Slab laser beam expanding alignment system capable of adjusting in electric closed loop mode

Abstract

The invention provides a slab laser beam expanding alignment system capable of adjusting in an electric closed loop mode. The slab laser beam expanding alignment system capable of adjusting in the electric closed loop mode comprises a slab laser device, a first cylindrical lens, a second cylindrical lens a first spherical lens, a second spherical lends, a computer, a stepping motor and a distant field detection system, wherein the first cylindrical lens and the second cylindrical lens are arranged in orthogonal mode, the first cylindrical lens and the cylindrical lens are respectively connected with the stepping motor, the computer is connected with the stepping motor and the distant field detection system, a laser beam transmitted by the slab laser device sequentially passes through the first cylindrical lens, the second cylindrical lens, the first spherical lens and the second spherical lends, and then is shot into the distant field detection system, and the computer receives a feedback signal of the distant field detection system, controls running of the stepping motor according to the feedback signal, and thereby controls positions of the first cylindrical lens and the second cylindrical lends. The slab laser beam expanding alignment system capable of adjusting in the electric closed loop mode can guarantee that slab laser has good alignment effects under different work states, and is high in adjustment accuracy, good in alignment effect, and safe and simple to operate.

Description

technical field [0001] The invention belongs to the technical field of shaping, coupling and transformation of laser beams, and in particular relates to an electric closed-loop adjusted laser collimation and beam expansion optical system, which is used for the size scaling and real-time automatic adjustment of the divergence angle of the output beam of a solid slab laser. Background technique [0002] In solid slab lasers, the asymmetric geometric structure of the gain medium and the zigzag optical path can effectively compensate thermal optical effects such as thermal lens and thermally induced birefringence, making it easier to obtain a better beam under high-power laser output conditions quality. However, since the dimension in the width direction of the slab gain medium is much larger than the dimension in the thickness direction, the temperature gradients in the width direction and thickness direction inside the gain medium are quite different under the condition of hig...

AI Technical Summary

Problems solved by technology

The system structure of this scheme is simple, but it cannot take into account the divergence angle collimation in both the width and thickness directions of the slab laser at the same time

2) Cylindrical lens beam expander collimation system: composed of two cylindrical lenses and two ball lenses, it pre-compensates the divergence angle specific to the width and thickness direction of the slab laser, but the divergence angle of the slab laser will vary with the loading There are significant changes due to the difference in power and running time. This scheme has a large residual error in alignment and cannot be adjusted in real time under strong light conditions. The safety of manual adjustment operators cannot be guaranteed. This is the deficiency of the existing technology.

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