CN-122026210-A - Multi-pass reflection slat laser oscillation device

Abstract

The application provides a multi-path reflection slat laser oscillation device, which relates to the technical field of solid laser and comprises a pumping source, a first cavity mirror, a second cavity mirror, a first reflecting mirror, a second reflecting mirror and a laser material, wherein the first reflecting mirror and the second reflecting mirror are respectively arranged on two sides of the laser material, the first cavity mirror and the first reflecting mirror are positioned on the same side of the laser material, and the second cavity mirror and the second reflecting mirror are positioned on the same side of the laser material. Compared with the traditional scheme, the laser oscillation is realized through multi-path reflection, and compared with the problems of large light spot caliber, high temperature gradient and poor light beam quality in the width direction, the laser oscillation structure has the advantages that the smaller light spot caliber is used for resonance in a cavity, so that the temperature gradient in the area where the light spot is positioned in the resonance process is small, the deterioration of the light beam quality is greatly reduced, the light beam quality can be obviously improved, the pulse output can be realized by using a smaller caliber Q switch in combination with an unstable cavity structure, and the subsequent amplification or frequency conversion can be continued.

Inventors

• BO YONG
• SONG YANJIE
• Lang Bingtian

Assignees

• 中国科学院理化技术研究所

Dates

Publication Date

20260512

Application Date

20260213

Claims (10)

1. 1. The multi-path reflection slat laser oscillation device is characterized by comprising a pumping source, a first cavity mirror, a second cavity mirror, a first reflecting mirror, a second reflecting mirror and a laser material; the first reflecting mirror and the second reflecting mirror are respectively arranged on two sides of the laser material; the first cavity mirror and the first reflecting mirror are positioned on the same side of the laser material, and the second cavity mirror and the second reflecting mirror are positioned on the same side of the laser material; The pump source is used for generating pump light, and the pump light enters the laser material to excite the laser material to generate laser; The first cavity mirror, the first reflecting mirror and the second reflecting mirror are used for reflecting the laser so that the laser is output from the second cavity mirror.
2. 2. The device of claim 1, wherein the first and second reflectors are symmetrically distributed on both sides of the laser material according to a preset included angle; The pump source is positioned on one side of the first reflecting mirror or the second reflecting mirror far away from the laser material, and the pump light passes through the first reflecting mirror or the second reflecting mirror to enter the laser material so as to excite the laser material to generate laser.
3. 3. The device according to claim 2, wherein the side of the laser material is provided with a pump light high-transmission film and a laser light high-transmission film; The reflecting mirror is provided with a laser high-reflection film and the pumping light high-transmission film.
4. 4. The apparatus of claim 1, wherein the pump source is located above or below the laser material such that the pump light enters the laser material from an upper or lower facet of the laser material, the upper or lower facet being a surface of the laser material that is perpendicular to the reflective surfaces of the first and second mirrors.
5. 5. The device according to claim 4, wherein the side surface of the laser material is provided with a laser high-transmission film, and the upper large surface and the lower large surface of the laser material are respectively provided with a pump light high-transmission film and a pump light high-reflection film; The reflecting mirror is provided with a laser high-reflection film.
6. 6. The apparatus of claim 1, further comprising a scraper mirror; The scraper mirror is positioned between the second cavity mirror and the laser material, and the laser is output through the scraper mirror.
7. 7. The apparatus of claim 1, further comprising a laser switch; the laser switch is positioned between the second cavity mirror and the laser material, and is used for controlling the laser to form pulse modulation output through the second cavity mirror.
8. 8. The apparatus of any one of claims 1 to 7, wherein the first endoscope is provided with a laser highly reflective film and the second endoscope is provided with the laser highly reflective film or a laser partially transmissive film; The first reflecting mirror and the second reflecting mirror are plane mirrors, cylindrical mirrors or curved mirrors.
9. 9. The apparatus of any one of claims 1 to 7, wherein the laser material comprises a first laser material and a second laser material; The first laser material and the second laser material are arranged between the first reflecting mirror and the second reflecting mirror along a first direction or a second direction, and the first direction and the second direction are mutually perpendicular in the same plane.
10. 10. The apparatus of any one of claims 1 to 7, further comprising a thermal management component comprising a waveguide rack or a heat sink; the waveguide rack is used for providing a cooling water channel, and the heat sink is used for cooling the laser material.

Description

Multi-pass reflection slat laser oscillation device Technical Field The application belongs to the technical field of solid laser, and particularly relates to a multi-pass reflection slat laser oscillation device. Background In the field of application of modern laser technology, high-energy lasers play a vital role. With advances in technology, increased industrial processing demands, and defense and military requirements, the demand for higher energy lasers is becoming more and more urgent. Conventional rod laser schemes that produce high energy lasers are limited by severe thermal effects, with average powers in excess of kilowatt (kW) levels. The traditional Zigzag slab laser scheme has the problems of large spot size, large temperature gradient, poor beam quality and the like in the width direction, and limits the improvement of high-energy laser brightness. Disclosure of Invention The application provides a multi-path reflection slat laser oscillation device which is used for solving the problems of large light spot size, larger temperature gradient and poor light beam quality. In order to achieve the above purpose, the application adopts the following technical scheme: in a first aspect, an embodiment of the present application provides a multi-pass reflective slab laser oscillation apparatus, the apparatus including a pump source, a first cavity mirror, a second cavity mirror, a first mirror, a second mirror, and a laser material; the first reflecting mirror and the second reflecting mirror are respectively arranged on two sides of the laser material; the first cavity mirror and the first reflecting mirror are positioned on the same side of the laser material, and the second cavity mirror and the second reflecting mirror are positioned on the same side of the laser material; The pump source is used for generating pump light, and the pump light enters the laser material to excite the laser material to generate laser; The first cavity mirror, the first reflecting mirror and the second reflecting mirror are used for reflecting the laser so that the laser is output from the second cavity mirror. Optionally, the first reflecting mirror and the second reflecting mirror are symmetrically distributed on two sides of the laser material according to a preset included angle; The pump source is positioned on one side of the first reflecting mirror or the second reflecting mirror far away from the laser material, and the pump light passes through the first reflecting mirror or the second reflecting mirror to enter the laser material so as to excite the laser material to generate laser. Optionally, a pumping light high-transmission film and a laser high-transmission film are arranged on the side surface of the laser material; The reflecting mirror is provided with a laser high-reflection film and the pumping light high-transmission film. Optionally, the pump source is located above or below the laser material, so that the pump light enters the laser material from an upper large surface or a lower large surface of the laser material, where the upper large surface or the lower large surface is a surface perpendicular to the reflecting surfaces of the first reflecting mirror and the second reflecting mirror. Optionally, a laser high-transmission film is arranged on the side surface of the laser material, and a pump light high-transmission film and a pump light high-reflection film are respectively arranged on the upper large surface and the lower large surface of the laser material; The reflecting mirror is provided with a laser high-reflection film. Optionally, the first cavity mirror and the second cavity mirror respectively reflect the laser light to form a two-way oscillation. Optionally, the device further comprises a waveguide or a diaphragm; The waveguide or the diaphragm is located between the first cavity mirror and the laser material or between the second cavity mirror and the laser material for limiting the oscillation mode volume of the laser. Optionally, the device further comprises an optically active crystal or a quarter wave plate; the optical rotation crystal or the quarter wave plate is used for compensating thermal depolarization of the laser material The optically active crystal or the quarter wave plate is located on the reflecting surface of the first reflecting mirror and/or the second reflecting mirror. Optionally, the device further comprises a scraper mirror; The scraper mirror is positioned between the second cavity mirror and the laser material, and the laser is output through the scraper mirror. Optionally, the device further comprises a laser switch; the laser switch is positioned between the second cavity mirror and the laser material, and is used for controlling the laser to form pulse modulation output through the second cavity mirror. Optionally, the first cavity mirror is provided with a laser high-reflection film, and the second cavity mirror is provided with the laser high-reflec