Bicavity series full solidifying fly second laser

Abstract

The invention relates to a totally solidified femtosecond laser with a double cavities series structure, which is made up of four semiconductor laser pumping sources, four plating sphere mirrors, two blocks of laser crystals used as gain media, two prism pairs, a fully reflector (or semiconductor saturated absorbing mirror) and a output coupling mirror. The centre wavelength outputted by the laser is 830nm, the tuning range is 100nm, and the outputted pulse width is about 100fs. The centre wavelength outputted by semiconductor pumping light source is 673nm. The laser is compact, the cost is low and the performance is stable.

Description

Technical field [0001] The invention belongs to the technical field of femtosecond lasers, and specifically relates to a fully solidified femtosecond laser with a two-cavity series structure. Background technique [0002] In recent years, femtosecond lasers have been widely used in fields such as physics, biology, chemical control reactions, and optical communications. In particular, due to the fast and high-resolution characteristics of femtosecond lasers, it has unique advantages and irreplaceable effects in early diagnosis of lesions, medical imaging and biological detection, surgical treatment and the manufacture of ultra-small satellites. In addition, high-power femtosecond lasers also have good development prospects in medicine, ultra-fine micro-processing, and high-density information storage and recording. The high-power femtosecond laser interacts with matter to generate a sufficient number of neutrons to achieve rapid ignition of laser-controlled nuclear fusion. So as t...

AI Technical Summary

Problems solved by technology

It should be said that the current titanium-sapphire femtosecond laser has done a good job in terms of convenience, stability and reliability, but its price of 100,000-300,000 US dollars makes many potential users feel helpless

[0007] In addition, it is worth mentioning that Cr 3+ : The thermal conductivity of LiSAF is poor, as the pump power increases, the crystal temperature increases, and the Cr 3+ The lifetime of the upper energy level decreases, which will lead to Cr 3+ : The output power of the LiSAF laser drops

Due to Cr 3+ : The poor thermal conductivity of LiSAF crystal itself leads to Cr 3+ : It is difficult to increase the output power of LiSAF laser, which has always been a difficulty

Although most of the measures currently used to cool the crystal with water cooling can alleviate this difficulty, the cooling effect is limited, and the introduction of the cooling system causes the entire laser system to be complicated, which does not meet the requirements of miniaturization and full solidification.

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