 1-laser and 0-laser are calculated based on the formula of Bragg diffraction efficiency, and the specific formula is as follows:

[0020]

[0021] Among them, the diffracted light intensity is proportional to the acoustic power Pa, and Pa is proportional to the radio frequency power P0; in addition, the professional term of 1-laser is called +1 or -1 order diffracted light, and 0-laser is 0 order diffracted light, and the above formula is for 1 order diffracted light.

[0022] When the radio frequency power P0 is 0, Pa is also 0. At this time, the 1-light outlet does not pass through the laser (usually called +1 order diffracted light), and the 0-light outlet passes through the laser (usually called 0 order diffracted light).

[0023] For example: as Figure 1 shown:

[0024] If it is necessary for the light to pass through the B2 fiber-coupled acousto-optic modulator 10, then the radio frequency power transmitted by the radio frequency port 14 in the A fiber-coupled acousto-optic modulator 10 needs to be 0. At this time, the light can be prevented from entering the B1 fiber-coupled acousto-optic modulator 10.

[0025] Among them, the fiber-coupled acousto-optic modulator 10 can be a polarization-maintaining fiber, or a non-polarization-maintaining fiber can be selected according to the type of fiber laser. When a non-polarization-maintaining fiber is selected, the fiber-coupled acousto-optic modulator 10 is designed to be polarization-independent.

[0026] Although the present invention has been described above with reference to the embodiments, various modifications thereof can be made and components thereof can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed by the present invention can be combined with each other in any way, and the exhaustive description of these combinations is not given in this specification only for the consideration of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An acousto-optic fast shutter, characterized in that, Including a number of fiber-coupled acousto-optic modulators, a radio frequency port is provided in the middle of the fiber-coupled acousto-optic modulator, so that when the laser enters from the light input port of the fiber-coupled acousto-optic modulator, 1-laser and 0-laser with different powers can be generated according to the radio frequency power received by the radio frequency port, and are respectively irradiated out from the corresponding 1-light output port and 0-light output port on the fiber-coupled acousto-optic modulator. Both the 1-light output port and the 0-light output port are connected to the optical fiber through connectors, and the other end of the optical fiber is connected to the light input port of other fiber-coupled acousto-optic modulators through connectors, and the 1-light output port and the 0-light output port are adjusted well as incident light with the light input ports of subsequent other acousto-optic modulators.

2. The acousto-optic fast shutter according to claim 1, characterized in that The generation powers of the 1-laser and the 0-laser are calculated based on the formula of the Bragg diffraction efficiency, and the specific formula is as follows: Among them, the diffracted light intensity is proportional to the acoustic power Pa, and Pa is proportional to the radio frequency power P0.

3. The acousto-optic fast shutter according to claim 2, characterized in that, When the radio frequency power P0 is 0, Pa is also 0. At this time, the 1-light output port does not pass the laser, and the 0-light output port passes the laser.

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