Laser module of rotary semiconductor side pump for optical pumping of bar-shaped crystal

Abstract

The invention provides a laser module of a rotary semiconductor side pump for optical pumping of a bar-shaped crystal. The laser module includes a crystal bar and a pump source unit including nine semiconductor laser one-dimensional linear pump sources. Each semiconductor laser one-dimensional linear pump source includes a plurality of bars spaced from each other with a distance. The nine semiconductor laser one-dimensional linear pump sources are divided into three classes according to the distribution type difference of the bars, namely, a first class, a second class and a third class. The nine semiconductor laser one-dimensional linear pump sources surround the crystal bar in a sequence of first class-second class-third class-first class-second class-third class-first class-second class-third class for pumping. The invention also provides a laser. According to the invention, the heat effect of the laser crystal bar in a process of high dimension pumping of the full solid state laser module is reduced, a pumping dark zone above the axis of the crystal bar is eliminated and the utilization rate of the semiconductor pump source and the laser crystal bar is improved.

Description

technical field [0001] The present disclosure relates to the technical field of high-power all-solid-state lasers, and in particular to a laser module and a laser for pumping rod-shaped crystals by rotating semiconductor side pumps. Background technique [0002] All-solid-state lasers have the advantages of high efficiency, long life, good beam quality, moderate volume, and flexible transmission, and are currently one of the more mature laser technologies. High-power all-solid-state lasers are usually realized by several semiconductor laser side-pumped all-solid-state laser modules through the cascading mode of resonance and amplification. Therefore, the laser module is the core device that constitutes a high-power all-solid-state laser, and its performance directly determines the laser. The quality of the whole machine. [0003] At present, laser modules generally use three-dimensional, five-dimensional or seven-dimensional pumping sources to surround the crystal rod for p...

AI Technical Summary

Problems solved by technology

In fact, the higher the dimension of the pump source, the better. The thermal effect of the crystal bar will become very serious when pumping in seven dimensions. Generally, a 40W semiconductor bar can only work below 30W, and the pump source cannot be fully utilized. , the output power of the laser module is limited

In addition, when the semiconductor laser one-dimensional linear array is packaged, there will be a gap of about 1-2mm between the bar and the bar, and there will be more than 10% of the dark area within the length of the pumping area of ​​the crystal rod. A periodic structure is formed on the crystal rod, which not only reduces the number of bars in the axial direction but also increases the pumping inhomogeneity of the crystal rod in the axial direction, limiting the output power of the laser module below kilowatts

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