Solid laser

Abstract

The invention discloses a solid laser, comprising a resonant cavity which is provided with at least one end surface pumping device and at least one side pumping device at the same time. The oscillation laser in the resonant cavity is generated by lasing amplification of the gain medium of the end surface pumping device and the gain medium of the side pumping device at the same time; the gain medium of the end surface pumping device and the gain medium of the side pumping device are on the same optical axis of the resonant cavity. By the mutual relevance between the lasing amplification of the end surface pumping laser medium in the resonant cavity and the lasing amplification of the side pumping laser medium in the resonant cavity, the invention has the respective advantages of the end surface pumping type and the side pumping type, has high conversion efficiency, high quality of output beam and linear polarization, greatly improves the output power, correspondingly reduces the high thermal stress which is born by the end surface pumping laser medium and avoids the occurrence of thermal cracking. If the invention is combined with nonlinear optical and Q-adjusting elements, the invention can be widely applied to the nonlinear frequency conversion lasers and pulse lasers with great power.

Description

Technical field [0001] The invention relates to a solid-state laser combining end-pumping and side-pumping technologies, and belongs to the field of laser technology and devices. Background technique [0002] The existing Laser-Diode pumped solid-state laser (DPSSL) generally has two pumping methods. One is end-pumping, also known as longitudinal pumping. The thermal effect in the laser medium is more serious, and the thermal cracking of the laser medium greatly limits the maximum output power of the end-pumped laser. Due to its own space limitations, it is generally only used In the range of low and medium power levels; the other is side pumping, which is also called lateral pumping. Its active area is located at the edge of the laser crystal. Multi-transverse mode oscillation is prone to appear in the cavity, the output beam quality is poor, and the fundamental transverse mode efficiency is not high. It is a side-pumped module product with Nd:YAG as the laser medium. The output...

AI Technical Summary

Problems solved by technology

One is end-pumping, also known as longitudinal pumping. The thermal effect in the laser medium is relatively serious, and the problem of thermal cracking of the laser medium greatly limits the maximum output power of the end-pumping laser. Due to its own space limitation, it is generally only used In the range of low and medium power levels; the other is side pumping, also known as transverse pumping, whose active area is located at the edge of the laser crystal, and multi-transverse mode oscillations are prone to occur in the cavity, the output beam quality is poor, and the efficiency of the fundamental transverse mode is not high, especially It is a side-pumped module product with Nd:YAG as the laser medium, and the output laser is nonlinearly polarized light, which is not conducive to efficient nonlinear frequency conversion

The current DPSSL generally uses end-face or side-pumped methods alone, which cannot overcome the above-mentioned respective shortcomings.

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