Solid laser with optical fiber pump arrangement

Abstract

The invention discloses a solid laser with an optical fiber pump arrangement. The solid laser comprises a plurality of laser diodes, a circular convex lens and a truncated cone-shaped gain medium. Theplurality of laser diodes are arranged in a plane, the circular convex lens is positioned between the truncated cone-shaped gain medium and the plane of the plurality of laser diodes, wherein, an output terminal of each of the plurality of laser diodes is connected with an optical fiber, and the other end of the optical fibers is bunched. One end of the bunch is provided with a convergent lens. The convergent lens is positioned between the circular convex lens and the end of the bunch. The distance between the convergent lens and the circular convex lens is longer than sum of focal distance of the convergent lens and the focal distance of the circular convex lens. The focal distance of the circular convex lens is longer than length of the truncated cone-shaped gain medium. A larger section of the truncated cone-shaped gain medium is on one side of the circular convex lens and parallel to the circular convex lens and the convergent lens. Diameter of the larger section equals to the diameter of the circular convex lens, and the truncated cone-shaped gain medium and the circular convex lens are arranged in contact with each other.

Description

Solid-state laser with fiber-pumped device technical field The invention relates to an optical fiber pumping device, in particular to a solid-state laser using the pumping device, wherein the gain medium is in the shape of a truncated cone. Background technique The use of end-pumped solid-state lasers, including the use of lenses to couple pump light, is a technology well known in the art, and the pump light source used is a laser diode or other suitable pump sources; the solid gain medium is based on the required laser. Different dielectric materials are selected for different wavelengths. Crystals such as the well-known YAG are often used by those skilled in the art. The shape of the gain medium is generally round or rectangular. A cooling system is installed around the gain medium. Including water cooling and air cooling, and other suitable cooling devices, but this traditional pumping method and gain medium form is prone to a problem, that is, due to uneven pumping and...

AI Technical Summary

Problems solved by technology

The use of end-pumped solid-state lasers, including the use of lenses to couple pump light, is a technology well known in the art, and the pump light source used is a laser diode or other suitable pump sources; the solid gain medium is based on the required laser. Different dielectric materials are selected for different wavelengths. Crystals such as the well-known YAG are often used by those skilled in the art. The shape of the gain medium is generally round or rectangular. A cooling system is installed around the gain medium. Including water cooling and air cooling, and other suitable cooling devices, but this traditional pumping method and gain medium form is prone to a problem, that is, due to uneven pumping and cooling between the inner and outer layers of the gain medium The inhomogeneity of the laser will produce a temperature difference, and the temperature difference in the gain medium will cause many problems, such as causing damage to the gain medium itself, inhibiting the increase of the laser output power, especially because the temperature difference will also produce a refractive index difference inside the gain medium, Thus affecting the laser operation mode

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