Reflection gain type high-power laser device

Abstract

The invention discloses a reflection gain type high-power laser device and relates to the fields such as industrial cutting, military science and the like with higher requirements on the power of the laser device. The laser device comprises a quartz tube (1), an internal tube wall gain coating (2), a totally reflecting mirror (31), a partially reflecting mirror (32) and a pumping source (4); and the internal tube wall gain coating (2) is made from rare earth ions. The internal tube wall gain coating (2) can be used for totally reflecting generated laser signals. The totally reflecting mirror (31) can be used for totally reflecting the generated laser signals. The reflectivity of the partially reflecting mirror (32) to the generated laser signals is 4-96%. The pumping source (4) can be used for directly irradiating the quartz tube (1) from the lateral side. The shape of the cross section of the quartz tube (1) is characterized in that both the internal wall and the external wall are circular or rectangular, or the internal wall is star-shaped and the external wall is circular. The reflection gain type high-power laser device disclosed by the invention is beneficial to solving of the problem of concentration quenching resulting from overhigh doped concentration in the high-power rare earth ion doped laser device.

Description

technical field [0001] The invention relates to a laser, which is especially used in fields such as industrial cutting and military affairs which have higher requirements on the power of the laser. Background technique [0002] The production and development of lasers have made outstanding contributions to the improvement of national life, and their application fields are far wider than originally imagined. Nowadays, due to the increasing importance of lasers, people pay more and more attention to them, so the funds, manpower and material resources invested in the research and development of lasers are increasing day by day. The special structure of the laser can make the output laser have good directionality and high energy density. At present, most of the gain methods of lasers are that the laser propagates in the growth medium, and the laser gain is doubled by exciting the excited state particles in the gain medium each time. This method can produce a good output effect...

AI Technical Summary

Problems solved by technology

When the gas density increases, the intensity of backscattering will increase, which will affect the gain of the laser; and the practice of increasing the doping concentration of the gain medium in the solid is difficult to ensure the uniformity of the concentration, such as doping rare earth ions In fiber lasers, if the concentration of rare earth ions is too high, concentration quenching will occur, and a large number of ions will gather into clusters, making it difficult to achieve high power output of the laser.

The upper limit of the laser power brought about by this is difficult to increase greatly

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