Ytterbium ion doped abgs crystal and self frequency doubling ultrashort pulse laser

Abstract

The invention relates to ytterbium ion-doped ABGS crystal and a self-frequency-multiplied ultrashort pulse laser, which includes a semiconductor laser pump source arranged along the optical path, a focusing system, and a first cavity mirror M 1 , self-frequency doubling laser crystal, second cavity mirror M 2 , GTI mirror, third cavity mirror M 3 , the fourth cavity mirror M 4 , saturable absorber; the self-frequency doubling laser crystal is doped with ytterbium ions A 3 B Ga 3 Si 2 o 14 Crystal, A=Ca or Sr, B=Nb or Ta. The crystal has laser emission and nonlinear optical effects at the same time, and uses a self-frequency doubling crystal to achieve ultrashort pulse self-frequency doubling green light output through mode-locking technology. The invention has low cost, and adopts one self-frequency doubling laser crystal to replace two crystals, a laser crystal and a nonlinear crystal, greatly reduces the production cost, simplifies the processing and assembly links, and improves the production efficiency.

Description

technical field [0001] The invention relates to a passive mode-locked self-frequency doubling ultrashort pulse laser, especially based on ytterbium ion doping A 3 B Ga 3 Si 2 o 14 A self-frequency doubling laser of (A=Ca, Sr; B=Nb, Ta) crystal belongs to the field of laser technology, and relates to laser and nonlinear crystal devices. Background technique [0002] Visible band (380nm-760nm) pulsed laser, especially ultrashort pulse laser (picosecond, femtosecond level) is an important technical means to study ultrafast phenomena in the objective world, and is widely used in micro-nano processing, optical detection, military defense and other fields. For example, for unknown personnel entering military restricted areas during wartime, the use of green (~532nm) pulsed lasers can temporarily blind the intruders and stop their actions. The pulsed laser light source of this wavelength can achieve effective but harmless area defense. At present, the more common way to obtain...

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Problems solved by technology

[0008] At present, no ideal crystal material that can satisfy the above conditions at the same time has been found in the prior art. Due to the limitation of crystal materials, self-frequency doubling crystals have not made breakthroughs in the field of all-solid-state pulsed lasers in the visible band.

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