Laser device

Abstract

The invention relates to a laser device, which comprises a laser gain structure, a pumping source, a first end mirror, a second end mirror and a temperature control structure, and is characterized in that the pumping source, the first end mirror, the second end mirror and the temperature control structure are respectively connected with the laser gain structure, wherein the first end mirror, the laser gain structure and the second end mirror are arranged in sequence and form a laser resonant cavity; the temperature control structure is used for performing temperature control on the laser gain structure; the pumping source is used for providing pumping light for the laser gain structure; and the laser gain structure is made of at least one material with a tangential thermal expansion coefficient which can be zero or extremely small. The device is compact in structure and optimized in design, laser output is directly generated by adopting an innovative laser gain structure, wavefront distortion is reduced without a complex wavefront correction system, and therefore a guarantee is provided for achieving high-power and high-beam-quality laser output; and the device is low in overall cost and high in reliability.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a laser device. Background technique [0002] Laser technology provides support for many fields such as industrial manufacturing. Among them, all-solid-state lasers have the advantages of high efficiency, compact structure, and high reliability, and are an important development direction of laser technology; especially, high-power and high-beam quality laser output. An important development direction of laser technology. [0003] However, as the power of the solid-state laser increases, the beam quality decreases nonlinearly. This defect is mainly caused by the serious thermal effect in the solid-state laser. Among them, the waste heat generated by the laser crystal absorbing the pump light causes an inevitable temperature gradient. The thermal lens effect caused by the temperature gradient and the wavefront distortion caused by the deformation of the end face directly lead to th...

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Problems solved by technology

[0003] However, as the power of the solid-state laser increases, the beam quality decreases nonlinearly. This defect is mainly caused by the serious thermal effect in the solid-state laser. Among them, the waste heat generated by the laser crystal absorbing the pump light causes an inevitable temperature gradient. The thermal lens effect caused by the temperature gradient and the wavefront distortion caused by the deformation of the end face directly lead to the decrease of the beam quality and output power, which not only affects the stability of the resonator, but also causes the cracking of the laser crystal in extreme cases

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