Double-disc-serial-connecting pump light multi-pass transmission system and disc solid laser

Abstract

The invention discloses a double-disc-serial-connecting pump light multi-pass transmission system which comprises a first off-axis parabolic mirror, a first right-angle reflecting mirror group, a first disc laser crystal, a spherical reflecting mirror, a second off-axis parabolic mirror, a second right-angle reflecting mirror group and a second disc laser crystal. The first right-angle reflecting mirror group is placed on a reflecting light path of the first off-axis parabolic mirror. The first disc laser crystal is placed at the focus of the first off-axis parabolic mirror. The second off-axis parabolic mirror and the first off-axis parabolic mirror are arranged symmetrically about a plane alpha which passes through a spherical mirror sphere center. The second right-angle reflecting mirror group is placed on a reflecting light path of the second off-axis parabolic mirror. The second disc laser crystal and the first disc laser crystal are arranged symmetrically about a plane alpha which passes through a spherical mirror sphere center. The invention further discloses a high-power disc solid laser, and stable high-energy laser output is achieved.

Description

technical field [0001] The invention belongs to the field of laser technology, and more specifically relates to a pump light multi-path transmission system with two discs connected in series and a disc laser. Background technique [0002] Disk solid-state laser is a high-end high-power solid-state laser. The essential difference between it and the traditional solid-state laser lies in the shape of the laser working material. The disc laser changes the traditional rod-shaped crystal into a disc-shaped crystal. The thickness of the crystal is 0.2mm ~ 0.4mm. The pump light is incident from the front of the crystal, and the cooling is realized on the back of the crystal. Since the crystal is very thin and the diameter and thickness are relatively large, the cooling effect of the crystal is good, which is conducive to obtaining high conversion efficiency and high efficiency. Laser output with average power and high beam quality. [0003] One of the greatest advantages of disk l...

AI Technical Summary

Problems solved by technology

However, the main defects of this pump light multi-pass transmission system are: the distribution of light spots on the surface of the parabolic mirror is relatively scattered, the utilization rate of the effective area of ​​the parabolic mirror is low, the heating of the parabolic mirror is uneven, and the surface distortion is serious during high-power operation. As a result, the thermal distortion and thermal lens effect of the disk laser crystal caused by the pump light converged to the disk through the parabolic mirror are quite serious, which affects the conversion rate of the system and limits the further improvement of the output laser quality

There are still problems such as the limited number of pumping times in the above-mentioned disclosed patents, and the low efficiency of the disc crystal absorbing pump light.

Images