WO2011054603A2 - Source de lumière - Google Patents

Source de lumière Download PDF

Info

Publication number
WO2011054603A2
WO2011054603A2 PCT/EP2010/064302 EP2010064302W WO2011054603A2 WO 2011054603 A2 WO2011054603 A2 WO 2011054603A2 EP 2010064302 W EP2010064302 W EP 2010064302W WO 2011054603 A2 WO2011054603 A2 WO 2011054603A2
Authority
WO
WIPO (PCT)
Prior art keywords
light
photodetector
light source
scattered
fiber
Prior art date
Application number
PCT/EP2010/064302
Other languages
German (de)
English (en)
Other versions
WO2011054603A3 (fr
Inventor
Klaus Stoppel
Karl-Heinz Nuebel
Hans-Jochen Schwarz
Manfred Vogel
Andreas Letsch
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2011054603A2 publication Critical patent/WO2011054603A2/fr
Publication of WO2011054603A3 publication Critical patent/WO2011054603A3/fr

Links

Classifications

    • 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
    • G02B6/4202—Packages, e.g. shape, construction, internal or external details for coupling an active element with fibres without intermediate optical elements, e.g. fibres with plane ends, fibres with shaped ends, bundles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P17/00—Testing of ignition installations, e.g. in combination with adjusting; Testing of ignition timing in compression-ignition engines
    • F02P17/12—Testing characteristics of the spark, ignition voltage or current
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P23/00—Other ignition
    • F02P23/04—Other physical ignition means, e.g. using laser rays
    • 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
    • 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
    • G02B6/4286—Optical modules with optical power monitoring
    • 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/0627—Construction or shape of active medium the resonator being monolithic, e.g. microlaser
    • 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/0619—Coatings, e.g. AR, HR, passivation layer
    • H01S3/0621—Coatings on the end-faces, e.g. input/output surfaces of the laser light
    • 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/094049—Guiding of the pump light
    • H01S3/094053—Fibre coupled pump, e.g. delivering pump light using a fibre or a fibre bundle
    • 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
    • H01S3/09415—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode the pumping beam being parallel to the lasing mode of the pumped medium, e.g. end-pumping
    • 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
    • H01S3/1123—Q-switching
    • H01S3/113—Q-switching using intracavity saturable absorbers
    • 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
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
    • H01S3/1312—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the optical pumping
    • 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
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • 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

Definitions

  • the invention relates to a light source according to the preamble of the independent
  • Such a light source is known from DE 102004 006 932 B3 and has a diode laser bar with a plurality of narrow emitters, which are arranged in a row next to each other in the direction of their longitudinal axis.
  • the diode laser bar is a device for beam guidance and beam shaping emerging from it
  • arranged optical fibers contains, in which couples the laser beam.
  • the invention provides such a device, in particular a device is provided which is particularly robust, can be manufactured inexpensively and is able to provide particularly high-quality information.
  • the invention is based on the observation that in light sources after the
  • Such a process excited by the emission of the light source may be, for example, the generation of a laser pulse by a laser device excited by the light source or the ignition of a combustion in an internal combustion engine.
  • the invention is further based on the finding that this scattered light can be supplied to a photodetector in a particularly simple manner, the suitable Location, in particular in the vicinity of the area in which a transition of light between a diode laser and a light guide, in particular 5mm or less spaced from this area, is arranged. The transition of light from the diode laser in the light guide takes place in
  • Intensity distribution of the radiation generated by the diode laser is carried out to a predetermined by the light guide lateral intensity distribution. In general, this transition occurs along the direction of propagation of the radiation generated by the diode laser front 10mm or the front 20mm of the light guide.
  • a photodetector is to be understood in a broad sense as an instrument for detection, in particular for optoelectrical conversion, of light, for example a photodetector may comprise a photodiode, a CCD camera
  • bolometric sensor or a photomultiplier or comprise one or more such components each single or multiple.
  • the diode laser comprises a plurality of emitters and the light guide comprises a plurality of optical fibers (hereinafter also referred to as fibers) and each fiber has a first end, wherein in a further advantageous embodiment of the invention, the first ends of such Emitters are arranged that coupled by the emitter light into the first ends of the optical fibers, wherein the light source comprises a photodetector for detecting light that is scattered in the transition from the emitters in the first ends. It is understood that the photodetector is arranged for this purpose at a suitable location, in particular in the region of the first ends of the optical fibers, in particular 5 mm or less spaced from the first ends of the optical fibers.
  • each fiber has a side surface and the fibers are arranged at least in the region of their first ends along their side surfaces in abutment.
  • a first end of an optical fiber is to be understood as meaning an end of an optical fiber in the direction of its longitudinal axis, for example in the case of a cylindrical fiber a base surface of the cylinder.
  • a lateral surface of an optical fiber is to be understood as meaning the surface which delimits an optical fiber perpendicular to its longitudinal axis, for example, in the case of a cylindrical fiber, the lateral surface of the cylinder.
  • Optical fibers which are butted along their side surfaces are understood to be optical fibers, all or almost all of which, for example, more than 90% of the optical fibers, contact immediately adjacent optical fibers along their side surfaces.
  • scattered light is meant in particular light that emerges from an optical fiber through the side surface of the optical fiber, thus traversing the fiber cladding, in particular in the range of also referred to as cross-sectional transducers, encompassed by the light guide means in which a transition of the lateral intensity distribution of the Diode laser generated radiation takes place on a predetermined by the light guide lateral intensity distribution.
  • scattered light in the sense of this application is pronounced as diffuse, non-directional or substantially non-directional light, which occurs in particular in the surroundings of the light source.
  • the reproducibility of the scattered light improves when the fibers are connected in the region of their first ends with a preferably transparent fiber carrier or are even arranged in the region of their first ends between two preferably transparent fiber carriers.
  • a preferably transparent fiber carrier or are even arranged in the region of their first ends between two preferably transparent fiber carriers.
  • the photodetector is in direct contact with, or spaced from, the fiber carrier by 5mm or less. It may be that the scattered light reaching the photodetector without further
  • Measures does not reach the desired intensity. It is therefore advantageous to have a means for Increase the scattered light intensity from which the photodetector is hit, provide and / or provide a means for imaging the scattered light on the photodetector.
  • scattered light An illustration of scattered light is understood here to mean that the scattered light, in particular previously scattered, or at least parts of the scattered light, in particular previously scattered, undergo a significant change in direction during the imaging, in particular by reflection at flat or curved surfaces or by refraction at curved surfaces.
  • the transmission through a thin plane-parallel disc is not to be understood as imaging within the meaning of the invention, since in this case a significant change in direction of the scattered light does not occur altogether.
  • the means for increasing the intensity of scattered light from which the photodetector is struck and / or the means for imaging scattered light on the photodetector are made in one piece with the light-guiding device, and in particular a mirroring of an outer surface of one or more fiber carriers and / or a curved outer surface of one or more fiber carrier.
  • the reflective coating and / or a mirrored curved outer surface is located completely or partially on an outer surface of one or more fiber carriers facing away from the photodetector. Transmitting, curved outer surfaces of one or more
  • fiber carriers are preferably located completely or partially on an outer surface of one or more fiber carriers facing the photodetector.
  • At least one further optical component which may in particular be made in one piece with the light-conducting device, in particular a light guide which is shaped such that it reflects scattered light by multiple reflection onto the photodetector or lenses, in particular Fresnel lenses.
  • a Fresnel lens is applied on the outer surface of the fiber carrier.
  • Other structures for increasing the scattered light intensity from which the photodetector is hit and / or for imaging scattered light onto the photodetector can also be advantageously applied to the outer surface of the fiber carrier.
  • the means for increasing the amount of scattered light from which the photodetector is struck and / or the means for imaging scattered light on the photodetector may be a gel disposed in a space between one or more fiber carriers or optical fibers and the photodetector , This improves the light conduction, reduces reflections and refractions in the light path, especially when the optical gel has a refractive index of about 1.3 to 1.7.
  • the light source contains at least one fluorescent substance which, in the transition from the diode laser in the
  • Light guide is scattered light, wherein resulting from the photodetector fluorescent light is detected.
  • This advantageously makes it possible to use even those photodetectors whose spectral sensitivity is low for the scattered light and higher for the fluorescent light.
  • Far-reaching functional improvements can be achieved if the light source comprises a plurality of photodetectors which are arranged at substantially different locations from one another and / or have a significantly different spectral sensitivity, in particular in combinations with the above-described measures, in particular one or more of the measures described above one, several or all of the photodetectors covered by the light source can relate.
  • Substantially different locations in the sense of the invention may be, for example, locations that are more than 5 or more than 15 mm apart, or locations whose spacing is greater than half the maximum extent of
  • Photodetectors having a substantially different spectral sensitivity can be realized by the corresponding maxima of the spectral sensitivity (current per light power) occurring at wavelengths that differ by 100 nm or more or 300 nm or more.
  • Drawing Figure 1 shows a schematic representation of an internal combustion engine with a laser ignition device according to the invention.
  • FIG. 2 shows a laser ignition device in detail.
  • Figures 3a, 3b, 3c and 3d show a first embodiment of a light source according to the invention.
  • FIGS. 4a, 4b, 4c and 4d show further embodiments according to the invention
  • An internal combustion engine carries in Figure 1 in total the reference numeral 109. It serves to drive a motor vehicle, not shown, or a generator, also not shown.
  • the engine 109 includes a plurality of cylinders 129, one of which is shown in FIG.
  • a combustion chamber 14 of the cylinder 129 is bounded by a piston 16.
  • Fuel 229 enters the combustion chamber 14 directly through an injector 18, which is connected to a fuel pressure accumulator 209.
  • Fuel 229 injected into the combustion chamber 14 is ignited by means of a laser pulse 24 which is emitted by an ignition device 27 comprising a laser device 11 into the combustion chamber 14 and focused by means of focusing optics 261.
  • the laser device 11 is fed by a light source 10 via a light guide 12 with a pumping light.
  • the light source 10 is controlled by a control and regulating device 32, which also controls the injector 18.
  • the light source 10 also includes a diode laser 13, which, in response to a control current, emits a corresponding pump light via the light source 12
  • FIG. 2 schematically shows a detailed view of the solid state laser 260 of FIG
  • the solid-state laser 260 has a laser-active solid, hereinafter referred to as laser crystal 44, to which a crystal, also referred to as Q-switch, the passive Q-switch 46, is optically arranged downstream.
  • the solid-state laser 260 also has a coupling-in mirror 42 and a coupling-out mirror 48.
  • the components of the solid state laser 260 are monolithic in this example, that is, they are largely non-detachably connected to each other, for example by bonding and / or coating.
  • a laser pulse also called a giant pulse
  • the passive Q-switch 46 is in its idle state, in which it has a relatively low transmission for the light to be generated by the laser device 11. In this way, the process of stimulated emission and thus the generation of laser radiation are initially suppressed. However, as the pumping time increases, that is, when it is exposed to the pumping light 28a, the radiation intensity in the solid-state laser 260 rises, so that the passive Q-switch 46 finally fades. This increases his
  • the laser pulse 24 is, optionally using another light guide (not shown) or directly, coupled through a likewise not shown combustion chamber window of the laser device 11 in the combustion chamber 14 ( Figure 1) of the engine 109, so that existing therein fuel 229 or air / Fuel mixture is ignited.
  • Figures 3a, 3b, 3c and 3d show a schematic view of a
  • the diode laser 13 encompassed by the light source 10 has the design of a so-called diode laser bar. It thus has a plurality of juxtaposed emitters 131.
  • the emitters 131 have a side surface 1310 through which the light generated by the emitters 131 exits.
  • This side surface 1310 typically has an approximately rectangular shape with a short, for example, ⁇ long, first side 1311 and a, usually referred to as slow axis, a longer, for example 10 - 500 ⁇ long, second side, for example, ⁇ long first page 1311 and 1312. Between those in one
  • Layer plane in the direction of the slow axis juxtaposed emitters 131 are called separation trenches designated areas from which no light is emitted.
  • the generated by the emitters 131 and emerging from the side surfaces 1310 light Each has the shape of a cone of light, wherein the half-opening angle of the light cone in the plane of the fast-axis is typically in the range of 30 ° to 60 ° and is generally significantly larger than the opening angle of the cone of light in the plane of the slow axis typically only a few degrees.
  • the diode laser 13 has the design of a so-called diode laser bar
  • the invention is not limited to such a design, but also includes, for example, diode laser 13 with other arrangements of emitters 131, for example arrangements having emitters 131 in multiple layer planes, these Layer planes are offset for example in the direction of the fast axis by a few microns to each other, for example, so-called diode laser stacks or nanosticks.
  • a transmission of the invention to other types of lasers known per se or other types of light sources known per se instead of a diode laser 13 is conceivable.
  • the light guide device 12 likewise encompassed by the light source 10 has a multiplicity of fibers 121, the fibers 121 each having a first end 1211 and a second end 1212.
  • the fibers 121 are arranged in the region of their first ends 1211 in a position next to one another. Furthermore, the fibers 121 are arranged in the region of their first ends 1211 such that the end faces 1216 of the fibers 121 associated with the first ends 1211 lie together in one plane.
  • the fibers 121 are arranged in the region of their first ends 1211 along their side surfaces 1217 in abutment, that is arranged so that all fibers 121 or almost all fibers 121, for example, more than 90% of the fibers 121, immediately adjacent fibers 121 in the region touching first ends 1211.
  • the fibers 121 are connected to a fiber carrier 20 in the region of their first ends 1211.
  • the fiber carrier 20 used in this example has the shape of a cuboidal disk, extends across the width in which the fibers 121 are arranged, for example, about 20 mm, has an in
  • the fiber carrier 20 terminates flush on its side facing the diode laser 13 with the end faces 1216 of the fibers 121.
  • the height of the fiber carrier 20 is in the range of a few tenths of a millimeter to a few millimeters and is typically many times higher than the height of the fibers 121.
  • the fiber carrier 20 consists of a glass and is bonded to the fibers 121 in the region of their first ends 1211.
  • the fiber carrier 20 consists of a glass, which compared to the type of glass or to the types of glass that make up the fibers 121, a lower hardness at room temperature, a comparable
  • Types of glass used are, for example, float glasses.
  • the region which is referred to herein as the region of the first ends 1211 of the fibers 121 is to be understood in particular as the region of the fibers 121 in which the fibers 121 are arranged on the fiber carrier 20.
  • the composite of fibers 121 and fiber carrier 20 is fixed relative to the diode laser 13, for example by gluing. Another possibility is to fix by clamping so that it can be loosened at a later time, for example, for disassembly or readjustment.
  • the fibers 121 are arranged in the region of their first ends 1211 not only on a fiber carrier 20, but are arranged between the fiber carrier 20 and a second fiber carrier 21.
  • the fiber carrier 20 and the second fiber carrier 21 each have the shape of a cuboid glass disc and are, for example, the same size.
  • the surface of the fiber carrier 20 facing the fibers 121 and the surface of the second fiber carrier 21 facing the fibers 121 are parallel to one another, so that the gap remaining between the fiber carriers 20, 21 has a uniform height.
  • a tilting takes place at an angle of 0.1 ° to 2.5 °, for example 0.2 ° to 0.5 °.
  • a continuous taper of the fibers 121 is provided. Due to the continuous transition between one of the coupling into the fibers 121
  • the two fiber carriers 20, 21 can have similar, in particular identical, properties with respect to their material.
  • the second fiber carrier 21 preferably consists of a glass, which has a lower hardness at room temperature and / or a comparable coefficient of thermal expansion and / or a higher one compared to the type of glass or to the types of glass making up the fibers 121
  • the light source is a photodetector 90 for
  • the photodetector 90 detected scattered light 111, which is scattered in the transition from the emitters 131 in the first ends 1211 of the optical fibers 121.
  • the photodetector 90 is spaced about 1mm from the fiber carrier 20 in this example.
  • the light source further comprises one or more further photodetectors 91, which also serve to detect stray light 111 which is scattered in the transition from the emitters 131 into the first ends 1211.
  • the photodetector 90 is formed, for example, as a photodiode and formed with an associated spectral filter so that it narrow-band emission of the diode laser 13 (for example, light of wavelength 807nm to 809nm) measures.
  • the further photodetector 91 is, for example, likewise designed as a photodiode, but the spectral filters which prevent the emission of the diode laser 13 (for example, the light of the
  • Wavelength 807 nm to 809 nm) or the laser device 11 for example, 1064 nm wavelength light.
  • spectral filters are associated with the further photodetector so that it only detects light in the wavelength range less than 500 nm, which is primarily due to the illumination of the combustion taking place in the combustion chamber 14 (FIG. 1).
  • Emission of the laser device 11 (for example, light of wavelength 1064 nm) is possible.
  • the detectors 90, 91 are located in substantially different locations, for example at locations 20mm apart, or at locations whose spacing is greater than half the maximum extension of the diode laser.
  • this means is embodied as a coating 122 applied on an outer surface of the fiber carrier 20, by which the light intensity incident on the photodetector 90 is approximately doubled.
  • a mirroring 122 of further outer surfaces of the fiber carrier 20 and a reflective coating 122 on both fiber carriers 20, 21 and / or spectrally selective reflective coatings 122 are possible.
  • this means is embodied as a coating 122 applied on an outer surface of the fiber carrier 20, and the outer surface of the fiber carrier 20 is additionally curved in such a way that the scattered light 111 is focused onto the photodetector 90.
  • An arrangement without mirroring 122 is possible. In this case, the scattered light by a
  • this means is embodied as a light guide 125 applied on an outer surface of the fiber carrier 20, by which the scattered light 111 is supplied to the photodetector 90, in particular by multiple reflection.
  • this means is embodied as a gel 140, which is arranged in a spatial region between the fiber carrier 20 or the fiber carriers 20, 21 and the photodetector 90.
  • this means is embodied as a fluorescent substance 128 which is applied to an outer surface of the fiber carrier 20, the photodetector 90 detecting the resulting fluoroscopic light 112.

Abstract

L'invention concerne une source de lumière notamment destinée à l'excitation optique d'un dispositif laser (11), par exemple d'un dispositif laser (11) d'un système d'allumage laser (1) d'un moteur à combustion interne (109), comportant un laser à diodes (13) et un dispositif de guidage de lumière (12), le dispositif de guidage de lumière (12) étant disposé de telle manière par rapport au laser à diodes (13) que de la lumière produite par le laser à diodes (13) est introduite dans le dispositif de guidage de lumière (12). La source de lumière est caractérisée en ce qu'elle comporte un photodétecteur (90) pour la détection de lumière diffusée (111) qui est diffusée lors du passage de la diode laser (13) au dispositif de guidage de lumière (12).
PCT/EP2010/064302 2009-11-06 2010-09-28 Source de lumière WO2011054603A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009046464.6 2009-11-06
DE102009046464A DE102009046464A1 (de) 2009-11-06 2009-11-06 Lichtquelle

Publications (2)

Publication Number Publication Date
WO2011054603A2 true WO2011054603A2 (fr) 2011-05-12
WO2011054603A3 WO2011054603A3 (fr) 2011-07-07

Family

ID=43416503

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/064302 WO2011054603A2 (fr) 2009-11-06 2010-09-28 Source de lumière

Country Status (2)

Country Link
DE (1) DE102009046464A1 (fr)
WO (1) WO2011054603A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015185803A1 (fr) 2014-06-05 2015-12-10 Outotec (Finland) Oy Extraction d'or par solvant

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004006932B3 (de) 2004-01-30 2005-10-20 Dilas Diodenlaser Gmbh Hochleistungs-Diodenlaser mit einer Einrichtung zur Strahlformung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6061374A (en) * 1997-02-07 2000-05-09 Coherent, Inc. Laser diode integrating enclosure and detector
US6081638A (en) * 1998-07-20 2000-06-27 Honeywell Inc. Fiber optic header with integrated power monitor
US6898219B2 (en) * 2000-09-29 2005-05-24 Optical Communication Products, Inc. Apparatus and method for VCSEL monitoring using scattering and reflecting of emitted light
US7146073B2 (en) * 2004-07-19 2006-12-05 Quantronix Corporation Fiber delivery system with enhanced passive fiber protection and active monitoring

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004006932B3 (de) 2004-01-30 2005-10-20 Dilas Diodenlaser Gmbh Hochleistungs-Diodenlaser mit einer Einrichtung zur Strahlformung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015185803A1 (fr) 2014-06-05 2015-12-10 Outotec (Finland) Oy Extraction d'or par solvant

Also Published As

Publication number Publication date
DE102009046464A1 (de) 2011-05-12
WO2011054603A3 (fr) 2011-07-07

Similar Documents

Publication Publication Date Title
EP1888914B1 (fr) Dispositif d'allumage pour moteur a combustion interne
EP2627894B1 (fr) Système d'allumage laser pour moteur à combustion interne et procédé permettant de faire fonctionner ledit système
DE10063151B4 (de) Vorrichtung und Verfahren zur Analyse der qualitativen und/oder quantitativen Zusammensetzung von Fluiden
DE112008000872T5 (de) Vorrichtung und Verfahren zur Laserbearbeitung
EP2320215B1 (fr) Système laser à semi-conducteur de détection de gaz avec élément de mise en forme de faisceau intégré et commandé thermiquement
EP2406671B1 (fr) Dispositif laser comportant une diode laser et plusieurs fibres optiques
DE102017213465A1 (de) Lichtleiter-basiertes LiDAR-System
DE102019120919A1 (de) Linseneinrichtung variabler brennweite
EP0447768A1 (fr) Module laser
DE102006024678A1 (de) Zündeinrichtung für eine Brennkraftmaschine
EP1523669B1 (fr) Dispositif d'analyse spectrometrique infrarouge d'un milieu solide, liquide ou gazeux
WO2011072946A1 (fr) Système d'allumage laser
DE102019120695A1 (de) Verlagerungssensor vom nicht-kontakttyp
DE102009054601A1 (de) Laserzündsystem
WO2021175967A1 (fr) Localisation de points de couplage optique
WO2011054603A2 (fr) Source de lumière
DE60106555T2 (de) Sensor unter Verwendung von abgeschwächter Totalreflektion
DE202019103527U1 (de) Optische Messvorrichtung mit konfokal-chromatischem, optischem Sensor
DE102018114969B4 (de) Verfahren und Vorrichtung zur Einkopplung von Licht in einen Lichtleiter und Sensor
WO2010102872A1 (fr) Source lumineuse pourvue d'une diode laser et d'une pluralité de fibres optiques
DE102019200771A1 (de) Vorrichtung zur Detektion von Partikeln in einem Fluid führenden Bereich unter Verwendung des Prinzips der laserinduzierten Inkandeszenz
DE102011005327A1 (de) Einzelphotonenemissionssystem
DE10004999A1 (de) Vorrichtung zur Führung eines Lichtstrahls, dessen Strahlprofil nichtrotationssymmetrisch ausgebildet ist
DE102012215487B4 (de) Zündeinrichtung für eine Brennkammer einer Brennkraftmaschine
DE102005009642B4 (de) Optischer Signalaufnehmer mit Strahlformungseinrichtung

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10770522

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 10770522

Country of ref document: EP

Kind code of ref document: A2