Fully solid self mode-locked femto second laser

Abstract

One fully solid self mode-locked femto-second Nd:LMA laser can generate laser of 1054 nm wavelength. The present invention uses SF57 as Kerr medium to strengthn self-focusing effect, reduce the threshold power of initiating self mode locking and solve the problem that Nd:LMA gain medium can not self lock mode directly owing to its small nonlinear coefficient. The laser has laser pulse width reaching 610 fs and is one full solid femto second-level with small volume and stable output. The laser has application value in large scale and very large scale laser system, field strength physics, laser nuclear fusion, X-ray laser, very fast process research and other fields.

Description

technical field [0001] The invention belongs to the improvement of the solid laser structure. Background technique [0002] The self-mode-locking technology of lasers has brought profound changes to the generation of ultrashort pulses of solid-state lasers. At present, the shortest optical pulse of 6.5fs is directly generated from the Ti:Sapphire self-mode-locked laser, and the optical pulse less than 5fs is obtained by using the extracavity compression technology. The use of chirped pulse amplification technology enables solid-state laser systems to obtain extremely high peak power density and large output energy, so the ultrafast and intense laser physics of solid-state lasers has become a research hotspot. Since all-solid-state lasers are pumped by laser diodes (LDs), they have the advantages of high efficiency, small size, long life, and good stability, so all-solid-state self-mode-locked lasers have become the development direction of laser research. [0003] Realizin...

AI Technical Summary

Problems solved by technology

However, Cr:LiSAF media cannot output laser pulses at 1054nm. Gain media such as Nd:YAG, Nd:YLF, and Ti:Sapphire can output laser pulses at about 1054nm, but Nd:YAG and Nd:YLF cannot produce laser pulses due to narrow spectral half widths. Femtosecond pulses, in which Ti:Sapphire has low gain at 1054nm wavelength and cannot be directly pumped by laser diodes; Nd:LMA(La 1-X MgNd x Al 11 o 19 ) Although the central wavelength of the laser medium is at 1054nm, due to its small nonlinear coefficient, it cannot directly perform Kerr lens mode-locking

Therefore, no all-solid-state self-mode-locked femtosecond laser capable of generating 1054nm laser pulses has been seen so far.

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