A picosecond laser amplifier

Abstract

The present invention discloses a hundred picosecond laser amplifier, which includes an overall frame, an upper cover plate, and a lower cover plate. An upper cover plate is arranged above the overall frame, and a lower cover plate is arranged below the overall frame. On the left side of the rear end inside the overall frame, there is a 1064nm seed source fixing base. On the right side of the 1064nm seed source fixing base, there is a lens holder one. On the right side of the lens holder one, there is a polarizer fixing system. On the right side of the polarizer fixing system, there is an optical rotator base. On the right side of the optical rotator base, there is a lens holder two. On the right side of the lens holder two, there is a lens holder three. On the right side of the lens holder three, there is a lens holder four. On the right side of the lens holder four, there is a wave plate holder base. On the right side of the wave plate holder base, there is a polarizer holder one. On the right side of the polarizer holder one, there is a reflector base one. The present invention enhances the overall sealing performance of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of laser amplifiers, and particularly to a picosecond laser amplifier. Background Art

[0002] Currently, existing laser beauty devices generally use nanosecond (ns) lasers. However, the beauty effect of nanosecond lasers is not very good. Since the shorter the action time of the laser, the less likely the laser energy absorbed and accumulated in the target tissue is to diffuse to the surrounding tissues, and the energy is maximally confined within the target to be treated, protecting the surrounding normal tissues, thereby enhancing the selectivity of treatment.

[0003] Under the condition of picosecond laser pulse width, achieving high single-pulse energy and high power is a worldwide problem.

[0004] Due to its extremely short pulse width, picosecond laser hardly generates heat loss during the interaction process and has almost no thermal ablation. In the field of laser medicine, the action mechanism of picosecond laser is mainly based on the photo-mechanical (photoacoustic) effect, while beauty lasers and intense pulsed light (IPL) devices with longer pulse periods use the photothermal effect. With shorter picosecond pulses and higher peak powers, picosecond laser can treat pigmented skin diseases with fewer treatment courses and better curative effects, effectively remove tattoos, and improve patient comfort, making it a new beauty tool.

[0005] Currently, there are mainly two technical routes to obtain picosecond pulses: mode-locking technology and short-cavity technology. Mode-locking technology generally uses mode-locking elements to obtain pulses shorter than one nanosecond. The debugging is complex, the stability is poor, the single-pulse energy is low, and the maintenance is inconvenient; short-cavity technology generally uses LD to pump thin-film crystals, the resonant cavity is very short, the beam quality is relatively poor, and the control requirement for the cooling water temperature is high. To achieve high-energy picosecond lasers by these two methods, the cost is expensive.

[0006] Moreover, most of the installation box parts of existing laser amplifier devices are of a split assembly structure, resulting in the fixing method of the laser housing being fixed by screws. The installation on the outer wall will increase the stress on the periphery of the laser base plate, causing the base plate to have slight deformation. This deformation is extremely fatal to the laser, which will cause the laser optical path to deviate. In addition, the vibration generated during the installation process will also affect the laser optical path, resulting in a large difference between the optical path before installation and the optical path after installation and the output optical path being disordered.

[0007] Therefore, a picosecond laser amplifier is proposed to address the above problems. Summary of the Invention

[0008] The object of the present invention is to provide a picosecond laser amplifier, comprising an overall frame, an upper cover plate and a lower cover plate, adopting a modular assembly structure. An upper cover plate is arranged above the overall frame, and a lower cover plate is arranged below the overall frame. On the left side at the rear end inside the overall frame, there is a 1064nm seed source fixing base. On the right side of the 1064nm seed source fixing base, there is a lens holder I. On the right side of the lens holder I, there is a polarizer fixing system. On the right side of the polarizer fixing system, there is a rotator base. On the right side of the rotator base, there is a lens holder II. On the right side of the lens holder II, there is a lens holder III. On the right side of the lens holder III, there is a lens holder IV. On the right side of the lens holder IV, there is a wave plate holder base. On the right side of the wave plate holder base, there is a polarizer holder I. On the right side of the polarizer holder I, there is a mirror base I. At the relative position in front of the mirror base I, there is a mirror base II. On the left side of the mirror base II, there is a first-stage amplifier base. On the left side of the first-stage amplifier base, there is a mirror base III. At the relative position in front of the mirror base III, there is a mirror base IV. On the right side of the mirror base IV, there is a polarizer holder II. On the right side of the polarizer holder II, there is a second-stage amplifier base. On the right side of the second-stage amplifier base, there is a wave plate base. On the right side of the wave plate base, there is a mirror base VI. At the relative position in front of the second-stage amplifier base, there is a third-stage amplifier base. On the left side of the third-stage amplifier base, there is a lens holder VI. On the left side of the lens holder VI, there is a lens holder V. On the left side of the lens holder V, there is a mirror base V.

[0009] Further, the overall frame is composed of a load platform and side plates around it as a whole. Fixing holes for fixing the upper cover plate and the lower cover plate, and grooves for filling sealing strips are respectively arranged on the upper and lower sides of the side plates around. The load platform is divided into upper and lower layers. The upper layer is used to fix the bases of various lenses and optical elements, and an output light port is opened on the side wall of the upper layer. The lower layer of the load platform is used to fix the water circuit and the circuit, and a water circuit output hole and a circuit connection port are opened on its side wall.

[0010] Further, the upper cover plate and the lower cover plate form a closed sealed space with the overall frame. Water circuit and circuit output interfaces are opened below the overall frame. The water circuit and circuit output interfaces are fixed using connectors and terminal blocks, and are sealed using liquid glue to ensure that the entire laser amplifier is in a sealed state.

[0011] Further, 8 fixing holes are opened on both the 1064nm seed source fixing base and the rotator base. Four of them are respectively used to fix the 1064nm seed source and the rotator, and the other four are respectively used to fix the 1064nm seed source fixing base and the rotator base to the overall frame.

[0012] Further, lens holders 1, 2, 3, 4, polarizer holders 1, 2, lens holders 5, and 6 are all provided with lens pressing plates for fixing the lenses to ensure that their positions within the holders do not move.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention adopts an overall mechanical structure design, which greatly enhances the overall stability of the laser amplifier. Moreover, this design uses a modular assembly structure, fixing the respective optical path component structures on different fixed bases, facilitating the adjustment of parameters such as optical path height when replacing different devices. Additionally, except for the power supply port, water-cooling output port, signal port, and optical output port, the laser amplifier as a whole has no output ports communicating with the outside world, enhancing the overall sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is a schematic internal structure diagram of the overall framework of the present invention;

[0015] FIG. 2 is a schematic structural diagram of the present invention.

[0016] The reference numerals and names in the figures are as follows:

[0017] 1, overall framework; 2, 1064nm seed source fixed base; 3, lens holder 1; 4, polarizer fixing system; 5, rotator base; 6, lens holder 2; 7, lens holder 3; 8, lens holder 4; 9, wave plate holder base; 10, polarizer holder 1; 11, mirror base 1; 12, mirror base 2; 13, first-stage amplifier base; 14, mirror base 3; 15, mirror base 4; 16, polarizer holder 2; 17, second-stage amplifier base; 18, wave plate base; 19, mirror base 6; 20, mirror base 5; 21, lens holder 5; 22, lens holder 6; 23, third-stage amplifier base; 24, upper cover plate; 25, lower cover plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] As shown in the atta Figure 1 chment 2As shown in the figure, a picosecond laser amplifier provided by the present invention includes an overall frame 1, an upper cover plate 24, and a lower cover plate 25, and adopts a modular assembly structure. An upper cover plate 24 is arranged above the overall frame 1, and a lower cover plate 25 is arranged below the overall frame 1. On the left side of the rear end inside the overall frame 1, there is a 1064nm seed source fixing base 2. On the right side of the 1064nm seed source fixing base 2, there is a lens holder 1 3. On the right side of the lens holder 1 3, there is a polarizer fixing system 4. On the right side of the polarizer fixing system 4, there is a rotator base 5. On the right side of the rotator base 5, there is a lens holder 2 6. On the right side of the lens holder 2 6, there is a lens holder 3 7. On the right side of the lens holder 3 7, there is a lens holder 4 8. On the right side of the lens holder 4 8, there is a wave plate holder base 9. On the right side of the wave plate holder base 9, there is a polarizer holder 1 10. On the right side of the polarizer holder 1 10, there is a mirror base 1 11. At the relative position in front of the mirror base 1 11, there is a mirror base 2 12. On the left side of the mirror base 2 12, there is a first-stage amplifier base 13. On the left side of the first-stage amplifier base 13, there is a mirror base 3 14. At the relative position in front of the mirror base 3 14, there is a mirror base 4 15. On the right side of the mirror base 4 15, there is a polarizer holder 2 16. On the right side of the polarizer holder 2 16, there is a second-stage amplifier base 17. On the right side of the second-stage amplifier base 17, there is a wave plate base 18. On the right side of the wave plate base 18, there is a mirror base 6 19. At the relative position in front of the second-stage amplifier base 17, there is a third-stage amplifier base 23. On the left side of the third-stage amplifier base 23, there is a lens holder 6 22. On the left side of the lens holder 6 22, there is a lens holder 5 21. On the left side of the lens holder 5 21, there is a mirror base 5 20.

[0019] Specifically, the overall frame 1 is composed of a carrier platform and side plates around it as a whole. Fixing holes for fixing the upper cover plate 24 and the lower cover plate 25, as well as grooves for filling sealing strips, are respectively opened on the upper and lower sides of the side plates around. The carrier platform is divided into upper and lower layers. The upper layer is used to fix the bases of various lenses and optical elements, and an output light port is opened on the side wall of the upper layer. The lower layer of the carrier platform is used to fix the water circuit and the circuit, and a water circuit output hole and a circuit connection port are opened on its side wall.

[0020] Specifically, the upper cover plate 24 and the lower cover plate 25 form a closed sealed space with the overall frame 1. Water circuit and circuit output interfaces are opened below the overall frame 1. Connecting pieces and terminal blocks are used to fix the water circuit and circuit output interfaces, and liquid glue is used to seal them to ensure that the entire laser amplifier is in a sealed state.

[0021] Specifically, eight fixing holes are provided on both the 1064nm seed source fixing base 2 and the optical rotator base 5. Four of them are respectively used to fix the 1064nm seed source and the optical rotator, and the other four are respectively used to fix the 1064nm seed source fixing base 2 and the optical rotator base 5 to the overall frame 1.

[0022] Specifically, lens holders 1, 2, 3, 4, polarizer holders 1, 2, 5, 6 are each provided with a lens pressing plate for fixing the lens to ensure that its position within the lens holder does not move.

[0023] Working principle: The overall frame 1 is divided into upper and lower parts, with a loading platform in the middle for placing the bases and optical path components of each optical path. Moreover, on the upper and lower outer walls of the overall frame 1, there are respectively provided slots for fixing the sealing strips and screw holes for fixing the upper cover plate 24 and the lower cover plate 25. On the outer wall of the upper layer of the loading platform, there are holes for fixing the output optical window mirror. On the lower part of the loading platform, there are respectively provided water pipe fixing holes and terminal fixing holes for cooling and power supply of the laser amplifier. Fix each base structure at its corresponding position on the loading platform, and then use lens pressing plates to fix the lenses to lens holders 1, 2, 3, 4, 5, 6 respectively to ensure that the lenses do not move; install the upper cover plate 24 from top to bottom and the lower cover plate 25 from bottom to top, corresponding to the fixing holes on the outer wall of the overall frame to ensure the tightness of the space.

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention. In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A picosecond laser amplifier, comprising an overall frame (1), an upper cover plate (24), and a lower cover plate (25), characterized in that: Adopting a modular assembly structure, an upper cover plate (24) is arranged above the overall frame (1), a lower cover plate (25) is arranged below the overall frame (1), a 1064nm seed source fixing base (2) is arranged on the left side at the rear end inside the overall frame (1), a lens holder one (3) is arranged on the right side of the 1064nm seed source fixing base (2), a polarizer fixing system (4) is arranged on the right side of the lens holder one (3), a rotator base (5) is arranged on the right side of the polarizer fixing system (4), a lens holder two (6) is arranged on the right side of the rotator base (5), a lens holder three (7) is arranged on the right side of the lens holder two (6), a lens holder four (8) is arranged on the right side of the lens holder three (7), a wave plate holder base (9) is arranged on the right side of the lens holder four (8), a polarizer holder one (10) is arranged on the right side of the wave plate holder base (9), a mirror base one (11) is arranged on the right side of the polarizer holder one (10), a mirror base two (12) is arranged at the relative position in front of the mirror base one (11), a first-stage amplifier base (13) is arranged on the left side of the mirror base two (12), a mirror base three (14) is arranged on the left side of the first-stage amplifier base (13), a mirror base four (15) is arranged at the relative position in front of the mirror base three (14), a polarizer holder two (16) is arranged on the right side of the mirror base four (15), a second-stage amplifier base (17) is arranged on the right side of the polarizer holder two (16), a wave plate base (18) is arranged on the right side of the second-stage amplifier base (17), a mirror base six (19) is arranged on the right side of the wave plate base (18), a third-stage amplifier base (23) is arranged at the relative position in front of the second-stage amplifier base (17), a lens holder six (22) is arranged on the left side of the third-stage amplifier base (23), a lens holder five (21) is arranged on the left side of the lens holder six (22), a mirror base five (20) is arranged on the left side of the lens holder five (21), and the overall frame (1) is composed of a loading platform and side plates on all sides to form an integral whole. The loading platform is divided into upper and lower layers. The upper layer is used to fix the bases of various lenses and optical elements, and an output light port is opened on the side wall of the upper layer. The lower layer of the loading platform is used to fix the water circuit and the circuit, and a water circuit output hole and a circuit connection port are opened on its side wall.

2. The picosecond laser amplifier according to claim 1, wherein: Fixing holes for fixing the upper cover plate (24) and the lower cover plate (25), and grooves for filling sealing strips are respectively opened on the upper and lower sides of the side plates on all sides.

3. A picosecond laser amplifier according to claim 1, characterized in that: The upper cover plate (24) and the lower cover plate (25) form a closed sealed space with the overall frame (1). Water circuit and circuit output interfaces are opened below the overall frame (1). The water circuit and circuit output interfaces are fixed using connectors and terminal blocks, and are sealed using liquid glue to ensure that the entire laser amplifier is in a sealed state.

4. A picosecond laser amplifier according to claim 1, characterized in that: Both the 1064nm seed source fixed base (2) and the optical rotator base (5) are provided with 8 fixing holes. Four of them are respectively used to fix the 1064nm seed source and the optical rotator, and the other four are respectively used to fix the 1064nm seed source fixed base (2) and the optical rotator base (5) to the overall frame (1).

5. A picosecond laser amplifier according to claim 1, characterized in that: Lens holders one (3), lens holders two (6), lens holders three (7), lens holders four (8), polarizer holders one (10), polarizer holders two (16), lens holders five (21), and lens holders six (22) are all provided with lens pressing plates for fixing the lenses to ensure that their positions within the holders do not move.

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