CN109950782A - A kind of optionally narrow spectra part end pumping slab laser device of wavelength - Google Patents
A kind of optionally narrow spectra part end pumping slab laser device of wavelength Download PDFInfo
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- CN109950782A CN109950782A CN201910251158.9A CN201910251158A CN109950782A CN 109950782 A CN109950782 A CN 109950782A CN 201910251158 A CN201910251158 A CN 201910251158A CN 109950782 A CN109950782 A CN 109950782A
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Abstract
The present invention relates to a kind of optionally narrow spectra part end pumping slab laser devices of wavelength, it successively include: laser diode (1) along laser emitting direction, coupled system (2), it inputs mirror (3), slab crystal (4) and outgoing mirror (5), the outgoing mirror (5) successively include: the first piano convex cylindrical lens (51) and reflective volume Bragg grating (52) along laser emitting direction.Laser aid of the present invention is capable of providing high power, high light beam quality, narrow spectrum and output wavelength selectable laser output, and can replace realizing that narrow spectrum, output wavelength is optional, optical fiber laser of high light beam quality based on fiber grating.
Description
Technical field
The present invention relates to a kind of laser device, in particular to the optionally narrow spectra part end pumping lath of a kind of wavelength
Laser device.
Background technique
High power, high light beam quality, narrow spectral laser device laser radar, laser ranging, laser remote sensing, laser medicine,
The fields such as spectroscopy, optical frequency standarad and nonlinear optics have a wide range of applications.But high power is obtained while narrowing spectrum
With the laser of high light beam quality, there is very big difficulty.For Tm-doped crystal, emission spectrum is wider, very
Can realize that laser exports in big spectral region, this to laser take into account spectral width narrow, output wavelength selection, high power and
High light beam quality will increase bigger difficulty.
The method of common acquisition narrow-linewidth laser have annular cell method, intracavitary insertion FP Method of Etalon, bulk of optical feedback modulation,
Injection locking, traveling wave amplification etc., wherein annular cell method is that it is empty to eliminate space burning in intracavitary insertion isolator or equivalent isolator
Effect to realize the effect for narrowing spectrum, but to realize that wavelength selection also needs to further increase component, and is realized big
Power operating is more difficult.Intracavitary insertion FP Method of Etalon can not only narrow spectral width, moreover it is possible to by tuning FP etalon inclination angle,
Realize the selection of output wavelength, but when pump power increases, spectral width easily broadens, and multi-wavelength output easily occurs.Injection
In locking scheme, it is necessary first to which a small-power, spectrum are relatively narrow, output wavelength can realize the preferable seed of selection, beam quality
Seed laser is injected into slave laser device by laser, and carries out feedback control to from laser, will be from the defeated of laser
Out in wavelength control to seed laser wavelength, to obtain high power, spectrum is narrowed and exported with the laser of wavelength selection；Traveling wave
Magnification scheme is similar with injection locking scheme, and it is amplifier rather than oscillator that difference, which is from laser, and without master in amplifier
Dynamic control section.Injection locking and traveling wave amplify two schemes, the spectral width of laser, output wavelength, beam quality, output
Power is influenced by seed laser and from laser (amplifier) simultaneously, and device is complicated.Above scheme theoretically all may be used
To realize that single longitudinal mode operates.In addition to this, it changes a hysteroscope of laser resonant cavity into grating, can equally narrow output and swash
The spectral width of light.Such method is widely used in semiconductor laser, solid state laser, in optical fiber laser.High-power
In laser, due to pump power height, control resonant cavity fundamental transverse mode operating realizes that the output of high light beam quality laser is one and chooses
War.
In addition, proposing a kind of laser diode portion end surface lath hybrid resonant cavity laser in the prior art
It (Innoslab), is a kind of laser for obtaining high power and high beam quality, principle is laser diode transmitting
The shaped system of pump light is shaped to rectangular light spot and is completely filled with crystal on slab crystal length direction, in a thickness direction only
Only middle section is full of crystal, in combination with hybrid resonant chamber, that is, in the width direction of crystal is unsteady cavity, in crystal
It is steady chamber on thickness direction, is utilized respectively respective advantage, obtains high power, high efficiency, the laser of high light beam quality.
However, itself shortcoming of Innoslab laser, is that the spectral width of output laser can not be narrowed, it can not
Select the output wavelength of laser.
Summary of the invention
For the defect for overcoming the above-mentioned prior art, the present invention provides a kind of optionally narrow spectra part end pumping plate of wavelength
Laser device, successively includes: laser diode along laser emitting direction, and coupled system inputs mirror, slab crystal and output
Mirror, it is characterised in that: the outgoing mirror successively includes: the first piano convex cylindrical lens and reflective body Bradley along laser emitting direction
Lattice grating.
Further, first piano convex cylindrical lens and the reflective volume Bragg grating are against setting.
Further, the coupled system along laser emitting direction successively include: the first coupled lens group, rectangular waveguide and
Second coupled lens group.
Further, the first coupled lens group along laser emitting direction successively include: the second piano convex cylindrical lens and
4th piano convex cylindrical lens.
Further, the second coupled lens group successively includes: the 5th piano convex cylindrical lens, along laser emitting direction
Six piano convex cylindrical lens and spherical lens.
Further, the pump light that the laser diode is launched is shaped to a rectangle by the coupled system
Hot spot is injected into the center of slab crystal.
Further, the rectangular light spot is full of crystal on the direction X-Z, and in the direction Y-Z, only centre is full of.
Further, the slab crystal upper and lower surface by indium be welded on red copper it is heat sink on, pass through circulating water.
Further, the input mirror is plano-concave cylindrical mirror, and off-axis confocal non-in X-Z plane composition with the outgoing mirror
Steady chamber forms steady chamber in Y-Z plane.
Further, whole eyeglasses in the coupled system are coated with the anti-reflection film to pump light in light pass surface；
It is coated with the anti-reflection film to pump light in two light pass surfaces of the input mirror, and is coated in concave surface to laser
High-reflecting film；
The anti-reflection film to pump light and laser is coated in two light pass surfaces of the slab crystal；
It is coated in two light pass surfaces of first piano convex cylindrical lens to laser anti-reflection film, the reflective body Bradley
Lattice grating is coated with the anti-reflection film to laser.
The beneficial effects of the present invention are: it is exported in conjunction with traditional Innoslab laser high power, high light beam quality laser
Advantage and body Prague light have the advantage for narrowing laser spectrum width and wavelength selection, it is anti-using an equivalent lens and one
The output end mirror in formula volume Bragg grating substitution tradition Innoslab laser resonant cavity is penetrated, tradition is being retained
Using the advantage of volume Bragg grating press polish spectral width and wavelength selection while the advantage of Innoslab laser, one is provided
Kind high power, high light beam quality, narrow spectrum and the selectable laser of output wavelength can replace realizing narrow light based on fiber grating
It composes, output wavelength is optional, high light beam quality optical fiber laser.
Detailed description of the invention
Fig. 1 (a), (b) are respectively the X-Z plane of the narrow spectra part end pumping slab laser of the present invention, Y-Z plane
Structural schematic diagram.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation,
It is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Referring to Fig. 1 (a), (b), X-Z plane, the Y-Z of narrow spectra part end pumping slab laser respectively of the invention
The structural schematic diagram of plane.Along laser emitting direction by this direction definition be Z-direction successively include: laser diode 1, coupling
System 2 inputs mirror 3, slab crystal 4 and outgoing mirror 5, wherein the outgoing mirror 5 successively includes: first flat along laser emitting direction
Convex cylindrical lens 51 and reflective volume Bragg grating 52.Preferably, first piano convex cylindrical lens 51 and the reflection
Formula volume Bragg grating 52 is against setting.
The coupled system 2 successively includes: that the first coupled lens group, rectangular waveguide 23 and the second coupling are saturating along Z-direction
Microscope group.The first coupled lens group successively includes: the second piano convex cylindrical lens 21 and the 4th piano convex cylindrical lens along Z-direction
22.The second coupled lens group successively includes: the 5th piano convex cylindrical lens 24, the 6th piano convex cylindrical lens 25 along Z-direction
With spherical lens 26.
The pump light that the laser diode 1 is launched is shaped to the hot spot note an of rectangle by the coupled system 2
Enter to the center of slab crystal 4.The rectangular light spot is full of crystal on the direction X-Z, and in the direction Y-Z, only centre is full of.It is described
4 upper and lower surface of slab crystal by indium be welded on red copper it is heat sink on, pass through circulating water.
Preferably, the input mirror 3 is plano-concave cylindrical mirror, and off-axis confocal non-in X-Z plane composition with the outgoing mirror 5
Steady chamber forms steady chamber in Y-Z plane due to the thermal lensing effect of crystal.
To improve laser whole efficiency, it is further preferred that in light pass surface by whole eyeglasses in coupled system 2
It is coated with the anti-reflection film to pump light.The anti-reflection film being coated in two light pass surfaces of mirror 3 to pump light is inputted, and is plated in concave surface
There is the high-reflecting film to laser.The anti-reflection film to pump light and laser is coated in 4 two light pass surfaces of slab crystal.In outgoing mirror 5
51 two light pass surfaces of piano convex cylindrical lens on be coated with to laser anti-reflection film, reflective volume Bragg grating 52 is coated with to laser
Anti-reflection film.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (10)
1. a kind of optionally narrow spectra part end pumping slab laser device of wavelength, successively includes: along laser emitting direction
Laser diode (1), coupled system (2) input mirror (3), slab crystal (4) and outgoing mirror (5), it is characterised in that: described defeated
Appearance (5) successively includes: the first piano convex cylindrical lens (51) and reflective volume Bragg grating (52) along laser emitting direction.
2. laser device according to claim 1, it is characterised in that: first piano convex cylindrical lens (51) with it is described
Reflective volume Bragg grating (52) is against setting.
3. laser device according to claim 1 to 2, it is characterised in that: the coupled system (2) goes out along laser
Penetrating direction successively includes: the first coupled lens group, rectangular waveguide (23) and the second coupled lens group.
4. laser device according to claim 3, it is characterised in that: the first coupled lens group is along laser emitting side
To successively including: the second piano convex cylindrical lens (21) and the 4th piano convex cylindrical lens (22).
5. laser device according to claim 4, it is characterised in that: the second coupled lens group is along laser emitting side
To successively including: the 5th piano convex cylindrical lens (24), the 6th piano convex cylindrical lens (25) and spherical lens (26).
6. -5 any laser device according to claim 1, it is characterised in that: the laser diode (1) is launched
Pump light be injected into the centers of slab crystal (4) by the hot spot that the coupled system (2) are shaped to a rectangle.
7. laser device according to claim 6, it is characterised in that: the rectangular light spot is full of plate on the direction X-Z
Crystal (4) is full of the direction Y-Z is only intermediate.
8. laser device according to claim 7, it is characterised in that: slab crystal (4) upper and lower surface passes through indium
Be welded on red copper it is heat sink on, pass through circulating water.
9. -8 any laser device according to claim 1, it is characterised in that: the input mirror (3) is plano-concave cylinder
Mirror, and off-axis confocal unstable resonator is constituted in X-Z plane with the outgoing mirror (5), steady chamber is formed in Y-Z plane.
10. laser device according to claim 9, it is characterised in that: whole eyeglasses in the coupled system (2) exist
The anti-reflection film to pump light is coated in light pass surface；
It is coated with the anti-reflection film to pump light in two light pass surfaces of input mirror (3), and is coated in concave surface to laser
High-reflecting film；
The anti-reflection film to pump light and laser is coated in (4) two light pass surfaces of the slab crystal；
It is coated in two light pass surfaces of first piano convex cylindrical lens (51) to laser anti-reflection film, the reflective body Bradley
Two light pass surfaces of lattice grating (52) are coated with the anti-reflection film to laser.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910251158.9A CN109950782A (en) | 2019-03-29 | 2019-03-29 | A kind of optionally narrow spectra part end pumping slab laser device of wavelength |
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| CN201910251158.9A CN109950782A (en) | 2019-03-29 | 2019-03-29 | A kind of optionally narrow spectra part end pumping slab laser device of wavelength |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112448254A (en) * | 2020-11-12 | 2021-03-05 | 中国航空工业集团公司洛阳电光设备研究所 | Bragg body grating coupled output double-rod tandem laser |
| CN112505711A (en) * | 2020-11-24 | 2021-03-16 | 中国科学院光电技术研究所 | Device for performing laser radar spectrum filtering by using reflective volume Bragg grating |
| CN117096709A (en) * | 2023-10-17 | 2023-11-21 | 北京盛镭科技有限公司 | Ultrashort pulse laser amplifying device and method |
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| US7672346B1 (en) * | 2005-10-26 | 2010-03-02 | University Of Central Florida Research Foundation, Inc. | Narrow spectral width lasers optimized and temperature stabilized with volume Bragg grating mirrors |
| CN202059045U (en) * | 2011-04-28 | 2011-11-30 | 山东大学 | High-power ultraviolet laser |
| CN103701018A (en) * | 2013-12-13 | 2014-04-02 | 南京大学 | Partial end surface pumping mixing chamber slab optical parametric oscillator |
| CN105119135A (en) * | 2015-06-25 | 2015-12-02 | 中国科学院西安光学精密机械研究所 | Thulium-doped optical fiber laser with narrow linewidth of 1.75 micrometers |
-
2019
- 2019-03-29 CN CN201910251158.9A patent/CN109950782A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7672346B1 (en) * | 2005-10-26 | 2010-03-02 | University Of Central Florida Research Foundation, Inc. | Narrow spectral width lasers optimized and temperature stabilized with volume Bragg grating mirrors |
| CN202059045U (en) * | 2011-04-28 | 2011-11-30 | 山东大学 | High-power ultraviolet laser |
| CN103701018A (en) * | 2013-12-13 | 2014-04-02 | 南京大学 | Partial end surface pumping mixing chamber slab optical parametric oscillator |
| CN105119135A (en) * | 2015-06-25 | 2015-12-02 | 中国科学院西安光学精密机械研究所 | Thulium-doped optical fiber laser with narrow linewidth of 1.75 micrometers |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112448254A (en) * | 2020-11-12 | 2021-03-05 | 中国航空工业集团公司洛阳电光设备研究所 | Bragg body grating coupled output double-rod tandem laser |
| CN112505711A (en) * | 2020-11-24 | 2021-03-16 | 中国科学院光电技术研究所 | Device for performing laser radar spectrum filtering by using reflective volume Bragg grating |
| CN112505711B (en) * | 2020-11-24 | 2023-03-31 | 中国科学院光电技术研究所 | Device for performing laser radar spectrum filtering by using reflective volume Bragg grating |
| CN117096709A (en) * | 2023-10-17 | 2023-11-21 | 北京盛镭科技有限公司 | Ultrashort pulse laser amplifying device and method |
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Application publication date: 20190628 |