A pump coupling device and method for slab-shaped laser crystal
A pump coupling device, laser crystal technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of affecting the quality of the output oscillation beam, limited crystal filling rate, complex laser optical path adjustment, etc., to achieve high Laser output with high energy beam quality, high degree of mode matching, and good output beam quality
Active Publication Date: 2020-04-10
BEIJING RES INST OF TELEMETRY +1
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Problems solved by technology
[0004] The oscillating light and the pumping light in the slab crystal of the different optical path fail to achieve complete mode matching, the crystal filling rate is limited, it is difficult to obtain high power density, and the output beam quality is poor
However, in the existing oscillating light and pumping light in the same optical path, the external dichroic mirror of the crystal is mainly used to realize the adjustment of the laser optical path, which reduces the stability of the laser and increases the difficulty of integrating the pump module. Under high power operating conditions, the thermal effect of the lens itself will affect the quality of the output oscillation beam
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[0060] Such as figure 1 Shown is the structural schematic diagram of the pump coupling device comprising trapezoidal slats and pump light refractors in the first embodiment, as figure 2 Shown is a schematic structural diagram of a pump coupling device composed of a parallelogram slab and a pump light refractor in the first embodiment. In the first embodiment of the present invention, a pump coupling device is applied to a solid-state laser, such as figure 1 and figure 2 As shown, the device specifically includes the following components: a slab-shaped laser crystal 1 , and a first pump light refractor 2 , a second pump light refractor 3 , and a third pump light refractor 5 .
[0061] The slab-shaped laser crystal 1 is composed of a neodymium-doped yttrium-aluminum garnet (Nd:YAG) crystal, the upper and lower surfaces of which are electroplated with a silicon dioxide total reflection film, and the slab-shaped laser crystal is trapezoidal or parallelogram, and The two end fa...
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The invention relates to a pumping coupling device and method for strip-shaped laser crystals. The pumping coupling device comprises a strip-shaped laser crystal and a pumping light refraction body; the axial cross section of the strip-shaped laser crystal is in a trapezoid shape or a parallelogram shape; the two end surfaces of the strip-shaped laser crystal are cut along the longitudinal direction of the strip-shaped laser crystal and are coated with films; oscillating light is incident from one end of the strip-shaped laser crystal to be transmitted in strip-shaped laser crystal in a Z-shaped mode and then is emitted from the other end of the strip-shaped laser crystal; the pumping light refraction body is placed according to the cutting mode of the end face of the strip-shaped laser crystal; the pumping light is incident on the strip-shaped laser crystal through the pumping light refraction body; and the oscillating light and the pumping light are consistent in transmission paths in the strip-shaped laser crystal. Compared with the prior art, the problems of relatively poor mode matching, poor output light beam quality, low integration degree and the like of the existing strip-shaped laser crystal pumping technology are solved; and the pumping coupling device and method have the advantages of high mode matching degree of the pumping light and oscillating light, high outputlight beam quality and high pumping module integration degree.
Description
technical field [0001] The invention relates to the technical field of solid lasers, in particular to a pump coupling device and method for slab-shaped laser crystals. Background technique [0002] Solid-state lasers pumped by laser diodes with high power and high beam quality have always been the research focus and hot spot of solid-state lasers, and are widely used in laser processing, space lidar, space photoelectric countermeasures, laser medical treatment and other fields. One of the main bottlenecks restricting the development of all-solid-state lasers with high power and high beam quality is the thermal effect of the solid gain medium. At present, pumping parallel to the optical axis of the laser crystal or pumping perpendicular to the optical axis of the laser crystal are the main two pump coupling methods for all-solid-state lasers. [0003] The temperature gradient of the traditional slab laser only occurs in the thickness direction. In the slab laser, the zigzag ...
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IPC IPC(8): H01S3/091H01S3/08
CPCH01S3/08059H01S3/091
Inventor 李祚涵赵一鸣庞庆生李之通马勋鹏
Owner BEIJING RES INST OF TELEMETRY