WO2008128678A1 - Dispositif et procédé d'injection de lumière dans une fibre - Google Patents

Dispositif et procédé d'injection de lumière dans une fibre Download PDF

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Publication number
WO2008128678A1
WO2008128678A1 PCT/EP2008/002987 EP2008002987W WO2008128678A1 WO 2008128678 A1 WO2008128678 A1 WO 2008128678A1 EP 2008002987 W EP2008002987 W EP 2008002987W WO 2008128678 A1 WO2008128678 A1 WO 2008128678A1
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WO
WIPO (PCT)
Prior art keywords
fiber
optical
light
light source
lens
Prior art date
Application number
PCT/EP2008/002987
Other languages
German (de)
English (en)
Inventor
Bernd Offenbeck
Wladimir Tschekalinskij
Stephan Junger
Norbert Weber
Original Assignee
Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V.
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 Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V. filed Critical Fraunhofer Gesellschaft zur Förderung der angewandten Forschung e.V.
Publication of WO2008128678A1 publication Critical patent/WO2008128678A1/fr

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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
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4206—Optical features

Definitions

  • the present invention relates to devices and methods for coupling light into a fiber, such as may be used to increase eye safety in optical data transmission.
  • Fig. 6 shows schematically a typical coupling of light beams into an optical waveguide and m an optical fiber.
  • a light beam of a point light source 100 is typically collimated with a launching optics 110 and optionally refocused, as shown in FIG. 6, in order to couple as much light as possible into an optical fiber 120.
  • a classical coupling optics 110 includes, for example, a collimating lens and possibly also a condensing lens.
  • a direct, mostly magnifying, image of the light source 100 on the fiber 120 is often used.
  • a so-called blunt coupling between the fiber 120 and a light-emitting component is often used (shock coupling). This means that when the light from the light-emitting component 100 is transferred onto the fiber 120, an end face of the light-emitting component 100 and an end face of the optical fiber 120 directly oppose each other
  • an optical fiber 120 is not connected to an optical transmitter or a light source, or if an optical connection between transmitter (eg light source) and a corresponding fiber leading to a corresponding receiver (eg photodiode) has been unintentionally interrupted, for example the coupling technologies mentioned above pose significant risks to eye safety. If, for example, an optical continuous wave power of more than 1 mW from the transmitter strikes the retina of the human eye, (in the case of visible radiation) not only glare but also lasting damage must be expected. Since lasers and laser diodes in optical transmission systems emit such power, protective measures must be taken. The measures to be taken depend on the respective laser protection class, which in turn depends on the emitted power and the wavelength.
  • FIG. 1 An illustration of a point light source 100 on the retina of a viewer is sketched schematically in FIG.
  • FIG. 7 shows a point light source 100 whose light radiation passes through the classic emitter optics 110 and has the intensity distribution shown in FIG. 7 in its focal plane 150. From the focal plane 150, the concentrated radiation emerges in the form of divergent radiation beams and finally strikes an eye 160 of an observer, where the light beams are re-focused and thereby depict the point light source 100 to scale on the retina of the eye 160.
  • the laid-open specification DE 4231919 A1 describes an electrical protection circuit for switching off an electro-optical transducer, e.g. a laser diode, with no optical fiber connected.
  • the published patent application DE 4414862 A1 discloses an optical waveguide connector with monitoring device, wherein the connector is equipped with an optical transmitting and / or receiving element. This element is coupled to the receiver or transmitter connected to the connector and arranged such that it is optically covered when the connector is produced. This will determine if the fiber optic cable is connected or not, or if the connector is installed incorrectly or incompletely.
  • DE 4444569 A1 discloses an electro-optical module with a transmitter which emits energy-rich radiation when electrically driven and with a receptacle into which a connecting part for coupling a coupling element to the transmitter can be introduced.
  • a light barrier beam of a light barrier penetrates the receptacle in such a way that the light barrier beam is interrupted when the connecting element is inserted.
  • the control of the transmitter is only enabled when the light beam is interrupted.
  • a laser safety shutdown is usually provided on the Counter direction of the Ubertragungsshake is controlled, and in the absence of signal in the opposite direction also shuts off the laser in the transmitter direction. Directed operation lacks a jerk channel.
  • the patent EP 0296427 A1 proposes optically coupling a monitor photodiode to a fiber piece (pigtail) of a laser diode via an optical feeder whose output current, after comparison with a reference current, actuates a controlled switch when a predetermined limit value of the light output is exceeded so that the supply current for the laser diode interrupts.
  • the object of the present invention is therefore to provide an apparatus and a method for improving the eye safety in a light coupling into optical fibers. This object is achieved by a device having the features of patent claim 1 and a method according to claim 12.
  • the present invention is based on the finding that the eye safety can be improved in a light coupling into optical fibers by the light from a light source, in particular from a point light source, is divided into a plurality of individual beam sources. That is, a light beam emanating from a light source, instead of being directly or bundled into an optical fiber, e.g. a polymer fiber or a polymer optical fiber, to be coupled, previously transformed into a plurality of separate beam bundles, which are then coupled into the optical fiber.
  • a total radiation power can be distributed to a plurality of beam sources, so that the light output can be increased as a whole, wherein a single light power each of verre. - Th rays sources is eye safe.
  • a higher eye safety can be achieved with staked optical fiber, without significantly affecting the efficiency of the light coupling into the light guide.
  • an optically transparent component whose one side, which faces the optical fiber, comprises an arrangement of optical beam forming units, which can be defined or regularly arranged and / or arranged in a completely random or irregular manner.
  • the optical arrangement is a lens array, in particular a microlens array, ie the beam shaping units are lenses.
  • the side of the optical component facing the light source can be designed as a converging lens in order to maximize a coupling efficiency between the light source and the fiber and to compensate for lateral alignment tolerances.
  • the side facing the light source can also be structured as a plane or otherwise.
  • the optical component can also be part of a housing of a light source or a larger unit, or cast on a side facing the fiber of a potting compound, such as plastic Sprit, be structured, wherein in the potting compound, the light source and optionally other components are included ,
  • An advantage of the present invention is that with a Faspr not connected to the light source and a view into the plurality of light beams, no single light spot can be imaged on the retina of an eye, so that a harmful effect is considerably lower than with a point light source. Thus, the eye safety can be increased.
  • a further advantage of the present invention is that a higher total optical power can be used and thus the range of a transmission link can be increased while at the same time guaranteeing eye safety directly at the light source.
  • FIG. 1 shows a schematic flow diagram of a method for coupling light into a fiber according to an exemplary embodiment of the present invention
  • FIG. 2 shows a device for coupling light into a fiber according to an embodiment of the present invention
  • 4a is a schematic representation of a coupling of a plurality of light beams in an optical fiber according to an exemplary embodiment of the present invention
  • 4b is a schematic representation of a coupling of a plurality of light beams in a multi-core optical fiber according to an embodiment of the present invention
  • Fig. 5 is a schematic representation of an image of the plurality of light rays on the retina of an eye
  • Fig. 6 is a schematic representation of a conventional fiber coupling with high Augengefahrdung.
  • FIG. 7 is a schematic representation of a scaled image of a point light source on the retina of an eye.
  • Fig. 1 shows a schematic flow diagram of a method for coupling light into a fiber according to one.
  • a first step Sl a light beam or a radiation beam is generated by means of a light source.
  • a plurality of radiation beams is generated from the one beam bundle, which can be coupled into the optical fiber.
  • the plurality of radiation beams are coupled into the optical fiber.
  • a device 200 for coupling light into a fiber which can be used to carry out the method described with reference to FIG. 1, is shown schematically in FIG.
  • the device 200 has a light source 100 for generating a light beam or a beam bundle 202. Further, the apparatus 200 includes an optical assembly 204 having a plurality of laterally adjacent beam forming units 206-1 through 206-N for generating the plurality of beam bundles 208-1 through 208-N from the light beam 202, the beam bundles 208-1 to 208-N can be coupled into an optical fiber.
  • the light source 100 is a point light source, such as a laser.
  • the beamforming units 206-1 through 206-N of the device 200 face the optical fiber (not shown).
  • the beam-shaping units 206-1 to "1" , N are lenses, in particular converging lenses, which are designed to form a collimated light beam in a radius of beam bends 208-1 to 208 -N divide.
  • the condenser lenses may be arranged completely arbitrarily defined 206-1 to 206-N or aui ⁇ i.
  • the lenses 206-n (n l, ..., N) in the form of a planar Lens arrays or Mi krol i nsenarrays arranged.
  • the light source 100 facing side of the optical arrangement 204 as a lens can be configured to collimate the divergent light beams of the radiation beam 202 and the coupling efficiency between the light source 100 and the fiber, in particular in the case of light beams emanating divergently from the light source 100 (not shown) to maximize and compensate for lateral adjustment tolerances.
  • the light source side facing may also be structured as a transparent plane. The impingement of already collimated beams is, however, not mandatory, although this may be advantageous in terms of the coupling-in effectiveness.
  • Embodiments of the optical arrangement 204 are shown schematically in FIGS. 3a and 3b.
  • FIG. 3a shows the transparent optical arrangement 204 in the form of a one-piece optical component with a first side 302, which is formed as a plane, and a second side 304, which lies opposite the first side and in which a plurality of adjacent beamforming units or lenses Elementals 306-1 to 306-N are formed.
  • Elementals 306-1 to 306-N are formed.
  • the beam shaping units 306-1 to 306-N have mutually laterally spaced optical axes, which may for example run parallel to each other. Further, beam forming units 306-1 through 306-N may be formed to be along a plane parallel to their optical Axis have a shorter focal length than in a plane perpendicular thereto. A same focal length is of course also possible.
  • the beamforming units 306-1 through 306-N cover the majority of the lateral dimension of the assembly 204 in a laterally flat fashion.
  • the lateral dimensions of the beam-forming units 306-1 to 306-N are, for example, maximally selected in order to find space next to one another.
  • FIG. 3b A front view of the second side 304 of the optical assembly 204 shown in FIG. 3a is shown in FIG. 3b.
  • An embodiment of the first side 302 of the optical arrangement 204 as a plane is advantageous, for example, when collimated light beams from the direction of the light source 100 (not shown) strike the component or the optical arrangement 204.
  • the collimated light beams are split by the lenses 306-1 to 306-N into N beam bundles, which for example can be coupled into an optical fiber.
  • FIG. 3 c shows an optical component 204 according to a further exemplary embodiment of the present invention.
  • a converging lens 308 is formed to collimate outgoing from the light source 100 divergent rays and a
  • light source 100 is in a focal plane of Conveying lens 308 arranged. Furthermore, lateral adjustment tolerances can thus be compensated.
  • the components 204 shown in FIGS. 3a-c can be implemented, for example, in plastic injection molding, so that the optical components 204 can be realized relatively inexpensively.
  • a monolithic production of the component 204 is conceivable.
  • the optical assembly 204 according to exemplary embodiments of glass, in particular quartz glass, consist.
  • the lenslets 306-1 through 306-N may be fabricated using microfabrication techniques such as photolithography and high optical vibration etching techniques.
  • microfabrication techniques such as photolithography and high optical vibration etching techniques.
  • synthetic quartz glass or calcium fluoride can be used as the lens material.
  • a typical application example of embodiments of the present invention is high speed data transmission over polymer optical fibers or multi-core optical fibers.
  • Such fibers generally have a relatively large core diameter or fiber diameter (usually greater than 100 microns, typically, for example, 1 mm), so that the fiber itself provides a relatively high eye safety (large radiating surface with large numerical aperture).
  • a laser with a small radiating surface for example 1 to 3 ⁇ m
  • the power of the laser must be selected so low that eye safety is maintained even when the fiber is staked and the laser is sighted .
  • This may mean, for example, that a fiber may carry up to 4 mW (milliWatts) of optical power in order to be classified in laser protection class 1, but the laser may radiate a maximum of 0.39 mW in order to be classified in this class. the.
  • FIG. 4a shows a coupling of a plurality of radiation beams 208-1 to 208-3 into an optical fiber line 120 according to an embodiment of the present invention.
  • the light or the light beam 202 from the laser 100 is collimated by the first converging lens 308 on the first side 302 of the optical component 204 and again by the lens array 306-n on the second side 304 of the component 204 at N locations through lens elements 306-n. 1 to 306-N are converted into convergent beams 208 of short focal length. Due to the size and numerical aperture of the lens array, the coupling of the light source 100 to the optical fiber 120 can be optimized.
  • the optical member or lens array may be configured to convert the light beam 202 into divergent rays on the fiber side, i.
  • the lens array can have scattering lenses.
  • FIG. 5 shows an apparatus 200 for coupling light into a fiber having a laser 100 and an optical assembly 204, wherein a plurality of radiation beams 208 are imaged onto the retina of an eye 160.
  • an intensity distribution is obtained in a focal plane 550 of the elementary lenses 306-1 through 306-N, as shown schematically in FIG. 5.
  • the light output of the radiation beam 202 is distributed (aperture judgment) so that even when using an external imaging optics, the total beam power can not be collected in one point.
  • the distribution can take place in individual points, circular rings or even arbitrary patterns.
  • the optical coupling of the optical arrangement 204 to the fiber 120 and the light source 100 can be adjusted so that the achieved coupling efficiency can be similarly good like a conventional fiber optic.
  • the optical arrangement or the optical component 204 can, as has already been described above, be realized, for example, in plastic injection molding, so that the optical component can furthermore also be very cost-effective.
  • the fiber 120 comprises a plurality of fiber cores 402, which in turn may each have a fiber core diameter D.
  • Such a multi-core fiber is used as a single core fiber, i. the light is coupled in at the end face of the fiber 120 without specific assignment to the cores.
  • FIG. 4b shows an optical arrangement 204 with the plurality of laterally adjacent beamforming units 306, which form a lens array on the fiber side, for producing a plurality of convergent or divergent bundles of rays 208 from the light beam 202 of the light source 100, which is in the fiber 120 a plurality of fiber cores 402 can be coupled.
  • Optical axes 307 of the lenses 306 are opposite optical axes or axes of symmetry 403 of the lenses Serkerne 402 arranged uncorrelated with respect to their spatial position.
  • Light, starting from the lenses or beam shaping units 306, is coupled into the fiber cores 402 at the end face of the fiber 120 without specific association between the beam shaping units 306 and the fiber cores 402.
  • optical axes 307 of the beamforming units 306 and axes of symmetry 403 of the fiber cores 402 do not coincide, so that accurate tuning of the optical assembly 204 to the fiber 120 is not necessary.
  • the optical axes 307 of the lenses 306 may even be outside of the lenses (random) associated fiber cores 402. That is to say, a distance d between some optical axes 307 of the lenses 306 and some axes of symmetry 403 of the fiber cores 402 is greater than a radius D / 2 of the fiber cores 402.
  • a mean distance d 'between an optical axis 307 of a beam shaping unit 306 and an optical axis 403 of a (randomly) associated fiber core 402 is smaller than D / 2, for example in a range between D / 8 and D / 4 , ie D / 8 ⁇ d ' ⁇ D / 4.
  • the aim of some exemplary embodiments is to form light beams 202 from a (point) light source 100 in such a way that on the one hand a good coupling efficiency to one or more fiber cores 402 is achieved, ie numerical aperture and diameter of the optical arrangement 204 and beam shaping units 306 are adapted to the fiber, but on the other hand, when viewed accidentally in a light beam manipulated by the optical arrangement 204 when the fibers are staked off, focusing on a point and thus on an eye is excluded.
  • honeycomb condensers for slide and film projections are used, for example, in projection and microscopy.
  • the task of a honeycomb condenser is completely different from that of a device according to exemplary embodiments of the present invention, namely the homogenization of light and imaging in an entrance pupil of a projection optics, for example, to illuminate a screen evenly without depicting the structure of the light source (eg Gluhchtl) - the.
  • the eye safety of the system is not in the foreground with honeycomb condensers and is not necessarily ensured by a honeycomb condenser, depending on the design.
  • the homogenization of light is not necessary, but the priority is the distribution of light on many individual sources.
  • a honeycomb condenser is also relatively complicated, consisting of at least three optical components, constructed and its dimensions are relatively large, which is very unfavorable in the fiber coupling, especially in optical transceivers.
  • an adjustment of the components to each other is necessary, which makes a honeycomb condenser generally very expensive.
  • an optical arrangement 204 or an optical component according to exemplary embodiments only consists of a structured optical part.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

Dispositif (200) pour l'injection de lumière dans une fibre (120), comprenant une source lumineuse (100) pour produire un faisceau lumineux (202), et un système optique (20A) doté d'une pluralité d'unités de mise en forme de faisceau (206; 306) latéralement voisines formant, côté fibre, un réseau de lentilles (306-1,..., 306-N) pour produire à partir du faisceau lumineux (202) une pluralité de faisceaux (208) convergents ou divergents (208) qui peuvent être injectés dans la fibre (120).
PCT/EP2008/002987 2007-04-18 2008-04-15 Dispositif et procédé d'injection de lumière dans une fibre WO2008128678A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710018354 DE102007018354A1 (de) 2007-04-18 2007-04-18 Vorrichtung und Verfahren zur Einkopplung von Licht in eine Faser
DE102007018354.4 2007-04-18

Publications (1)

Publication Number Publication Date
WO2008128678A1 true WO2008128678A1 (fr) 2008-10-30

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PCT/EP2008/002987 WO2008128678A1 (fr) 2007-04-18 2008-04-15 Dispositif et procédé d'injection de lumière dans une fibre

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WO (1) WO2008128678A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113655566A (zh) * 2021-07-29 2021-11-16 中国科学院西安光学精密机械研究所 一种用于特种光子晶体光纤的空间光耦合方法及耦合系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016200166A1 (de) * 2016-01-08 2017-07-13 Thomas Hierl Laserbaugruppe für einen laserbasierten Waffensimulator sowie laserbasierter Waffensimulator

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802092A (en) * 1992-12-07 1998-09-01 Sdl, Inc. Diode laser source with concurrently driven light emitting segments
JP2003344802A (ja) * 2002-05-23 2003-12-03 Toshiba Corp レーザ照射装置
US6741777B2 (en) * 1999-06-01 2004-05-25 Picolight, Incorporated Opto-mechanical assembly
DE102004006472B3 (de) * 2004-02-04 2005-04-28 Siemens Ag Optische Koppelstelle für einen Lichtwellenleiter und ein optisches Bauelement

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4516832A (en) * 1982-06-23 1985-05-14 International Business Machines Corporation Apparatus for transformation of a collimated beam into a source of _required shape and numerical aperture
EP0296427B1 (fr) 1987-06-23 1992-11-11 Siemens Aktiengesellschaft Transmetteur à laser diode avec un circuit de protection
DE4231919B4 (de) 1991-10-17 2006-01-26 Marconi Communications Gmbh Sendemodul für einen elektro-optischen Sender
DE4229511C2 (de) 1992-09-04 1995-03-30 Siemens Ag Abschattungseinrichtung für Lichtwellenleiter-Steckverbindungen
DE4414862C2 (de) 1994-04-28 1996-03-07 Phoenix Contact Gmbh & Co Lichtwellenleiter-Steckverbinder mit Überwachungseinrichtung
DE4444569C2 (de) 1994-12-02 1996-09-19 Siemens Ag Elektrooptisches Modul
DE19654600A1 (de) 1996-12-20 1998-06-25 Siemens Ag Optische Datenübertragungseinrichtung mit einer Laserdiode
US6515257B1 (en) * 2001-03-26 2003-02-04 Anvik Corporation High-speed maskless via generation system
US6910812B2 (en) * 2001-05-15 2005-06-28 Peregrine Semiconductor Corporation Small-scale optoelectronic package
US6989945B2 (en) * 2001-06-29 2006-01-24 Xanoptix, Inc. Long-throw, tight focusing optical coupler
WO2003058337A1 (fr) * 2002-01-06 2003-07-17 Raicol Crystals Ltd. Source de lumière laser à longueurs d'onde multiples
GB2388670A (en) * 2002-05-18 2003-11-19 Qinetiq Ltd Coupling multicore optic fibre cores to one single core optic fibre
US7171068B2 (en) * 2002-12-20 2007-01-30 Texas Instruments Incorporated Method to improve an extinction ratio of an optical device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5802092A (en) * 1992-12-07 1998-09-01 Sdl, Inc. Diode laser source with concurrently driven light emitting segments
US6741777B2 (en) * 1999-06-01 2004-05-25 Picolight, Incorporated Opto-mechanical assembly
JP2003344802A (ja) * 2002-05-23 2003-12-03 Toshiba Corp レーザ照射装置
DE102004006472B3 (de) * 2004-02-04 2005-04-28 Siemens Ag Optische Koppelstelle für einen Lichtwellenleiter und ein optisches Bauelement

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113655566A (zh) * 2021-07-29 2021-11-16 中国科学院西安光学精密机械研究所 一种用于特种光子晶体光纤的空间光耦合方法及耦合系统

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