CN106785895A - A kind of device that beam is closed based on photon crystal laser - Google Patents
A kind of device that beam is closed based on photon crystal laser Download PDFInfo
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- CN106785895A CN106785895A CN201611079549.XA CN201611079549A CN106785895A CN 106785895 A CN106785895 A CN 106785895A CN 201611079549 A CN201611079549 A CN 201611079549A CN 106785895 A CN106785895 A CN 106785895A
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- laser
- photon crystal
- bar
- crystal laser
- short bar
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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
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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
The invention discloses a kind of device that beam is closed based on photon crystal laser, the device includes shell；Ladder is heat sink, and for placing the short bar bar of photonic laser, the laser of the short bar bar outgoing of photonic laser of different shoulder heights is by after speculum, it is possible to achieve the superposition of quick shaft direction hot spot；Spherical lens, for compressing fast and slow axis directional divergence angle simultaneously；Speculum, for changing laser propagation direction；Coupling mirror is focused on, for the light beam coupling of (quick shaft direction superposition) after sharp combiner to be entered into optical fiber；The present invention reduces quantity and shell volume using lens, cost of manufacture is reduced, and lens are debug easily, the more compact structure of device, it is easier to it is coupled into small core optical fibers.The device can also realize the coupling output of hectowatt magnitude by simple extension.
Description
Technical field
The invention belongs to the application field that laser closes beam, specifically design and a kind of beam to be closed based on photon crystal laser
Device.
Background technology
Succeeded in developing from the first ruby laser sixties in 19th century, semiconductor laser is used as laser of new generation
Device, is obtained with advantages such as its small volume, the high, long lifespans of electro-optical efficiency in fields such as industrial processes, medical treatment, military affairs, national defence
Extensive use.But because the limitation of self structure, the angle of divergence of its speed direction of principal axis differ greatly, entire light is of poor quality.With
The continuous improvement of industrial processes and high power fiber laser pumping source demand, high power, high brightness and high light beam quality
Semiconductor laser has become research topic popular in the world.Sharp combiner is to realize high power, high brightness and bloom
One of effective ways of beam quality.Swash combiner technology to have been obtained in Laser Processing and high-power optical-fiber coupling product widely
Using.
At present, can realize that the laser for closing beam has：Single-tube laser, bar bar laser and repeatedly battle array laser.
Single-tube laser power output is relatively low with respect to bar bar laser, is needed when developing high power laser fiber coupling module
More unit component is wanted, whole complex manufacturing technology is higher to beam collimation and pointing accuracy requirement.Traditional bar bar laser
Slow axis beam is second-rate, and " smile " effect phenomenon substantially, with optical system is costly relatively low with coupling efficiency lacks
Point.Traditional conjunction Shu Fangfa typically can only in one direction realize the superposition of hot spot, it is impossible to the core diameter of effective filling optical fiber,
Cause the utilization ratio of core diameter not high.In the patent of invention of Application No. 201410766549.1, inventor is using a series of
Laser beam displacement optical system adjusts light beam, realizes many laser beams of two-dimensional circular arrangement；In Application No.
In the patent of invention of 201510662366.X, there is provided a kind of new many single-tube semiconductor laser fiber coupling modules, make originally
The one-dimensional quick shaft direction of single tube semiconductor laser stacking, be changed into quick shaft direction and be superimposed jointly with slow-axis direction, purpose is all uncommon
Hope the clear aperature space and raising fiber coupling power output that can effectively utilize coupling mirror.Both approaches are to a certain extent
The complexity of optical system is both increased, along with the resetting difficulty and more expensive cost of manufacture of whole module.
The content of the invention
The present invention is proposed to solve an at least problem of the prior art.Showing hereinafter with reference to embodiment of the invention
Example will be described in greater detail, but the invention is not limited in the embodiment.
Wood invention proposes a kind of device that beam is closed based on photon crystal laser, including ladder is heat sink, photonic crystal swashs
The short bar bar of light device, spherical lens, speculum and focusing coupling mirror；
Embodiments in accordance with the present invention, the ladder is heat sink to be made up of the step of different height, and one is placed on each step
The individual short bar bar of the photon crystal laser；
Embodiments in accordance with the present invention, the laser of each short bar bar transmitting of photon crystal laser is through the sphere
Outgoing parallel laser after lens compression；
Embodiments in accordance with the present invention, one speculum of the short bar bar correspondence of each photon crystal laser, by described
Speculum realizes that the light path of the short bar bar outgoing beam of photon crystal laser turns back to incide the focusing coupling mirror；
Embodiments in accordance with the present invention, the focusing coupling mirror is used to focus on the light beam after sharp combiner；
Embodiments in accordance with the present invention, the step number that the ladder is heat sink is not less than 2；
Embodiments in accordance with the present invention, the front facet of the short bar bar of photon crystal laser takes the anti-reflection film process of plating；
Embodiments in accordance with the present invention, the short bar bar of photon crystal laser contains multiple luminescence units；
Embodiments in accordance with the present invention, the quantity and spacing of the luminescence unit on the short bar bar of photon crystal laser with
Numbers of steps that ladder is heat sink and spacing difference are equal, and the hot spot distribution before the focusing coupling mirror can be realized in low coverage side
Shape；
Embodiments in accordance with the present invention, the hot spot of the short bar bar output of photon crystal laser is subcircular hot spot；
Embodiments in accordance with the present invention, the reflecting surface of the speculum is coated with and the short bar bar of the photon crystal laser
The corresponding high-reflecting film of excitation wavelength；
Embodiments in accordance with the present invention, the speculum to the heat sink distance of the ladder be to maintain it is constant, and with institute
State the heat sink placement of ladder angle be also to maintain it is constant；
Embodiments in accordance with the present invention, the device also includes optical fiber, and the optical fiber is used to transmit by the focusing coupling mirror
Laser after focusing；
Embodiments in accordance with the present invention, the device also includes shell, and the shell is heat sink, described for accommodating the ladder
The short bar bar of photon crystal laser, the spherical lens, the speculum, the focusing coupling mirror and the optical fiber.
The invention provides a kind of device that beam is closed based on photon crystal laser, the speed direction of principal axis of the device is improved
The angle of divergence, improve the quality of entire light, it is more effective using the clear aperature for focusing on coupling mirror, answering of reducing that device debugs
Polygamy and resetting difficulty, also reduce cost of manufacture, and the clear aperature and optical fiber core diameter for focusing on coupled lens are improved to the full extent
Utilization rate so that obtain maximum coupling output.
Brief description of the drawings
Fig. 1 is the top view of the device that beam is closed based on photon crystal laser；
Fig. 2 is the heat sink structure of ladder and scale diagrams；
Fig. 3 is the structural representation that the short bar bar of photon crystal laser shows (dash area is laser tube core)；
Fig. 4 A and Fig. 4 B are respectively the light that single photonic crystal laser carries out that fast axle and slow axis compress using spherical lens
Lu Tu；
Fig. 5 is to be simulated to detect the spot intensity distribution map for obtaining into before optical fiber by software；
Fig. 6 is the present invention using the schematic device after polarization technology extension.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with specific embodiment, and reference
Accompanying drawing, the present invention is described in further detail.
The various structural representations according to wooden disclosure of the invention embodiment are shown in the drawings.These figures are not in proportion
Draw, wherein for the purpose of clear expression, amplifying some details, and some details may be eliminated.Shown in figure
Various data, shape and the relative size between them, position relationship instrument be it is exemplary, in practice may be due to manufacture
Tolerance or technology is limited and the deviation that causes, and those skilled in the art can design with difference in addition according to actually required
Shape, size, relative position.
Fig. 1 is a kind of top view of the device that beam is closed based on photon crystal laser.As illustrated, the device includes：1 rank
The short bar bar of terraced heat sink, 2 photon crystal lasers, 3 spherical lenses, 4 speculums, 5 focus on coupling mirror, 6 shells and 7 optical fiber.
The short bar bar 2 of photon crystal laser and optical fiber 7 are located at spherical lens 3 and focus on the focus of coupling mirror 5 respectively
Place, and then realize that from the laser of the outgoing of spherical lens 3 be all collimated light beam, just can guarantee that the laser for inciding and focusing on coupling mirror 5
All it is collimated light beam, light beam converges in the focal point for focusing on coupling mirror 5 in optical fiber side, to the full extent coupled into optical fibres.
One speculum 4 of the short correspondence of bar bar 2 of each photon crystal laser, realizes that photonic crystal swashs by speculum 4
The turnover of the light path of multiple luminescence units on the short bar bar 2 of light device, the reflecting surface of speculum 4 is coated with and the short bar of photon crystal laser
The corresponding high-reflecting film of the excitation wavelength of bar 2, the distance of all speculums 4 to ladder heat sink 1 is identical, and heat sink with ladder 1 is in
45 ° of placements.Light beam is reflexed on the convex surface for focusing on coupling mirror 5 by speculum 4, then realizes focusing on after over-focusing coupling mirror 5, most
Coupled into optical fibres 7 afterwards.
The short bar bar 2 of photon crystal laser and ladder heat sink 1 complete to close beam, and the short bar bar 2 of photon crystal laser
Quantity and spacing 1 numbers of steps heat sink with ladder and the spacing difference of upper luminescence unit are equal, realize before coupling mirror 5 is focused on
Hot spot distribution be in subquadrate, improve focus on the clear aperature of coupling mirror 5 utilization rate, can also reduce focusing coupling mirror 5
The influence of aberration.
The shell is used to place heat sink 1 ladder, the short bar bar of 2 photon crystal lasers, 3 spherical lenses, 4 speculums, and 5 gather
Burnt coupling mirror and 7 optical fiber.
Fig. 2 is the heat sink structure of ladder and scale diagrams.As illustrated, the ladder heat sink 1 with certain shoulder height,
The spot size that shoulder height difference should combine the short bar bar 2 of photon crystal laser is designed, and meets the hot spot of outgoing on adjacent table top
Reflected mirror 4 is no on quick shaft direction when reflecting to be overlapped, and step number should be not less than 2.The step that we set in simulation
Highly it is 0.500mm, minimum shoulder height is 1.600mm, and have three layers step altogether.
Ladder heat sink 1 is used in the device, the short bar bar 2 of photon crystal laser has been welded on the ladder using solder
On heat sink 1 surface, the laser of photon crystal laser short bar bar 2 outgoing of different shoulder heights by after speculum 4, Ke Yishi
The superposition of existing quick shaft direction hot spot.One photon crystal laser short bar bar 2 is housed on each step of the ladder heat sink 1.
Fig. 3 is the structural representation that the short bar bar of photon crystal laser shows (dash area is laser tube core).As schemed
Show, wood invention assumes there are three luminescence units on the short bar bar 2 of each photon crystal laser, 3 photons are had in whole device
Crystal laser 2,9 luminescence units of short bar bar.And the cycle of the short bar bar 2 of photon crystal laser is 0.500mm, half
Fast axis divergence angle at overall with high is about 12 degree, and slow axis divergence is about 7 degree.The short bar bar 2 of photon crystal laser for being used
Front facet take the anti-reflection film process of plating.Each unit of the short bar bar 2 of each photon crystal laser uses a spherical lens 3
The compression of the fast and slow axis angle of divergence is carried out, the focal length of the spherical lens 3 designed according to existing laser parameter is 0.256mm.Fast axle
After the superposition of direction and the hot spot number of slow-axis direction is all 3, it is distributed with meeting the last hot spot focused on before coupling mirror 5 that reflexes to
In subquadrate, the clear aperature of focusing coupling mirror 5 and the core diameter of optical fiber 7 is set all to reach the utilization rate of maximum.
The device carries out conjunction beam using the short bar bar 2 of photon crystal laser, and nearly circle can be realized using photon crystal laser
The characteristics of shape hot spot is exported (such as patent of invention and document of Application No. 201310082285.3：Lei Liu, Wanhua
Zheng et al.Design and Analysis of Laser Diodes Based on the Longitudinal
Photonic Band Crystal Concept for High Power and Narrow Vertical Divergence,
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, VOL.21, NO.1, JANUARY/
Described in FEBRUARY2015), i.e. fast and slow axis angle of divergence difference very little, using a spherical lens 3 replace fast axis collimation mirror and
Slow axis collimating mirror, realizes being compressed while fast and slow axis directional divergence angle, the spherical mirror 3, and being will be according to photon crystal laser
Want spot size size for obtaining etc. after the angle of divergence of the short output beam of bar bar 2 and compression to be designed.
The short bar bar 2 of photon crystal laser has the artificial periodic dielectric structures of photon band gap characteristic, frequency
The electromagnetic wave in photon band gap that falls is forbidden propagating.Photonic crystal is incorporated into semiconductor laser, photonic crystal light
The presence of subband gap has the generation of the suppression and stimulated radiation beneficial to spontaneous radiation.Modulation using photonic crystal to |photon state | is made
With, the optics cavity quality factor of several order of magnitude bigger than conventional semiconductor laser can be obtained, increase substantially laser
Brightness and monochromaticjty.General semiconductor laser, quick shaft direction sends out fast axle due to the mode sizes very little perpendicular to active area
Scattered angle is very big.And the short bar bar 2 of photon crystal laser can be reduced by the periodic modulation and Mode Coupling of photonic crystal
Fast axis divergence angle, realizes the hot spot output of subcircular, accurate instead of fast axis collimation mirror and slow axis such that it is able to design a spherical mirror
Straight mirror completes the compression to the fast and slow axis angle of divergence, reduces the dress of the quantity and more lens straps rice for closing optical element in light source beam
Error is adjusted, cost of manufacture is reduced.
Fig. 4 A and Fig. 4 B are respectively the light that single photonic crystal laser carries out that fast axle and slow axis compress using spherical lens
Lu Tu.As illustrated, single photonic crystal laser carries out the index path that fast axle and slow axis compress using spherical lens 3.Due to
Photon crystal laser can realize the far field output of subcircular hot spot, therefore single photonic crystal laser uses spherical lens 3
It is close to carry out the index path of fast axle and slow axis compression.
Fig. 5 is to be simulated to detect the spot intensity distribution map for obtaining into before optical fiber by software.As illustrated, being that simulation is obtained
Entrance optical fiber before the spot intensity figure that detects, as it is anticipated that as, focus on the hot spot before coupling mirror 5 near square
Shape is distributed, and the coupling efficiency that the light beam coupling that simulation is obtained enters optical fiber 7 is more than 99%.
Fig. 6 is the present invention using the schematic device after polarization technology extension.As illustrated, the device can use reflection
Mirror 8, polarization prism 9 and half-wave plate 10 are further expanded.It is twice by increasing overall power output after the method extension, light
Beam quality is constant.
The device can still be further expanded, and conjunction light source beam as shown in Figure 6 realizes wavelength coupling by wavelength coupling device, enters
And obtain bigger power output.Therefore the device can also realize the coupling output of hectowatt magnitude by simple extension.
Particular embodiments described above, to the purpose of the present invention, technical scheme and have why not effect carried out further in detail
Describe in detail bright, it should be understood that the foregoing is only specific embodiment of the invention, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements done etc. should be included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of device that beam is closed based on photon crystal laser, including ladder is heat sink, the short bar bar of photon crystal laser, sphere
Lens, speculum and focusing coupling mirror；
The ladder is heat sink to be made up of the step of different height, and a short bar of photon crystal laser is placed on each step
Bar；
Outgoing is near parallel sharp after the laser of each short bar bar transmitting of photon crystal laser compresses through the spherical lens
Light；
One speculum of the short bar bar correspondence of each photon crystal laser, photon crystal laser is realized by the speculum
The light path of short bar bar outgoing beam turns back to incide the focusing coupling mirror；
The coupling mirror that focuses on is used to focus on the light beam after sharp combiner.
2. it is according to claim 1 based on photon crystal laser close beam device, it is characterised in that the ladder is heat sink
Step number be not less than 2.
3. it is according to claim 1 based on photon crystal laser close beam device, it is characterised in that the photonic crystal
The front facet of the short bar bar of laser takes the anti-reflection film process of plating.
4. it is according to claim 1 based on photon crystal laser close beam device, it is characterised in that the photonic crystal
The short bar bar of laser contains multiple luminescence units.
5. it is according to claim 4 based on photon crystal laser close beam device, it is characterised in that the photonic crystal
The quantity and spacing of the luminescence unit on the short bar bar of laser are equal with the heat sink numbers of steps of ladder and spacing difference, can realize
Hot spot distribution before the focusing coupling mirror is in subquadrate.
6. it is according to claim 1 based on photon crystal laser close beam device, it is characterised in that the photonic crystal
The hot spot of the short bar bar output of laser is subcircular hot spot.
7. it is according to claim 1 based on photon crystal laser close beam device, it is characterised in that the speculum
Reflecting surface is coated with the high-reflecting film corresponding with the excitation wavelength of the short bar bar of the photon crystal laser.
8. it is according to claim 1 based on photon crystal laser close beam device, it is characterised in that the speculum is arrived
The distance that the ladder is heat sink is to maintain constant, and is also to maintain with the angle of the heat sink placement of the ladder constant.
9. it is according to claim 1 based on photon crystal laser close beam device, it is characterised in that also including optical fiber,
The optical fiber is used to transmit the laser after being focused on by the focusing coupling mirror.
10. it is according to claim 1 based on photon crystal laser close beam device, it is characterised in that also including shell,
The shell is used to accommodate the heat sink ladder, the short bar bar of photon crystal laser, the spherical lens, the reflection
Mirror, the focusing coupling mirror and the optical fiber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611079549.XA CN106785895A (en) | 2016-11-30 | 2016-11-30 | A kind of device that beam is closed based on photon crystal laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611079549.XA CN106785895A (en) | 2016-11-30 | 2016-11-30 | A kind of device that beam is closed based on photon crystal laser |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086081A (en) * | 2019-06-17 | 2019-08-02 | 中国科学院半导体研究所 | Micro-thruster light source based on photor crystal laser array |
| CN110224298A (en) * | 2019-07-22 | 2019-09-10 | 中国科学院半导体研究所 | A kind of spectrum beam combination structure based on photor crystal laser |
| CN110488429A (en) * | 2019-07-08 | 2019-11-22 | 广东工业大学 | A kind of multikilowatt semiconductor laser fiber coupling module |
| WO2021197099A1 (en) * | 2020-03-31 | 2021-10-07 | 青岛海信激光显示股份有限公司 | Laser projection device |
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| US20080019010A1 (en) * | 2006-07-18 | 2008-01-24 | Govorkov Sergei V | High power and high brightness diode-laser array for material processing applications |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086081A (en) * | 2019-06-17 | 2019-08-02 | 中国科学院半导体研究所 | Micro-thruster light source based on photor crystal laser array |
| CN110488429A (en) * | 2019-07-08 | 2019-11-22 | 广东工业大学 | A kind of multikilowatt semiconductor laser fiber coupling module |
| CN110224298A (en) * | 2019-07-22 | 2019-09-10 | 中国科学院半导体研究所 | A kind of spectrum beam combination structure based on photor crystal laser |
| WO2021197099A1 (en) * | 2020-03-31 | 2021-10-07 | 青岛海信激光显示股份有限公司 | Laser projection device |
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Inventor after: Zheng Wanhua Inventor after: Xing Xiaoxu Inventor after: Chen Zhonghao Inventor after: Chen Yang Inventor before: Zheng Wanhua Inventor before: Chen Yang Inventor before: Zhang Yufang Inventor before: Wang Mei |
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