CN203491503U

CN203491503U - Nd:YAG laser

Info

Publication number: CN203491503U
Application number: CN201320463648.3U
Authority: CN
Inventors: 尹锋
Original assignee: WUHAN GN LASER EQUIPMENT MANUFACTURING Co Ltd
Current assignee: WUHAN GN LASER EQUIPMENT MANUFACTURING Co Ltd
Priority date: 2013-07-31
Filing date: 2013-07-31
Publication date: 2014-03-19
Anticipated expiration: 2023-07-31

Abstract

The utility model discloses an Nd:YAG laser, which comprises a laser cutting head, a beam expander, a half-reflection output mirror, a laser generating assembly, a total-reflection mirror and a laser optical bench. The half-reflection output mirror and the total-reflection mirror are respectively positioned on the two sides of the laser generating assembly. The beam expander and the laser cutting head are sequentially arranged on the output optical path of the half-reflection output mirror. The laser generating assembly arranged on the laser optical bench is at least composed of two xenon lamps, a YAG crystal and a condensation cavity. The YAG crystal is arranged in the condensing cavity along the axial direction. The two xenon lamps are arranged in the condensing cavity and are respectively positioned on the two sides of the YAG crystal. According to the technical scheme of the utility model, the structure of the Nd:YAG laser is optimized and integrated, so that the heat dissipation problem due to the increased power is solved. Therefore, the output power of the Nd:YAG laser is ensured to be stable and high, and the cost is saved. Meanwhile, the cutting capability is improved.

Description

A kind of Nd:YAG laser

Technical field

The utility model relates to a kind of solid state laser, relates in particular to a kind of Nd:YAG laser.

Background technology

Nd:YAG laser is to take a kind of solid state laser that YAG crystal is matrix, and YAG is the abbreviation of yttrium-aluminium-garnet, and chemical formula is Y ₃al ₅o ₁₂, in YAG crystal substrate, mix active ions Nd ³⁺just become Nd:YAG, Nd:YAG laser has that cutting material is indeformable, cutting speed is fast and precision advantages of higher, as a kind of advanced person's processing technology, is adopted more and more by metal processing industry.But the defects such as power output is not high enough, poor stability that current Nd:YAG laser also exists, cause cutting thicker material, cutting power is limited, in order to stablize output high-power, these lasers have structurally been done a lot of improvement, although the structure after improvement has improved power, complex structure, fails to solve the heat dissipation problem after the increase of output power, and cost is high, it is high that system accuracy is required, and is unfavorable for actual production enforcement.

Utility model content

The purpose of this utility model is the problem of mentioning in above-mentioned background technology in order to solve, a kind of Nd:YAG solid state laser is provided, this solid state laser adopts all solid state light path components and parts, Stability Analysis of Structures, and structure is optimized to integration, and solved the heat dissipation problem after the increase of output power, can stablize output high-power, save cost, improved cutting power.

To achieve these goals, the technical solution of the utility model is as follows:

A kind of Nd:YAG laser, comprise laser cutting head, beam expanding lens, half reverse pumping appearance, laser generation component, total reflective mirror and laser optical bench, described half reverse pumping appearance and described total reflective mirror lay respectively at the both sides of described laser generation component, described beam expanding lens and described laser cutting head are arranged on the output light path of described half reverse pumping appearance successively, described laser generation component is arranged on described laser optical bench, described laser generation component is at least by two xenon lamps, one YAG crystal and a laser pump cavity form, described YAG crystal is arranged in described laser pump cavity and arranges along axis direction, two described xenon lamps are arranged in described laser pump cavity and lay respectively at the both sides of described YAG crystal.

Preferably, the length of described YAG crystal is 195mm.Longer crystal, the area that can make to be positioned at two xenon flash lamp pumping YAG crystal of YAG crystal both sides becomes large, makes more laser working medium enter into the state exciting.

Further, described laser pump cavity two ends are provided with light hole, and described light hole is coaxial with described YAG crystal.

Further, described laser is connected with Laser Power Devices and refrigeration constant temperature system.

Further, two described xenon lamps are all connected with described Laser Power Devices.

Further, described laser pump cavity below is provided with water inlet and delivery port.

Further, described water inlet is connected with described refrigeration constant temperature system respectively with delivery port.

Compared with prior art, the beneficial effects of the utility model are as follows:

1, the utility model adopts all solid state light path components and parts, Stability Analysis of Structures, and structure is optimized to integration, adopt the Nd:YAG solid state laser of single crystal, two xenon lamp, single laser pump cavity, it can stablize output high-power, and the laser cutting machine that makes to be equipped with this solid state laser has cutting speed faster, higher cutting thickness, better cuts end face and better cut quality.

2, the utility model is increased to 195mm by the length of YAG crystal, longer crystal, the area that can make to be positioned at two xenon flash lamp pumping YAG crystal of YAG crystal both sides becomes large, make more laser working medium enter into the state exciting, light after stimulated radiation after peak value vibration by half reverse pumping appearance output laser, the laser that output can be processed.

3, the utility model is provided with refrigeration constant temperature system, by changing refrigerating capacity and the discharge size of refrigeration constant temperature system, has solved the thermal effect phenomenon of laser when the increase of output power.

4, in the utility model, the YAG crystal in laser pump cavity and two xenon lamps are coupled by cooling water, and the water of high pressure and high flow capacity can be taken away the heat energy of the unnecessary xenon lamp luminous energy generation not absorbed by laser working medium, ensure in laser pump cavity and can stablize pumping, maintain laser pump cavity interior in lower isoperibol, because energy accumulating cannot discharge, do not cause device failure.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the structural representation of the utility model Nd:YAG laser;

Fig. 2 is the explosive view of laser pump cavity in the utility model;

Fig. 3 is the overall structure figure of laser pump cavity in the utility model;

Reference numeral: 1-beam expanding lens, 2-beam expanding lens adjustment rack, 3-half reverse pumping appearance, 4-half reverse pumping appearance adjustment rack, 5-laser pump cavity, 6-total reflective mirror, 7-total reflective mirror adjustment rack, 8-ruddiness indicating device, 9-ruddiness adjustment rack, 10-laser optical bench, 11-laser outer cover, 12-laser head outer cover, 13-laser cutting head, the 14-laser pump cavity seat of honour, 15-xenon lamp holder, 16-xenon lamp, 17-YAG crystal, 18-light hole, lower of 19-laser pump cavity, 20-base plate, 21-xenon lamp electrode, 22-water inlet, 23-delivery port.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.

In conjunction with a kind of Nd:YAG laser shown in Fig. 1, comprise laser cutting head 13, beam expanding lens 1, half reverse pumping appearance 3, laser generation component, total reflective mirror 6 and laser optical bench 10, half reverse pumping appearance 3 and total reflective mirror 6 lay respectively at the both sides of laser generation component, beam expanding lens 1 and laser cutting head 13 are arranged on the output light path of half reverse pumping appearance 3 successively, laser generation component is arranged on laser optical bench 10, laser generation component is at least by two xenon lamps 16, one YAG crystal 17 and a laser pump cavity 5 form, YAG crystal 17 is arranged in laser pump cavity 5 and arranges along axis direction, two xenon lamps 16 are arranged in laser pump cavity 5 and lay respectively at the both sides of YAG crystal 17.

The utility model is increased to 195mm by the length of YAG crystal 17, longer crystal, the area that can make to be positioned at two xenon lamps, the 16 LD pumped YAG crystal 17 of YAG crystal 17 both sides becomes large, make more laser working medium enter into the state exciting, light after stimulated radiation after peak value vibration by half reverse pumping appearance 3 output lasers, the laser energy that stable power output is 850W.Whole laser production process is below described:

First, input 380V power supply is to Laser Power Devices charged layer, Laser Power Devices adopt the two xenon lamp power supplies of 18KW, two xenon lamps 16 are all connected with Laser Power Devices, Laser Power Devices charge, energy accumulation, then by two discharge layers, two xenon lamps 16 are carried out to discharge excitation, after xenon lamp 16 is excited, be lit release luminous energy, the luminous energy of two xenon lamp 16 generations carries out profile pump excitation to YAG crystal 17 in the airtight cavity space with gold-plated high reflection being formed by laser pump cavity 5, absorb after xenon lamp 16 energy, in YAG crystal 17, in metastable working media particle, by low-lying level, transit to high level, at high level, stop after a particle life cycle, by high level, turn back to low-lying level, discharge laser, laser pump cavity 5 two ends are reserved with light hole 18, this light hole 18 is coaxial with YAG crystal 17, interior the produced laser of laser pump cavity 5 is selected, only output and the coaxial concentric laser beam of YAG crystal 17.

Be excited and select after laser beam in the optical resonator being formed by total reflective mirror 6 and half reverse pumping appearance 3, vibrate back and forth, energy is constantly energized increase, when energy increases to the selectional restriction of half reverse pumping appearance 3, just exporting moulding wavelength is the YAG laser of 1064nm.

The laser of output through one group of front eyeglass and after the beam expanding lens 1 that forms of eyeglass, first disperse, rear focusing, make laser beam after beam expanding lens 1 close to directional light, reduced the angle of divergence of laser, thereby improved the collimate in parallel degree of light, laser is not dispersed when transmission is more remote, power is unattenuated, can carry out long-distance communications with ensuring the quality of products, simultaneously, have compared with the laser of small divergence angle and be more conducive to transmission, thereby the energy of the laser beam of assurance arrival material surface is unattenuated, thereby ensure good cutting effect.

In the utility model, laser is connected with refrigeration constant temperature system, laser pump cavity 5 belows are provided with water inlet 22 and delivery port 23, water inlet 22 is connected with refrigeration constant temperature system respectively with delivery port 23, form Inlet and outlet water passage, cooling water carries out circulating cooling by this Inlet and outlet water passage to two xenon lamps 16 in laser pump cavity 5 and YAG crystal 17, cooling water heats up along with absorbing the heat that dump energy transforms after xenon lamp 16 pumpings, in this refrigeration constant temperature system, be provided with compression refrigeration and heating, when water temperature is during lower than 25 degrees Celsius, heat intensification, when water temperature is during higher than 25 degrees Celsius, carry out refrigeration cool-down, make water temperature remain at 25 degrees Celsius of the optimum temperatures of YAG laser.The cooling water that refrigeration constant temperature system adopts is distilled water or pure water, and free from admixture in water, in order to avoid the work of the impurity effect laser components and parts in water.

Ruddiness indicating device 8 and ruddiness adjustment rack 9 are the reference lights that set before regulating for all solid state optical component in laser, because YAG swashs light wavelength, be 1064nm, it in spectrum, is invisible light, in adjusting laser during each device, take ruddiness as benchmark, ensured when regulating, had one with reference to luminous point, the position of each optical component and angle have been adjusted.

The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any modification of doing, be equal to replacement etc., within all should being included in protection range of the present utility model.

Claims

1. a Nd:YAG laser, it is characterized in that, comprise laser cutting head, beam expanding lens, half reverse pumping appearance, laser generation component, total reflective mirror and laser optical bench, described half reverse pumping appearance and described total reflective mirror lay respectively at the both sides of described laser generation component, described beam expanding lens and described laser cutting head are arranged on the output light path of described half reverse pumping appearance successively, described laser generation component is arranged on described laser optical bench, described laser generation component is at least by two xenon lamps, one YAG crystal and a laser pump cavity form, described YAG crystal is arranged in described laser pump cavity and arranges along axis direction, two described xenon lamps are arranged in described laser pump cavity and lay respectively at the both sides of described YAG crystal.

2. Nd:YAG laser according to claim 1, is characterized in that, the length of described YAG crystal is 195mm.

3. Nd:YAG laser according to claim 1, is characterized in that, described laser pump cavity two ends are provided with light hole, and described light hole is coaxial with described YAG crystal.

4. Nd:YAG laser according to claim 1, is characterized in that, described laser is connected with Laser Power Devices and refrigeration constant temperature system.

5. Nd:YAG laser according to claim 4, is characterized in that, two described xenon lamps are all connected with described Laser Power Devices.

6. Nd:YAG laser according to claim 4, is characterized in that, described laser pump cavity below is provided with water inlet and delivery port.

7. Nd:YAG laser according to claim 6, is characterized in that, described water inlet is connected with described refrigeration constant temperature system respectively with delivery port.