CN211879769U

CN211879769U - Power secondary amplification structure of picosecond laser amplification cavity

Info

Publication number: CN211879769U
Application number: CN202020364313.6U
Authority: CN
Inventors: 牛岗; 毛柘
Original assignee: Jiangsu Ruitong Laser Technology Co ltd
Current assignee: Jiangsu Ruitong Laser Technology Co ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-11-06
Anticipated expiration: 2030-03-20

Abstract

The utility model discloses a picosecond laser amplification cavity power secondary amplification structure, which comprises a pre-amplification cavity and an amplification cavity, wherein the light of the pre-amplification cavity sequentially passes through a first amplification end and a second amplification end, a first 45-degree reflector in the first amplification end is arranged at a light outlet of the pre-amplification cavity, a lens, a laser crystal and a first 0-degree reflector are sequentially arranged along the light reflection path of the first 45-degree reflector, a second 0-degree reflector is arranged on the light reflection path of the first 0-degree reflector, a second 45-degree reflector is arranged along the light reflection path of the second 0-degree reflector, a third 45-degree reflector is arranged along the light reflection path of the second 45-degree reflector, the reflected light of the third 45-degree reflector is output to the second amplification end, the problem that the current picosecond laser amplification cavity space is limited is solved, in the first amplification structure, the laser only vibrates and amplifies through a primary crystal, so that the power for amplifying the laser is limited, and the like.

Description

Power secondary amplification structure of picosecond laser amplification cavity

Technical Field

The utility model relates to the field of laser technology, especially, relate to a picosecond laser amplification cavity power secondary amplification structure.

Background

Laser, one of the most important technological inventions of human in the 20 th century, has developed over the years, and has directly pushed the development of a group of emerging subjects and high and new technologies, while picosecond (pulse width 10-12 seconds) pulse laser technology, one of the leading technologies of laser technology, has shown a rather broad application prospect in many aspects. Picosecond laser precision machining has two main characteristics. One is "cold working". Conventional laser machining (including nanosecond lasers) tends to melt the raw materials for machining metal, glass, etc. by heating. Picoseconds (1 picosecond is equal to 1000 femtoseconds) and the local high temperature generated by the femtosecond laser can reach 6000 ℃, the temperature is higher than that of the surface of the sun, and the surface of the acted material is directly vaporized before generating heat diffusion. Secondly, "hyperfine". The ultrafast laser can be focused to an ultrafine space region, has extremely high peak power and extremely short laser pulse, and has the advantages of regular section, no microcrack, no material damage and no melting region during processing.

The light cabin cavity of picosecond laser includes seed chamber, regeneration chamber and amplification chamber etc. and current picosecond laser is because the amplification chamber space is limited, and inside adopts the structure that the two-stage was enlargied mostly, and among the first order amplification structure, laser only vibrates through a crystal and enlargies for the power to laser amplification is limited scheduling problem.

SUMMERY OF THE UTILITY MODEL

Because it is limited to enlarge the chamber space in order to solve current picosecond laser instrument, the inside structure that the two-stage was enlargied that adopts mostly, wherein first order enlarge in the structure, laser only vibrates through a crystal and enlargies for the power to laser amplification is limited scheduling problem, the utility model discloses a picosecond laser instrument enlarges chamber power secondary and enlarges the structure.

The utility model adopts the following technical scheme:

the utility model discloses a power secondary amplification structure of picosecond laser amplification cavity, which comprises a pre-amplification cavity and an amplification cavity, wherein the amplification cavity comprises a first-stage amplification end and a second-stage amplification end, light in the pre-amplification cavity sequentially passes through the first-stage amplification end and the second-stage amplification end from a light outlet, the first-stage amplification end comprises a first 45-degree reflector, the first 45-degree reflector is arranged at the light outlet of the pre-amplification cavity, a lens, a laser crystal and a first 0-degree reflector are sequentially arranged along the light reflection path of the first 45-degree reflector, a second 0-degree reflector is arranged on the light reflection path of the first 0-degree reflector, the second 0-degree reflector is positioned in front of the lens, a second 45-degree reflector is arranged along the light reflection path of the second 0-degree reflector, a third 45-degree reflector is arranged along the light reflection path of the second 45-degree reflector, and the reflected light of the third 45-degree reflector is output to the second-stage amplification end.

Furthermore, two end faces of the laser crystal are perpendicular to the optical axis, so that laser can be transmitted on the same laser axis.

Further, the mirror surfaces of the first 45 ° mirror, the second 45 ° mirror, and the third 45 ° mirror are arranged parallel to each other.

Further, the mirror surfaces of the first 0 ° mirror and the second 0 ° mirror are arranged parallel to each other.

Has the advantages that: the utility model adopts the above structure, can make laser ray from putting the chamber output in advance, light is through first 45 speculum reflection to lens, focus on through lens, in carrying laser crystal, vibrate through laser crystal's the first time and enlarge, transmit to first 0 speculum, light is through first 0 speculum reflection, get into laser crystal once more, it vibrates and enlarges to carry out the second time, realize that the secondary of power is enlargied, laser ray after enlargiing passes lens, transmit to second 0 speculum, through second 0 speculum reflection to second 45 speculum, rethread second 45 speculum reflection to third 45 speculum, by third 45 speculum at last, reflect to the second level amplification end in.

The utility model discloses, in original cavity structures, change the mounted position of speculum, can make light pass through laser crystal twice, accomplish twice and vibrate and enlarge, realize that laser power's secondary is enlargied, compact structure, area is little, and the power amplification effect is obvious.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 shows the light transmission frame of the present invention.

In the figure: 1-a pre-amplification cavity, 2-an amplification cavity, 21-a first-stage amplification end and 22-a second-stage amplification end;

211-first 45 ° mirror, 212-lens, 213-laser crystal, 214-first 0 ° mirror, 215-second 0 ° mirror, 216-second 45 ° mirror, 217-third 45 ° mirror 217.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1 and fig. 2: a power secondary amplification structure of an amplification cavity of a picosecond laser comprises a pre-amplification cavity 1 and an amplification cavity 2, wherein the amplification cavity 2 comprises a first-stage amplification end 21 and a second-stage amplification end 22, light in the pre-amplification cavity 1 sequentially passes through the first-stage amplification end 21 and the second-stage amplification end 22 from a light outlet, the first-stage amplification end 21 comprises a first 45-degree reflector 211, the first 45-degree reflector 211 is arranged at the light outlet of the pre-amplification cavity 1, a lens 212, a laser crystal 213 and a first 0-degree reflector 214 are sequentially arranged along the light reflection path of the first 45-degree reflector 211, a second 0-degree reflector 215 is arranged on the light reflection path of the first 0-degree reflector 214, the second 0-degree reflector 215 is positioned in front of the lens 212, a second 45-degree reflector 216 is arranged along the light reflection path of the second 0-degree reflector 215, a third 45-degree reflector 217 is arranged along the light reflection path of the second 45-degree reflector 216, the reflected light from the third 45 ° mirror 217 is output to the second-stage amplification end 22.

Wherein, two end faces of the laser crystal 213 are perpendicular to the optical axis, so that the laser can be transmitted on the same laser axis.

The mirror surfaces of the first 45 ° mirror 211, the second 45 ° mirror 215, and the third 45 ° mirror 217 are arranged parallel to each other, and the mirror surfaces of the first 0 ° mirror 214 and the second 0 ° mirror 215 are arranged parallel to each other.

The utility model adopts the above structure, can make laser ray from putting 1 output in advance, light reflects to lens 212 through first 45 speculum 211, focus through lens 212, in carrying laser crystal 213, vibrate through laser crystal 213 for the first time and enlarge, transmit to first 0 speculum 214, light reflects through first 0 speculum 214, reentrant laser crystal 213, carry out the vibration of the second time and enlarge, realize that the secondary of power is enlargied, laser ray after enlargiing passes lens 212, transmit to second 0 speculum 215, reflect to second 45 speculum 216 through second 0 speculum 215, rethread second 45 speculum 216 reflects to third 45 speculum 217, by third 45 speculum 217 at last, reflect to second grade amplification end 22.

The utility model discloses, in original cavity structures, change the mounted position of speculum, can make light pass through laser crystal twice, accomplish twice and vibrate and enlarge, realize that laser power's secondary is enlargied, compact structure, area is little, and the power amplification effect is obvious

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a picosecond laser amplification cavity power secondary amplification structure, includes the cavity of putting in advance and the cavity of amplifying, including first order amplification end and second level amplification end in the amplification cavity, light loops through by the light-emitting window in the cavity of putting in advance first order amplification end and second level amplification end, its characterized in that: including first 45 speculum in the first order amplification end, first 45 speculum is located cavity light-emitting port department of putting in advance is followed the light reflection path of first 45 speculum is equipped with lens, laser crystal and first 0 speculum in proper order be equipped with 0 speculum of second on the light reflection path of first 0 speculum, just 0 speculum of second is located the place ahead of lens is followed the light reflection path of 0 speculum of second is equipped with 45 speculums of second, follows the light reflection path of 45 speculums of second is equipped with 45 speculums of third, the reflection light of 45 speculums of third exports to second level amplification end.

2. The picosecond laser amplification cavity power secondary amplification structure of claim 1, wherein: two end faces of the laser crystal are perpendicular to the optical axis.

3. The picosecond laser amplification cavity power secondary amplification structure of claim 1, wherein: the mirror surfaces of the first 45-degree reflecting mirror, the second 45-degree reflecting mirror and the third 45-degree reflecting mirror are arranged in parallel.

4. The picosecond laser amplification cavity power secondary amplification structure of claim 1, wherein: the mirror surfaces of the first 0 degree reflecting mirror and the second 0 degree reflecting mirror are arranged in parallel with each other.