CN104503099B - Light polarization compensation device based on beam shaping technology and space beam combination system - Google Patents
Light polarization compensation device based on beam shaping technology and space beam combination system Download PDFInfo
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- CN104503099B CN104503099B CN201510011301.9A CN201510011301A CN104503099B CN 104503099 B CN104503099 B CN 104503099B CN 201510011301 A CN201510011301 A CN 201510011301A CN 104503099 B CN104503099 B CN 104503099B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
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Abstract
The invention relates to a light polarization compensation device for utilizing a beam shaping technology and a space beam combination system to convert incident laser into polarized laser to be output and belongs to the technical field of light polarization compensation. The device mainly comprises an input optical interface, a polarization beam splitter, a shaper, a first reflecting mirror, a spiral wave device, a second reflecting mirror and a space beam combiner. Against the polarization compensation problem of a laser, the light polarization compensation device aims to solve the problem of polarization instability and low extinction ratio of the laser, the lossless polarization compensation device based on the high-duty-cycle space beam combination system and the beam shaping technology is provided, and random laser is converted into high-extinction-ratio polarization laser to be output on the condition that the laser power level and beam quality are not affected. The light polarization compensation device is very small in power loss, the structure of the laser is not affected, and the cost and the complexity of the linear polarization laser can be effectively reduced; a control method for the light polarization compensation device is simple, a feedback and control system does not need to be arranged, and the light polarization compensation device is stable and reliable in performance.
Description
Technical field
The present invention relates to one kind closes beam system using beam shaping technology and space, and incident laser is converted to polarization laser
The light polarization compensation device of output, belongs to light polarization compensation technique field, can be widely applied to light beam synthesis, non-linear frequency becomes
Change, the field such as polarization optics.
Background technology
High brightness linearly polarized laser has widely in fields such as laser communication, remote sensing remote measurement, industrial processes, scientific researches
Application.However, being limited by the impact of the heat effect of gain media, nonlinear effect and stress birfringence effect etc., single sharp
Light device is difficult to obtain the output of high brightness linearly polarized laser.Particularly in optical fiber laser field, grow because fiber medium is superfine
Spend longer it is easier to be subject to external interference or generation to bend, cause temperature and stress distribution to lead to polarization to be degenerated, cause linear polarization
The power drop of laser, has a strong impact on its stability.It is using the inclined device of all risk insurance that solution universal at present has three kinds: one,
The program is expensive, and is difficult to high-power output；Two is using polarization pre-compensation techniques, before optical fiber laser amplifier
End adds the change of Polarization Controller compensating polarizing, and the program is related to polarization feedback system, considerably increases answering of laser structure
Polygamy；The third is to improve its extinction ratio by wave plate combined after laser output, and the program equally need to introduce feedback system, and
To non-polarized Raman laser and inapplicable.The present invention adopts end compensation way, is not affecting laser instrument original structure and power level
On the basis of, by adding beam shaping system and space to close beam system in laser end, the laser of any extinction ratio is mended
Repay as polarization laser.
Content of the invention
The purpose of the present invention is polarization compensation problem for laser instrument it is intended to solving laser instrument polarization unstability and disappearing
Light, than low problem, proposes a kind of lossless polarization compensation dress closing beam system and beam shaping technology based on high duty ratio space
Put, under conditions of not affecting laser power level and beam quality, any laser is converted to High Extinction Ratio polarization laser defeated
Go out.Power attenuation very little of the present invention, and do not affect this body structure of laser instrument, can effectively reduce linearly polarized laser device cost and complexity
Property, control method of the present invention is simple simultaneously, need not additional feed back and control system, stable and reliable for performance.
The technical solution used in the present invention is: a kind of light polarization compensation closing beam system and beam shaping technology based on space
Device, main inclusion input optical interface, polarization beam apparatus, reshaper, the first reflecting mirror, rotation ripple device, the second reflecting mirror, space are closed
Bundle device, incident laser to be converted is imported and is expanded or shrink beam is the laser that spot radius are ω, process by inputting optical interface
It is divided into the orthogonal linearly polarized laser in two-way polarization direction, wherein one route polarization laser is anti-through the second reflecting mirror after polarization beam apparatus
Space bundling device is injected, another route polarization laser first passes through reshaper and is transformed to inner circle radius is ω after penetrating1Annular beam,
Then enter rotation ripple device after the first reflecting mirror reflection, the changeable direction of polarization of this annular beam is and first by described rotation ripple device
Inject space bundling device after road polarization laser polarization direction is identical, bundle is closed by space two-way polarization direction identical laser is closed
Become a branch of output.Said apparatus can compensate the incident laser of any extinction ratio for linearly polarized laser output.
Described incident laser to be converted, by LASER Light Source outgoing to be converted, can be random polarization, partial polarized light
Or non-polarized light.
LASER Light Source to be converted can be LASER Light Source to be converted or the spatial light of optic fibre light path as above
The LASER Light Source to be converted on road.
Described input optical interface, for being transformed to the laser that spot radius are ω, the size of ω after importing incident laser
Determined by reshaper and space bundling device design parameter, LASER Light Source structure design distinct interface to be converted can be directed to, specifically
Realized using two categories below structure: optical fiber collimator device or adjustable expansion/shrink beam lens assembly:
Optical fiber collimator device as above is applied to the LASER Light Source to be converted of optic fibre light path, for by input optical fibre
Laser be converted to radius be ω space laser output, its structure can for optical fiber/lens combination or have similar function its
His device.
Adjustable expansion/shrink beam lens assembly is applied to the LASER Light Source to be converted of space optical path as above, for will be defeated
Enter laser linewidth and be converted into the space laser output that radius is ω, structure can be lens group or other dresses with similar function
Put.
Described polarization beam apparatus are Glan prism, plating polarization spectro film glass or Brewster piece and can be by incident laser
It is divided into the orthogonal similar device of two bundle polarization states.
Described reshaper is used for realizing the conversion from circular light beam to annular beam, specifically can adopt following three kinds of devices
Or there is the device of similar function realized: geometric optics device, diffractive optical device or plated film lens device:
Geometric optics device as above is single bipyramid lens, multiple axicon lens group or taper reflection group, passes through
Adjust the distance between cone angle or taper reflection of each axicon lens so that outgoing ring-shaped light spot inner circle radius are ω1, ω1One
As be slightly larger than ω, ω1Occurrence according to adopt space bundling device species and incident laser to be converted pattern determine, with protect
During bundle is closed in card space, two-way laser has highest efficiency of transmission and dutycycle simultaneously；
Diffractive optical device as above is vortex phase piece or radial grating, and now reshaper must also be realized necessarily
Expand function, this function is by using beam expanding lens or the telescopic system that is made up of two lens realizes so that outgoing ring
Shape hot spot inner circle radius are ω1, ω1Typically it is slightly larger than ω, ω1Occurrence according to adopt space bundling device species and wait turn
The pattern changing incident laser determines, has highest efficiency of transmission and duty with two-way laser during ensureing space conjunction bundle simultaneously
Than；
As mentioned above plated film lens device is to plate phase place heterogeneous membrane in center of lens, using central laser and edge lasers
Interfere and form hollow structure, during design it should be noted that guarantee space is closed two-way laser during restrainting and had highest efficiency of transmission simultaneously
And dutycycle.
Described rotation ripple device is λ/2 wave plate or crystal revolves wave plate, and the species that described crystal revolves wave plate swashs according to incidence to be converted
The wavelength of light determines.
Described space bundling device is hollow aperture mirror or plates the eyeglass of reflectance coating in center of lens or other have space and close bundle
The eyeglass of function, effect is that two bundle incident lasers are merged into beam of laser；The size of described hollow aperture mirror centre bore or center
The size of plated film lens center plated film radius according to depending on processing technique it is therefore intended that ensure two-way laser there is highest simultaneously
Efficiency of transmission and dutycycle.
Further, in specific implementation process, reshaper would generally change laser phase distribution, causes wavefront distortion,
Lead to outgoing laser beams quality to compare incident laser can decline, for meeting the application neck that some are strict with beam quality
Domain requires, and compensates distortion by installing beam alignment correction device after the bundling device of space additional, improves quality for outputting laser beam, make device
Finally under the conditions of not affecting laser power and beam quality, incident laser is converted to linearly polarized laser output.
Further, incident laser can be compensated and export for linearly polarized laser, by adding in device end by said apparatus
Output laser polarization state can be modulated to arbitrarily required polarization, improve system suitability, described polarization control by dress Polarization Controller
Device processed can for wave plate, rotation wave plate, piezoquartz or other there is the device of similar function.
Further, the spot radius of said apparatus output laser there occurs relative to the spot radius ω of incident laser and change
Become, by installing output optical interface additional in device end, the spot radius of output laser can be converted into to input laser consistent,
Improve this device versatility.Specifically two categories below structure can be adopted to realize for different light paths: fiber coupler device or can
Tune expansion/shrink beam lens assembly:
Fiber coupler device as above is applied to optic fibre light path output, for entering to protect spatial polarization laser coupled
Optical fiber output partially, structure can be lens and polarization maintaining optical fibre combination or other devices with similar function.
Adjustable expansion/shrink beam lens assembly is applied to space optical path output as above, for becoming closing bundle laser linewidth
Shift to required width, structure can be lens group or other devices with similar function.
The present invention has following technical effect that
1st, the present invention is end polarization compensation technology, can not change original laser structure, can not affect laser instrument
The parameters such as power level, beam quality, output beamwidth；
2nd, the present invention is not required to additional real-time feedback system, and structure is simple, extinction ratio high it is adaptable to any laser；
3 the invention is characterized in that the shaping of light beam and high duty ratio close bundle, by designing the conjunction bundle scheme of pattern match,
Can ensure to export the beam quality of laser to greatest extent, and keep exporting the centre symmetry of laser；
4th, the present invention by changing trim conditions and can close bundle mode, realizes swashing of different beam qualities and pattern distribution
Light output.
Brief description
Fig. 1 is the embodiment of the present invention 1: polarization compensation device basic structure schematic diagram, wherein reshaper adopt two cones thoroughly
Microscope group, space clutch adopts 45 degree of hollow aperture mirrors；
Fig. 2 space bundling device is the conjunction bundle principle schematic of 45 degree of hollow aperture mirrors；
Fig. 3 is to produce annular beam intensity distributions schematic diagram during single bipyramid lens for reshaper；
Fig. 4 is that bundle laser near-field and focal point light distribution are closed in embodiment 1 actual measurement c road, and (a) near field intensity distribution (b) is burnt
Point light distribution.
Fig. 5 is the embodiment of the present invention 2: space bundling device is polarization compensator structural representation during 45 degree of center diaphragm mirrors,
Wherein reshaper adopts two axicon lens groups；
Fig. 6 space bundling device is the conjunction bundle principle schematic of 45 degree of center diaphragm mirrors；
Fig. 7 is embodiment 3: the polarization with phasing repays device structural representation；
Fig. 8 is to produce annular beam PHASE DISTRIBUTION schematic diagram during single bipyramid lens for reshaper；
Fig. 9 is to produce annular beam schematic diagram during vortex phase piece for reshaper；
Figure 10 is embodiment 4: the polarization of exportable random polarization light repays device structural representation；
Figure 11 is embodiment 5: the polarization optimizing output repays device structural representation.
In figure: 1, input optical interface；2nd, polarization beam apparatus；3rd, reshaper；4th, the first reflecting mirror；5th, revolve wave plate；6th, second
Reflecting mirror；7th, space bundling device；8th, beam alignment correction device；9th, Polarization Controller；10th, export optical interface.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme is described in further detail.
Accompanying drawing 1 is the embodiment of the present invention 1, and this embodiment can be under conditions of power attenuation be minimum, by incidence to be converted
Laser is converted to linearly polarized laser output.Incident laser to be converted passes through to input optical interface 1 incidence and be transfused to optical interface 1 to change
For the laser for ω for the spot radius, described spot radius are that the laser of ω is divided into polarization direction orthogonal by polarization beam apparatus 2
Two-way line polarisation, is designated as light path a and light path b, wherein light path a after the second reflecting mirror 6 reflection, respectively from space bundling device 7
Center is lossless to be passed through, and is transformed to internal bore radius ω after the shaped device of light path b 31Slightly larger than the annular beam of ω, used whole in Fig. 1
Shape device 3 is two single axicon lens, from described reshaper 3 outgoing annular beam again after the first reflecting mirror 4 reflection, by rotation ripple device 5
By its polarization direction be converted to identical with light path a after, re-incident space bundling device 7.In Fig. 1, space used bundling device 7 is surface
It is coated with the hollow aperture mirror of 45 degree of films that are all-trans, its structure and working principle as shown in Fig. 2 in the present embodiment, closed by space by light path b
The film reflection of being all-trans on bundle device 7 surface, light path a is passed through from space bundling device centre bore is lossless, and adjusting light path makes the reflected light of light path b
Coaxial with light path a and synthesize light path c output, this time space bundling device 7 shoot laser power is compared with former incident laser power
Loss is minimum, and polarization state is changed into linearly polarized laser, and no matter inputting laser is random polarization light, partial polarized light or unpolarized
Light, after said system, shoot laser is all changed into linearly polarized laser.
Described incident laser, by LASER Light Source outgoing to be converted, can be random polarization, partial polarized light or unpolarized
Light.
LASER Light Source to be converted can be the LASER Light Source to be converted of optic fibre light path as above, such as non PM fiber
Laser instrument or the LASER Light Source to be converted of space optical path, such as nd:yag solid state laser.
Input optical interface 1 as above, for being transformed to the laser that spot radius are ω, ω after importing incident laser
Size determine by reshaper 3 and space bundling device 7 design parameter, the structure design that can be directed to LASER Light Source to be converted is different
Interface, specifically adopts two categories below structure to realize: optical fiber collimator device and adjustable contracting/expander lens device.Adopt in accompanying drawing 1
Optical fiber collimator device is as input optical interface 1.
Optical fiber collimator device as above is applied to the LASER Light Source to be converted of optic fibre light path, for by input optical fibre
Laser is converted to the space laser output that radius is ω, and structure can be other devices of optical fiber/lens combination or similar function.
Adjustable expansion/shrink beam lens assembly is applied to the LASER Light Source to be converted of space optical path as above, for will be defeated
Enter laser linewidth and be converted into the space laser output that radius is ω, structure can be other devices of lens group or similar function.
Described polarization beam apparatus 2, for being divided into the orthogonal linearly polarized laser in two-way polarization direction, Ke Yiwei by incident laser
Glan prism, plating polarization spectro film glass, Brewster piece or other incident laser can be divided into two bundle polarization states orthogonal
Similar device.
Described reshaper 3, for realizing the conversion from circular light beam to annular beam, specifically can adopt and have following work(
Can three kinds of devices realized: geometric optics device (such as single bipyramid lens, as shown in figure 3, or multiple axicon lens group, such as
Shown in Fig. 1, or taper reflection group or other devices with similar function), diffractive optical device (such as vortex phase piece, such as
Shown in Fig. 8, or radial grating or other devices with similar function) or plated film lens device.
Described first reflecting mirror 4, the second reflecting mirror 6 are used only for changing direction of beam propagation, for the property of laser itself
Matter does not have any impact.
Described rotation ripple device 5, makes it identical with light path a polarization direction for ratating 90 degrees light path b polarization direction, Ke Yishi
λ/2 wave plate or crystal revolve wave plate or other devices with similar function；
Described space bundling device 7, for laser space close bundle, can be 45 degree of high-reflecting films of plated surface hollow aperture mirror or
The eyeglass of 45 degree of high-reflecting films or other devices with similar function are plated in center local.It is 45 degree of high-reflecting films of plated surface in Fig. 1
Hollow aperture mirror.
Fig. 2 gives the conjunction bundle principle schematic of the space bundling device 7 in embodiment 1 based on 45 degree of hollow aperture mirrors, described
Hollow aperture mirror lens surface plates 45 degree of high-reflecting films, and centre bore is located at minute surface center, and perforate direction becomes 45 degree of angles with minute surface, perforate half
Footpath is more than light path a beamwidth radius ω and is less than light path b inner circle radius ω1, during use, eyeglass becomes 45 degree of angles to put with incident light axis
Put, Gaussian beam a directly passes through centre bore, it is light path c that annular beam b closes bundle through direct reflection and light path a, and final realization is coaxial
Line polarisation exports.
It is to produce annular beam intensity distributions schematic diagram during single bipyramid lens that Fig. 3 gives reshaper 3.
Fig. 4 is embodiment 1 experimental result, and in experiment, laser to be converted exports laser, its work(for non PM fiber laser instrument
Rate is 19.2w, transforms it into the base of diameter 5mm (corresponding ω is 2.5mm) using the input optical interface 1 of optical fiber collimator structure
Mould gauss laser, is divided into polarization direction perpendicular to a road laser of paper and polarization direction parallel to paper after polarization beam apparatus 2
The b road laser output in face, actual measurement two bundle laser power is respectively 11.3w (a road), 7.8w (b road), i.e. original laser extinction ratio
For:
A road laser, after the second reflecting mirror 6 reflection, passes through from space bundling device 7 center is lossless, light path b is through two bottoms
Diameter 25.4mm, cone angle is that the reshaper 3 of 140 ° of axicon lens composition is transformed to diameter of bore 7mm (corresponding ω1For 3.5mm)
Its polarization direction is converted to identical with light path a by annular beam by rotation ripple device 5, re-incident space bundling device 7, space bundling device 7
For the hollow aperture mirror of 45 degree of films that are all-trans of plated surface, center-hole diameter 6mm, now a road laser passed through by hole center is lossless, b road is swashed
Light closes bundle for the output of light path c with a road laser coaxial after 45 degree of film reflections of being all-trans through hollow aperture mirror surface, closes bundle laser polarization side
To for perpendicular to paper, actual measurement output laser power is 18.7w, extinction ratio about 99.7%.Fig. 4 gives the near of actual measurement light path c
Light distribution and after being focused on using simple lens focal point light distribution it can be seen that annular beam and Gaussian beam maintain good
Good alignment.
Knife-edge method actual measurement light path a, light path b, the far-field divergence angle θ of light path c light beam is adopted in table 1 example 1
(θ in tablexRepresent parallel paper directional divergence angle, θyRepresent vertical paper directional divergence angle)
Table 1 gives light path a (Gaussian beam) tested using 90% knife-edge method, light path b (annular beam), (conjunction of light path c
Light beams) laser beam divergence (θ in tablexRepresent light beam in equality paper directional divergence angle, θyRepresent light beam in vertical paper direction
The angle of divergence), wherein light path a laser beam divergence is identical with original incident laser, and measurement result shows, laser to be converted passes through this
After bright device, far-field divergence angle increases to about 0.30mrad by about 0.27mrad, and power drops to 18.7w, extinction ratio by 19.2w
Improved to 99.7% by 18.3%, it can thus be seen that embodiment 1 system power dissipation is minimum, the angle of divergence is increased slightly, delustring
It is greatly improved it is achieved that incident laser is converted to the target of linearly polarized laser output than then.
Accompanying drawing 5 is the embodiment 2 of apparatus of the present invention: space bundling device 7 is to be shown based on structure during 45 degree of center diaphragm mirrors
It is intended to, with example 1 difference, it is that bundling device 7 used is 45 degree of center diaphragm mirrors.In Fig. 5, laser to be converted passes through input
Optical-path interface 1 is incident and is converted into the laser that radius is ω, is divided into the orthogonal two-route wire in polarization direction by polarization beam apparatus 2
Polarisation, is designated as light path a and light path b respectively, is transformed to internal bore radius ω after the shaped device of light path b 31Ring light slightly larger than ω
Bundle, in Fig. 5, reshaper 3 used is two single axicon lens, after outgoing annular beam reflects through the first reflecting mirror 4 again, by rotation ripple device 5
By its polarization direction be converted to identical with light path a after, re-incident space bundling device 7 and lossless pass through, light path a is passed through second and is reflected
Incident space bundling device 7 being reflected after mirror 6 reflection, adjusting light path makes the reflected light of light path a and light path b coaxially defeated for light path c
Go out, close Shu Yuanli and effect as shown in fig. 6, this time space bundling device 7 shoot laser power and former incident laser power level phase
With, and polarization state is changed into linearly polarized laser it is achieved that the purpose of polarization compensation of the present invention.
Fig. 6 gives the space based on 45 degree of center diaphragm mirrors in embodiment 2 and closes bundle principle schematic, and bundle is closed in space used
Device 7 is 45 degree of center diaphragm mirrors, as shown in fig. 6,45 degree of high-reflecting films are plated in center of lens local, high-reflecting film is located in minute surface structure
The heart, radius is more than light path a beamwidth radius ω and is less than light path b inner circle radius ω1, minute surface remainder plates 45 degree of anti-reflection films or not
Plated film (for not plated film in the present embodiment).During use, eyeglass is become 45 degree of angles to place with incident light axis, Gaussian beam a is by eyeglass
Center high-reflecting film reflection, annular beam light path b closes bundle from minute surface remainder transmission and with light path a, finally realizes coaxial line inclined
Shake light output.
Accompanying drawing 7 is the embodiment of the present invention 3, and its structure is to have installed beam alignment correction device 8 additional to solve in embodiment 1 device outfan
The problems such as beam quality that certainly embodiment 1 device exists declines.In the embodiment of the present invention 1 device implementation process, reshaper 3 meeting
Introduce additive phase, thus changing the distribution of light path b laser phase, causing wavefront distortion, leading to outgoing laser beams quality to be compared
Incident laser can decline (accompanying drawing 8 show reshaper 3 be bipyramid lens when lead to PHASE DISTRIBUTION, accompanying drawing 9 shows shaping
Device 3 is the additive phase distribution introducing during vortex phase piece).The additional phase information being introduced due to reshaper 3 is it is known that be to meet
The application that some are strict with beam quality requires, and can install beam alignment correction device 8 additional to correct ripple after space bundling device 7
Front-distortion, error during closing bundle for the compensation space bundling device 7 simultaneously, improves quality for outputting laser beam, optimization system makes
Incident laser is finally converted to linearly polarized laser output under the conditions of not affecting laser power and beam quality by it.
Described beam alignment correction device 8, for compensating reshaper 3 and beam intensity that space bundling device 7 leads to or phase place
Distribution, to optimize the beam quality closing Shu Jiguang, improves system suitability further.Beam alignment correction device 8 can be to realize wavefront
Modulation or the optics of intensity modulated, can be the difference piece for reshaper 3 and space bundling device 7 Design and Machining or liquid crystal
Spatial light modulator or distorting lenss or the beam alignment correction device with similar effect.Outgoing laser beams after beam alignment correction device 8
Quality can be optimized to identical with laser to be converted, as shown in Figure 7.Closed with bipyramid microscope group in example 1 and realize input tem00Mould is high
This light beam polarization compensate as a example, light path b produce annular beam intensity distributions as shown in figure 3, PHASE DISTRIBUTION as shown in figure 8, because
This closes after bundle before laser wave and all approximate lp of intensity distributions02Mould, beam quality compares tem00The incident laser of mould has declined.
But the PHASE DISTRIBUTION being introduced due to reshaper 3 is it is known that therefore can be according to the structure design of reshaper 3 corresponding beam alignment correction device
8, it is corrected to nearly diffraction limit by closing bundle laser beam quality, this is also the advantage place of the present invention.
Accompanying drawing 8 shows that reshaper 3 is the annular beam PHASE DISTRIBUTION producing during bipyramid lens, it can be seen that
Incident beam is changed into ring-like from Gaussian before bipyramid lens postwave；
Accompanying drawing 9 produces annular beam principle schematic for vortex phase piece it is shown that reshaper 3 is to draw during vortex phase piece
The additive phase distribution entering, it can be seen that incident beam intensity distributions after vortex phase piece are changed into from Gaussian
Ring-like, but phase place then increased vortex phase；
Accompanying drawing 10 be the embodiment of the present invention 4, its structure be embodiment 3 described device end install additional Polarization Controller 9 with
Improve apparatus of the present invention suitability.Incident laser can be compensated and export for linearly polarized laser by attached embodiment illustrated in fig. 73 device,
Embodiment 4 is directed to different field to other polarization laser demands, by installing Polarization Controller 9 additional in this device end, can be by
Output laser polarization state is modulated to arbitrarily required polarization state, improves system suitability.
Described Polarization Controller 9, (can be linear polarization, permissible for linearly polarized laser is transformed to required polarization laser
Be elliptical polarization, can also be circular polarization) output improving system suitability, be wave plate or rotation wave plate or piezoquartz or can
Realize other devices of similar function.
Accompanying drawing 11 is the embodiment of the present invention 5, and its structure is to have installed output optical interface 10 additional to carry in embodiment 4 device end
High apparatus of the present invention suitability.In above-described embodiment 1～4 device, output laser diameter all there occurs relative to incident laser and changes
Become, by installing output optical interface additional in device end, output laser diameter can be converted into to input laser consistent, thus
Do not affect laser power level, beam quality and width of light beam isoparametric under the conditions of it is achieved that incident laser is converted to institute
Need polarization laser to export, improve the versatility of apparatus of the present invention.
Described output optical interface 10, is used for converting laser light into and original incident laser linewidth identical laser emitting, tool
Body can adopt two categories below structure to realize for different light paths: fiber coupler device or adjustable contracting/expander lens device:
Fiber coupler device as above is applied to optic fibre light path output, for entering to protect spatial polarization laser coupled
Optical fiber output partially, its structure can be lens and polarization maintaining optical fibre combination or other devices with similar function；
Adjustable contracting/expander lens device is applied to space optical path output as mentioned above, for closing bundle laser linewidth conversion
To required width, its structure can be lens group or other devices with similar function.
Although describe the present invention in detail with reference to above-described embodiment it should be appreciated that the present invention be not limited to disclosed
Embodiment.For the technical staff of this professional field, can be carried out with the function that its form and details are realized as needed
Various changes, although installed additional respectively on the basis of embodiment 1 in such as embodiments of the invention 3～5 beam alignment correction device 8,
Polarization Controller 9 and output optical interface 10, but described beam alignment correction device 8, Polarization Controller 9 and output optical interface 10 can also roots
According to inventing, function to be realized individually installs additional or combination of two installs additional.
Claims (4)
1. a kind of based on space close beam system and beam shaping technology light polarization compensation device it is characterised in that: this device master
Including input optical interface (1), polarization beam apparatus (2), reshaper (3), the first reflecting mirror (4), rotation ripple device (5), the second reflection
Mirror (6), space bundling device (7), incident laser to be converted is imported and is expanded or shrink beam is hot spot half by inputting optical interface (1)
Footpath is the laser of ω, is divided into the orthogonal linearly polarized laser in two-way polarization direction, wherein one route is inclined after polarization beam apparatus (2)
The laser that shakes injects space bundling device (7) after the second reflecting mirror (6) reflection, and another route polarization laser first passes through reshaper (3)
Being transformed to inner circle radius is ω1Annular beam, then through the first reflecting mirror (4) reflection after enter rotation ripple device (5), described rotation ripple
Device (5) by the changeable direction of polarization of this annular beam be identical with first via polarization laser polarization direction after inject space bundling device
(7), closing bundle by two-way polarization direction identical Laser synthesizing by space is a branch of output.
2. a kind of light polarization compensation device closing beam system and beam shaping technology as claimed in claim 1 based on space, it is special
Levy and be: (7) install beam alignment correction device (8) additional after the bundling device of described space.
3. a kind of light polarization compensation device closing beam system and beam shaping technology as claimed in claim 2 based on space, it is special
Levy and be: after described beam alignment correction device (8), install Polarization Controller (9) additional.
4. a kind of light polarization compensation device closing beam system and beam shaping technology as claimed in claim 3 based on space, it is special
Levy and be: install output optical interface (10) after described Polarization Controller (9) additional.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011301.9A CN104503099B (en) | 2015-01-09 | 2015-01-09 | Light polarization compensation device based on beam shaping technology and space beam combination system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510011301.9A CN104503099B (en) | 2015-01-09 | 2015-01-09 | Light polarization compensation device based on beam shaping technology and space beam combination system |
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| Publication Number | Publication Date |
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| CN104503099A CN104503099A (en) | 2015-04-08 |
| CN104503099B true CN104503099B (en) | 2017-02-01 |
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| CN106825915B (en) * | 2017-03-28 | 2019-12-03 | 北京印刷学院 | The system and method for the pulse laser induced preparation pattern metal thin layer of transfer forward |
| JP7119094B2 (en) * | 2017-12-29 | 2022-08-16 | コアレイズ オーワイ | Laser processing apparatus and method |
| CN108173112A (en) * | 2018-02-23 | 2018-06-15 | 中国工程物理研究院激光聚变研究中心 | A kind of laser depolarization compensation device and application method |
| CN109212767B (en) * | 2018-09-30 | 2020-11-06 | 中国科学院长春光学精密机械与物理研究所 | Laser beam combining system |
| CN110412769B (en) * | 2019-07-12 | 2020-06-23 | 武汉锐科光纤激光技术股份有限公司 | Optical fiber laser beam combiner |
| CN113495374A (en) * | 2020-03-20 | 2021-10-12 | 中国科学院西安光学精密机械研究所 | Method and system for improving diffraction efficiency of acousto-optic tunable filter |
| CN111856890A (en) * | 2020-07-20 | 2020-10-30 | 中国科学院长春光学精密机械与物理研究所 | Focusing optical system and extreme ultraviolet light generating system |
| CN113466187B (en) * | 2021-04-12 | 2022-11-08 | 清华大学 | System and method for carrying out polarization super-resolution imaging on fluorescence anisotropy |
| CN113310670B (en) * | 2021-06-03 | 2022-10-11 | 中国科学院空天信息创新研究院 | Laser polarization beam combination measuring device |
| CN114498272A (en) * | 2021-12-16 | 2022-05-13 | 深圳大学 | Intermediate infrared vector vortex optical rotation generating device and method |
| CN115616792A (en) * | 2022-11-29 | 2023-01-17 | 天津凯普林激光科技有限公司 | Light beam shaping method, light beam shaping device and ultraviolet laser |
| CN117381212B (en) * | 2023-11-23 | 2024-05-10 | 江阴创可激光技术有限公司 | Laser processing device for emitting light of double lasers |
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