Method for suppressing parasitic oscillation in gain medium of grazing incidence plate strip

A parasitic oscillation, gain medium technology, applied in the field of lasers, can solve problems such as consuming crystal energy storage

Inactive Publication Date: 2016-04-27
BEIJING UNIV OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, regardless of the corner cutting or roughening treatment, it only changes the propagation direction of the parasitic oscillating light. Under high gain, even the scattered light will form a relatively strong parasitic oscillation, which will consume the energy storage of the crystal or form ASE.

Method used

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  • Method for suppressing parasitic oscillation in gain medium of grazing incidence plate strip
  • Method for suppressing parasitic oscillation in gain medium of grazing incidence plate strip
  • Method for suppressing parasitic oscillation in gain medium of grazing incidence plate strip

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Embodiment 1

[0020] The scheme of the present invention is as follows, such as Figure 1.1-1.4 As shown, the crystal pumping surface 1.1, the non-clear surface 1.2, the crystal clear surface a2.1, the crystal clear surface b2.2, the crystal upper cooling surface 3.1, and the crystal lower cooling surface 3.2 are Nd:YAG slab crystals, respectively The six surfaces of the crystal pump surface 1.1 are coated with pump light antireflection coating; the crystal clear surface a2.1 and crystal clear surface b2.2 are the clear surfaces of the crystal. The surface is coated with oscillating light antireflection coating; the cooling surface 3.1 on the crystal and the cooling surface 3.2 on the lower crystal are the cooling surfaces of the crystal; the three non-light-transmitting surfaces are respectively the non-light-transmitting surface 1.2, the upper cooling surface 3.1, and the lower cooling surface 3.2. The upper cooling surface 3.1 of the crystal and the lower cooling surface 3.2 of the cryst...

Embodiment 2

[0024] The present invention also has an improved solution such as Figure 1.5 shown. If the germanium coating absorbs too much heat in actual use, such as being directly irradiated by pump light or signal light for a long time, it will lead to the fragmentation of the germanium coating, so that the germanium coating loses the ability to absorb parasitic oscillations in the crystal, and also It will affect the heat dissipation of the crystal. Therefore, between the crystal and the upper germanium coating layer 4.1 and the lower germanium coating layer 4.2, an upper isolation layer 6.1 and a lower isolation layer 6.2 are respectively added, and the upper isolation layer 6.1 is arranged between the upper germanium coating layer 4.1 and the crystal upper cooling surface 3.1; An isolation layer 6.2 is arranged between the lower cooling surface 3.2 of the crystal and the lower germanium coating 4.2.

[0025] The upper isolation layer 6.1 and the lower isolation layer 6.2 should m...

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Abstract

The invention relates to a method for suppressing parasitic oscillation in a gain medium of a grazing incidence plate strip. According to the method, a layer of dielectric material is plated on three non-light-through surfaces of the grazing incident plate strip, and the dielectric material shows the absorption characteristic on the parasitic oscillation of the gain medium. The method is simple and is wide in application range, and a better suppression effect on the parasitic oscillation is exerted. A plate strip crystal comprises six surfaces, the parasitic oscillation in the crystal can be enhanced by reflection or scattering of each surface, thus, an absorption medium is plated on all other surfaces except a pumping surface and a light through surface, and a parasitic oscillation loop is cut off to achieve an absorption effect. By the method, the parasitic oscillation of the gain medium with such structure can be effectively suppressed, the energy storage and the gain of the gain medium are improved, the amplified spontaneous radiation (ASE) of a system is reduced, and the output light pulse energy is improved. The method belongs to the technical field of laser.

Description

technical field [0001] The invention relates to a method for suppressing internal parasitic oscillation of a grazing incidence slab laser gain medium, which can effectively suppress the parasitic oscillation of the structural gain medium, improve the energy storage and gain of the gain medium, and reduce the amplified spontaneous emission (ASE) of the system. ) to increase the output light pulse energy. It belongs to the field of laser technology. Background technique [0002] At present, high-power solid-state lasers and laser amplifiers are widely used in industrial production, military weapons, scientific research and many other fields. The gain media of solid-state lasers are mostly in the form of blocks or slabs, especially the grazing incidence slab gain media, which have high gain and regular geometric shapes, and are prone to strong parasitic oscillations. The existence of parasitic oscillation in the laser amplifier causes the seed light to consume a large number ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/042H01S3/106
CPCH01S3/042H01S3/1061
Inventor 李强于灏洋程思齐姜梦华雷訇惠勇凌
Owner BEIJING UNIV OF TECH
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