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High power semiconductor pump laser and amplifier

A pumping laser, high-power technology, used in lasers, amplifiers, and laser fields, can solve problems affecting laser performance, low-power application, etc., to achieve good beam quality, stable power output, and reduce thermal effects.

Inactive Publication Date: 2009-08-05
SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD
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Problems solved by technology

Especially in the traditional end-pumped rod-shaped gain crystal, serious thermal lens will be formed, and the thermal effect will also cause the end face of the crystal to bulge. This situation will directly affect the mode distribution in the resonator of the microchip solid-state laser. Thus affecting the overall laser performance, so this structure is only suitable for low and medium power

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Embodiment Construction

[0019] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0020] The present invention designs a new type of pumping system, which adopts high-power LD bars to collimate through cylindrical lenses, and then pumps them into the slab-type gain medium from the end face, and two optical glues at both ends of the gain medium Blank crystals are used to limit surface protrusions caused by thermal effects, such as optically glued YVO4 crystals at both ends of Nd3+:YVO4 crystals, and side water cooling can be used to dissipate heat. It should be noted that the end face of the slab-type gain medium in the system is the end face in the long direction, which is different from the traditional slab pumping method. This design is to allow the LD bar to be directly coupled into the gain medium without focusing. , and the pump absorption is more uniform, and at the same time, possible thermal damage is avoided. Then a pris...

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Abstract

The invention relates to the laser field, in particular to the field of the laser and the amplifier. In the technical proposal, after the semiconductor laser array is aligned by a cylindrical lens, and the lath-shaped laser gain medium is directly pumped without focusing; the front end surface of the lath-shaped gain medium and a back-cavity mirror form a resonant cavity; and a prism or a prism pair in the cavity is used for compressing the beams in the direction of the long axis, thereby obtaining the laser output close to round spots. The invention can manufacture the outputs of various required lasers with high-power fundamental wave, frequency-doubling light, Q switching, continuous light and the like. As the high-power pump system reduces the influence of thermal effects, the invention can realize more stable power output and good beam quality. Therefore, the invention provides a high-power semiconductor pump laser or amplifier.

Description

technical field [0001] The invention relates to the field of lasers, in particular to the fields of lasers and amplifiers. Background technique [0002] In the case of high-power pumping of semiconductor-pumped solid-state lasers, the laser gain medium has an abnormal thermal effect, such as in Nd 3+ :YVO 4 In the crystal, it seriously affects the power stability, beam quality and laser efficiency of the laser. Especially in the traditional end-pumped rod-shaped gain crystal, serious thermal lens will be formed, and the thermal effect will also cause the end face of the crystal to bulge. This situation will directly affect the mode distribution in the resonator of the microchip solid-state laser. Thus affecting the overall laser performance, so this structure is only suitable for low and medium power. Therefore, in order to reduce the influence of thermal effects in high-power pumping systems, various pumping methods such as side pumping or multi-LD array side pumping are...

Claims

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Application Information

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IPC IPC(8): H01S3/16H01S3/0941G02B27/09
Inventor 吴砺凌吉武薛有为王艳丽马英俊
Owner SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD
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