Laser with low-voltage driven electro-optical crystal

Abstract

The invention discloses a laser with a low-voltage driven electro-optical crystal. The laser is characterized by sequentially comprising a first cavity mirror, a gain medium, a polarizing film, an electro-optical crystal, a wave plate, a second cavity mirror and a driving power supply for the electro-optical crystal, which have the same optical axis, wherein the polarizing film forms a certain angle with the optical axis; and the two ends of the electro-optical crystal are connected with the adjustable driving power supply. The laser has the advantages that driving voltage to be applied to the electro-optical crystal is low, so that the manufacture difficulty and cost of the driving power supply for the electro-optical crystal are greatly lowered, and the stability and reliability of the laser are improved; and the polarization coupling output rate of the laser can be controlled by changing the driving voltage of the electro-optical crystal.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a laser for driving an electro-optic crystal with a low voltage. At the same time, the polarization coupling output rate of the laser can be controlled by changing the driving voltage of the electro-optic crystal. Background technique [0002] The electro-optic Q-switching switch uses the electro-optic effect of certain crystals to realize the adjustment of the Q value in the laser resonator. The electro-optic Q-switching switch has the advantages of short switching time, high efficiency, precise control of Q-switching time, narrow laser output pulse width, and high peak power. It is a Q-switching technology widely used at present. [0003] Traditional electro-optic Q-switched lasers generally use polarizers and electro-optic crystals to form a Q switch. According to the physical principle of electro-optic Q-switching, it is generally necessary to add a half-wave volt...

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Problems solved by technology

However, the method of increasing the aspect ratio to reduce the half-wave voltage also has some insurmountable disadvantages: first, the larger the size of the crystal, the more difficult it is to grow, and the higher the cost; second, the single reduction of the distance between the electrodes, although lower half-wave voltage, but also limits the clear aperture

[0004] also, Figure 1 The laser coupling output rate shown is determined by the transmittance of the mirror (1-1), and its coupling output rate can only be a fixed value. To change the coupling output rate, it is necessary to replace the transflector with a different transmittance. mirror, it is impossible to adjust the coupling output ratio without replacing the laser resonator components

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