CN109672076A - A kind of big model volume laser of multi-wavelength - Google Patents
A kind of big model volume laser of multi-wavelength Download PDFInfo
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- CN109672076A CN109672076A CN201910056810.1A CN201910056810A CN109672076A CN 109672076 A CN109672076 A CN 109672076A CN 201910056810 A CN201910056810 A CN 201910056810A CN 109672076 A CN109672076 A CN 109672076A
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- laser
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- model volume
- big model
- gain medium
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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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08004—Construction or shape of optical resonators or components thereof incorporating a dispersive element, e.g. a prism for wavelength selection
-
- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08004—Construction or shape of optical resonators or components thereof incorporating a dispersive element, e.g. a prism for wavelength selection
- H01S3/08009—Construction or shape of optical resonators or components thereof incorporating a dispersive element, e.g. a prism for wavelength selection using a diffraction grating
-
- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08059—Constructional details of the reflector, e.g. shape
-
- 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
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08086—Multiple-wavelength emission
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The present invention relates to a kind of big model volume lasers of multi-wavelength, and broad band laser gain media and dispersive optical elements are used in resonant cavity, realize that different resonance wavelengths are separated in laser gain medium upper pathway, and then realize that the big model volume laser of multi-wavelength is total to optical output.Including pumping source, resonant cavity total reflection mirror, resonant cavity output coupling mirror, laser gain medium, dispersive optical elements.Dispersive optical elements realize that different resonance wavelengths are different in laser gain medium upper pathway, and the laser gain medium of wide gain is realized to multiwavelength laser gain, and the mode competition between different optical maser wavelengths is avoided, and realize multiwavelength laser resonance simultaneously.The present invention is a kind of novel laser structure, can reduce the laser power density of laser gain medium, increasing heat radiation area, improve laser output power, and realize that multiwavelength laser is total to the output of optical path high light beam quality.
Description
Technical field
The invention belongs to laser technology and field of lasers, and in particular to a kind of big model volume laser of multi-wavelength.
Background technique
Since the graceful invention laser of nineteen sixty plum, laser technology after decades of development, is being cut by laser, is swashing
It is applied in the numerous areas such as photocoagulation, laser engraving, laser imaging, laser acquisition, is occupied in the national economic development
Increasingly consequence.As the core building block in laser application, people imitate output power, the photoelectricity of laser
Rate, beam quality, output wavelength and stability propose various requirement, are the research hotspot and important development of current laser field
Direction is one of the great direction in " long-term science and technology development planning outline (2006-2020) in country ".
To realize high power laser light output, frequently with large-caliber laser gain media, it is expected that improving laser gain media
Storage energy increases cooling surface area, reduces laser power density to avoid laser gain medium damage, but is able to achieve bloom
The zlasing mode small volume of the stable cavity of beam quality laser output, can cause higher order mode using large-caliber laser gain media
Oscillation reduces laser beam quality.To solve high power and high light beam quality this contradiction, frequently with telescope cavity configuration or non-
Stablize cavity configuration.Telescope cavity configuration can increase the fundamental mode volume in laser resonator, but due to there are laser focus point,
Easily cause air breakdown and optic element damage under high power.Unstable cavity structure can also increase laser in laser resonator
Cross-sectional area in the gain medium, but there is output laser is that annular hollow light beam and laser secondary lobe consume laser main lobe energy
The problem of amount.Therefore, realize that increase laser realizes the output of high light beam quality laser in laser gain medium while model volume
It is current urgent problem.
To solve the above problems, the invention proposes a kind of big model volume lasers of multi-wavelength, using width in resonant cavity
Laser gain medium and dispersive optical elements with gain, dispersive optical elements realize different resonance wavelengths in laser gain medium
Upper pathway is different, and the laser gain medium of wideband gain is realized to multiwavelength laser gain, avoids between different optical maser wavelengths
Mode competition realizes multiwavelength laser resonance simultaneously, increases laser while laser gain medium upper mold volume, holding is closely spread out
The multiwavelength laser of emitter-base bandgap grading limit is total to optical output, and has the advantages that optical element is few, optical path is simple, system is stable.
Summary of the invention
The object of the present invention is to provide a kind of big model volume laser of multi-wavelength, which uses broadband in resonant cavity
The laser gain medium and dispersive optical elements of gain realize that different resonance wavelengths are separated in laser gain medium upper pathway, into
And it realizes the big model volume laser of multi-wavelength and is total to optical output.The laser is compared to telescope lumen type laser and unstable lumen type
Laser can realize high power, high efficiency and the output of high light beam quality laser simultaneously, and optical path is simple, system is stablized.
The present invention relates to a kind of big model volume lasers of multi-wavelength, including resonant cavity total reflection mirror (1), laser gain medium
(2), pumping source (3) and pumping source (4), dispersive optical elements (5), resonant cavity output coupling mirror (6), it is characterised in that resonant cavity
Interior laser gain medium (2) and dispersive optical elements (5) using wideband gain realizes that different resonance wavelengths are situated between in laser gain
Matter (2) upper pathway is separated, and then realizes that the big model volume laser of multi-wavelength is total to optical output.
A kind of above-mentioned big model volume laser of multi-wavelength, it is characterised in that pumping source (3) and pumping source (4) can be including
But it is not limited to continuous pumping source, pulse pump source.
The above-mentioned big model volume laser of a kind of multi-wavelength, it is characterised in that pumping source (3) and pumping source (4) can take packet
Include but be not limited to the pumpings sides such as single end face pump, double-end pumping, profile pump, fiber coupling pumping, angle pumping, mixing pumping
Formula.
A kind of above-mentioned big model volume laser of multi-wavelength, it is characterised in that resonant cavity total reflection mirror (1) is wide range reflecting mirror,
It is greater than 90% in the reflectivity of operation wavelength.
The above-mentioned big model volume laser of a kind of multi-wavelength, it is characterised in that the effect of resonant cavity total reflection mirror (1) is by color
The separated different resonance wavelengths of dispersive optical element (5) return to dispersive optical elements (5) along original optical path.
The above-mentioned big model volume laser of a kind of multi-wavelength, it is characterised in that resonant cavity output coupling mirror (6) is in operation wavelength
Reflectivity be between 5%-99%.
A kind of above-mentioned big model volume laser of multi-wavelength, it is characterised in that the half of the gain curve of laser gain medium (2)
High width is greater than 1 nm.
A kind of above-mentioned big model volume laser of multi-wavelength, it is characterised in that dispersive optical elements (5) can be including but not
It is limited to the dispersive optical elements such as dispersing prism, diffraction grating, balzed grating, volume Bragg grating.
The above-mentioned big model volume laser of a kind of multi-wavelength, it is characterised in that laser gain medium (2), which is realized, swashs multi-wavelength
The gain of light, dispersive optical elements (5) realize that different resonance wavelengths in laser gain medium (2) upper pathway difference, avoid different sharp
Multiwavelength laser resonance simultaneously is realized in mode competition between optical wavelength.
Due to the implementation of above technical scheme, the invention has the following advantages over the prior art:
The present invention in resonant cavity by using broad band laser gain media and dispersive optical elements, and different resonance wavelengths are in laser
Gain media upper pathway separates, while realizing the high light beam quality laser output of high power and nearly diffraction limit, furthermore reduces
The laser power density of laser gain medium increases that heat dissipation area, optical element are few, optical path is simple and reliable.
Detailed description of the invention
Fig. 1 is a kind of big model volume laser structure schematic diagram of multi-wavelength of the present invention, in figure: the total reflection of 1- resonant cavity
Mirror, 2- laser gain medium, 3- pumping source, 4- pumping source, 5- dispersive optical elements, 6- resonant cavity output coupling mirror；
Fig. 2 is a kind of light path schematic diagram of the big model volume laser component resonant laser light wavelength of multi-wavelength of the present invention, in figure:
1- resonant cavity total reflection mirror, 2- laser gain medium, 5- dispersive optical elements, 6- resonant cavity output coupling mirror, 11- wavelengthλ 1Swash
The light path schematic diagram of the intracavitary resonance of light, 12- wavelengthλ 2The light path schematic diagram of the intracavitary resonance of laser, 13- wavelengthλ 3The chamber of laser
The light path schematic diagram of interior resonance, 14- wavelength are respectivelyλ 1、λ 2、λ 3Common optic path schematic diagram of the laser in intracavitary resonance, 15- wavelength
Respectivelyλ 1、λ 2、λ 3Laser is total to the light path schematic diagram of optical path coupling output.
Specific embodiment
The present invention is a kind of big model volume laser of multi-wavelength, and this method in resonant cavity by sufficiently using broad band laser
Gain media and dispersive optical elements, dispersive optical elements realize that different resonance wavelengths are different in laser gain medium upper pathway,
The laser gain medium of wide gain curve is realized to multiwavelength laser gain, realizes that the big model volume laser of multiwavelength laser resonance increases
Benefit.
Fig. 1 is a kind of big model volume laser schematic diagram of multi-wavelength of the present invention, and pumping source 3 and pumping source 4 act on
On laser gain medium 2, laser gain medium 2 generates excited absorption and population inversion, occurs spontaneous radiation phenomenon therewith；?
In spontaneous radiation, the wavelength for emitting photon is at random in the fluorescent line of laser gain medium 2, and the direction for emitting photon is
Random, in thousands of spontaneous radiation photon, there are some wavelengthλ 1Photon, it is transferred to resonant cavity total reflection mirror
On 1, reflects along original optical path into dispersive optical elements 5, resonant cavity output coupling mirror 6 is reached, through resonant cavity output coupling
Mirror 6 reflects, if can return on resonant cavity total reflection mirror 1 along original optical path, a resonant optical path 11 is formed, such as Fig. 2 institute
Show；If gain is greater than loss, wavelengthλ 1Light obtain stimulated radiation light amplification, it is final to realize by repeatedly recycling back and forth
Wavelengthλ 1Laser output.
Fig. 2 is a kind of light path schematic diagram of the big model volume laser component resonant laser light wavelength of multi-wavelength of the present invention,
It is intracavitary in addition to wavelengthλ 1Light formed resonant optical path 11, also have other multiple wavelength luminous energy formed resonant optical path, in Fig. 2
The wavelength of citingλ 2Light formed resonant optical path 12, wavelengthλ 3Light formed resonant optical path 13；Due to the work of dispersive optical elements 5
With, different resonance wavelength (exemplary wavelength in such as figureλ 1、λ 2、λ 3) optical path (exemplary optical path 11,12,13 in such as figure) exist
2 road Shang Shibugong of laser gain medium of 5 one end of dispersive optical elements, therefore avoid wavelengthλ 1、λ 2、λ 3Between mode
Competition, the gain that they are all not much different；Also due to the effect of dispersive optical elements 5, different resonance wavelength is (as schemed
In exemplary wavelengthλ 1、λ 2、λ 3) optical path (exemplary optical path 11,12,13 in such as figure) 5 other end of dispersive optical elements exist
Common resonant optical path 14, final their realizations 15 laser of optical path output altogether.
Embodiment 1
2 meters of sphere curvature radius of the plano-concave spherical mirror that resonant cavity total reflection mirror 1 is customized using Edmund company in the present embodiment,
It is greater than 99.9% in the reflectivity of 1010 ~ 1060 nm of laser wavelength range；Laser gain medium 2 is limited using nine science and technology of Chengdu crystalline substance
The Yb:YAG of company's production, having a size of 30 × 30 × 3 mm3, 1/10th of face type less than optical maser wavelength；Pumping source 3 and pumping
M18-220W fiber coupling module of the source 4 using the long brilliance core in Suzhou photoelectricity technology corporation, Ltd., 915 nm of output wavelength, output
220 W of power；Dispersive optical elements 5 use 1 micron of blaze wavelength of reflective diffraction gratings GR50- of Thorlabs company
1210, screen periods are 1200 scribing line/mm；Resonant cavity output coupling mirror 6 is exported using the laser coupled of Edmund company customization
Plane mirror is 95.0 ± 0.5% in the reflectivity of 1010 ~ 1060 nm of laser wavelength range.
It in summary can be by using broad band laser gain media and dispersive optical elements, while reality in resonant cavity
Existing high power and high light beam quality multiwavelength laser are total to optical output, and the optical element of the system is few, optical path is simple and reliable.
Claims (9)
1. a kind of big model volume laser of multi-wavelength, including resonant cavity total reflection mirror (1), laser gain medium (2), pumping source
(3) and pumping source (4), dispersive optical elements (5), resonant cavity output coupling mirror (6), it is characterised in that broadband is used in resonant cavity
The laser gain medium (2) and dispersive optical elements (5) of gain realize different resonance wavelengths road on laser gain medium (2)
Diameter separates, and then realizes that the big model volume laser of multi-wavelength is total to optical output.
2. the big model volume laser of a kind of multi-wavelength according to claim 1, it is characterised in that pumping source (3) and pumping source
(4) including but not limited to continuous pumping source, pulse pump source be can be.
3. the big model volume laser of a kind of multi-wavelength according to claim 1, it is characterised in that pumping source (3) and pumping source
(4) including but not limited to single end face pump, double-end pumping, profile pump, fiber coupling pumping, angle can be taken to pump, is mixed
Close the pump modes such as pumping.
4. the big model volume laser of a kind of multi-wavelength according to claim 1, it is characterised in that resonant cavity total reflection mirror (1) is
Wide range reflecting mirror is greater than 90% in the reflectivity of operation wavelength.
5. the big model volume laser of a kind of multi-wavelength according to claim 1, it is characterised in that resonant cavity total reflection mirror (1)
Effect is that the separated different resonance wavelengths of dispersive optical elements (5) are returned to dispersive optical elements (5) along original optical path.
6. the big model volume laser of a kind of multi-wavelength according to claim 1, it is characterised in that resonant cavity output coupling mirror (6)
It is between 5%-99% in the reflectivity of operation wavelength.
7. the big model volume laser of a kind of multi-wavelength according to claim 1, it is characterised in that laser gain medium (2)
The halfwidth degree of gain curve is greater than 1 nm.
8. the big model volume laser of a kind of multi-wavelength according to claim 1, it is characterised in that dispersive optical elements (5) can be with
It is including but not limited to dispersive optical elements such as dispersing prism, diffraction grating, balzed grating, volume Bragg grating.
9. -8 a kind of big model volume laser of multi-wavelength according to claim 1, it is characterised in that laser gain medium (2) is real
Now to multiwavelength laser gain, dispersive optical elements (5) realize different resonance wavelengths laser gain medium (2) upper pathway not
Together, the mode competition between different optical maser wavelengths is avoided, realizes multiwavelength laser resonance simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910056810.1A CN109672076A (en) | 2019-01-22 | 2019-01-22 | A kind of big model volume laser of multi-wavelength |
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| CN201910056810.1A CN109672076A (en) | 2019-01-22 | 2019-01-22 | A kind of big model volume laser of multi-wavelength |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165529A (en) * | 2019-06-05 | 2019-08-23 | 四川大学 | Three wave bands of one kind are the same as repetition tunable wave length mid-infrared fiber laser |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291039A (en) * | 2008-06-05 | 2008-10-22 | 北京理工大学 | Wideband adjustable laser in shape of batten |
| CN201298660Y (en) * | 2008-11-14 | 2009-08-26 | 浙江大学 | Monolithic-integrated, mode-hop-free, wavelength-tunable semiconductor laser |
-
2019
- 2019-01-22 CN CN201910056810.1A patent/CN109672076A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101291039A (en) * | 2008-06-05 | 2008-10-22 | 北京理工大学 | Wideband adjustable laser in shape of batten |
| CN201298660Y (en) * | 2008-11-14 | 2009-08-26 | 浙江大学 | Monolithic-integrated, mode-hop-free, wavelength-tunable semiconductor laser |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165529A (en) * | 2019-06-05 | 2019-08-23 | 四川大学 | Three wave bands of one kind are the same as repetition tunable wave length mid-infrared fiber laser |
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