Compact high-gain ultrafast laser amplifier

Abstract

The invention relates to the technical field of laser amplifiers, and discloses a compact high-gain ultrafast laser amplifier which comprises a seed laser source, a polarization splitting prism, a dual-wavelength double-end pumping structure and a reflection structure. A first pumping laser source and a second pumping laser source in the dual-wavelength double-end pumping structure are oppositely arranged; after being reflected by the polarization splitting prism and the first tricolor mirror, the seed laser enters the first end of the main amplification module, is emitted from the second end of the main amplification module, and is reflected out of a pump light path through the second tricolor mirror; and the light is reflected back to the second three-color mirror by the reflection structure, sequentially passes through the main amplification module and the first three-color mirror, enters the polarization splitting prism, and exits in a direction perpendicular to the initial incidence direction. A double-end pumping structure is adopted, so that amplification loss caused by insufficient density of reversal particles at the rear end of the Yb: YAG crystal rod during single-end pumping is avoided, and the gain of the laser amplifier is improved; the seed laser is amplified again through the reflection structure, light path folding is achieved, and the overall structure is more compact.

Description

technical field [0001] The patent of the present invention relates to the technical field of devices that utilize radiation (laser) stimulated emission to amplify or generate light using an optical amplification process in a new generation of information technology, in particular, to a compact high-gain ultrafast laser amplifier. Background technique [0002] High-power ultrafast lasers play many roles in various fields such as industry, scientific research, and national defense. The current kilowatt-class high-power ultrafast lasers are mainly based on Yb-doped fiber, slab and thin-film lasers. The ultrafast laser based on the Yb:YAG end-pumped rod structure has great application prospects in the industrial field due to its simple structure and convenient maintenance. [0003] Most of the existing high-power amplifier modules based on Yb:YAG end-pumped rod-shaped industrial lasers adopt a single-end pump structure. Because of the high-power high-brightness fiber-coupled d...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a compact high-gain ultrafast laser amplifier, which aims to solve the problem in the prior art that the amplification loss in the second half of the single-ended pumping structure affects the amplification gain

Images