Electro-optic Q-switch pulse laser with controllable single-pulse beam splitting ratio

Abstract

The invention provides an electro-optic Q-switch pulse laser with the controllable single-pulse beam splitting ratio. The electro-optic Q-switch pulse laser comprises a laser generating unit, a Faraday activizer, a polarization beam splitter and a control unit. The laser generating unit generates electro-optic Q-switch laser pulses. The polarization directions of the electro-optic Q-switch laser pulses are rotated through the Faraday activizer. The electro-optic Q-switch laser pulses are split by the polarization beam splitter into first laser pulses and second laser pulses. The control unit is electrically connected with a laser pumping unit and an electro-optic Q-switch unit in the laser generating unit and the Faraday activizer. According to the electro-optic Q-switch pulse laser, the polarization directions of the electro-optic Q-switch laser pulses are rotated by different angles through the Faraday activizer according to the preset beam splitting ratio so that the included angles between the polarization directions of the electro-optic Q-switch laser pulses and the polarization transmitting direction of the polarization beam splitter can be changed, the beam splitting ratio of the first laser pulses to the second laser pulses formed by splitting the electro-optic Q-switch laser pulses is adjusted, and the beam splitting ratio of the single electro-optic Q-switch laser pulses is controlled.

Description

technical field [0001] The invention relates to laser technology, in particular to an electro-optic Q-switched pulse laser with controllable single pulse splitting ratio. Background technique [0002] Q-switched laser technology is an important technology that compresses all the energy of the laser into a very narrow pulse and emits it, thereby increasing the peak power of the laser by several orders of magnitude. Q-switched switching devices with short switching times (about 10 -9 s), high efficiency, precise control of Q-switching time, narrow output pulse width (10-20ns), high peak power (above tens of MW), etc., is a widely used Q-switching technology at present. [0003] An electro-optic Q-switched laser is usually composed of a total reflection mirror, a λ / 4 wave plate, an electro-optic Q-switched crystal, a polarizer, a laser gain medium, and an output mirror. In the state of energy storage, when the voltage is applied to the Q-switching crystal, the laser outputs e...

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Problems solved by technology

[0004] Electro-optic Q-switched lasers usually only output a laser beam containing several electro-optic Q-switched laser pulses. After using a beam splitter at the output end of the laser, two laser beams can be formed, but the beam splitting ratio of the two laser beams is fixed. Adjusting the beam splitter can adjust the beam splitting ratio of the two laser beams, but this adjustment is to adjust multiple electro-optic Q-switched laser pulses in the laser beam together, not for the specified electro-optic Q-switched laser pulse, let alone Controlling the splitting ratio of a single electro-optic Q-switched laser pulse

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