CN102891436A - Optical system and method for improving same - Google Patents
Optical system and method for improving same Download PDFInfo
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- CN102891436A CN102891436A CN2011102180471A CN201110218047A CN102891436A CN 102891436 A CN102891436 A CN 102891436A CN 2011102180471 A CN2011102180471 A CN 2011102180471A CN 201110218047 A CN201110218047 A CN 201110218047A CN 102891436 A CN102891436 A CN 102891436A
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- transmission medium
- light transmission
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4206—Optical features
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
- G02B19/0052—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode
- G02B19/0057—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a laser diode in the form of a laser diode array, e.g. laser diode bar
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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
- G02B27/10—Beam splitting or combining systems
- G02B27/12—Beam splitting or combining systems operating by refraction only
- G02B27/123—The splitting element being a lens or a system of lenses, including arrays and surfaces with refractive power
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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
- G02B27/10—Beam splitting or combining systems
- G02B27/12—Beam splitting or combining systems operating by refraction only
- G02B27/126—The splitting element being a prism or prismatic array, including systems based on total internal reflection
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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
- H01S5/02—Structural details or components not essential to laser action
- H01S5/022—Mountings; Housings
- H01S5/0225—Out-coupling of light
- H01S5/02251—Out-coupling of light using optical fibres
-
- 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
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4012—Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms
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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
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
- H01S5/4025—Array arrangements, e.g. constituted by discrete laser diodes or laser bar
- H01S5/4031—Edge-emitting structures
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4249—Packages, e.g. shape, construction, internal or external details comprising arrays of active devices and fibres
- G02B6/425—Optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Optical Couplings Of Light Guides (AREA)
- Semiconductor Lasers (AREA)
Abstract
The invention relates to an optical system and a method for improving the same. The optical system comprises a plurality of semiconductor laser transmitters and a coupling optical device, wherein each semiconductor laser transmitter is coupled to a fast shaft collimation optical device and a slow shaft collimation optical device in an operable manner so that light beams emitted by the semiconductor laser transmitters can be basically parallel; the fast shaft collimation optical device and the slow shaft collimation optical device are used for collimating the light beams emitted by the semiconductor laser transmitters; the coupling optical device is used for coupling the basically parallel light beams into an optical fiber; and the optical system also comprises one or more light pervious medium sheets which are arranged for translating at least one light beam in the basically parallel light beams before the basically parallel light beams reach the coupling optical device so that the total width of the basically parallel light beams reaching the coupling optical device can be decreased.
Description
Technical field
The present invention relates to high-power semiconductor laser emitter package field, relate in particular to reducing even eliminating of in high-power semiconductor laser emitter package light beam gap.
Background technology
The high-power semiconductor laser emitter package provides high power output and little volume, thereby so that it can be applied to a lot of fields well, these fields comprise: material processed, medicine equipment, telecommunications, printing etc.The semiconductor laser transmitter encapsulation can be coupled to the optical fiber that can be used as waveguide or laser cavity is provided for the optical-fiber laser reflector.
In some high-power semiconductor laser emitter packages, for example in many single transmit device encapsulation, each semiconductor laser transmitter that is ladder-like arranged, each semiconductor laser transmitter can comprise one or more laser diodes.Become collimated light beam from the light beam of each semiconductor laser transmitter after through fast axis collimation lens, slow axis collimating lens.In order to obtain high brightness and high coupling efficiency, these collimated light beams are arrived be used for combination two-way or the coupled lens of multichannel light beam more.When the reflector quantity that comprises in the encapsulation of many single transmit device is more, can arrange as shown in Figure 1 these reflectors, like this, arrive polarized light beam combining device (Polarization Beam Combiner from the light beam of top emitters with from the light beam of bottom emitter with orthogonal polarization direction, PBC) two corresponding planes of incidence close Shu Yihou through PBC and arrive coupled lens again.Fig. 2 and Fig. 3 illustrate other high-power semiconductor laser emitter package.In encapsulation shown in Figure 1, comprise ten reflectors, in encapsulation shown in Figure 2, comprise seven reflectors, in encapsulation shown in Figure 3, comprise three reflectors.
Because the tolerance that the difference between the mechanical tolerance of all parts in the encapsulation of many single transmit device, the light beam that each reflector sends and assembling process bring, generally when design, can preset the distance (equal width of light beam and add default light beam gap) between the beam center line, be the difference in height between the reflector ladder, default light beam gap is used for allowing these tolerances.When reflector, collimating lens (comprising fast axis collimation lens and slow axis collimating lens) and after may also having the assemblings such as speculum to finish, arrive between each light beam of coupled lens (in having the situation of PBC, arriving PBC) the gap for default light beam gap and actual tolerance sum or poor.This shows, the gap between each light beam is not pre-determined.Observing hot spot corresponding to each light beam by the hot spot monitor screen can find, before arriving coupled lens, (exist in the situation of PBC, before arriving PBC), there is gap g between the light beam from the adjacent semiconductor generating laser, shown in the first half of Fig. 4.
In the latter half of Fig. 4, mirror M 1, M2, M3 will reflex to coupled lens CL from light beam B1, B2, the B3 of semiconductor laser transmitter E1, E2, E3 respectively.Then coupled lens CL focuses on these collimated light beams among the optical fiber F of have a certain numerical aperture (Numeric Aperture, NA) and core diameter.
The gap that exists between the light beam causes lower brightness.In other words, in the situation that coupled lens has identical focusing length from the NA poor performance of the light of optical fiber output, for example, the angle of divergence of light is large, brightness is low.
The quantity of reflector increases and the end user wishes to keep preferably the NA performance (for example in many single transmit device encapsulation, the angle of divergence of light is less, brightness is higher), when less core diameter, higher coupling efficiency and less package dimension, light beam above-mentioned gap becomes key issue.
Therefore, need a kind of apparatus and method, reduce even eliminate from the gap between the light beam of adjacent semiconductor generating laser (to have in the situation of PBC, before arriving PBC) before arriving coupled lens at light beam.
Summary of the invention
For solving the above-mentioned problem, the invention provides a kind of optical system and for improvement of the method for optical system.
According to the present invention, realize light beam translation by utilizing the light transmission medium sheet, reduce even eliminate gap between each light beam thereby before light beam arrives coupled lens, (having in the situation of PBC, before arriving PBC).
The invention provides a kind of optical system, comprise: a plurality of semiconductor laser transmitters, each semiconductor laser transmitter in described a plurality of semiconductor laser transmitter operationally is coupled to fast axis collimation optics and the slow axis collimating optics device that collimates for the light beam to described semiconductor laser transmitter emission, so that the light beam of described a plurality of semiconductor laser transmitter emissions can become substantially parallel light beam; And coupling optical device, be used for described substantially parallel light beam coupling to optical fiber, wherein, described optical system also comprises one or more light transmission medium sheets, described one or more light transmission medium sheet is arranged to, before described substantially parallel light beam arrived described coupling optical device, at least one road light beam in the described substantially parallel light beam of translation can reduce so that arrive the overall width of the described substantially parallel light beam of described coupling optical device.
According to one or more embodiment of the present invention, described optical system also comprises a plurality of beam director, and each beam director in described a plurality of beam director operationally is coupled to slow axis collimating optics device so that the beam direction behind described slow axis collimating optics device collimation is arrived described coupling optical device.
According to one or more embodiment of the present invention, described one or more light transmission medium sheets are disposed between the corresponding beam director and described coupling optical device.
According to one or more embodiment of the present invention, described one or more light transmission medium sheets are arranged to immediately following after the beam director of correspondence.
According to one or more embodiment of the present invention, described a plurality of beam director are speculum.
According to one or more embodiment of the present invention, described one or more light transmission medium sheets are arranged to make described substantially parallel light beam to be positioned as close to but do not shear them.
According to one or more embodiment of the present invention, described one or more light transmission medium sheets scribble anti-reflective film.
According to one or more embodiment of the present invention, described one or more light transmission medium sheets are sheet glass.
According to one or more embodiment of the present invention, described a plurality of semiconductor laser transmitters are ladder-like arranged.
According to one or more embodiment of the present invention, each semiconductor laser transmitter in described a plurality of semiconductor laser transmitters comprises one or more laser diodes.
The present invention also provides a kind of method of improving optical system, described optical system comprises: a plurality of semiconductor laser transmitters, each semiconductor laser transmitter in described a plurality of semiconductor laser transmitter operationally is coupled to fast axis collimation optics and the slow axis collimating optics device that collimates for the light beam to described semiconductor laser transmitter emission, so that the light beam of described a plurality of semiconductor laser transmitter emissions can become substantially parallel light beam; And coupling optical device, be used for described substantially parallel light beam coupling to optical fiber, described method comprises: inserting step, in described optical system, insert one or more light transmission medium sheets, described one or more light transmission medium sheet is arranged to, before described substantially parallel light beam arrived described coupling optical device, at least one road light beam in the described substantially parallel light beam of translation can reduce so that arrive the overall width of the described substantially parallel light beam of described coupling optical device.
According to one or more embodiment of the present invention, described inserting step comprises: select step, select one road light beam to make it without described one or more light transmission medium sheets; And alignment procedures, described one or more light transmission medium sheets are carried out position alignment so that described substantially parallel light beam is positioned as close to but does not shear them.
According to one or more embodiment of the present invention, selected one road light beam is nethermost one road light beam.
According to one or more embodiment of the present invention, described alignment procedures comprises and moves up and down described one or more light transmission medium sheet and/or the described one or more light transmission medium sheet that tilts.
According to one or more embodiment of the present invention, described optical system also comprises a plurality of beam director, each beam director in described a plurality of beam director operationally is coupled to slow axis collimating optics device so that the beam direction behind described slow axis collimating optics device collimation is arrived described coupling optical device, described inserting step comprises: arrange described one or more light transmission medium sheets between the beam director of correspondence and described coupling optical device, preferably immediately following arrange described one or more light transmission medium sheet after the beam director of correspondence.
Because in the present invention by utilizing the light transmission medium sheet to realize light beam translation, thus total width of light beam can be significantly reduced, thereby be input to optical fiber light brightness and can significantly be increased from the brightness of the light of optical fiber output.In addition, realize light beam translation by utilizing the light transmission medium sheet, also so that the tolerance of speculum itself and installation thereof can be comparatively loose.
Description of drawings
By in conjunction with the following drawings, and with reference to following detailed description to embodiment, can more thorough understanding be arranged to the present invention.
Fig. 1-Fig. 3 illustrates some typical high-power semiconductor laser emitter packages.
Shown in Fig. 4 is the schematic diagram that has the gap between the light beam of adjacent semiconductor generating laser.
Shown in Fig. 5 is the schematic diagram of light beam after its corresponding mirror reflects from two adjacent semiconductor generating lasers that are ladder-like arranged in the many single transmit device encapsulation.
Shown in Fig. 6 is the in vertical direction schematic diagram of broadening of light beam.
Shown in Fig. 7 is to utilize according to one embodiment of present invention the light transmission medium sheet to realize the schematic diagram of light beam translation.
Shown in Fig. 8 is to utilize according to another embodiment of the invention the light transmission medium sheet to realize the schematic diagram of light beam translation.
Shown in Fig. 9 is the schematic diagram that calculates the light beam translation amount that realizes by the light transmission medium sheet.
Shown in Figure 10 is to utilize according to still another embodiment of the invention the light transmission medium sheet to realize the schematic diagram of light beam translation.
Shown in Figure 11 is the schematic diagram of the different hot spots constantly observed by the hot spot monitor screen according to one embodiment of present invention.
Shown in Figure 12 is the schematic diagram that the light transmission medium sheet is installed according to one embodiment of present invention.
Embodiment
By accompanying drawing, as an example rather than restriction embodiments of the invention as herein described are described.For illustrate succinct and clear for the purpose of, the element shown in the figure is not necessarily drawn in proportion.For example, for the sake of clarity, the size of some elements may be with respect to other element through amplifying.In addition, in the situation that think fit, repeat reference numerals in the accompanying drawing is to represent corresponding or similar element.Mentioning " embodiment " of the present invention or " embodiment " expression in the specification comprises at least one embodiment of the present invention in conjunction with the described specific features of this embodiment, structure or characteristic.Therefore, the appearance of word " in one embodiment " in each position of this specification differ establish a capital the expression same embodiment.
Shown in Fig. 5 is the schematic diagram of light beam after its corresponding mirror reflects from two adjacent semiconductor generating lasers that are ladder-like arranged in the many single transmit device encapsulation.As shown in Figure 5, semiconductor laser transmitter 501,503 lays respectively on heat sink 502,504, becomes collimated light beam after the light beam process fast axis collimation lens (not shown) of each semiconductor laser transmitter emission, the slow axis collimating lens (not shown).Speculum 505,506 respectively with the beam reflection behind semiconductor laser transmitter 501,503 the collimation to coupled lens (not shown), the distance 507 between the adjacent beams center line shown in Figure 5.
Just as previously mentioned, because the tolerance that the difference between the mechanical tolerance of all parts in the encapsulation of many single transmit device, the light beam that each reflector sends and assembling process bring, generally when design, can preset the distance between the beam center line, be the difference in height between the reflector ladder, be used for allowing these tolerances.When reflector, collimating lens (comprising fast axis collimation lens and slow axis collimating lens) and after may also having the assemblings such as speculum to finish, arrive between each light beam of coupled lens (in having the situation of PBC, arriving PBC) the gap for default light beam gap and actual tolerance sum or poor.This shows, the gap between each light beam of arrival coupled lens is not pre-determined.
Before arriving coupled lens at light beam, (having in the situation of PBC, before arriving PBC) reduce even eliminate from the gap between the light beam of adjacent semiconductor generating laser, the invention provides a solution: before the light beam of one of adjacent semiconductor generating laser emission arrives coupled lens, make first the suitable one or more light transmission medium sheets installed of its process to realize light beam translation at least.Requirement to the light transmission medium sheet is: light transmission rate is high, preferred area anti-reflective film or anti-reflection film, thereby so that because of light transmission medium sheet folded light beam with to absorb the power loss that light beam causes low as much as possible; Compare with air and to have larger refractive index, thereby can realize preferably light beam translation.In satisfying the light transmission medium sheet of above-mentioned requirements, glass is often selected because of the technique of its cheap cost and maturation, but the light transmission medium sheet is not limited in glass.
The light transmission medium sheet can be disposed between speculum and the coupled lens, and when having PBC, the light transmission medium sheet can be disposed between speculum and the PBC.The light transmission medium sheet guarantees that with the distance between the speculum the two can not contact.When distant between light transmission medium sheet and the speculum because beam divergence causes the light beam gap smaller, so the light transmission medium sheet for the light beam gap reduce in addition the effect of eradicating efficacy when comparing the two close together little.Shown in Fig. 6 is the in vertical direction schematic diagram of broadening of light beam.As shown in Figure 6, because broadening and the angle of divergence with certain angle be (for example in vertical direction for light beam, at 0.3 degree in the scope of 0.5 degree), so utilize the light transmission medium sheet to reduce even eliminate the gap between the adjacent beams and the optimal way that do not cut adjacent beams is to closely follow to arrange the light transmission medium sheet but not contact reflex mirror after speculum.
According to the light beam gap of estimating select to have suitable material, the light transmission medium sheet of suitable thickness, insert the light transmission medium sheet from a side (being generally the top) of speculum, then carry out position alignment so that light beam is positioned as close to and do not shear light beam.Position alignment mainly comprises and moves up and down the light transmission medium sheet and/or the light transmission medium sheet that tilts.During position alignment, for example with hot spot corresponding to each light beam of camera surveillance and/or for example monitor with power meter where gross power is to know the optimum position.Before inserting the light transmission medium sheet, can know the original gap between the light beam by monitoring hot spot.After inserting the light transmission medium sheet and regulating its position and angle, the effect that can know light beam translation by the supervision hot spot how.Can know by the gross power that monitors light beam after inserting the light transmission medium sheet whether the light transmission medium sheet has blocked adjacent light beam.
Recommendable is to leave nargin to avoid the light transmission medium sheet to shear light beam.Nargin refers to lean on too closely between light transmission medium sheet end face and adjacent beams, not only otherwise be in the light, also certain interval to be arranged, prevent that after device having been carried out residue operation (for example, baking etc.) light beam and light transmission medium sheet relative position some small variations occur and cause and are in the light.
According to the needs of concrete light path design, selected wherein a certain road light beam is directly walked, and namely this road light beam is without the light transmission medium sheet, and remainder light beam then utilizes the light transmission medium sheet to realize that translation comes near this road light beam.Because the gap between the adjacent beams is not predetermined, so can design the light transmission medium sheet of several satisfied different side-play amounts according to the light beam translation amount of expection requirement.
Shown in Fig. 7 is to utilize according to one embodiment of present invention the light transmission medium sheet to realize the schematic diagram of light beam translation.In this embodiment, have five road light beam B1, B2, B3, B4, B5 respectively through mirror M 1, M2, M3, M4, M5 reflection.According to the needs of concrete light path design, selected light beam B4 directly walks, and remainder light beam then utilizes the light transmission medium sheet to realize that translation comes near light beam B4.By not contacting with each speculum immediately following the light transmission medium sheet that after mirror M 1, M2, M3, M5, inserts respectively light transmission medium sheet T1, T2, T3, T5 and guarantee to insert, by the light beam of each mirror reflects when arriving coupled lens CL, its beam center is more close, beam broadening and overlapping each other each other, thereby can eliminate the gap between the adjacent beams.This can find out from the first half of Fig. 7, and shown in this part is before inserting the light transmission medium sheet and the afterwards corresponding hot spot of light beam of observing by the hot spot monitor screen.
Shown in Fig. 8 is to utilize according to another embodiment of the invention the light transmission medium sheet to realize the schematic diagram of light beam translation.In this embodiment, have three road light beam B1, B2, B3 respectively through mirror M 1, M2, M3 reflection.According to the needs of concrete light path design, selected light beam B2 directly walks, and remainder light beam then utilizes the light transmission medium sheet to realize that translation comes near light beam B2.As shown in Figure 8, by inserting light transmission medium sheet T1, T3 and guarantee that the light transmission medium sheet that inserts does not contact with each speculum between mirror M 1, M3 and the coupled lens CL, by the light beam of each mirror reflects when arriving coupled lens, its beam center is more close each other, thereby can effectively reduce the gap between the adjacent beams.This can find out from the first half of Fig. 8, and shown in this part is before inserting the light transmission medium sheet and the afterwards corresponding hot spot of light beam of observing by the hot spot monitor screen.
The calculating of light beam translation amount
Shown in Fig. 9 is the schematic diagram that calculates the light beam translation amount that realizes by the light transmission medium sheet, the sheet of light transmission medium shown in it T, incident beam B
In, outgoing beam B
OutWith light beam translation amount Δ h.Illustrate how to calculate the light beam translation amount that realizes by the light transmission medium sheet below in conjunction with Fig. 9.The translational movement that the light transmission medium sheet produces light beam and light beam are relevant with respect to these three factors of thickness of the optical index of the angle of light transmission medium sheet, light transmission medium sheet medium and light transmission medium sheet.
Light beam translation amount Δ h computing formula is as follows:
Δh＝sin(β-β`)*(d/cosβ`)
Wherein, β is the incidence angle of light beam from air to light transmission medium sheet medium: β=90 °-θ, and θ is the angle on incident beam and light transmission medium sheet surface;
β ` is the refraction angle: and β `=arcsin (sin (β)/n), wherein n is the optical index of light transmission medium sheet medium; And
D is the thickness of light transmission medium sheet.
As shown in table 1, when selection optical index n=1.55, thickness are 1000 microns light transmission medium sheet, if the angle theta on incident beam and light transmission medium sheet surface=75 °, the light beam translation amount Δ h=95.2 micron of then realizing by the light transmission medium sheet.
Table 1
Because the gap in the encapsulation of many single transmit device between the light beam of adjacent semiconductor generating laser is also non-isometric, some gap may be larger, and some gap may be less, therefore, need to select corresponding light beam translation amount according to different gap.For this reason, need to prepare the different light transmission medium sheet of thickness, and when each light transmission medium sheet is installed, adjust it with respect to the inclination angle of light beam when needed, to obtain needed light beam translation amount.
Shown in Figure 10 is to utilize according to still another embodiment of the invention the light transmission medium sheet to realize the schematic diagram of light beam translation.In this embodiment, have three road light beam B1, B2, B3.According to the needs of concrete light path design, selected light beam B3 directly walks, and remainder light beam then utilizes the light transmission medium sheet to realize that translation comes near light beam B3.By making light beam B1 through light transmission medium sheet T1, the T2 of approximately 1000 micron thick, approximately 16 degree inclinations and making light beam B2 through after the light transmission medium sheet T2, because approximately 100 microns translation has occured in each light transmission medium sheet, so the distance between the adjacent beams center line from approximately 300 microns be reduced to approximately 200 microns, thereby so that total width of light beam reduce.
In the situation that other configuration remains unchanged, reducing of the light beam overall width of arrival coupled lens will make the NA performance better, and for example the angle of divergence of optical fiber output beam is less, brightness is higher, and namely more a high proportion of power is exported in less numerical aperture.Perhaps, in the situation that keep identical NA performance, so that can reduce the focal length of coupled lens and slow axis collimating lens, thus can reduce package dimension.
Shown in Figure 11 is the schematic diagram of the different hot spots constantly observed by the hot spot monitor screen according to one embodiment of present invention.Shown in the 11A is viewed hot spot before light beam arrives the light transmission medium sheet, can find out, has the gap between the light beam.Shown in the 11B is through viewed hot spot after the light transmission medium sheet of suitable installation, can find out, the gap between the light beam is eliminated.Shown in the 11C is focusing length and the rear viewed hot spot of the distance between fast axis collimation lens and the coupled lens at the focusing length that has reduced coupled lens and slow axis collimating lens.
The installation of light transmission medium sheet
Because thereby the purpose of use light transmission medium sheet is to reduce even eliminate the light beam gap to make light beam adjacent to each other, therefore, generally can allow one road not translation of light beam, other light beam then utilize the light transmission medium sheet to realize that translation comes close to it.And because it is more easy and convenient and sufficient space is arranged that the light transmission medium sector-meeting is installed in the practical application from the top down, so can make nethermost one road light beam without translation, other light beam successively translation is downwards realized reducing of light beam gap even is eliminated.
Shown in Figure 12 is the schematic diagram that the light transmission medium sheet is installed according to one embodiment of present invention, and wherein power meter 1201 monitors gross power, and hot spot monitor screen 1202 monitors hot spot.Be encapsulated as example with the many single transmit device that comprises four single transmit devices, in this encapsulation, each semiconductor laser transmitter is launched one road light beam, totally four road light beams.As shown in figure 12, suppose that light transmission medium sheet T1 installs, installs light transmission medium sheet T2 now.At first, according to the gap length between the hot spot S2 that sees on the hot spot monitor screen and the S3, select to have the light transmission medium sheet of suitable thickness, be light transmission medium sheet T2.The large light transmission medium sheet of thickness is greatly then selected in the light beam gap, the little little light transmission medium sheet of thickness of then selecting in light beam gap.Then, mobile light transmission medium sheet T2 from top to bottom.Light transmission medium sheet T2 initial towards being to keep its lower surface direction parallel with light beam.The distance of light transmission medium sheet T2 and mirror M 3 guarantees that light transmission medium sheet T2 can not get final product by contact reflex mirror M3, though light transmission medium sheet T2 carry out certain Slope angle adjustment can contact reflex mirror M3 yet.Then, from the initial position light transmission medium sheet T2 that moves down.When light transmission medium sheet T2 incision light beam B1, can see that the gross power that monitors reduces on the one hand, can see that on the other hand hot spot S1 partly disappears.The light transmission medium sheet T2 that continues to move down can see that hot spot S1 continues to disappear, and hot spot S2 also may begin to disappear, and the gross power that monitors further reduces.Subsequently, hot spot S1 before this, then hot spot S2 below new position occur and become gradually complete, the gross power that monitors is also recovered gradually.After hot spot S1, S2 occur fully, illustrate that light transmission medium sheet T2 has passed completely through hot spot S1, S2.
Light transmission medium sheet T2 continues to move down.When finding that light transmission medium sheet T2 begins to shear hot spot S3, observe namely that hot spot S3 beginning disappears or gross power when beginning to reduce, begin the light transmission medium sheet (is for example upwards return certain distance from this position, 20 microns), this distance is to guarantee that light transmission medium sheet T2 can not shear the first nargin of light beam B3, write down the at this moment position of light transmission medium sheet T2, be called primary importance.
Continuation is from primary importance mobile light transmission medium sheet T2 and note displacement up, when finding that the disappearance of hot spot S2 beginning or the gross power that monitors reduce (this explanation light beam B2 begins to leak from the bottom of light transmission medium sheet T2), write down the at this moment position of light transmission medium sheet, be called the second place.Distance from the primary importance to the second place is designated as D1.
(1) if the second nargin that D1 approximates a certain setting (for example, 20 microns, this nargin is to guarantee that light beam B2 can not leak from the bottom surface of light transmission medium sheet T2), then move down light transmission medium sheet T2 and get back to primary importance, the final position of Here it is light transmission medium sheet T2, fixing light transmission medium sheet T2, installation.
(2) if D1 less than the second nargin of this setting, then will change the light transmission medium sheet with less thickness, and the institute of repetition front in steps.Can not change if have the light transmission medium sheet of less thickness, illustrate that then the light beam gap is too little, be not suitable for reducing the light beam gap with the light transmission medium sheet, namely not adopt the light transmission medium sheet herein.
(3) if D1 greater than the second nargin of this setting, then can judge according to the difference between D1 and the second nargin and will change thicker light transmission medium sheet or the inclination angle of needs rotation light transmission medium sheet T2, namely increase the angle between itself and light beam.If will rotate light transmission medium sheet T2, then according to the anglec of rotation that is estimated by D1, rotation light transmission medium sheet T2.And then repeat front institute in steps, until aforementioned two nargin namely the first nargin and the second nargin are suitable, fixing light transmission medium sheet T2, installation.
Because the light transmission medium sheet to the loss that the reflection of light beam causes, scribbles the antireflection plated film on the surface of light transmission medium sheet usually, the light transmission rate that can suppose to scribble the light transmission medium sheet of antireflection plated film here is 99.8% in order to reduce, and namely reflectivity is 0.2%.In addition, light beam is when light transmission medium sheet Propagation, because the light transmission medium sector-meeting absorbs light, so can cause absorption loss.But, because the absorptivity of light transmission medium sheet medium is low, the thickness of adding the light transmission medium sheet is generally very little, so absorption loss is quite little, can ignore here.The power loss that table 2 shows behind the insertion light transmission medium sheet is calculated.
Table 2
Here, power is normalized power, without unit.In table 2, suppose that the gross power before inserting the light transmission medium sheet is 1, and suppose that the power of each reflector is the same, then the power of each reflector is 0.2.Number of surfaces refers to that light beam passes the quantity on light transmission medium sheet surface.For example, if light beam passes a light transmission medium sheet, i.e. light beam totally two surfaces, front and back of having passed through this light transmission medium sheet, then number of surfaces is 2.The surface here refers to the interface of light transmission medium sheet medium and air dielectric in fact.As shown in table 2, the power loss behind the insertion light transmission medium sheet is about 0.5% of gross power.
Abovely by specific embodiment the present invention is described in detail, but the present invention is not limited to above-described embodiment.Without departing from the scope of the invention, can carry out various modifications and changes to the present invention.Scope of the present invention is limited by appended claims.
Claims (15)
1. optical system comprises:
A plurality of semiconductor laser transmitters, each semiconductor laser transmitter in described a plurality of semiconductor laser transmitter operationally is coupled to fast axis collimation optics and the slow axis collimating optics device that collimates for the light beam to described semiconductor laser transmitter emission, so that the light beam of described a plurality of semiconductor laser transmitter emissions can become substantially parallel light beam; And
The coupling optical device is used for described substantially parallel light beam coupling to optical fiber,
Wherein, described optical system also comprises one or more light transmission medium sheets, described one or more light transmission medium sheet is arranged to, before described substantially parallel light beam arrives described coupling optical device, at least one road light beam in the described substantially parallel light beam of translation can reduce so that arrive the overall width of the described substantially parallel light beam of described coupling optical device.
2. optical system as claimed in claim 1, wherein, described optical system also comprises a plurality of beam director, and each beam director in described a plurality of beam director operationally is coupled to slow axis collimating optics device so that the beam direction behind described slow axis collimating optics device collimation is arrived described coupling optical device.
3. optical system as claimed in claim 2, wherein, described one or more light transmission medium sheets are disposed between the corresponding beam director and described coupling optical device.
4. optical system as claimed in claim 3, wherein, described one or more light transmission medium sheets are arranged to immediately following after the beam director of correspondence.
5. such as each described optical system among the claim 2-4, wherein, described a plurality of beam director are speculum.
6. such as each described optical system among the claim 1-5, wherein, described one or more light transmission medium sheets are arranged to make described substantially parallel light beam to be positioned as close to but do not shear them.
7. such as each described optical system among the claim 1-6, wherein, described one or more light transmission medium sheets scribble anti-reflective film.
8. such as each described optical system among the claim 1-7, wherein, described one or more light transmission medium sheets are sheet glass.
9. such as each described optical system among the claim 1-8, wherein, described a plurality of semiconductor laser transmitters are ladder-like arranged.
10. such as each described optical system among the claim 1-9, wherein, each semiconductor laser transmitter in described a plurality of semiconductor laser transmitters comprises one or more laser diodes.
11. method of improving optical system, described optical system comprises: a plurality of semiconductor laser transmitters, each semiconductor laser transmitter in described a plurality of semiconductor laser transmitter operationally is coupled to fast axis collimation optics and the slow axis collimating optics device that collimates for the light beam to described semiconductor laser transmitter emission, so that the light beam of described a plurality of semiconductor laser transmitter emissions can become substantially parallel light beam; And the coupling optical device, being used for described substantially parallel light beam coupling to optical fiber, described method comprises:
Inserting step, in described optical system, insert one or more light transmission medium sheets, described one or more light transmission medium sheet is arranged to, before described substantially parallel light beam arrives described coupling optical device, at least one road light beam in the described substantially parallel light beam of translation can reduce so that arrive the overall width of the described substantially parallel light beam of described coupling optical device.
12. method as claimed in claim 11, wherein, described inserting step comprises:
Select step, select one road light beam to make it without described one or more light transmission medium sheets; And
Alignment procedures is carried out position alignment so that described substantially parallel light beam is positioned as close to but does not shear them to described one or more light transmission medium sheets.
13. method as claimed in claim 12, wherein, selected one road light beam is nethermost one road light beam.
14. such as claim 12 or 13 described methods, wherein, described alignment procedures comprises and moves up and down described one or more light transmission medium sheet and/or the described one or more light transmission medium sheet that tilts.
15. such as each described method among the claim 11-14, wherein, described optical system also comprises a plurality of beam director, each beam director in described a plurality of beam director operationally is coupled to slow axis collimating optics device so that the beam direction behind described slow axis collimating optics device collimation is arrived described coupling optical device, and described inserting step comprises:
Between the beam director of correspondence and described coupling optical device, arrange described one or more light transmission medium sheets, preferably immediately following after the beam director of correspondence, arranging described one or more light transmission medium sheet.
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| CN2011102180471A CN102891436A (en) | 2011-07-21 | 2011-07-21 | Optical system and method for improving same |
| PCT/CN2012/078796 WO2013010479A1 (en) | 2011-07-21 | 2012-07-18 | An optical system and a method for improving an optical system |
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|---|---|---|---|---|
| CN106253048A (en) * | 2016-08-30 | 2016-12-21 | 西安炬光科技股份有限公司 | A kind of high-power semiconductor laser system realizing uniform light spots |
| CN107196184A (en) * | 2014-10-28 | 2017-09-22 | 住友电气工业株式会社 | Using housing, optical component and the optical module and its assemble method that move beam device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017049555A (en) * | 2015-09-04 | 2017-03-09 | シャープ株式会社 | Optical device and projection device comprising the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6377410B1 (en) * | 1999-10-01 | 2002-04-23 | Apollo Instruments, Inc. | Optical coupling system for a high-power diode-pumped solid state laser |
| JP4188795B2 (en) * | 2003-10-07 | 2008-11-26 | リコー光学株式会社 | Optical power combining optical system and light source module |
| JP4739819B2 (en) * | 2005-05-31 | 2011-08-03 | リコー光学株式会社 | Light flux array density conversion method, light flux array density conversion member, and light source device |
| US20090122272A1 (en) * | 2007-11-09 | 2009-05-14 | Silverstein Barry D | Projection apparatus using solid-state light source array |
| CN201191323Y (en) * | 2007-11-09 | 2009-02-04 | 王仲明 | Construction integrating duplex splitted semiconductor laser into single optical fiber |
| CN201203679Y (en) * | 2007-12-27 | 2009-03-04 | 王仲明 | Structure for multipath semiconductor laser to couple into single optical fiber |
| CN101854031A (en) * | 2010-05-04 | 2010-10-06 | 长春德信光电技术有限公司 | Laser device for realizing semiconductor laser beam coupling of parallel plate prism combination |
-
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196184A (en) * | 2014-10-28 | 2017-09-22 | 住友电气工业株式会社 | Using housing, optical component and the optical module and its assemble method that move beam device |
| US10256601B2 (en) | 2014-10-28 | 2019-04-09 | Sumitomo Electric Industries, Ltd. | Optical module implementing with optical source, optical modulator, and wavelength detector, and a method to assemble the same |
| US10326253B2 (en) | 2014-10-28 | 2019-06-18 | Sumitomo Electric Industries, Ltd. | Optical module implementing with optical source, optical modulator, and wavelength detector, and a method to assemble the same |
| CN106253048A (en) * | 2016-08-30 | 2016-12-21 | 西安炬光科技股份有限公司 | A kind of high-power semiconductor laser system realizing uniform light spots |
| CN106253048B (en) * | 2016-08-30 | 2022-03-22 | 西安炬光科技股份有限公司 | High-power semiconductor laser system for realizing uniform light spots |
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