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Composite structure type laser amplifier

A technology of laser amplifier and composite structure, applied in lasers, laser parts, laser parts and other directions, can solve the problem that lateral parasitic oscillation and pumping uniformity cannot be bypassed, high-quality laser output cannot be obtained, and the performance of laser ceramics needs to be improved and other problems, to achieve the effect of suppressing the coupling between transverse modes, small thermal distortion, and easy and simple installation.

Active Publication Date: 2017-05-31
SHANDONG INST OF AEROSPACE ELECTRONICS TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitations of the crystal growth principle, crystal materials are easy to be made into rods with relatively small lateral dimensions. Laser ceramics are a development direction, but the performance of laser ceramics still needs to be improved.
[0009] In summary, the current high-power, high-energy thin-sheet lasers and laser amplifiers still cannot get around the limitations of thermal effects, lateral parasitic oscillations, and pump uniformity, and cannot obtain high-quality laser output.

Method used

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  • Composite structure type laser amplifier

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specific Embodiment 1

[0051] The composite structural laser amplifier of this embodiment includes a wedge-shaped laser sheet 1, a pump laser 5, a laser sheet holder 2, a wedge-shaped laser sheet coupler 3, a coupler holder 4, a pump source heat sink 6, and a mounting plate 7; Laser sheet 1 is Nd:YAG crystal with a doping concentration of 1%, with a wedge angle of 2.86°, a length of 21mm, a height (2mm or 3mm), and a narrow width of 10mm. The side view is shown in Figure 2(a), and the top view is shown in Figure 2 As shown in (b); the wedge-shaped laser sheet 1 is installed in the laser sheet holder 2, together with the wedge-shaped laser sheet coupler 3 fixed in the coupler holder 4 and the pump laser 5 to form a laser amplifier; figure 1 It is a schematic diagram of the composite structural wedge-shaped laser sheet unit of the present invention, the pump light is incident from the positive direction of X, transmitted along the Z direction, the thickness of the wedge-shaped laser sheet increases alo...

specific Embodiment 2

[0055] A laser amplifier based on a composite structure of the present invention is used as a basic array element of the laser weapon amplification system. This embodiment adopts a weapon-level array type strong laser amplifier with 4 basic array elements, wherein the wedge-shaped laser sheet 1 of the basic array element, Four pump lasers 5, laser sheet fixtures 2, wedge-shaped laser sheet couplers 3, coupler fixtures 4, and pump source heat sinks 6 are selected respectively, and the four pump lasers 5 are placed side by side or placed in wedge-shaped laser beams. The two sides of the structure composed of the sheet 1 and the wedge-shaped laser sheet coupler 3 are independent and isolated from each other, and the installation method is the same as that of the first embodiment, such as image 3 As shown, the wedge-shaped thin laser sheet in this embodiment is spliced ​​by extending in the y direction, which is beneficial to suppress the transverse inter-mode coupling according t...

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Abstract

The invention provides a composite structure type laser amplifier. The composite structure type laser amplifier comprises a wedge-shaped laser slice coupler 3 and a wedge-shaped laser slice 1 used as a gain medium, wherein the wedge-shaped laser slice 1 and the wedge-shaped laser slice coupler 3 are both thin-long slices, and the longitudinal sections thereof are of isosceles trapezoid; the thick-end end planes of the wedge-shaped laser slice 1 and the wedge-shaped laser slice coupler 3 are coaxially spliced; and meanwhile, the thin-end end plane of the wedge-shaped laser slice coupler 3 receives an incident pumping laser beam, and the wedge-shaped laser slice coupler 3 couples the pumping laser beam to the wedge-shaped laser slice 1. According to the composite structure type laser amplifier, pumping light is incident from the thin-end end plane of the wedge-shaped laser slice coupler, so that pumping light absorption can be more uniform and coupling efficiency of the pumping light can be improved; the light is internally and totally reflected on boundary of the wedge-shaped laser slice, so that the absorption length of the absorbed light is prolonged and the wedge-shaped laser slice is uniformly pumped.

Description

technical field [0001] The invention belongs to the technical field of laser amplifiers, in particular to a composite structure laser amplifier. Background technique [0002] At present, the thin-film laser amplifier mainly uses the fast heat dissipation of the thin-sheet and the large aperture, which can obtain stronger laser output by enlarging the aperture. However, the lateral gain length of a thin-sheet laser amplifier is always much larger than its thickness, and the lateral parasitic oscillation greatly limits the output power output. The method of increasing the output power by increasing the transverse cross-sectional area cannot be realized. The result is that the light emitting area is still very small, generally about 10 mm in diameter. [0003] Usually the diameter of the laser rod output single mode, only a few millimeters in diameter. With thin-film laser ceramics, it is hoped that the diameter of the thin film will be 10 to 20 cm. As a result, the lateral...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/04H01S3/10
CPCH01S3/0408H01S3/10023
Inventor 黄秀军赵爽徐红艳宋镇江刘莹石德乐
Owner SHANDONG INST OF AEROSPACE ELECTRONICS TECH
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