Bicavity series full solidifying fly second laser

A femtosecond laser, all-curing technology, applied in the field of femtosecond laser, can solve problems such as difficulty, poor thermal conductivity, and reduced upper energy level life, and achieve the effects of low price, convenient use and broad market prospects.

Inactive Publication Date: 2004-12-22
FUDAN UNIV
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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

Method used

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  • Bicavity series full solidifying fly second laser
  • Bicavity series full solidifying fly second laser

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Embodiment Construction

[0017] according to figure 1 As shown, the fully solidified femtosecond laser consists of a plane mirror PM, a spherical mirror M1, and a laser crystal Cr 3+ :LiSAF, spherical mirror M2, spherical mirror M3, laser crystal Cr 3+ : LiSAF, spherical mirror M4, output coupling mirror OC are arranged in sequence. First, carefully adjust the semiconductor diode and the collimating lens L1, L2 so that the laser output from the semiconductor diode is coupled into the laser crystal. Then carefully adjust the folding angles α1, α2 and the end mirror PM, MO under the conditions of astigmatism compensation, so that the light is incident on the end mirror perpendicularly, and then fine-tune M1, M2 and the laser crystal LiSAF1 so that CW laser can be output on MO In this way, the adjustment of the laser cavity 1 is completed. As mentioned above, the adjustment element makes the laser cavity 2 also output laser light. Then the end mirror MO is removed, and the two laser cavities are connected i...

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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...

Claims

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Application Information

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IPC IPC(8): H01S3/00H01S3/05H01S3/0941
Inventor 钱列加王韬朱鹤元谢国强
Owner FUDAN UNIV
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