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Acousto-optic modulator, method for improving output light energy of acousto-optic modulator and laser

An acousto-optic modulator and laser technology, applied in the field of lasers, can solve problems such as leakage light and energy waste, and achieve the effect of improving energy conversion rate and utilization rate

Active Publication Date: 2017-08-25
MAXPHOTONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the technical problem that the prior art utilizes Bragg diffracted light but leaks the light propagating in the original propagation direction, resulting in energy waste, and provides an acousto-optic modulator, a method for increasing the output light energy of the acousto-optic modulator, and a laser

Method used

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  • Acousto-optic modulator, method for improving output light energy of acousto-optic modulator and laser
  • Acousto-optic modulator, method for improving output light energy of acousto-optic modulator and laser
  • Acousto-optic modulator, method for improving output light energy of acousto-optic modulator and laser

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Embodiment 1

[0037] figure 1 It is a schematic diagram of an acousto-optic modulator according to an embodiment of the present invention. Such as figure 1 As shown, the acousto-optic modulator 10 includes an acousto-optic crystal 101 , a piezoelectric transducer 102 and a driving power source 103 . The electrical signal of the driving power supply 103 drives the piezoelectric transducer. When the AOM 10 has a pulse signal, that is, when the pulse signal is at a high level, the refractive index of the acousto-optic crystal in the AOM will change from density to density. form a raster. At this time, if the incident light passes through the acousto-optic crystal at the Bragg angle θB, diffraction will occur, causing the light to be deflected and deviate from the original propagation direction, and the deflected light is +1 order light. When the acousto-optic modulator has no pulse signal, that is, when the pulse signal is at a low level, the refractive index of the acousto-optic crystal wi...

Embodiment 2

[0053] Figure 6 It is a schematic diagram of the optical path of the laser 200 according to the embodiment of the present invention. The laser 200 is a Q-switched fiber laser, and its optical path structure is composed of four parts. The first part is LD, that is, the pump source 210, which is used to provide the energy required for the first-stage amplification; the second part is the first-stage amplification optical path 220, usually It consists of a section of gain fiber, which is used to convert the pump light output by the pump source 210 into signal light, and amplifies the signal light at the same time; the third part is an acousto-optic modulator 230, which is used to adjust the pulse width. The third part is the secondary amplification optical circuit 240, which is used to amplify the signal light again, so that the energy of the signal light reaches a certain energy value; the fifth part is the output optical isolator 250, which is used to output the signal light w...

Embodiment 3

[0060] Figure 7 It is a flow chart of a method for increasing output light energy of an acousto-optic modulator according to an embodiment of the present invention. Such as Figure 7 As shown, in the method for improving the output light energy of the AOM, the AOM includes an AOM crystal, and the AOM also includes a -1-level collimator, a +1-level collimator, and a time delay An optical fiber and a beam combiner; the method comprising:

[0061] Step 301: Incident light enters the acousto-optic crystal and emits -1 order light and +1 order light respectively;

[0062] Step 302: the -1-level collimator receives -1-level light; the +1-level collimator receives +1-level light;

[0063] Step 303: Connect the delay fiber to the output direction of the +1-level collimator so that the +1-level light is delayed for a preset time and coincides with the -1-level light in timing, and the delay fiber is collimated with the -1-level light The output direction of the beam combiner is co...

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Abstract

The embodiment of the invention discloses an acousto-optic modulator, a method for improving the output light energy of the acousto-optic modulator and a laser. The acousto-optic modulator comprises an acousto-optic crystal, an incident-light and incident-sound light crystal emits level +1 light and level -1 light sequentially; a delay fiber is connected at the emitting direction of the level +1 collimator so that the level +1 light delays the preset time and coincides with the level -1 light in the time series; the delay fiber and the emitting direction of a level -1 collimator are respectively connected with a beam combiner, the level -1 light and the delayed level +1 light are beam-combined and output by the beam combiner. As a result, the level -1 light, that is, the light propagated in the original propagation direction is also used, not leaked, thereby improving the energy conversion rate and utilization rate.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of lasers, and in particular, to an acousto-optic modulator, a method for increasing the output light energy of the acousto-optic modulator, and a laser. Background technique [0002] The optical path structure of the Q-switched fiber laser includes an acousto-optic modulator, which is used to adjust the width of the pulse. [0003] In the Q-switched fiber laser, there is the following problem. Only the Bragg diffracted light generated by the acousto-optic modulator is used, and the light propagating in the original propagation direction (incident direction) is not used but leaked, resulting in waste of energy. . Contents of the invention [0004] The present invention aims at the technical problem that the prior art utilizes Bragg diffracted light but leaks the light propagating in the original propagation direction, resulting in energy waste, and provides an acousto-optic modul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/125H01S3/117
CPCG02F1/125H01S3/117
Inventor 符照森曹际龙张浩泰李伟蒋峰
Owner MAXPHOTONICS CORP
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