CN202997295U - Laser with distribution of light field intensity adjustable - Google Patents
Laser with distribution of light field intensity adjustable Download PDFInfo
- Publication number
- CN202997295U CN202997295U CN 201220718831 CN201220718831U CN202997295U CN 202997295 U CN202997295 U CN 202997295U CN 201220718831 CN201220718831 CN 201220718831 CN 201220718831 U CN201220718831 U CN 201220718831U CN 202997295 U CN202997295 U CN 202997295U
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- laser
- distribution
- light intensity
- modulate
- distributes
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Abstract
The utility model discloses a laser with the distribution of light field intensity adjustable, comprising a laser seed resource, a beam expansion system, a digital micromirror device and a digital light processing circuit module, wherein the emission end of the laser seed source is arranged opposite to the incidence end of the beam expansion system, the emission end of the beam expansion system is arranged opposite to the reflector of the digital micromirror device, and the digital micromirror device is electrically connected with the digital light processing circuit module. The laser with the distribution of light field intensity adjustable employs the digital micromirror device and the digital light processing circuit module to adjust the light field intensity, can increase the laser power through a gain medium, and is simple in structure and convenient in control operation.
Description
Technical field
The utility model relates to field of lasers, specifically a kind of distribution of light intensity laser that distributes and can 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.
The utility model content
The technical problems to be solved in the utility model is to provide 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.
The technical solution of the utility model 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 to 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 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 described in the utility model, 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 utility model:
(1), the utility model is by each micro mirror on digital light processing circuit module control figure micro mirror element, control according to actual needs the reflection angle of each micro mirror, realize the optical switch action, the modulation of realization 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 utility model 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 utility model 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 utility model 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 utility model embodiment.
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 to digital light processing circuit module 4, 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 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 utility model:
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 and Digital Micromirror Device 3 reflecting surface couplings, 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 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 gain media constantly is pumped into upper energy level, thereby make the light intensity of laser beam be amplified, laser beam after 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 the first number of micro mirror 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 to 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 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 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 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 |
|---|---|---|---|
| CN 201220718831 CN202997295U (en) | 2012-12-24 | 2012-12-24 | Laser with distribution of light field intensity adjustable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220718831 CN202997295U (en) | 2012-12-24 | 2012-12-24 | Laser with distribution of light field intensity adjustable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202997295U true CN202997295U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220718831 Expired - Lifetime CN202997295U (en) | 2012-12-24 | 2012-12-24 | Laser with distribution of light field intensity adjustable |
Country Status (1)
| Country | Link |
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| CN (1) | CN202997295U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022878A (en) * | 2012-12-24 | 2013-04-03 | 合肥知常光电科技有限公司 | Laser adjustable in light field intensity distribution |
-
2012
- 2012-12-24 CN CN 201220718831 patent/CN202997295U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103022878A (en) * | 2012-12-24 | 2013-04-03 | 合肥知常光电科技有限公司 | Laser adjustable in light field intensity distribution |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |