Pressure automatic balance laser head device

Abstract

The invention discloses a pressure automatic balance laser head device and belongs to the field of laser amplifiers. The pressure automatic balance laser head device comprises a cooling liquid layer, a gain medium, a liquid inlet channel, a balance air pressure layer, an air sealing window, an air storage tank and a drying box, wherein the liquid inlet channel is a three-way liquid inlet channel; the air sealing window, the balance air pressure layer, the gain medium and the cooling liquid layer are plate-strip shapes with almost equal areas and are sequentially arrayed in parallel; the two ends of the three-way liquid inlet channel are connected with the cooling liquid layer and the balance air pressure layer respectively; the air storage tank and the drying box are connected between the three-way liquid inlet channel and the balance air pressure layer in series; air pressure of the balance air pressure layer is equal to hydraulic pressure of the cooling liquid layer; pressure on the two sides of the gain medium can be balanced by the device so that the deformation of the gain medium, caused by single-end cooling hydraulic pressure, is eliminated; wave-front distortion of laser after reflection, caused by the medium deformation, is eliminated; the pressure automatic balance laser head device has the advantages of simple structure and low construction cost, is easy to realize and the like.

Description

technical field [0001] The invention relates to the field of laser amplifiers, in particular to a pressure automatic balancing laser head device. Background technique [0002] The reflective active mirror is a typical large-aperture laser amplifier amplification structure. This structure has many advantages such as multiplying the laser amplification times, facilitating the cooling of the gain medium, and facilitating large-area LD array pumping. However, the cooling liquid almost absorbs the laser. Even if the cooling liquid does not absorb, the bubbles and turbulence generated by its flow also make it difficult for the laser to pass through the cooling liquid layer. Therefore, the reflective active mirror structure provides single-sided cooling for the gain medium. . However, since the longitudinal thickness of the gain medium in the reflection-activated mirror structure is generally much smaller than the lateral dimension, the gain medium will be deformed due to the pres...

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Problems solved by technology

In order to solve the problem of hydraulic pressure difference between the front and back of the medium, some researchers use double-ended cooling, but the double-ended cooling needs to select a special coolant that does not absorb the laser wavelength, and special instruments are required to minimize the air bubbles caused by the circulating flow of the coolant , turbulence, etc., but cannot be completely eliminated, and the structure of the laser head is complicated, the cost is high, and it is not easy to realize

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