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CN-224217896-U - Reflective acousto-optic Q switch and Q-switched laser

CN224217896UCN 224217896 UCN224217896 UCN 224217896UCN-224217896-U

Abstract

The utility model discloses a reflective acousto-optic Q switch and a Q-switched laser, and belongs to the technical field of optical devices. The reflective acousto-optic Q switch comprises an encapsulation metal shell, an optical fiber collimator arranged on a first side wall of the encapsulation metal shell, an acousto-optic crystal arranged in the encapsulation metal shell, an electroacoustic transducer arranged on the surface of the acousto-optic crystal, a space reflection unit arranged in the encapsulation metal shell, and a space reflection unit comprising a first reflection piece, a second reflection piece and a third reflection piece, wherein the first reflection piece is arranged on one side of the acousto-optic crystal in the light emitting direction of the optical fiber collimator, the second reflection piece is arranged on the other side of the acousto-optic crystal with a reflection surface, and the third reflection piece is arranged on one side of the second reflection piece close to the first side wall and used for receiving light reflected by the second reflection piece and reflecting the light back to the second reflection piece in an original way. The utility model can reduce the volume of the acousto-optic Q switch and is beneficial to the miniaturization of equipment.

Inventors

  • JIANG FENG
  • YANG QINGFENG
  • LV ZHANGYONG
  • TANG FANGYU
  • WU LIANGLIANG
  • CHEN WEISHEN
  • MA HANCHAO

Assignees

  • 深圳市创鑫激光股份有限公司
  • 苏州创鑫激光科技有限公司
  • 深圳市嘉鑫激光科技有限公司

Dates

Publication Date
20260508
Application Date
20250526

Claims (10)

  1. 1. Reflective acousto-optic Q switch, its characterized in that includes: Encapsulating the metal shell (100); An optical fiber collimator (200) provided on a first side wall (1001) of the package metal case (100); An acousto-optic crystal (300) positioned in the packaging metal shell (100), and an electroacoustic transducer (400) is arranged on the acousto-optic crystal (300); The space reflection unit is positioned in the packaging metal shell (100), and comprises a first reflection piece (500), a second reflection piece (600) and a third reflection piece (700), wherein the first reflection piece (500) is arranged on one side of the acousto-optic crystal (300) in the light emergent direction of the optical fiber collimator (200) and is used for receiving and reflecting incident light so that the incident light passes through the acousto-optic crystal (300), the second reflection piece (600) is arranged on the other side of the acousto-optic crystal (300) and is used for receiving and reflecting first-order diffraction light, and the third reflection piece (700) is positioned on one side of the second reflection piece (600) and is used for receiving light reflected by the second reflection piece (600) and reflecting the light back to the second reflection piece (600) in the original way.
  2. 2. The reflective acousto-optic Q-switch of claim 1, wherein the first, second and third reflectors (500, 600, 700) are total reflection film coated reflectors.
  3. 3. The reflective acousto-optic Q-switch according to claim 1, wherein the second reflective element (600) is a planar mirror, and the reflective surface forms an angle of 45 ° ± 5 ° with respect to the first order diffracted light exit direction of the acousto-optic crystal (300).
  4. 4. The reflective acousto-optic Q-switch according to claim 1, further comprising a lead (800) and a radio frequency wire connector (900), wherein a first end of the lead (800) is threaded through the first sidewall (1001) of the package metal shell (100) and is connected to the electroacoustic transducer (400), and a second end of the lead (800) is connected to the radio frequency wire connector (900), and wherein a diameter dimension of the lead (800) is smaller than a diameter dimension of the radio frequency wire connector (900).
  5. 5. The reflective acousto-optic Q-switch according to claim 4, wherein the lead (800) comprises a wire and an insulating protective layer, the insulating protective layer being wrapped around a surface of the wire.
  6. 6. The reflective acousto-optic Q-switch according to claim 1, wherein a beam expanding fiber is arranged in the fiber collimator (200), and the diameter of the beam expanding fiber is 100 μm-110 μm.
  7. 7. The reflective acousto-optic Q-switch according to claim 1, wherein a fixing tube (1000) is provided at a position where the optical fiber collimator (200) is mounted on the package metal case (100), and the optical fiber collimator (200) is inserted into the fixing tube (1000).
  8. 8. The reflective acousto-optic Q-switch according to claim 7, wherein the material of the stationary tube (1000) is a low expansion coefficient alloy.
  9. 9. The reflective acousto-optic Q-switch according to claim 1, wherein a plurality of connection holes (1002) are provided on the packaging metal case (100), and a fastener can pass through the connection holes (1002) to be connected with an external fixture.
  10. 10. A Q-switched laser, comprising a radio frequency drive power supply and a reflective acousto-optic Q-switch as claimed in any of claims 1 to 9, wherein an electroacoustic transducer (400) of the reflective acousto-optic Q-switch is connected to an output of the radio frequency drive power supply.

Description

Reflective acousto-optic Q switch and Q-switched laser Technical Field The utility model relates to the technical field of optical devices, in particular to a reflective acousto-optic Q switch and a Q-switched laser. Background The acousto-optic Q-switch is used as a key component in a laser cavity, and the working principle of the acousto-optic Q-switch is to adjust the output state of laser by introducing controlled variable loss. This adjustment mechanism enables the otherwise continuous laser power to be converted into laser pulses with high peak power, thereby meeting a variety of application requirements. In the laser ranging field, a high peak power laser pulse can more accurately measure distance, in the communication field, it can improve signal transmission efficiency and anti-interference capability, in the precision machining field, a high peak power laser pulse can achieve finer machining effect, and in medical equipment, it can be used for more accurate laser treatment. Therefore, the reflective acousto-optic Q-switch plays an important role in various fields. However, the prior art has the problems in the implementation process that the acousto-optic Q switch on the market at present mostly adopts a double-fiber collimator structure and has a large structure. The structure requires that the fiber positions of optical fibers at two sides and the occupied area of the whole structure must be considered when the laser is designed, and the length of the acousto-optic Q switch is increased, so that the whole structure of the laser needs larger space, and the miniaturization of equipment is not facilitated. This section provides background information related to the application, which is not necessarily prior art. Disclosure of utility model The utility model aims to provide a reflective acousto-optic Q switch and a Q-switched laser, which can reduce the number of optical fiber collimators and contribute to the miniaturization of equipment. In order to achieve the above object, the following technical scheme is provided: A reflective acousto-optic Q-switch comprising: Packaging the metal shell; The optical fiber collimator is arranged on the first side wall of the packaging metal shell; The acousto-optic crystal is positioned in the packaging metal shell, and the electroacoustic transducer is arranged on the surface of the acousto-optic crystal; The space reflection unit is positioned in the packaging metal shell and comprises a first reflection piece, a second reflection piece and a third reflection piece, wherein the first reflection piece is arranged on the light emergent direction of the optical fiber collimator and positioned on one side of the acousto-optic crystal, so that incident light passes through the acousto-optic crystal and is used for receiving and reflecting the incident light, the second reflection piece is arranged on the other side of the acousto-optic crystal and is used for receiving and reflecting first-order diffraction light, and the third reflection piece is positioned on one side of the second reflection piece and is used for receiving the light reflected by the second reflection piece and reflecting the light back to the second reflection piece in an original way. As an alternative scheme of the reflective acousto-optic Q-switch, the first reflecting member, the second reflecting member and the third reflecting member are reflecting mirrors coated with a total reflection film. As an alternative scheme of the reflective acousto-optic Q switch, the second reflecting piece is a plane reflecting mirror, and the reflecting surface forms an included angle of 45+/-5 degrees with the emergent direction of the first-order diffraction light of the acousto-optic crystal. As an alternative scheme of the reflection type acousto-optic Q switch, the reflection type acousto-optic Q switch further comprises a lead and a radio frequency wire connector, wherein a first end of the lead penetrates through the first side wall of the packaging metal shell and is connected with the electroacoustic transducer, a second end of the lead is connected with the radio frequency wire connector, and the diameter size of the lead is smaller than that of the radio frequency wire connector. As an alternative scheme of the reflective acousto-optic Q-switch, the lead comprises a wire and an insulating protection layer, and the insulating protection layer is wrapped on the surface of the wire. As an alternative scheme of the reflective acousto-optic Q switch, the insulating protection layer is made of plastic or rubber. As an alternative scheme of the reflective acousto-optic Q switch, a beam expansion optical fiber is arranged in the optical fiber collimator, and the diameter of the beam expansion optical fiber is 100-110 mu m. As an alternative scheme of the reflective acousto-optic Q switch, a fixing tube is arranged at the position where the optical fiber collimator is mounted on the packaging metal shell,