CN-121035745-B - Laser output device with crystal heated uniformly

Abstract

The invention relates to a laser output device for uniformly heating crystals, which comprises a columnar body formed by encircling an outer wall and extending a specific distance along a light path, wherein a light inlet is arranged at a first end of the body, a light outlet is arranged at a second end of the body, a laser resonant cavity is arranged between the light inlet and the light outlet, crystals are arranged in the laser resonant cavity, heating elements are arranged between the outer wall and the resonant cavity and are parallel to the light path and uniformly distributed between the outer wall and the resonant cavity in the circumferential direction, an air inlet is arranged at the first end of the body, an air outlet is arranged at the second end of the body, an air inlet runner is further arranged in the body, the air inlet runner is positioned at the front end of the crystals, air flows into the air inlet runner from the air inlet first, flows through the crystals in the resonant cavity after being homogenized through the air inlet, and is finally discharged from the air outlet.

Inventors

• NIU GANG
• CHEN JUNGUI
• LI WEIPING
• XIE WEN
• Lei Chunhui
• WANG SHAOZHONG

Assignees

• 广州超源激光技术有限公司

Dates

Publication Date

20260512

Application Date

20250811

Claims (6)

1. 1. The laser output device is characterized by comprising a columnar body formed by encircling an outer wall and extending along a light path, wherein a light inlet is formed in a first end of the body, a light outlet is formed in a second end of the body, a laser resonant cavity is arranged between the light inlet and the light outlet, a crystal is arranged in the laser resonant cavity, heating elements are further arranged between the outer wall and the resonant cavity, the heating elements are parallel to the light path and are circumferentially and uniformly distributed between the outer wall and the resonant cavity, a gas inlet is formed in the first end of the body, a gas outlet is formed in the second end of the body, a gas inlet runner is further arranged in the body, and the gas inlet runner is positioned at the front end of the crystal; The air inlet flow channel comprises a first air inlet cavity and a second air inlet cavity which are cascaded, wherein the first end of the first air inlet cavity is communicated with the air inlet, the second end of the first air inlet cavity is communicated with the first end of the second air inlet cavity through a first air inlet small hole, the air inlet flow channel further comprises a third air inlet cavity cascaded with the second air inlet cavity, the first end of the third air inlet cavity is communicated with the second end of the second air inlet cavity through a second air inlet small hole, the second end of the third air inlet cavity is used for transmitting air to the crystal direction through a third air inlet small hole, and the first air inlet cavity, the second air inlet cavity and the third air inlet cavity are hollow annular cylinders which are coaxially nested, wherein the outer wall of the third air inlet cavity is positioned in an annular space formed by the inner wall of the second air inlet cavity, and the air passes through the second air inlet cavity and the third air inlet cavity in a roundabout way; The covering length of the heating element along the light path direction is greater than or equal to the sum of the axial length of the air inlet flow channel and the axial length of the crystal, the air flows into the air inlet flow channel from the air inlet, is synchronously heated and homogenized by the heating element in the process of flowing through the first air inlet cavity, the second air inlet cavity and the third air inlet cavity, forms air flow with consistent temperature distribution, flows through the crystal, and is finally discharged from the air outlet.
2. 2. The device of claim 1, wherein the rear end of the crystal is further provided with an air outlet channel, and the air outlet channel is communicated with the air outlet.
3. 3. The device of claim 2, wherein the air outlet channel comprises a first air outlet cavity and a second air outlet cavity which are cascaded, a first end of the first air outlet cavity is connected to the rear end of the crystal through a first air outlet small hole, a second end of the first air outlet cavity is communicated with a first end of the second air outlet cavity through a second air outlet small hole, and a second end of the second air outlet cavity is communicated with the air outlet.
4. 4. The laser output apparatus with uniform heating of crystal according to claim 3, wherein the first air outlet cavity and the second air outlet cavity are hollow annular cylinders, wherein the volume of the first air outlet cavity is smaller than that of the second air outlet cavity, and the aperture of the first air outlet small hole is smaller than that of the air outlet.
5. 5. A uniformly heated laser output apparatus according to claim 1, wherein the gas is at least one inert gas selected from the group consisting of argon, helium, nitrogen, krypton and xenon, and has a purity of not less than 99.99%.
6. 6. The laser output apparatus with homogeneously heated crystal as claimed in claim 1, wherein the light inlet and the light outlet are respectively provided with lenses.

Description

Laser output device with crystal heated uniformly Technical Field The invention relates to the technical field of lasers, in particular to a laser output device with crystals heated uniformly. Background In the conventional laser crystal heating device, the crystals cannot be heated uniformly, so that the temperature field of the crystals is not uniform in the use process, and under severe conditions, the local temperature of the crystals can be abnormally increased, in such conditions, the aging speed of the crystals can be increased, the breakage of the crystals can be initiated, and the stability of the whole laser system is inevitably damaged and the service life of the laser system is shortened. Disclosure of Invention Based on the above, the invention provides a laser output device with the crystal heated uniformly, which greatly improves the uniformity of the crystal heated, ensures the stability of a laser system and prolongs the service life of the laser system. In order to achieve the above purpose, the invention provides a laser output device for uniformly heating crystals, which comprises a columnar body formed by encircling an outer wall and extending along a light path for a specific distance, wherein a first end of the body is provided with a light inlet, a second end of the body is provided with a light outlet, a laser resonant cavity is arranged between the light inlet and the light outlet, crystals are arranged in the laser resonant cavity, heating elements are further arranged between the outer wall and the resonant cavity, the heating elements are parallel to the light path and uniformly distributed between the outer wall and the resonant cavity in the circumferential direction, a first end of the body is provided with an air inlet, a second end of the body is provided with an air outlet, an air inlet runner is further arranged in the body, the air inlet runner is positioned at the front end of the crystals, and the air flows into the air inlet runner firstly, flows through the crystals in the resonant cavity after being homogenized by the air inlet runner, and is finally discharged from the air outlet. In one specific embodiment, the air inlet channel comprises a first air inlet cavity and a second air inlet cavity which are cascaded, a first end of the first air inlet cavity is communicated with the air inlet, a second end of the first air inlet cavity is communicated with a first end of the second air inlet cavity through a first air inlet small hole, and a second end of the second air inlet cavity outputs air to the crystal direction through a second air inlet small hole. In one specific embodiment, the air inlet channel further comprises a third air inlet cavity cascaded with the second air inlet cavity, the first end of the third air inlet cavity is communicated with the second end of the second air inlet cavity through a second air inlet small hole, and the second end of the third air inlet cavity transmits gas to the crystal direction through the third air inlet small hole. In one specific embodiment, the first air inlet cavity, the second air inlet cavity and the third air inlet cavity are hollow annular cylinders, wherein the volume of the first air inlet cavity is smaller than the volume of the second air inlet cavity, the volume of the third air inlet cavity is smaller than the volume of the first air inlet cavity, and the aperture of the first air inlet small hole is smaller than the aperture of the second air inlet small hole. In one specific embodiment, the rear end of the crystal is further provided with an air outlet flow channel, and the air outlet flow channel is communicated with the air outlet. In one specific embodiment, the air outlet flow channel comprises a first air outlet cavity and a second air outlet cavity which are cascaded, wherein a first end of the first air outlet cavity is connected to the rear end of the crystal through a first air outlet small hole, a second end of the first air outlet cavity is communicated with a first end of the second air outlet cavity through a second air outlet small hole, and a second end of the second air outlet cavity is communicated with the air outlet. In one specific embodiment, the first air outlet cavity and the second air outlet cavity are hollow annular cylinders, wherein the volume of the first air outlet cavity is smaller than that of the second air outlet cavity, and the aperture of the first air outlet small hole is smaller than that of the air outlet. In one specific embodiment, the covering length of the heating element along the light path direction is greater than or equal to the sum of the axial length of the air inlet flow channel and the axial length of the crystal. In one embodiment, the gas is at least one inert gas selected from the group consisting of argon, helium, nitrogen, krypton, and xenon, and has a purity of not less than 99.99%. In one embodiment, the light inlet and the light outlet are respect