A crystal device

Abstract

The invention relates to the field of the optics and laser, in particular to a structure of optics or laser crystal. The crystal device comprises a crystal, a first window diaphragm and a second window diaphragm, wherein, the first window diaphragm is glued with an incident optical surface of the crystal; and the second window diaphragm is glued with an emergent optical surface. The first window diaphragm or the second window diaphragm is plated by a dielectric film. The side surfaces of the contact surfaces among the crystal, the first window diaphragm and the second window diaphragm are adhered by UV adhesive; the non-light through an upper bottom surface and a non-light through lower bottom surface of the crystal are respectively provided with a protection plate, and the protection plates are adhered with the crystal by the UV adhesive. The refractive indexes of the first window diaphragm and the second window diaphragm are identical or similar to the refractive index of the crystal. Due to the technical proposal, the invention can prevent the film damage from influencing the performances of the laser, or prevent the deliquescence of the crystal or prevent the direct plating on the surface of the optical crystal from causing the film damage or shedding and the like, thereby improving the damage threshold and the laser power of the laser and broadening the application range of certain crystals.

Description

technical field [0001] The invention relates to the fields of optics and lasers, in particular to the structure of optics or laser crystals. Background technique [0002] The laser damage to the laser matrix and components in the laser system determines the limit of the effective performance of the solid-state laser. In general, the damage threshold depends on the surface finish and optical coating of each optical component, not on the bulk material. Defects such as scratches, flaws, and imperfections on the surface of optical components reduce the damage threshold of the surface of optical components, and laser systems generally need to be coated with various multilayer dielectric films. Multilayer dielectric film is the most fragile component in all laser systems. Some defects and changes in the process of film production and laser use may cause film damage, making the damage threshold of the film lower than the bulk structure of the same material, thereby reducing the la...

AI Technical Summary

Problems solved by technology

[0005] In the visible laser system, due to the existence of the dielectric film, the damage threshold of the laser is greatly reduced, and the increase of the laser output power and the extension of the service life are limited.

[0006] In addition, some crystal surfaces are prone to deliquescence, such as β-BaB 2 o 4 (β-BBO) crystals, whose surface finish is easily damaged due to moisture absorption; some crystals have very different thermal expansion coefficients in each axis, and cannot be coated or are difficult to coat, such as LiB 3 o 5 (LBO) crystals have large differences in thermal expansion coefficients in different directions (α x =10.8×10 -5 / K,α y =-8.8×10 -5 / K,α z =3.4×10 -5 / K), and each axial thermal expansion coefficient changes with the crystal temperature, and the coating layer on its surface is prone to crack damage, thus affecting the service life of the film layer and the laser power resistance.

These shortcomings undoubtedly reduce the damage threshold and service life of the laser, and also limit the use of some crystals

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