Broadband laser system chromatic aberration dynamic compensation device

Abstract

The invention discloses a broadband laser system chromatic aberration dynamic compensation device, which comprises a first half-wave plate, a polarizing spectroscope, a first quarter-wave plate, a convex lens, a concave lens group, a concave mirror, a first two-dimensional translation stage, a second two-dimensional translation stage, a second quarter-wave plate, a plane mirror, and a second half-wave plate. The broadband laser system chromatic aberration dynamic compensation device uses image transfer structural design and can significantly improve output beam quality by spatial filtering andsmall hole filtering. The relative distance among the concave lens group, the concave mirror and the convex lens can be controlled by moving the two-dimensional translation stage. The broadband lasersystem chromatic aberration dynamic compensation device can gradually change a beam diameter emitted to the concave lens group, thereby continuously controlling a chromatic aberration compensation amount and being advantageous for precisely optimizing a chromatic aberration compensation effect. The device of the invention can be applied as a chromatic aberration compensation unit to an ultra-short pulse laser system, provides full system chromatic aberration compensation, can also be used in a common optical system, and has a large chromatic aberration compensation range.

Description

technical field [0001] The invention relates to a chromatic aberration compensation device for a broadband laser system, in particular to a dynamic chromatic aberration compensation device for a high-power femtosecond ultrashort pulse laser system. Background technique [0002] In order to develop fusion energy technology, scientists have developed high-power laser devices for research on technical solutions such as central ignition and fast ignition. In a high-power ultrashort pulse laser device, in order to avoid damage to optical components caused by excessive power density, it is necessary to expand and amplify the laser pulse step by step. Usually, a high-power laser system adopts a large-aperture spatial filter structure. On the one hand, the beam aperture can be expanded step by step, and on the other hand, high-frequency spectral noise can be filtered out to effectively realize image transmission and improve beam quality. The spatial filter of traditional narrow-ban...

AI Technical Summary

Problems solved by technology

The chromatic aberration compensation unit based on the diffraction element can provide a large amount of chromatic aberration compensation, but the beam quality is significantly reduced; while the use of the transmission element to compensate chromatic aberration, although the beam quality is better, is limited by materials and processing technology, and it is difficult to provide greater chromatic aberration compensation. quantity

Images