CN216489002U - High-power laser of fiber laser pumping - Google Patents

Abstract

The embodiment of the present utility model discloses a high-power laser pumped by a fiber laser, comprising at least one fiber laser, a laser resonant cavity and an electrical control system, the laser resonant cavity comprising an optical lens and a laser working substance, the The fiber laser is connected with the optical lens, the optical lens is connected with the laser working substance, and the fiber laser is connected with the electronic control system; the wavelength of the fiber laser is located in the absorption area of the high-power laser, and is The laser working substance absorbs to form fundamental frequency laser oscillation. The embodiment of the utility model realizes compatibility with high slope efficiency and weakens the influence of thermal effect on the performance of the laser.

Description

A high-power laser pumped with a fiber laser

technical field

The utility model relates to the technical field of lasers, in particular to a high-power laser pumped by a fiber laser.

Background technique

In the development of solid-state lasers, how to overcome the various thermal effects of the gain medium due to heat generation and how to improve the slope efficiency of the laser have always been the problems that solid-state laser researchers have focused on solving. The fundamental way to solve these problems is to use high-brightness pump Puyuan. At present, the semiconductor laser pump source, which is widely used in solid-state lasers, has improved the brightness of the output spot compared with the traditional flash lamp pump source. However, in order to improve the output coupling efficiency of the semiconductor laser, this type of pump source is often used. The output of multi-mode fiber makes the improvement of brightness still limited, that is to say, the existing lasers are not compatible with high slope efficiency and reduce the influence of thermal effects on laser performance.

Therefore, it is necessary to design a new laser that can achieve compatible high slope efficiency and reduce the influence of thermal effects on laser performance.

Utility model content

The technical problem to be solved by the utility model is to provide a high-power laser pumped by a fiber laser.

In order to solve the above-mentioned technical problems, the purpose of this utility model is achieved through the following technical solutions: a high-power laser pumped with a fiber laser is provided, comprising at least one fiber laser, a laser resonator and an electronic control system, the The laser resonator includes an optical lens and a laser working material, the fiber laser is connected with the optical lens, the optical lens is connected with the laser working material, and the fiber laser is connected with the electronic control system; the fiber laser The wavelength is located in the absorption region of the high-power laser, and is absorbed by the laser working material to form fundamental frequency laser oscillation.

Its further technical scheme is: the optical fiber of the fiber laser is a polarized optical fiber.

Its further technical scheme is: the fiber laser is a single-mode laser.

Its further technical scheme is: the fiber laser is a multi-mode laser.

Its further technical scheme is: a beam shaping device is connected between the fiber laser and the optical lens.

Its further technical scheme is: the laser working substance is at least one of solid, metal, gas and liquid.

Its further technical scheme is: the laser working material is rare earth element doped glass or rare earth element doped crystal.

Its further technical scheme is: the number of the optical lenses is at least two.

Its further technical scheme is: a crystal is arranged in the laser resonant cavity.

Its further technical scheme is: the frequency doubling of the crystal is double frequency or triple frequency.

Compared with the prior art, the utility model has the following beneficial effects: by using the fiber laser as the pumping source, the overlapping of the pumping light and the signal light is strengthened, thereby improving the absorption efficiency of the pumping light; at the same time, Using the laser working material, the laser will obtain higher slope efficiency, and at the same time, because the laser working material becomes longer, heat dissipation becomes easier, thereby reducing the influence of thermal effects on laser performance, achieving compatible high slope efficiency and reducing thermal effects on laser performance. Impact.

The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic block diagram of a high-power laser pumped by a fiber laser according to an embodiment of the present invention.

Description in the figure:

10. Fiber laser; 20. Beam shaping device; 30. Optical lens; 40. Laser working substance.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, not all of the embodiments. . Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It is to be understood that, when used in this specification and the appended claims, the terms "comprising" and "comprising" indicate the presence of the described features, integers, steps, operations, elements and/or components, but do not exclude one or The presence or addition of a number of other features, integers, steps, operations, elements, components, and/or sets thereof.

It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural unless the context clearly dictates otherwise.

It should also be further understood that, as used in this specification and the appended claims, the term "and/or" refers to any and all possible combinations of one or more of the associated listed items, and including these combination.

Please refer to FIG. 1. FIG. 1 is a schematic block diagram of a high-power laser pumped by a fiber laser according to an embodiment of the present invention. The high-power laser can be used in laser processing scenarios to achieve compatible high slope efficiency and reduce the impact of thermal effects on laser performance.

Referring to FIG. 1, the above-mentioned high-power laser pumped by a fiber laser includes at least one fiber laser 10, a laser resonator and an electronic control system. The laser resonator includes an optical lens 30 and a laser working substance 40. The fiber The laser is connected to the optical lens 30, the optical lens 30 is connected to the laser working substance 40, and the fiber laser 10 is connected to the electronic control system; the wavelength of the fiber laser 10 is located in the absorption area of the high-power laser, and is absorbed by the laser working substance 40 to form a fundamental frequency laser oscillation.

In this embodiment, the wavelength of the fiber laser 10 is located in the absorption region of the high-power laser, and the fiber laser enters the laser resonator composed of at least two optical lenses 30 and the laser working substance 40 through an optical pump coupling system, and is The laser working substance 40 absorbs to form fundamental frequency laser oscillation.

In one embodiment, the optical fiber of the above-mentioned fiber laser 10 is a polarized optical fiber.

In one embodiment, the above-mentioned fiber laser 10 is a single-mode laser.

In one embodiment, the above-mentioned fiber laser 10 is a multi-mode laser.

In one embodiment, please refer to FIG. 1 , a beam shaping device 20 is connected between the above-mentioned fiber laser 10 and the optical lens 30 . The pump light emitted by the fiber laser 10 enters the laser resonator and the laser working substance 40 through the beam shaping device 20 .

In this embodiment, the beam shaping device 20 is, but is not limited to, a pumping combiner. The pumping combiner is a fiber-pumping combiner based on the fusion taper technology in this embodiment, which realizes multiple pumping Combination of Pu light and signal light.

In one embodiment, the above-mentioned laser working substance 40 is at least one of solid, metal, gas, and liquid.

In one embodiment, the above-mentioned laser working material 40 is a rare earth element doped glass or a rare earth element doped crystal. The laser working material 40 includes but is not limited to neodymium-doped yttrium aluminum garnet (Nd:YAG), ytterbium-doped yttrium aluminum garnet (Yb:YAG), neodymium-doped yttrium vanadate (Nd:YVO4), neodymium-doped gadolinium tungsten acid Potassium (Nd: KGW), ytterbium-doped potassium gadolinium tungstate (Yb: KGW); the above-mentioned high-power laser pumped by a fiber laser also includes a heating device for temperature-controlling the gain medium. The rare earth doped glass or rare earth doped crystal is selected according to the desired output wavelength of the fiber laser 10 . At the same time, according to different output requirements for the fiber laser 10, a single-clad rare-earth fiber and a double-clad can be doped with rare earth.

In one embodiment, the number of the above-mentioned optical lenses 30 is at least two.

In one embodiment, the above-mentioned laser resonator is provided with a crystal. Specifically, the frequency doubling of the crystal is frequency doubling or frequency doubling. The laser resonator may contain a frequency doubling, frequency doubling or higher frequency doubling crystal to form the harmonic output of the fundamental frequency light.

The pump light emitted by the fiber laser 10 enters the laser resonator and the laser working material 40 after being processed by at least one of MOPA modulation and Raman effect.

The specific working mode of the high-power laser pumped by the fiber laser 10 in this example is: after the fiber laser 10 with a wavelength of 914 nm, or 940 nm, or 976 nm is input to the optical lens 30 through the beam shaping device 20, it is coupled to the optical lens 30. The laser working substance 40, and the wavelength of the fiber laser 10 is absorbed by the laser working substance 40 to form fundamental frequency laser oscillation and then output.

The above-mentioned high-power laser pumped by a fiber laser, by using the fiber laser 10 as a pump source, the overlap of the pump light and the signal light is enhanced, thereby improving the absorption efficiency of the pump light; at the same time, using a laser Working material 40, the laser will obtain higher slope efficiency. At the same time, because the laser working material 40 becomes longer, heat dissipation becomes easier, thereby reducing the influence of thermal effects on laser performance, achieving compatibility with high slope efficiency and reducing thermal effects on laser performance. Impact.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Equivalent modifications or replacements should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (10)

1. a high-power laser pumped with a fiber laser, is characterized in that, comprises at least one fiber laser, a laser resonator and an electrical control system, and the laser resonator comprises an optical lens and a laser working substance, and the fiber The laser is connected with the optical lens, the optical lens is connected with the laser working substance, and the fiber laser is connected with the electronic control system; the wavelength of the fiber laser is located in the absorption area of the high-power laser, and is The laser working substance absorbs to form fundamental frequency laser oscillation. 2 . The high-power laser pumped by a fiber laser according to claim 1 , wherein the fiber of the fiber laser is a polarized fiber. 3 . 3 . The high-power laser pumped by a fiber laser according to claim 1 , wherein the fiber laser is a single-mode laser. 4 . 4 . The high-power laser pumped by a fiber laser according to claim 1 , wherein the fiber laser is a multimode laser. 5 . 5 . The high-power laser pumped by a fiber laser according to claim 1 , wherein a beam shaping device is connected between the fiber laser and the optical lens. 6 . 6 . The high-power laser pumped by a fiber laser according to claim 1 , wherein the laser working substance is at least one of solid, metal, gas, and liquid. 7 . 7 . The high-power laser pumped by a fiber laser according to claim 1 , wherein the laser working material is rare-earth-doped glass or rare-earth-doped crystal. 8 . 8 . The high-power laser pumped by a fiber laser according to claim 1 , wherein the number of the optical lenses is at least two. 9 . 9 . The high-power laser pumped by a fiber laser according to claim 1 , wherein the laser resonator is provided with a crystal. 10 . 10 . The high-power laser pumped by a fiber laser according to claim 9 , wherein the frequency doubling of the crystal is frequency doubling or frequency doubling. 11 .

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