Temperature-control-free high-beam-quality electro-optic Q-switched pulse laser

Abstract

The invention discloses a temperature-control-free high-beam-quality electro-optic Q-switched pulse laser, and the laser is characterized in that the laser comprises a U-shaped resonant cavity composed of a total reflection mirror, a rectangular prism and an output mirror; an LD pumping module, an Nd: YAG slab crystal and a Q-switched mechanism, wherein the LD pumping module, the Nd: YAG slab crystal and the Q-switched mechanism are arranged in the U-shaped resonant cavity. The LD pumping module and the Nd: YAG slab crystal are arranged between the rectangular prism and the output mirror, and the LD pumping module comprises a plurality of LD bars with different central wavelengths and is used for emitting laser with different wavelengths; the end face of the Nd: YAG lath crystal is cut according to a Brewster angle, laser in the LD pumping module and the U-shaped resonant cavity is totally reflected, and linear polarization is kept; and the Q-switching mechanism is arranged between the right-angle prism and the total reflective mirror, and the Q-switching mechanism is used for performing Q-switching on the laser in the U-shaped resonant cavity. According to the invention, the laser is free of temperature control, the whole machine is miniaturized and light, and the application range is widened.

Description

technical field [0001] The invention relates to a laser, in particular to an electro-optic Q-switched pulse laser with temperature-free control and high beam quality. Background technique [0002] In the photoelectric countermeasure system, the laser rangefinder and the laser photometer are necessary photoelectric equipment, and the laser is one of the core components in the rangefinder or photometer. This type of laser usually uses a solid-state pulsed laser, and the typical technical route is to use LD to pump Nd:YAG crystals, combined with active or passive Q-switching, the output pulse width is in the range of 5ns to 20ns, and the single pulse energy is in the range of tens to hundreds of milliseconds. Jocal level pulsed laser. [0003] At present, the laser in the mainstream laser photometer is temperature-controlled and designed with a temperature control system, which is usually composed of TEC (semiconductor cooling chip), heat sink and fan. The laser with temperat...

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Problems solved by technology

[0004] Therefore, the laser TEC with temperature control leads to increased power consumption, and the heat sink increases the size of the whole machine, which often cannot meet the requirements of miniaturization, light weight and low power consumption at the same time. In some cases, it cannot meet the requirements of miniaturized photoelectric pendants The overall requirements of the cabin, there are restrictions on the use

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