CN105932529B - Laser with adaptive adjustment laser power - Google Patents
Laser with adaptive adjustment laser power Download PDFInfo
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- CN105932529B CN105932529B CN201610339625.XA CN201610339625A CN105932529B CN 105932529 B CN105932529 B CN 105932529B CN 201610339625 A CN201610339625 A CN 201610339625A CN 105932529 B CN105932529 B CN 105932529B
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- fiber
- laser
- cladded
- refractive index
- transmission
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
Abstract
The present invention discloses a kind of laser with adaptive adjustment laser power, including pump light source, cladded-fiber and transmission fiber, cladded-fiber described in the pump light source profile pump or end pumping, the cladded-fiber further comprises centrally located laser gain medium fibre core, this laser gain medium fibre core is successively coated with separation layer from inside to outside, fluorescent material layer and surrounding layer, the refractive index of laser gain medium fibre core is greater than the refractive index of separation layer, the fluorescent material layer refractive index that the refractive index of separation layer is greater than, fluorescent material layer refractive index is greater than the refractive index of surrounding layer, the input terminal and output end of the cladded-fiber are respectively arranged with the first fiber bragg grating, second fiber bragg grating, and the end face that cladded-fiber is located at pump light source side has a tail mirror, between the cladded-fiber and transmission fiber successively It is provided with the first convex lens, the second convex lens.The present invention greatly promotes punching rate, since the maximum power close to critical value can be used to perforate automatically, it is not necessary to which piercing efficiency is greatly improved in default Safety Redundancy, also reduces the fraction defective of perforation.
Description
Technical field
The present invention relates to a kind of lasers with adaptive adjustment laser power, belong to laser cutting technique field.
Background technique
Existing laser cutting process control method is mainly completed cutting by program desired guiding trajectory, speed, power and added
Work.There are the contradictions of an efficiency and yield in existing laser processing technology, for example perforate, in order to quickly finish perforation,
It is desirable that provide biggish energy input, but the energy of input is excessively high and easily causes in molten bath using high power
The violent gasification of metal material, which sets off an explosion, causes perforation to fail, and generates ejecta pollution eyeglass.Traditional solution is,
Relatively low power is preset in program, and complete perforation with longer time to ensure to penetrate, reserve higher redundancy guarantee and wear
The quality and safety in hole, this mode leave that processing efficiency is low, excessively depend on previous experience and data, and be difficult to accomplish reality
When control, when due to for new product processing, these problems, which seem, more to be protruded.
Summary of the invention
It is an object of the present invention to provide a kind of lasers with adaptive adjustment laser power, and there is adaptive adjustment to swash for this
The laser of optical power greatly promotes punching rate, since the maximum power close to critical value can be used to be worn automatically
Hole, it is not necessary to which piercing efficiency is greatly improved in default Safety Redundancy, also reduces the fraction defective of perforation.
In order to achieve the above objectives, the technical solution adopted by the present invention is that: a kind of swashing with adaptive adjustment laser power
Light device, including pump light source, cladded-fiber and transmission fiber wrap described in the pump light source profile pump or end pumping
Layer optical fiber, the cladded-fiber further comprises centrally located laser gain medium fibre core, this laser gain medium fibre core by
It is successively coated with separation layer, fluorescent material layer and surrounding layer from inside to outside, the refractive index of laser gain medium fibre core is greater than separation layer
Refractive index, the fluorescent material layer refractive index that the refractive index of separation layer is greater than, fluorescent material layer refractive index be greater than surrounding layer folding
Rate is penetrated, the input terminal and output end of the cladded-fiber are respectively arranged with the first fiber bragg grating, the second optical fiber Bragg
Grating, and cladded-fiber be located at pump light source side end face have a tail mirror, between the cladded-fiber and transmission fiber according to
Secondary to be provided with the first convex lens, the second convex lens, the laser gain medium layer is interior doped with Nd3+、Cr3+、Er3+、Yb3+Ion；
A half-reflection and half-transmission chip is provided between the first convex lens, the second convex lens, the half-reflection and half-transmission chip and light
The setting of Lu Chengyi sharp angle, the laser from cladded-fiber pass through half-reflection and half-transmission chip and are transferred to transmission fiber and autobiography in future
It loses fine light to be reflected through half-reflection and half-transmission chip, be disposed with from top to bottom immediately below half-reflection and half-transmission chip low
Pass filter mirror, focus lamp, this focus lamp receive the reflected light from half-reflection and half-transmission chip；One imager is located at focus lamp side,
For receiving the light for carrying out self-focus lens.
Further improved technical solution is as follows in above-mentioned technical proposal:
Preferably, the pump light source is sun optical pumping source, flash lamp pumping source, photoconductive tube pumping source, continuous lamp
Pumping source, semiconductor array laser pumping source or array light-emitting diode pumping source.
Preferably, doped with Cr in the fluorescent material layer3+、Ti3+、Yb3+、Er3+Ion.
Since above-mentioned technical proposal is used, the present invention has following advantages and effect compared with prior art:
1, the present invention has the laser of adaptive adjustment laser power, greatly promotes punching rate, due to can be with
The automatic maximum power using close to critical value is perforated, it is not necessary to and piercing efficiency is greatly improved in default Safety Redundancy,
The fraction defective of perforation is reduced, the on-line monitoring function of high speed reduces rapidly laser power before blast hole can be made to occur, avoids it
Occur, thus can almost to perforate every time and all obtain the effect of stable homogeneous；Secondly, it is when cutting high reflection material,
It can detect that optical maser wavelength is more than given threshold in time, stop avoiding laser backtracking rapidly, and due to being before light
Speed, response time are fast；Again, the input terminal of cladded-fiber and output end are respectively arranged with the first fiber bragg grating,
Two fiber bragg gratings, and the end face that cladded-fiber is located at pump light source side has a tail mirror, will be located in cladded-fiber
Unabsorbed seed light multiple reflections go back, and are conducive to improve light source utilization rate, form high stable laser.
2, the present invention has the laser of adaptive adjustment laser power, improves cutting speed, can try out high power
It is cut, and the fast power redundancy of cutting speed is small, laser energy is fully used；And cutting fraction defective is reduced, it is cutting
It cuts and power is adjusted rapidly according to monitoring result before unsuccessfully occurring, or stop processing, cut again after handling failure, avoided big
Type workpiece causes to scrap because partial cut is bad, cut state analysis, can be right by a large amount of process datas generated to it
Cut state has an accurate quantization judgement, and the cutting technique to improve and developing new provides initial data.
Detailed description of the invention
Attached drawing 1 is the laser structure schematic diagram that the present invention has adaptive adjustment laser power；
Attached drawing 2 is the partial structural diagram of attached drawing 1.
In the figures above: 1, pump light source；2, cladded-fiber；21, laser gain medium fibre core；22, separation layer；23, glimmering
Optical material layer；24, surrounding layer；3, transmission fiber；4, the first fiber bragg grating；5, the second fiber bragg grating；6, tail
Mirror；7, the first convex lens；8, the second convex lens；9, half-reflection and half-transmission chip；10, low-pass filtering mirror；11, focus lamp；12, it is imaged
Device.
Specific embodiment
The present invention will be further described below with reference to examples:
Embodiment 1: a kind of laser with adaptive adjustment laser power, including pump light source 1,2 and of cladded-fiber
Transmission fiber 3, cladded-fiber 2 described in the pump light source profile pump or end pumping, the cladded-fiber 2 is further
Including centrally located laser gain medium fibre core 21, this laser gain medium fibre core 21 is successively coated with separation layer from inside to outside
22, fluorescent material layer 23 and surrounding layer 24, the refractive index of laser gain medium fibre core 21 are greater than the refractive index of separation layer 22, isolation
23 refractive index of fluorescent material layer that the refractive index of layer 22 is greater than, 23 refractive index of fluorescent material layer are greater than the refractive index of surrounding layer 24,
The input terminal and output end of the cladded-fiber 2 are respectively arranged with the first fiber bragg grating 4, the second fiber bragg grating
5, and the end face that cladded-fiber 2 is located at 1 side of pump light source has a tail mirror 6, between the cladded-fiber 2 and transmission fiber 3
It is disposed with the first convex lens 7, the second convex lens 8；
A half-reflection and half-transmission chip 9 is provided between the first convex lens 7, the second convex lens 8, the half-reflection and half-transmission chip 9
It is arranged with optical path in a sharp angle, the laser from cladded-fiber 2 passes through half-reflection and half-transmission chip 9 and is transferred to transmission fiber 3 simultaneously
Light from transmission fiber 3 is reflected through half-reflection and half-transmission chip 9, is located at immediately below half-reflection and half-transmission chip 9 from top to bottom
It is disposed with low-pass filtering mirror 10, focus lamp 11, this focus lamp 11 receives the reflected light from half-reflection and half-transmission chip 9；One at
Picture device 12 is located at 11 side of focus lamp, for receiving the light for carrying out self-focus lens 11.
Above-mentioned pump light source 1 is flash lamp pumping source, doped with Nd in above-mentioned laser gain medium fibre core 213+Ion.
Doped with Yb in above-mentioned laser gain medium fibre core 213+Ion；Doped with Er in above-mentioned fluorescent material layer 233+From
Son.
Embodiment 2: a kind of laser with adaptive adjustment laser power, including pump light source 1,2 and of cladded-fiber
Transmission fiber 3, cladded-fiber 2 described in the pump light source profile pump or end pumping, the cladded-fiber 2 is further
Including centrally located laser gain medium fibre core 21, this laser gain medium fibre core 21 is successively coated with separation layer from inside to outside
22, fluorescent material layer 23 and surrounding layer 24, the refractive index of laser gain medium fibre core 21 are greater than the refractive index of separation layer 22, isolation
23 refractive index of fluorescent material layer that the refractive index of layer 22 is greater than, 23 refractive index of fluorescent material layer are greater than the refractive index of surrounding layer 24,
The input terminal and output end of the cladded-fiber 2 are respectively arranged with the first fiber bragg grating 4, the second fiber bragg grating
5, and the end face that cladded-fiber 2 is located at 1 side of pump light source has a tail mirror 6, between the cladded-fiber 2 and transmission fiber 3
It is disposed with the first convex lens 7, the second convex lens 8；
A half-reflection and half-transmission chip 9 is provided between the first convex lens 7, the second convex lens 8, the half-reflection and half-transmission chip 9
It is arranged with optical path in a sharp angle, the laser from cladded-fiber 2 passes through half-reflection and half-transmission chip 9 and is transferred to transmission fiber 3 simultaneously
Light from transmission fiber 3 is reflected through half-reflection and half-transmission chip 9, is located at immediately below half-reflection and half-transmission chip 9 from top to bottom
It is disposed with low-pass filtering mirror 10, focus lamp 11, this focus lamp 11 receives the reflected light from half-reflection and half-transmission chip 9；One at
Picture device 12 is located at 11 side of focus lamp, for receiving the light for carrying out self-focus lens 11.
Above-mentioned pump light source 1 is semiconductor array laser pumping source, in above-mentioned laser gain medium fibre core 21 doped with
Cr3+Ion；
Doped with Yb in above-mentioned fluorescent material layer 233+Ion.
When using the above-mentioned laser with adaptive adjustment laser power, punching rate is greatly promoted, due to can
To use the maximum power close to critical value to perforate automatically, it is not necessary to piercing efficiency is greatly improved in default Safety Redundancy,
Also the fraction defective of perforation is reduced, the on-line monitoring function of high speed reduces rapidly laser power before blast hole can be made to occur, avoids
It occurs, thus can almost to perforate every time and all obtain the effect of stable homogeneous；Secondly, it is in cutting high reflection material
When, it can detect that optical maser wavelength is more than given threshold in time, stop avoiding laser backtracking rapidly, and due to being before
The light velocity, response time are fast；Again, the input terminal of cladded-fiber and output end be respectively arranged with the first fiber bragg grating,
Second fiber bragg grating, and the end face that cladded-fiber is located at pump light source side has a tail mirror, will be located at cladded-fiber
Interior unabsorbed seed light multiple reflections go back, and are conducive to improve light source utilization rate, form high stable laser；Again, it mentions
High cutting speed can try out high power and be cut, and the fast power redundancy of cutting speed is small, and laser energy obtains abundant benefit
With；And cutting fraction defective is reduced, power is adjusted rapidly according to monitoring result before cutting unsuccessfully occurs, or stop processing, place
It is cut again after reason failure, avoids large-scale workpiece and cause to scrap because partial cut is bad, cut state analysis, by it
The a large amount of process datas generated can have an accurate quantization judgement, to cut state to improve and developing new cutter
Skill provides initial data.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (3)
1. a kind of laser with adaptive adjustment laser power, it is characterised in that: including pump light source (1), cladded-fiber
(2) and transmission fiber (3), cladded-fiber (2) described in the pump light source profile pump or end pumping, the cladding light
Fine (2) further comprise centrally located laser gain medium fibre core (21), this laser gain medium fibre core (21) is from inside to outside
Successively it is coated with separation layer (22), fluorescent material layer (23) and surrounding layer (24), the refractive index of laser gain medium fibre core (21)
Greater than the refractive index of separation layer (22), fluorescent material layer (23) refractive index that the refractive index of separation layer (22) is greater than, fluorescent material
Layer (23) refractive index is greater than the refractive index of surrounding layer (24), and the input terminal and output end of the cladded-fiber (2) are respectively arranged with
First fiber bragg grating (4), the second fiber bragg grating (5), and cladded-fiber (2) is located at pump light source (1) side
End face have a tail mirror (6), be disposed between the cladded-fiber (2) and transmission fiber (3) the first convex lens (7),
Second convex lens (8)；Doped with Nd in the laser gain medium fibre core (21)3+、Cr3+、Er3+、Yb3+Ion；
A half-reflection and half-transmission chip (9), the half-reflection and half-transmission chip are provided between the first convex lens (7), the second convex lens (8)
(9) it is arranged with optical path in a sharp angle, the laser from cladded-fiber (2) passes through half-reflection and half-transmission chip (9) and is transferred to transmission
Optical fiber (3) simultaneously reflects the light from transmission fiber (3) through half-reflection and half-transmission chip (9), is located at half-reflection and half-transmission chip (9)
Underface is disposed with low-pass filtering mirror (10), focus lamp (11) from top to bottom, this focus lamp (11) is received from half anti-half
The refraction light of saturating chip (9)；One imager (12) is located at focus lamp (11) side, for receiving the light for coming self-focus lens (11)
Line.
2. the laser with adaptive adjustment laser power according to claim 1, it is characterised in that: the pump light
Source (1) is sun optical pumping source, flash lamp pumping source, photoconductive tube pumping source, continuous lamp pumping source, semiconductor array laser pump
Pu source or array light-emitting diode pumping source.
3. the laser with adaptive adjustment laser power according to claim 1, it is characterised in that: the phosphor
Doped with Cr in the bed of material (23)3+、Ti3+、Yb3+、Er3+Ion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610339625.XA CN105932529B (en) | 2016-05-20 | 2016-05-20 | Laser with adaptive adjustment laser power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610339625.XA CN105932529B (en) | 2016-05-20 | 2016-05-20 | Laser with adaptive adjustment laser power |
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| CN105932529A CN105932529A (en) | 2016-09-07 |
| CN105932529B true CN105932529B (en) | 2019-01-22 |
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| CN201247902Y (en) * | 2008-07-22 | 2009-05-27 | 福州高意通讯有限公司 | Sum-frequency laser |
| CN101404377B (en) * | 2008-10-31 | 2011-06-01 | 福州高意通讯有限公司 | Optical fiber laser |
| CN103956638B (en) * | 2014-01-17 | 2016-01-06 | 华南理工大学 | A kind of tunable narrow-linewidth single-frequency linearly polarized laser device |
| CN104638507A (en) * | 2015-02-08 | 2015-05-20 | 北京工业大学 | Volume Bragg grating mode selection-based permutation type gain grating self-adapting laser |
| CN204558878U (en) * | 2015-02-08 | 2015-08-12 | 北京工业大学 | A kind of gain grating reciprocity formula self adaptation laser based on Volume Bragg grating |
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Effective date of registration: 20201222 Address after: 061000 No.5, Bohai South planning road, Yunhe District, Cangzhou City, Hebei Province Patentee after: CANGZHOU LEAD LASER TECHNOLOGY Co.,Ltd. Address before: 215308 no.1885, Zhonghua Garden West Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province Patentee before: SUZHOU LEAD LASER TECHNOLOGY Co.,Ltd. |
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