EP3172605A1 - Module de couplage d'une matrice de diodes lasers - Google Patents
Module de couplage d'une matrice de diodes lasersInfo
- Publication number
- EP3172605A1 EP3172605A1 EP15753971.9A EP15753971A EP3172605A1 EP 3172605 A1 EP3172605 A1 EP 3172605A1 EP 15753971 A EP15753971 A EP 15753971A EP 3172605 A1 EP3172605 A1 EP 3172605A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- module
- base
- holes
- laser
- laser diodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/208—Homogenising, shaping of the illumination light
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/06—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror
- G02B17/0605—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror using two curved mirrors
- G02B17/061—Catoptric systems, e.g. image erecting and reversing system using mirrors only, i.e. having only one curved mirror using two curved mirrors on-axis systems with at least one of the mirrors having a central aperture
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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
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
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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
- 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
- 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
- G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
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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
- G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
- G02B6/4236—Fixing or mounting methods of the aligned elements
- G02B6/4245—Mounting of the opto-electronic elements
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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
- G02B6/43—Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2066—Reflectors in illumination beam
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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
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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
- H01S5/023—Mount members, e.g. sub-mount members
- H01S5/02315—Support members, e.g. bases or carriers
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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
- H01S5/0233—Mounting configuration of laser chips
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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
- H01S5/0235—Method for mounting laser chips
-
- 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
- H01S5/024—Arrangements for thermal management
- H01S5/02407—Active cooling, e.g. the laser temperature is controlled by a thermo-electric cooler or water cooling
- H01S5/02423—Liquid cooling, e.g. a liquid cools a mount of the laser
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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
- H01S5/4012—Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms
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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
- G02B6/4266—Thermal aspects, temperature control or temperature monitoring
- G02B6/4268—Cooling
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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
- G02B6/4274—Electrical aspects
- G02B6/428—Electrical aspects containing printed circuit boards [PCB]
Definitions
- the present invention relates to the field of optics. It aims a coupling module of a matrix of laser diodes.
- the present invention finds a particularly advantageous, although in no way limiting, application in video projection devices.
- LCD pixels (acronym for the English expression "Liquid-Crystal Display”).
- the LCD pixels receivers of the light of said lamp, contain liquid crystals whose opacity can be varied by application of an electric current.
- the assessment of the quality of the video projection device is done with regard to criteria such as its noise level in operation, its size, or even the lifetime of the light source, all being weighed against the cost of manufacture.
- the present invention aims to overcome all or part of the disadvantages of the prior art, including those described above, by proposing a solution for having a coupling module of a matrix of laser diodes, compact form equipped with an optical system composed of conventional mirrors, and optimally concentrating the light emitted by said laser diodes into a region small enough for the resulting light to be exploited, for example, in an optical fiber.
- the invention relates to a module for coupling a matrix laser diode array, having a laser diode support base, a laser diode array adapted to emit laser beams, not necessarily at the same wavelength, to the outside of the base.
- the module comprises a Cassegrain optical system adapted to focus laser beams emitted by said array of laser diodes.
- the laser beams emitted by said laser diodes are focused in an area, corresponding to the second focus of said convex mirror, of very small or even punctual size (of the order of one hundred micrometers).
- the coupled light obtained at the output of the module can therefore be conveyed with a minimum of losses within an optical fiber or of another optical system.
- curved mirrors also makes it possible to reduce the manufacturing cost of the coupling module in that the curved convex and concave mirrors used are conventional, and therefore all the more so at a lower cost.
- Cassegrain optical system is further advantageous because it allows the realization of a compact form of coupling module through a reduced distance between the laser diodes and the focusing point of said Cassegrain system. Said distance is of the order of a few centimeters when other optics (lenses, concentrators, etc.) have a focal length of several tens of centimeters.
- the coupling module of a matrix of laser diodes may further comprise one or more of the following characteristics, taken separately or in any technically possible combination.
- the module for coupling a matrix of laser diodes comprises a convex type hyperbolic curved mirror and a concave type parabolic curved mirror, the two said mirrors forming the Cassegrain optical system.
- Cassegrain optical system composed of such so-called mirrors, is advantageous as regards the optimization of the optical convergence of laser beams, because: is adapted to use several wavelengths without the focal point corresponding to the second focus of the convex mirror being changed,
- the base comprises a set of holes adapted to receive collimators, each of said collimators being adapted to focus laser beams in a preferred direction.
- collimator-type optics is furthermore advantageous because it allows the divergence of said laser beams to be minimized.
- the base comprises a set of holes adapted to circulate a cooling liquid, said coolant being adapted to maintain a constant temperature of the array of laser diodes.
- the coolant flows through a flow network, the assembly consisting of said coolant and said flow network forming a cooling system, which may comprise several sub-units. cooling systems.
- the base comprises a PCB adapted to supply electricity to the array of laser diodes.
- the module comprises a laser beam collection system, positioned at the focusing point of the Cassegrain optical system.
- the collection system comprises a connector, corresponding to IEC standards, adapted to accommodate an optical fiber.
- the collection system comprises an optical system adapted to perform a coupling to an optical fiber or other optical system.
- FIG. 1 a schematic 3D representation of an embodiment of a device (10) for coupling module of a matrix of laser diodes.
- FIG. 2 a schematic 2D representation of a sectional view of an embodiment of a device (10) of a coupling module of a matrix of laser diodes.
- FIG. 4 an output image, obtained by numerical simulation, of an exemplary non-optimized embodiment of a device (10) for a module for coupling a matrix of laser diodes.
- FIG. 5 an output image, obtained by numerical simulation, of an exemplary embodiment, optimized, a device (10) of a coupling module of a matrix of laser diodes.
- the present invention finds its place in the field of video projection.
- FIG. 1 and FIG. 2 schematically represent an exemplary embodiment of a module (10) for coupling a matrix of laser diodes, and respectively correspond to a 3D representation of an outside view of said module (10). , and a 2D representation of a sectional view of said module (10).
- Said module (10) is used, by way of non-limiting example, by a video projection system (not shown).
- Said video projection system is, for example, a cinematographic projector using as lasers only light sources.
- the module (10) for coupling a matrix of laser diodes comprises a base (1 1) for supporting the laser diodes.
- an axis Z relative to this module (10) for coupling a matrix of laser diodes is defined.
- Said axis Z has a direction normal to the plane on which the base (1 1) rests, and is oriented from said plane towards the base (1 1), it being understood that the direction of upward movement corresponds to the orientation direction of the Z axis.
- Said Z axis is represented, by way of non-limiting example, in FIGS. 1 and 2.
- the base (1 1) comprises three plates (1 10), (1 1 1) and (1 12), not necessarily equal volumes, integral between them and with the base (1 1), and superimposed on each the others, so that said plate (1 1 1) is between the plates (1 10) and (1 12), and that said plate (1 12) bears on the plane on which said base (1 1) rests .
- Said plates (1 10), (1 1 1) and (1 12), as well as the base (1 1) have several faces, in particular so-called lateral faces corresponding to the faces having a normal orthogonal to the Z axis.
- Each of said plates (1 10), (1 1 1) and (1 12) has a number of lateral faces greater than or equal to the number of lateral faces of said base (1 1).
- said plates (1 10), (1 1 1) and (1 12) are superimposed so that their lateral faces, having a normal of the same direction and of the same direction, are coplanar, and that each of said coplanar faces is in contact with a lateral face of said base (1 1).
- the base (1 1), as well as the plates (1 10), (1 1 1) and (1 12) are rigid and made by machining metal materials.
- said machining is performed from a piece of aluminum.
- the machining of the base (1 1), as well as plates (1 10), (1 1 1) and (1 12), is made from a piece of copper.
- the use of such a metal is advantageous because of the increase in the heat transfer capacity of the various parts of the module (10), but is not considered preferential because of its cost.
- the base (1 1), and the plates (1 10) and (1 1 1) are rectangular parallelepiped shape.
- the plate (1 12) is obtained from an initial rectangle rectangular plate, to which has been removed a secondary rectangular parallelepiped plate, and contained in said initial plate so that the lower face of said secondary plate is contained in the face lower of said initial plate.
- the underside of said secondary plate is centered with respect to the underside of said initial plate.
- the base (1 1) and the plate (1 10) comprise a common upper face (12), which is necessarily planar and orthogonal to the Z axis, and having a set of holes (13), said assembly being centered with respect to said upper face (12).
- Said holes (13) pass across the plate (1 10), each having a lower hole and an upper hole, not physically separated, and respectively bearing on the lower and upper faces of the plate (1 10).
- Said upper hole of a said hole (13) is of cylindrical shape, of axis of revolution parallel to the axis Z.
- said upper hole of a hole (13) is based on an upper disk contained in the upper face (12), and a lower disc, centered with respect to the lower hole of said hole (13), and strictly contained in said lower hole.
- the upper disk of an upper hole of a hole (13) is referenced as the upper disk of said hole (13).
- said matrix grating is obtained from a square composed of twenty five holes.
- Said square is constructed such that each of its sides has five regularly spaced holes (13), each end of one of said sides being the center of one of the upper disks of said five holes.
- the other holes are five regularly spaced holes (13), each end of one of said sides being the center of one of the upper disks of said five holes.
- the matrix network is obtained by depriving the square of twenty five holes of its central element, that is to say the hole (13) whose upper disk is centered on the point of intersection of the diagonals of said square.
- the formed square matrix network through the holes (13) is of size n 2 -p 2 :
- n being a natural number strictly greater than 2
- Said matrix grating is then obtained from a first square composed of n 2 regularly spaced holes which is removed p 2 regularly spaced holes forming a second square, the axes of symmetry of said second square being merged with those of said first square.
- the holes (13) are adapted to accommodate collimating optics, said collimators (131), each of said collimators (131) being adapted to focus laser beams in a preferred direction.
- Said collimators (131) rest on a base adapted to fit into the lower holes of said holes (13).
- the collimators (131) placed in the holes (13) are adapted to deflect laser beams coming from the bottom of the plate (1 10), so that the laser beams resulting are parallel to the Z axis, and directed towards the top of the base (1 1).
- the holes (13) are not all identical, differing in size from their respective lower and upper holes, so that the collimators (131) placed in said holes (13) are not all identical.
- the plate (1 1 1) has a set of holes (20), each of said holes (20) being located vis-à-vis a single hole (13). Said holes (20) pass on both sides of the plate (1 1 1), each having a lower hole, an upper hole, and an intermediate hole, not physically separated, and arranged so that said intermediate hole is between said lower and upper holes. In addition, said lower and upper holes are respectively supported on the lower and upper faces of the plate (11 1). Said intermediate hole of a said hole (20) is of cylindrical shape, of axis of revolution parallel to the Z axis and coincides with the axis of revolution of the upper hole of the hole (13) located vis-à-vis. In particular, said intermediate hole of a hole (20) is based on lower and upper disks respectively centered with respect to said lower and upper holes of said hole (20), and strictly contained therein.
- the upper holes of the holes (20) are arranged so that the base of the collimators (131) is embedded therein.
- the upper holes of the holes (20) and the lower holes of the holes (13) are adapted to maintain by compression, between the plates (1 10) and (1 1 1), and along the Z axis, the collimators (131) in a fixed position.
- the collimators (131) are glued to said plates (1 10) and (1 1 1) .
- the holes (20) are adapted to receive an array of laser diodes (201), said diodes being arranged to emit laser beams, not necessarily at the same wavelength, and in a preferential direction, towards the outside of the base (1 1), or towards the top of the module (10). Said diodes (201) rest on a base adapted to fit into the lower holes of said holes (20).
- the diodes (201) placed in the holes (20) are adapted to deflect laser beams coming from the bottom of the plate (1 1 1), so that the resulting laser beams are parallel to the Z axis, and directed towards the top of the base (1 1).
- the laser diodes are of the type known under the name T056. These diodes are characterized by a base on which they support, with a diameter of 5.6 mm and a spectrum of emission that can go from the ultraviolet to the infrared.
- the laser diodes are of the type known under the name T09. These diodes are characterized by a base on which they support, with a diameter of 9mm and a spectrum of emission that can go from the ultraviolet to the infrared.
- the holes (20) are not all identical, differing in size from their lower, intermediate holes. and respective upper ones, so that the diodes (201) placed in said holes (13) are not all identical.
- the plate (1 12) has a set of holes (30), each of said holes (30) being located opposite a single hole (20). Said holes (30) pass across the plate (1 12), each having a lower hole and an upper hole, not physically separated, and respectively bearing on the lower and upper faces of the plate (1 12 ). Said lower hole of a said hole (30) is of cylindrical shape, of axis of revolution parallel to the Z axis and coincides with the axis of revolution of the intermediate hole of the hole (20) located vis-à-vis . In particular, said lower hole of a hole (30) is based on an upper disk, centered with respect to the upper hole of said hole (30), and strictly contained in said upper hole.
- the upper holes of the holes (30) are arranged so that the base of the diodes (201) is embedded therein.
- the upper holes of the holes (30) and the lower holes of the holes (20) are adapted to maintain by compression, between the plates (1 1 1) and (1 12), and along the Z axis, the diodes (201) in a fixed position.
- the lower hole of each hole (30) is advantageously configured so that the anode and the cathode of each diode, maintained by compression between the plates (1 1 1) and (1 12), lodge there .
- the diodes (201) are glued to said plates (1 1 1) and (1 12) .
- the plate (1 12) also comprises, on at least one of its lateral faces, a set of holes (31) adapted to circulate within said plate (1 12), from the outside of the base ( 1 1), a coolant.
- Said coolant is adapted to maintain at a constant temperature the array of laser diodes placed in the holes (30).
- the flow of said coolant is effected through a flow network (not shown in Figure 2), the assembly consisting of said coolant and said flow network forming a cooling system.
- the number of holes (31) is greater than or equal to two, so that at least one of said two holes (31) constitutes the inlet, from the outside towards the inside of the base (1 1 ), the cooling system and at least one of said two holes (31) is the output, from the inside to the outside of the base (1 1), of the cooling system.
- the holes (31), six in number, are cylindrical in shape, have an axis of revolution orthogonal to the lateral face through which they are hollowed out, and for base discs.
- the outer disk of a hole (31) is that contained in the outer lateral face (22).
- Said cylindrical holes (31) are regularly spaced, and arranged so that the centers of the disks serving as their base are aligned along a straight line parallel to the side of the square upper face (12) on which said lateral face rests.
- the coolant of the cooling system is water. None precludes, according to other non-detailed examples, having other liquids.
- Figure 3 schematically shows a bottom view of an exemplary embodiment of the cooling system, mentioned above, the base (1 1).
- the flow network of the cooling system consists of pipes. Said pipes form two cooling subsystems (32) and (33) not communicating with each other, and adapted to circulate the cooling liquid around the holes (30) of the plate (1 12).
- Each cooling subsystem (32) or (33) has an inlet / outlet system formed by two cylindrical holes (31), one being adapted to bring coolant into the interior of the base ( 1 1), and the other being adapted to bring out the coolant outside the base (1 1).
- the base (1 1) also comprises a PCB (40) (acronym for the English expression "Printed circuit board”), adapted to supply electricity to the array of laser diodes (201) placed in the holes (20).
- Said PCB (40) is further adapted to be embedded in the underside of the base (1 1) so that it is in contact with the plate (1 12).
- the PCB (40) is a rigid printed circuit.
- the PCB (40) is a flexible printed circuit.
- said PCB (40) comprises means for holding in a fixed position the anodes and cathodes of the diodes (201) placed in the holes (20).
- the means for holding the anodes and cathodes of the diodes (201) placed in the holes (20) in a fixed position are a set of holes (41), adapted to receive said anodes and said cathodes, and passing through the PCB plate (40) on both sides.
- the anodes and the cathodes, passing through said holes (41) of the PCB (40) are soldered to the PCB (40), the welding being performed at the lower face of said PCB (40).
- Such a configuration is advantageous for maintaining the PCB (40) in contact with the plate (1 12). None prevents, according to other non-detailed examples, to have other means for holding the PCB (40) in contact with the plate (1 12).
- the module (10) for coupling a matrix of laser diodes comprises a convex type hyperbolic curved mirror (14).
- Said convex mirror (14) has an optical axis parallel to the Z axis, and a surface consisting of a hyperboloid, vertex facing upwardly of the module (10).
- said hyperboloid is supported on a disk, said disk forming the base of said convex mirror (14) and is centered on the upper face (12) of the plate (1 10).
- Said convex mirror (14) further has two foci, the first focus being located below the base of the mirror, and the second focus being located above said hyperboloid.
- the module (10) for coupling a matrix of laser diodes comprises a parabolic curved mirror of the concave type (15).
- Said concave mirror (15) is perforated at its optical center, has an optical axis parallel to the Z axis, and a surface consisting of a vertex paraboloid facing downwards of the module (10).
- Said concave mirror (15) further has a single focus located below said paraboloid.
- the concave (15) and convex (14) mirrors form an optical system called "Cassegrain".
- the concave (15) and convex (14) mirrors have a relative position adapted to coincide, their respective optical axes, the single focus of the concave mirror (15) with the first focus of the convex mirror (14), and so that the second focus of the optical mirror (14) is located above the concave mirror (15).
- Said Cassegrain optical system is adapted to focus, at a focusing point corresponding to the second focus of the convex mirror (14), laser beams emitted by laser diodes, parallel to the Z axis above the base (1 1) .
- the disk of the base of the convex mirror (14) is centered on the point of intersection of the diagonals of the square formed by the upper face (1 2).
- said convex mirror (14) is embedded and glued on said upper face (12).
- the concave mirror (15) is held above the convex mirror (14), so as to form a Cassegrain system as described above, by four rods (16) all parallelepiped identical, rigid and made by machining aluminum .
- Said rods (16) have a longitudinal axis parallel to the Z axis, each being supported by a distinct side of the upper face (12).
- the section of a rod (16) by a plane containing the upper face (12) is a rectangle, strictly contained in the upper face (12), and centered along the side of the upper face (12) supporting said rod (16).
- rods (16) made by machining a piece of metal other than aluminum. More generally, nothing excludes, according to other non-detailed examples, having other mechanical systems making it possible to keep the concave mirror (15) away from the convex mirror (14), so that said concave mirror (15) ) and said convex mirror (14) form a Cassegrain system.
- a Cassegrain optical system is advantageous as regards the optimization of the optical convergence of laser beams derived from laser diodes (201). If the relative position of the concave (15) and convex (14) mirrors is a decisive criterion in the ability of the Cassegrain system to couple, by limiting the light losses, said laser beams, the geometrical parameters of said mirrors are equally fundamental.
- FIG. 4 and FIG. 5 represent output images, obtained by numerical simulation, of non-optimized and optimized embodiments of a device (10) for coupling a matrix of laser diodes.
- the concave (15) and convex (14) mirrors are configured so that their conical constant is zero, in other words said mirrors are spherical, but as they always form a system Cassegrain.
- the device (10) of a laser diode matrix coupling module comprises a laser beam collection system, positioned at the focusing point of the Cassegrain system, and adapted to collect the beams. laser diodes (201) focused by the Cassegrain optical system.
- said collection system comprises a fiber optic connector complying with the IEC standards (acronym for "International Electrotechnical Commission”).
- the collection system comprises an SMA connector (18) adapted to receive an optical fiber.
- Said SMA connector is embedded in a square plate (17), orthogonal to the Z axis, and located above the concave mirror (15).
- Each of the sides of said square plate (17) is further supported by contact with a rod (16), so as to maintain said plate (17) in a fixed position. More particularly, said contact is effected between said plate (17) and the faces of the rods (16), of larger area, and normal facing inwards of the upper face (12).
- said collection system comprises an optical system, said optical system comprising a non-limiting number of parts, said parts being adapted to subject laser beams to one or any combination of the following actions: reflection, refraction, diffusion, diffraction, filtering.
- said optical system is adapted to perform a coupling to an optical fiber or other optical system.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Semiconductor Lasers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1457218A FR3024244B1 (fr) | 2014-07-25 | 2014-07-25 | Module de couplage du matrice de diodes lasers |
PCT/FR2015/052038 WO2016012724A1 (fr) | 2014-07-25 | 2015-07-23 | Module de couplage d'une matrice de diodes lasers |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3172605A1 true EP3172605A1 (fr) | 2017-05-31 |
Family
ID=52273221
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15753971.9A Withdrawn EP3172605A1 (fr) | 2014-07-25 | 2015-07-23 | Module de couplage d'une matrice de diodes lasers |
Country Status (4)
Country | Link |
---|---|
US (1) | US20170160629A1 (fr) |
EP (1) | EP3172605A1 (fr) |
FR (1) | FR3024244B1 (fr) |
WO (1) | WO2016012724A1 (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6613957B2 (ja) * | 2016-02-26 | 2019-12-04 | 株式会社島津製作所 | レーザ装置 |
WO2018020644A1 (fr) * | 2016-07-28 | 2018-02-01 | Necディスプレイソリューションズ株式会社 | Dispositif de source lumineuse, dispositif d'affichage par projection et procédé de refroidissement d'un élément électroluminescent à semi-conducteurs |
WO2018045597A1 (fr) * | 2016-09-12 | 2018-03-15 | Xiamen Chaoxuan Photoelectric Technology Co., Ltd. | Système et dispositif à éclairage par réseau laser |
JP6658712B2 (ja) * | 2017-10-25 | 2020-03-04 | セイコーエプソン株式会社 | プロジェクター |
US11402617B2 (en) | 2018-07-12 | 2022-08-02 | Clark Wagner | System and method for generating white light for projectors |
CN109283781B (zh) * | 2018-11-23 | 2023-10-03 | 中山联合光电科技股份有限公司 | 基于孔径压缩的投影仪光源装置 |
WO2020135497A1 (fr) * | 2018-12-26 | 2020-07-02 | Xiamen Chaoxuan Photoelectric Technology Co., Ltd. | Système et dispositif à éclairage à barrette laser |
USD941894S1 (en) * | 2020-06-11 | 2022-01-25 | Panasonic intellectual property Management co., Ltd | Laser beam-combining engine with beam-shaping module |
USD941895S1 (en) * | 2020-06-11 | 2022-01-25 | Panasonic intellectual property Management co., Ltd | Laser beam-combining engine with fiber optic module |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6118579A (en) * | 1998-04-04 | 2000-09-12 | Endemann; Thomas R. | Planetary astrographic telescope |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5301249A (en) * | 1992-12-31 | 1994-04-05 | Eastman Kodak Company | Catoptric coupling to an optical fiber |
JP3212063B2 (ja) * | 1995-03-08 | 2001-09-25 | 日本電信電話株式会社 | 光レセプタクル |
JP2006032812A (ja) * | 2004-07-21 | 2006-02-02 | Yokogawa Electric Corp | 光源装置 |
FR2940472B1 (fr) * | 2008-12-24 | 2011-03-18 | Commissariat Energie Atomique | Couplage optique entre un collecteur optique de telescope et un recepteur |
US8165434B2 (en) * | 2009-03-17 | 2012-04-24 | LumenFlow Corp. | High efficiency optical coupler |
US8923679B2 (en) * | 2010-06-03 | 2014-12-30 | Lockheed Martin Corporation | Method and phase-change gain-fiber holder that control temperature rise and uniformity with minimal stress |
GB2495774A (en) * | 2011-10-21 | 2013-04-24 | Barco Nv | Laser diode grid element comprised of standard laser diodes on a heat exchange plate and PCB |
DE102011085978A1 (de) * | 2011-11-09 | 2013-05-16 | Osram Gmbh | Laser-leuchtstoff-vorrichtung mit laserarray |
DE102014205452A1 (de) * | 2014-03-24 | 2015-09-24 | Osram Gmbh | Lichtquellenanordnung mit einer Mehrzahl von Halbleiterlaserlichtquellen |
-
2014
- 2014-07-25 FR FR1457218A patent/FR3024244B1/fr active Active
-
2015
- 2015-07-23 US US15/328,013 patent/US20170160629A1/en not_active Abandoned
- 2015-07-23 EP EP15753971.9A patent/EP3172605A1/fr not_active Withdrawn
- 2015-07-23 WO PCT/FR2015/052038 patent/WO2016012724A1/fr active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6118579A (en) * | 1998-04-04 | 2000-09-12 | Endemann; Thomas R. | Planetary astrographic telescope |
Also Published As
Publication number | Publication date |
---|---|
US20170160629A1 (en) | 2017-06-08 |
FR3024244B1 (fr) | 2018-01-05 |
FR3024244A1 (fr) | 2016-01-29 |
WO2016012724A1 (fr) | 2016-01-28 |
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