CN-122026211-A - Composite lath amplifying laser device

CN122026211ACN 122026211 ACN122026211 ACN 122026211ACN-122026211-A

Abstract

The application provides a composite slab amplified laser device, which relates to the technical field of solid laser and comprises a pumping source, pumping coupled laser devices and reflecting mirrors, wherein the pumping source is used for outputting pumping light, the pumping coupled laser devices are positioned on a propagation path of the pumping light and are used for receiving the pumping light, so that the pumping light enters the pumping coupled laser devices and provides energy to the pumping coupled laser devices to generate laser, and the reflecting mirrors are symmetrically distributed on two sides of the pumping coupled laser devices according to preset included angles and are used for reflecting the laser so as to enable the laser to propagate in the pumping coupled laser devices for multiple times. According to the technical scheme provided by the application, the pumping light is injected into the laser gain medium from the upper large surface of the laser material in the pumping coupling laser device, so that more pumping power can be injected and the difficulty of the film coating process of the reflecting mirror is reduced, thereby being beneficial to improving the laser output power and reducing the cost.

Inventors

BO YONG
SONG YANJIE
Lang Bingtian
Che Jiyu

Assignees

中国科学院理化技术研究所

Dates

Publication Date: 20260512
Application Date: 20260213

Claims (10)

1. A composite slab amplified laser device is characterized by comprising a pumping source, a pumping coupling laser device and a reflecting mirror; The pump source is used for outputting pump light, the pump coupling laser device is positioned on a propagation path of the pump light and used for receiving the pump light, so that the pump light enters the pump coupling laser device and provides energy to excite the pump coupling laser device to generate laser; The reflecting mirrors are symmetrically distributed on two sides of the pump coupling laser device according to preset included angles and are used for reflecting the laser so that the laser propagates in the pump coupling laser device for multiple times.
2. The apparatus of claim 1, wherein the pump coupling laser device is comprised of a pump coupling device and a laser material, the pump coupling device and the laser material being bonded by bonding or sintering; The pump coupling device is used for reflecting the pump light to guide the pump light to be coupled into the laser material, and the upper large surface is any plane with the largest area of the laser material; The laser material is excited by energy provided by the pump light to generate the laser; the reflecting mirrors are symmetrically distributed on two sides of the laser material and are used for reflecting the laser.
3. The apparatus of claim 2, wherein the pump coupling device is a pillar having a trapezoidal cross section; The plane where the long bottom of the trapezoid is located is the incidence plane of the pumping coupling device, and the pumping light enters the pumping coupling device through the incidence plane of the pumping coupling device; The plane where any one waist of the trapezoid is located is a reflecting surface of the pump coupling device, and when the pump light propagates in the pump coupling device, the pump light is reflected by the reflecting surface of the pump coupling device to form the reflected light.
4. The apparatus of claim 3, wherein an incident surface of the pump coupling device is provided with a pump light antireflection film; The reflecting surface of the pump coupling device is provided with a pump light high-reflection film.
5. The apparatus of claim 2, wherein the lower facet of the laser material is provided with a pump light highly reflective film, the lower facet of the laser material being a plane of the laser material that is coincident with an edge of the pump coupled laser device; The side face of the laser material is provided with a laser antireflection film, and the side face is a plane which is closest to the reflecting mirror in the laser material.
6. The apparatus of claim 1, wherein a plane of the mirror for reflecting the laser light is provided with a laser highly reflective film.
7. The apparatus of claim 1, further comprising a thermal management component comprising a waveguide rack and a heat sink; The thermal management component is used for carrying out forced convection cooling and forced convection conduction cooling on the pump coupling laser device, and the waveguide frame is used for providing a cooling water channel.
8. The apparatus of any one of claims 1 to 7, wherein the pump coupling device of the pump coupling laser devices is made of waveguide, glass or transparent window ceramic.
9. The apparatus of any one of claims 1 to 7, wherein the pump source is a bar array, the bar array being in a linear, stacked or planar array.
10. The apparatus of any one of claims 1 to 7, wherein the laser material in the pump coupled laser device is a laser gain material, the active ions of the laser material include at least one of neodymium, ytterbium, titanium, praseodymium, chromium, thulium or holmium, and the matrix material of the laser material is glass, ceramic or crystal.

Description

Composite lath amplifying laser device Technical Field The application belongs to the technical field of solid laser, and particularly relates to a composite lath amplifying laser device. Background In the application field of modern laser technology, innoslab-structure lasers are widely applied to slab laser amplification devices, in particular to ultra-short pulse slab laser amplification. The conventional Innoslab slab laser amplifying device adopts a side pumping scheme, adopts a side pumping scheme for injection, is influenced by the lateral dimension of the slab, and causes low injectable pumping power. In addition, as the Innoslab strip laser amplifying device is provided with two reflectors on the side surface for realizing the laser to be incident on the strip for multiple times, the reflectors need to realize high transmission and high reflection of pumping light at the same time, so that the difficulty of the reflector coating process is increased suddenly. Disclosure of Invention The application provides a composite slab amplifying laser device, which solves the problems that the injectable pumping power is low due to the influence of the lateral dimension of a slab, and the difficulty of a reflector coating process is suddenly increased due to the fact that pumping light is high in transmittance and laser light is high in reflection. 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 composite slab amplification laser apparatus, the apparatus including a pump source, a pump coupled laser device, and a mirror; The pump source is used for outputting pump light, the pump coupling laser device is positioned on a propagation path of the pump light and used for receiving the pump light, so that the pump light enters the pump coupling laser device and provides energy to excite the pump coupling laser device to generate laser; The reflecting mirrors are symmetrically distributed on two sides of the pump coupling laser device according to preset included angles and are used for reflecting the laser so that the laser propagates in the pump coupling laser device for multiple times. Optionally, the pump coupling laser device is composed of a pump coupling device and a laser material, and the pump coupling device and the laser material are combined in a bonding or sintering mode; The pump coupling device is used for reflecting the pump light to guide the pump light to be coupled into the laser material, and the upper large surface is any plane with the largest area of the laser material; The laser material is excited by energy provided by the pump light to generate the laser; the reflecting mirrors are symmetrically distributed on two sides of the laser material and are used for reflecting the laser. Optionally, the pump coupling device is a columnar body with a trapezoid cross section; The plane where the long bottom of the trapezoid is located is the incidence plane of the pumping coupling device, and the pumping light enters the pumping coupling device through the incidence plane of the pumping coupling device; The plane where any one waist of the trapezoid is located is a reflecting surface of the pump coupling device, and when the pump light propagates in the pump coupling device, the pump light is reflected by the reflecting surface of the pump coupling device to form the reflected light. Optionally, the incident surface of the pump coupling device is provided with a pump light antireflection film; The reflecting surface of the pump coupling device is provided with a pump light high-reflection film. Optionally, a pump light high reflection film is arranged on the lower large surface of the laser material, and the lower large surface of the laser material is a plane which is consistent with the edge of the pump coupling laser device in the laser material; The side face of the laser material is provided with a laser antireflection film, and the side face is a plane which is closest to the reflecting mirror in the laser material. Optionally, a laser high-reflection film is arranged on the plane of the reflecting mirror for reflecting the laser. Optionally, the device further comprises a thermal management component comprising a waveguide rack and a heat sink; The thermal management component is used for carrying out forced convection cooling and forced convection conduction cooling on the pump coupling laser device, and the waveguide frame is used for providing a cooling water channel. Optionally, the pump coupling device in the pump coupling laser device is made of waveguide, glass or transparent window ceramic. Optionally, the pump source is a bar array, and the bar array is a linear array, a stacked array or an area array. Optionally, the laser material in the pump coupling laser device is a laser gain material, the active ions of the laser material comprise at least one of neodymium, ytte