Acousto-optic Q switch and laser device

Abstract

The invention discloses an acousto-optic Q switch and a laser device. The acousto-optic Q switch comprises a first collimator, acousto-optic crystal and a second collimator, wherein the first collimator, the acousto-optic crystal and the second collimator are sequentially arranged along the propagation direction of light; the first collimator and the second collimator are coaxially arranged; and a light outlet angle of the first collimator is a bragg angle. In the manner, the dimming frequency of each collimator can be reduced; and the dimming of each collimator is relatively simple and convenient.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to an acousto-optic Q switch and a laser device. Background technique [0002] Laser pulses with large energy and high peak power can be generated by using Q-switching technology. The principle of the Q-switching switch of the laser is that when the Q-switching switch is turned off, the laser resonator is in a state of low Q value, the loss is large, the oscillation threshold is high, and the laser oscillation cannot be formed in the resonator. Under the action of the pump source, the laser medium When the number of upper-level inversion particles accumulates in a large amount, when the accumulation reaches the maximum value (saturation value), the Q-switching switch is quickly turned on, the laser resonator is in a high-Q state, the loss is greatly reduced, the oscillation threshold is suddenly reduced, and the laser oscillation is rapidly established. In a very short period of tim...

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Problems solved by technology

[0004] In the existing acousto-optic Q switch, since the light from the collimator is collimated light, an adjustment frame is usually required to adjust the deflection angle of the collimator so that the light emitted from the collimator enters the acousto-optic light at the Bragg angle. In the crystal, the Bragg diffraction requirements of the acousto-optic crystal to the light can be met. However, in the above method, because the deflection angle of the collimator needs to be adjusted, the light adjustment is more cumbersome, and a space for adjusting the angle needs to be reserved, so the collimator The fixed space is large and the stability is not good

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