CN103022878A - Laser adjustable in light field intensity distribution - Google Patents
Laser adjustable in light field intensity distribution Download PDFInfo
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- CN103022878A CN103022878A CN2012105650030A CN201210565003A CN103022878A CN 103022878 A CN103022878 A CN 103022878A CN 2012105650030 A CN2012105650030 A CN 2012105650030A CN 201210565003 A CN201210565003 A CN 201210565003A CN 103022878 A CN103022878 A CN 103022878A
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Abstract
The invention discloses a laser adjustable in light field intensity distribution. The laser comprises a laser seed source, a beam expanding system, a digital micromirror device and a digital light processing circuit module. An emergence end of the laser seed source is arranged corresponding to an incidence end of the beam expanding system, and an emergence end of the beam expanding system is arranged corresponding to a reflector of the digital micromirror device which is electrically connected with the digital light processing circuit module. The digital micromirror device and the digital light processing circuit module are adopted for adjustment of light field intensity, light efficiency is improved through gain media, and the laser adjustable in light field intensity distribution is simple in structure and convenient in control and operation.
Description
Technical field
The present invention relates to field of lasers, specifically a kind of distribution of light intensity laser that distributes and to modulate.
Background technology
The distributed modulation of traditional laser beam light intensity is to adopt the spatial light modulation device directly the laser beam of laser output to be modulated, and the shortcoming of this method is the restriction that is subject to spatial light modulation device damage threshold, and modulated laser power can not be too high.
Summary of the invention
The technical problem to be solved in the present invention provides the laser that a kind of distribution of light intensity distributes and can modulate, and adopts Digital Micromirror Device to carry out spatial modulation to the distribution of light intensity of high-power laser beam.
Technical scheme of the present invention is:
The laser that a kind of distribution of light intensity distributes and can modulate, include laser seed source, beam-expanding system, Digital Micromirror Device and digital light processing circuit module, the incident end of the relative beam-expanding system of exit end in described laser seed source arranges, the speculum setting of the relative Digital Micromirror Device of exit end of described beam-expanding system, described Digital Micromirror Device is electrically connected with the digital light processing circuit module.
The laser that described distribution of light intensity distribution can be modulated also includes gain media and pump light source, the reflection output of the relative Digital Micromirror Device speculum of the plane of incidence of described gain media arranges, and the exit end relative gain medium of described pump light source arranges.
Be provided with optical isolator between the reflection output of described Digital Micromirror Device speculum and the plane of incidence of gain media.
Continuous wave laser is selected in described laser seed source.
Ytterbium-doping optical fiber laser or Nd:YAG solid state laser are selected in described laser seed source.
Described beam-expanding system is comprised of two confocal convex lens and the diaphragm that is arranged at two the confocal point of confocal convex lens places.
All be coated with the transmission film consistent with the laser beam wavelength of laser seed source output on the described gain media plane of incidence and the exit facet.
Described pump light source is selected lamp pump laser or semiconductor pump laser; The pump mode of pump light source is coaxial pumping or side pumping.
Digital micro-mirror device mirror of the present invention, its reflecting surface is to be gathered on the CMOS silicon chip by 50 ~ 1,300,000 micromirror, and each micromirror is an optical switch, and switching time is less than 20 μ s, the size of each micromirror is in micron dimension, for example 14 μ m * 14 μ m.
Advantage of the present invention:
(1), the present invention is by each micro mirror on the digital light processing circuit module control figure micro mirror element, control according to actual needs the reflection angle of each micro mirror, the action of realization optical switch realize the modulation to the spatial light intensity distribution of Output of laser light beam, and each switch motion only needs 20 μ s;
(2), gain media of the present invention is subject to the pumping of pump beam, can carry out to the laser beam of incident light intensity and amplify, thereby make the luminous power of laser beam obtain to improve;
(3), optical isolator of the present invention not only can guarantee seeing through of incident light, and can prevent that the laser that reflects from shining on the reflecting surface of DMD device by optical isolator, thereby damage DMD device.
The present invention adopts Digital Micromirror Device and digital light processing circuit module to adjust distribution of light intensity, by gain media luminous power is improved, and it is simple in structure, control operation is convenient.
Description of drawings
Fig. 1 is the structural representation in the specific embodiment of the invention.
Embodiment
See Fig. 1, the laser that a kind of distribution of light intensity distributes and can modulate, include laser seed source 1, beam-expanding system 2, Digital Micromirror Device 3, digital light processing circuit module 4, optical isolator 7, gain media 5 and pump light source 6, the incident end of the relative beam-expanding system 2 of the exit end in laser seed source 1 arranges, the speculum setting of the relative Digital Micromirror Device 3 of the exit end of beam-expanding system 2, the incident end of the relative optical isolator 7 of reflection output of Digital Micromirror Device 3 arranges, the plane of incidence setting of the exit end relative gain medium 5 of optical isolator 7, Digital Micromirror Device 3 is electrically connected with digital light processing circuit module 4, and the exit end relative gain medium 6 of pump light source 6 arranges; Wherein, continuous wave laser is selected in laser seed source 1, for example: ytterbium-doping optical fiber laser or Nd:YAG solid state laser; Beam-expanding system 2 is comprised of two confocal convex lens and the diaphragm that is arranged at two the confocal point of confocal convex lens places; All be coated with the transmission film consistent with the laser beam wavelength of laser seed source output on gain media 5 planes of incidence and the exit facet; Pump light source 6 is selected lamp pump laser or semiconductor pump laser, and the pump mode of pump light source is coaxial pumping or side pumping.
Use principle of the present invention:
The collimated laser beam vertical incidence of laser seed source 1 output enters beam-expanding system 2, beam-expanding system 2 is adjusted to light beam with Digital Micromirror Device 3 reflectings surface and is mated, digital light treatment circuit 4 control figure micro mirror elements 3, the laser beam that incides on Digital Micromirror Device 3 speculums is carried out the spatial light intensity modulation, adjusted laser beam after the light intensity through the mirror reflects of Digital Micromirror Device 3, then pass through optical isolator 7, project the plane of incidence of gain media 5, gain media 5 is subject to the pumping of the pump arteries and veins light of profile pump light source 6 emissions, particle in the gain media constantly is pumped into upper energy level, thereby so that the light intensity of laser beam obtains amplifying, the laser beam after the amplification is by the exit facet output of gain media.
Embodiment:
The employing wavelength is 1064nm, power output is 100mW, single mode semiconductor laser is as seed laser, the output beam diameter is 3mm, beam-expanding system is comprised of two confocal convex lens, the focal length of lens is respectively 100mm and 250mm, beam diameter can be enlarged into 7.5mm, Digital Micromirror Device adopts DLP 0.3 WVGA series 220 DMD of Texas Instrument, its reflecting surface is of a size of 0.3 inch, and micro mirror unit number is 608 * 684, and gain media is the Nd:YAG crystal, be of a size of 10*10*50mm, it is the 980nm semiconductor laser of 20W that pumping source adopts luminous power.This laser can obtain the laser that space that power output is 10W to the maximum can be modulated.
Claims (8)
1. the distribution of light intensity laser that distributes and to modulate, include laser seed source and beam-expanding system, the incident end of the relative beam-expanding system of exit end in described laser seed source arranges, it is characterized in that: the laser that described distribution of light intensity distribution can be modulated also includes Digital Micromirror Device and digital light processing circuit module, the speculum setting of the relative Digital Micromirror Device of exit end of described beam-expanding system, described Digital Micromirror Device is electrically connected with the digital light processing circuit module.
2. a kind of distribution of light intensity according to claim 1 laser that distributes and to modulate, it is characterized in that: the laser that described distribution of light intensity distribution can be modulated also includes gain media and pump light source, the reflection output of the relative Digital Micromirror Device speculum of the plane of incidence of described gain media arranges, and the exit end relative gain medium of described pump light source arranges.
3. a kind of distribution of light intensity according to claim 1 laser that distributes and can modulate is characterized in that: be provided with optical isolator between the reflection output of described Digital Micromirror Device speculum and the plane of incidence of gain media.
4. a kind of distribution of light intensity according to claim 1 laser that distributes and can modulate, it is characterized in that: continuous wave laser is selected in described laser seed source.
5. a kind of distribution of light intensity according to claim 4 laser that distributes and can modulate, it is characterized in that: ytterbium-doping optical fiber laser or Nd:YAG solid state laser are selected in described laser seed source.
6. a kind of distribution of light intensity according to claim 1 laser that distributes and can modulate is characterized in that: described beam-expanding system is comprised of two confocal convex lens and the diaphragm that is arranged at two the confocal point of confocal convex lens places.
7. a kind of distribution of light intensity according to claim 2 laser that distributes and can modulate is characterized in that: all be coated with the transmission film consistent with the laser beam wavelength of laser seed source output on the described gain media plane of incidence and the exit facet.
8. a kind of distribution of light intensity according to claim 2 laser that distributes and can modulate, it is characterized in that: described pump light source is selected lamp pump laser or semiconductor pump laser; The pump mode of pump light source is coaxial pumping or side pumping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105650030A CN103022878A (en) | 2012-12-24 | 2012-12-24 | Laser adjustable in light field intensity distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105650030A CN103022878A (en) | 2012-12-24 | 2012-12-24 | Laser adjustable in light field intensity distribution |
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| CN103022878A true CN103022878A (en) | 2013-04-03 |
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| CN2012105650030A Pending CN103022878A (en) | 2012-12-24 | 2012-12-24 | Laser adjustable in light field intensity distribution |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111050038A (en) * | 2019-11-07 | 2020-04-21 | 中国科学院西安光学精密机械研究所 | A reflective spatial encoding high-resolution light field imaging device and method |
| CN111736356A (en) * | 2020-07-17 | 2020-10-02 | 西安交通大学 | A variable multi-beam MOPA laser output system and method based on optical field control |
| CN111822850A (en) * | 2020-07-17 | 2020-10-27 | 西安交通大学 | A multi-beam laser amplification scanning processing system and method based on optical field control |
| CN112186487A (en) * | 2020-09-27 | 2021-01-05 | 西安交通大学 | Flexible multi-beam laser processing head based on light field regulation and control and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020018496A1 (en) * | 1998-09-14 | 2002-02-14 | Interscience, Inc. | Tunable diode laser system, apparatus and method |
| US7058098B1 (en) * | 2005-11-29 | 2006-06-06 | The United States Of America As Represented By The Secretary Of The Air Force | Self-synchronous locking of optical coherence by single-detector electronic-frequency tagging |
| CN1858650A (en) * | 2006-06-07 | 2006-11-08 | 哈尔滨工业大学 | Polar coordinate directly writing-in method and device based on micro optical array multiple spot exposure |
| CN101809494A (en) * | 2007-10-01 | 2010-08-18 | 松下电器产业株式会社 | Wavelength conversion laser device and image display device using the same |
| CN202997295U (en) * | 2012-12-24 | 2013-06-12 | 合肥知常光电科技有限公司 | Laser with distribution of light field intensity adjustable |
-
2012
- 2012-12-24 CN CN2012105650030A patent/CN103022878A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020018496A1 (en) * | 1998-09-14 | 2002-02-14 | Interscience, Inc. | Tunable diode laser system, apparatus and method |
| US7058098B1 (en) * | 2005-11-29 | 2006-06-06 | The United States Of America As Represented By The Secretary Of The Air Force | Self-synchronous locking of optical coherence by single-detector electronic-frequency tagging |
| CN1858650A (en) * | 2006-06-07 | 2006-11-08 | 哈尔滨工业大学 | Polar coordinate directly writing-in method and device based on micro optical array multiple spot exposure |
| CN101809494A (en) * | 2007-10-01 | 2010-08-18 | 松下电器产业株式会社 | Wavelength conversion laser device and image display device using the same |
| CN202997295U (en) * | 2012-12-24 | 2013-06-12 | 合肥知常光电科技有限公司 | Laser with distribution of light field intensity adjustable |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111050038A (en) * | 2019-11-07 | 2020-04-21 | 中国科学院西安光学精密机械研究所 | A reflective spatial encoding high-resolution light field imaging device and method |
| CN111736356A (en) * | 2020-07-17 | 2020-10-02 | 西安交通大学 | A variable multi-beam MOPA laser output system and method based on optical field control |
| CN111822850A (en) * | 2020-07-17 | 2020-10-27 | 西安交通大学 | A multi-beam laser amplification scanning processing system and method based on optical field control |
| CN112186487A (en) * | 2020-09-27 | 2021-01-05 | 西安交通大学 | Flexible multi-beam laser processing head based on light field regulation and control and using method thereof |
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Application publication date: 20130403 |