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Side-pumping Yb:YAG ultrashort pulse laser amplifier

An ultra-short pulse laser, side-pumping technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of side-pumping scheme application of Nd:YAG four-level system, and achieve good crystal heat dissipation Efficiency, alleviation of beam distortion, uniform distribution effect

Pending Publication Date: 2021-12-17
SHANDONG UNIV
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Problems solved by technology

[0007] Because Nd:YAG and Yb:YAG are two different energy level structure mechanisms, the side pumping scheme of Nd:YAG four-level system cannot be simply applied to Yb:YAG crystals

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  • Side-pumping Yb:YAG ultrashort pulse laser amplifier

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Embodiment

[0042] A Yb:YAG ultrashort pulse laser amplifier based on side-pumped structure, such as figure 1 As shown, it includes a seed light source 1, an optical isolator 2, a first focusing lens 3, a first Yb:YAG side pump module, a Faraday rotator 8, a second focusing lens 9, and a third focusing lens 10 arranged in sequence along the optical path. , the second Yb:YAG side pump module;

[0043] The signal light output by the seed light source 1 first passes through the optical isolator 2, and then passes through the first focusing lens 3 for beam adjustment. The adjusted signal light enters the first Yb:YAG side pump module for amplification, and the amplified signal light passes through the Faraday The optical rotator 8 adjusts the polarization direction so that it rotates 90 degrees clockwise; then the signal light passes through the 4f imaging system composed of the second focusing lens 9 and the third focusing lens 10 for beam adjustment, and the adjusted signal light enters the...

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Abstract

The invention relates to a Yb:YAG ultrashort pulse laser amplifier based on a side-pumping structure. The Yb:YAG ultrashort pulse laser amplifier comprises a seed light source, a light isolator, a first focusing lens, a first Yb:YAG side pumping module, a Faraday rotator, a second focusing lens, a third focusing lens and a second Yb:YAG side pumping module which are sequentially arranged along a light path. According to the invention, after the defects that a Yb:YAG quasi-three-level system is high in pumping threshold value and low in side pumping intensity are compensated through a comprehensive technology, a side pumping structure can easily achieve the pumping power of kilowatt magnitude or above through a flash lamp, a semiconductor laser bar and other low-brightness light sources, the defect of insufficient brightness is overcome through the high power of the side pumping structure, and a Yb:YAG crystal with a larger size can be used as a gain medium for side pumping, so that a sufficiently large pumping area is provided for the pumping light, and sufficiently high gain is provided for the signal light.

Description

technical field [0001] The invention relates to a Yb:YAG ultrashort pulse laser amplifier based on a side pump structure, belonging to the technical field of laser amplifiers. Background technique [0002] Ultrashort pulse laser usually refers to the pulse width in picoseconds (10 -12 s) or femtoseconds (10 -15 s) level pulsed laser, which has the characteristics of extremely narrow pulse, extremely wide spectrum, and extremely high peak power. Thanks to the "cold processing" characteristics of ultrashort pulse lasers, ultrashort pulse lasers have been widely and deeply used in scientific research, industrial production, biomedicine, semiconductor material processing and other fields, and the market is demanding higher power, more The demand for high energy ultrashort pulse laser is increasing day by day. [0003] Mode-locked lasers are an effective technical means to obtain ultrashort pulse lasers. However, the power and energy of pulsed lasers directly obtained from mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/16H01S3/0941
CPCH01S3/1643H01S3/0941
Inventor 刘兆军王上赵智刚丛振华张行愚
Owner SHANDONG UNIV
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