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WO2003005065A2 - Element support pour un module optique et module optique - Google Patents

Element support pour un module optique et module optique Download PDF

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Publication number
WO2003005065A2
WO2003005065A2 PCT/EP2002/007443 EP0207443W WO03005065A2 WO 2003005065 A2 WO2003005065 A2 WO 2003005065A2 EP 0207443 W EP0207443 W EP 0207443W WO 03005065 A2 WO03005065 A2 WO 03005065A2
Authority
WO
WIPO (PCT)
Prior art keywords
light
carrier component
light output
elements
module
Prior art date
Application number
PCT/EP2002/007443
Other languages
German (de)
English (en)
Other versions
WO2003005065A3 (fr
Inventor
Thomas Paatzsch
Martin Popp
Jens Haase
Original Assignee
INSTITUT FüR MIKROTECHNIK MAINZ 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 INSTITUT FüR MIKROTECHNIK MAINZ GMBH filed Critical INSTITUT FüR MIKROTECHNIK MAINZ GMBH
Priority to AU2002321175A priority Critical patent/AU2002321175A1/en
Publication of WO2003005065A2 publication Critical patent/WO2003005065A2/fr
Publication of WO2003005065A3 publication Critical patent/WO2003005065A3/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
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
    • G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
    • G02B6/29362—Serial cascade of filters or filtering operations, e.g. for a large number of channels
    • G02B6/29365—Serial cascade of filters or filtering operations, e.g. for a large number of channels in a multireflection configuration, i.e. beam following a zigzag path between filters or filtering operations

Definitions

  • Carrier component for an optical module, and an optical module
  • the invention relates to a carrier component for an optical module according to the preamble of patent claim 1 and an optical module according to the preamble of patent claim 12.
  • WDM Widelength - Division Multiplexing
  • a light input beam consisting of light of different wavelengths is divided into a plurality of light output beams, each consisting of light of a specific wavelength range, using WDM modules.
  • a plurality of light input beams, each consisting of light from a specific wavelength range can also be combined to form a common light output beam of different wavelengths by means of WDM modules.
  • waveguide is understood to mean a light-guiding element integrated in a fixed structure, that is to say, for example, a waveguide trench of a rigid component filled with core material.
  • light fiber is understood to mean a light guide element that is bendable and that exists on its own, that is, not only in combination with another structure.
  • WDM modules are based, for example, on integrated optical waveguide cables arranged as Mach-Zehnder or as so-called arrayed waveguide grating (AWG).
  • AWG arrayed waveguide grating
  • interference filters for the wavelength-dependent decomposition of a light input beam. Arrives from light existing light input beam of different wavelengths onto an interference filter, only light waves of a certain wavelength range are passed through the filter. The rest of the incoming light beam is reflected. It is thus possible, using a plurality of interference filters, each with different transmission properties, to split the light input beam into a plurality of output beams, each with a specific wavelength range.
  • the diffraction grating spatially separates the light input beam into a plurality of light output beams, which are collected by correspondingly spatially arranged receptor elements and fed into respective optical information channels.
  • planar waveguides If these components are combined with planar waveguides in order to keep dispersion of the light output rays between the diffraction grating and the receptor elements low, the disadvantage of high material attenuation due to the planar waveguides must also be taken into account. When using interference filters, the complex adjustment through active fiber coupling is disadvantageous.
  • DE 38 01 764 AI discloses a wavelength division multiplexer or demultiplexer in which the high adjustment effort is dispensed with, since the optical waveguides and the optical components are fixed on a silicon plate made of single-crystal silicon, on which holders are produced by anisotropic etching. are posed.
  • the property is exploited here that the reproducibility of crystallographic angles and planes is very high for physical reasons.
  • the arrangement of the optical fibers and microscopic components must be selected so that when using an anisotropic etching process, the high-precision crystallographic planes are used as side walls of the guide grooves and holders, at which planes the etching rate perpendicular to them is very compared to etching rates in other crystallographic directions is low.
  • the geometric arrangement of the microscopic components is therefore limited in that only certain angles can be produced by anisotropic etching.
  • optical light beam splitter known, which are used in optical fiber networks as optical splitters, switches, power dividers or signal duplicators.
  • an expansion optic on the input side, a beam splitter unit and focusing optics on the output side are firmly connected to one another in certain geometrical arrangements, so that an integrated light beam splitter is formed in which a simple coupling of the incident light beam and a simple feeding of the resulting light beams is ensured.
  • the object on which the invention is based is to provide an inexpensive carrier component and an optical module for the wavelength-dependent and / or light quantity-dependent decomposition of a light input beam into a plurality of light output beams and / or for merging a plurality of light input beams of different wavelengths and / or different or identical light quantities to provide a common light output beam that have the simplest possible structure.
  • the object is achieved in a carrier component of the type described in the introduction by the characterizing features of patent claim 1. Furthermore, the object is achieved in a generic optical module according to the invention by the characterizing features of claim 12. Advantages and developments of the inventive concept can be found in the following description or are defined in subclaims.
  • the module according to the invention for splitting a light input beam, which in particular consists of light of different wavelengths, into a plurality of light output beams, each consisting of light of a specific wavelength range and / or of light of a specific intensity, and / or for combining several, each of light consisting of certain wavelength range and / or light input beams consisting of light of a certain intensity to form a common light output beam has at least one light input channel for the respective introduction of a corresponding light input beam into the module, at least one light output channel for the respective exit of a corresponding light Output beam from the module and a light beam decomposition merging device which is connected to the at least one light input channel and the at least one light output channel and has a plurality of lens elements and filter elements.
  • An essential aspect of the invention is that at least one carrier component is integrated in the module, which is designed in one piece and for receiving the lens elements and / or the filter elements.
  • the carrier component is designed as a molded part which can be produced in a manner known per se, for example by injection molding, injection stamping or hot stamping.
  • Integrated recesses are contained in the carrier component or in the molded part for receiving the lens elements and / or the filter elements, into which recesses the lens elements or filter elements can preferably be fitted without additional auxiliary elements.
  • a molded part is generally understood to mean a component which is produced by molding from a mold insert during injection molding, injection molding or hot stamping.
  • the mask need not be positioned according to the invention exactly to predetermined crystallographic surfaces of the carrier components to be processed.
  • the carrier components are produced from molding materials, for example plastics or ceramics, which, in comparison to single-crystal silicon, can be shaped freely and are considerably less expensive.
  • the effort required to produce a microstructured mold insert for the carrier component molded according to the invention can be similar to that in the production of a carrier component according to DE 38 01 764 AI
  • This mold insert can then be used in many cases for molding the carrier components according to the invention, which can therefore be produced very inexpensively in connection with the inexpensive molding materials in a standard injection molding or injection molding process.
  • the second cutouts can have or form fiber trenches for receiving optical waveguide elements such as optical fibers and / or waveguide trenches for forming waveguides.
  • the waveguides are preferably used to connect the respective adjoining fiber trenches or the light fibers embedded in the fiber trenches with the corresponding lens elements.
  • waveguide trenches or waveguides makes it possible to align all of the fiber trenches provided for the light input channels and the light output channels in parallel and at a mutually constant distance from one another.
  • the carrier component can thus be connected to a fiber ribbon, in particular to a fiber ribbon with a constant pitch, which means a simplification in terms of production technology when connecting the carrier component to light fibers.
  • the waveguide functions here as a "directional adapter" to convert the direction of propagation of the light entering the waveguide into the axial direction of the fiber trench. This eliminates the need to provide curved fiber trenches, which can lead to a breakage of the optical fiber or usually cause difficulties in embedding the optical fiber in the fiber trenches.
  • the waveguides are preferably formed in the waveguide trenches in such a way that one end of the waveguide is in direct contact with the surface of the lens element to be connected thereby coincides.
  • the lens element is preferably first brought into a recess provided for this purpose and then the waveguide trench ending on the lens element is filled with core material in such a way that the waveguide "fuses" with the surface of the lens element. In particular, this avoids the effort required for otherwise preparing the waveguide end surface.
  • Third recesses are preferably integrated into the carrier component, through which optical paths can be specified during operation of the module, in particular in the area of the light beam decomposition-merging device and in particular between the lens elements and / or the filter elements. Large parts of the optical paths that the light travels within the light beam decomposition combining device are thus preferably in the form of a free beam area.
  • the first, second and / or third cutouts are advantageously designed in such a way that the lens elements, the filter elements and the optical fibers / waveguides, after being introduced into the respective cutouts, are aligned in such a way that no additional adjustment of the elements is necessary, that is to say a complete one passive adjustment of the elements is made possible.
  • the respective structural heights of the cutouts are designed so precisely due to the accuracy that can usually be achieved with a molding tool that the embedded elements are precisely aligned both in terms of their height and in their horizontal and vertical positions. This enables low module manufacturing costs and a low total number of components, since special parts necessary for adjusting the embedded elements can be dispensed with within the carrier component.
  • the light beam splitting merging device is preferably designed in such a way that a lens element is provided at the end of the light input beam located in the carrier component, with which the light emerging from the light input channel can be converted into a collimated light beam. Furthermore, a lens element and a filter element are provided at each of the ends of the light output channels located in the carrier component.
  • the lens elements and the filter elements are arranged in such a way that the coordinated light beam can be successively reflected from filter element to filter element, through which filter elements light of a specific wavelength range and / or light of a specific intensity can be filtered out of the collimated light beam and the light filtered out by the corresponding lens element can be fed into the respective light output channel.
  • the light beam splitting merging device is preferably based on the free-beam principle, ie the light paths that the combined light beam travels between the filter elements are preferably realized as a coherent free-beam area through the third cutouts.
  • the light output channels can also be used as light input channels and the light input channel can accordingly be used as a common light output channel.
  • the module according to the invention has a carrier with at least one carrier component according to the invention, the filter elements preferably being implemented by interference filters and / or partially transparent filters, in particular partially transparent mirrors, and the lens elements being implemented by spherical lenses, graded index lenses or crossed cylindrical lenses.
  • the carrier component is advantageously designed as a housing component of a housing of the module according to the invention.
  • FIG. 2 shows an embodiment of the module according to the invention in an exploded view with a carrier component according to FIG. 1; 3 shows the module according to FIG. 2 in the assembled state;
  • FIG. 4 shows the module according to FIG. 2 in operation
  • Fig. 5 is a top view of the module of Fig. 2 in operation;
  • Fig. 6 is a side view of the module of FIG. 2 in the assembled
  • FIG. 7 shows a further embodiment of the module according to the invention with an integrated waveguide; 8 shows the module according to FIG. 7 in the assembled state; Fig. 9 is a top view of the module of Fig. 7; Fig. 10 is a top view of the module of Fig. 8; FIG. 11 shows one used to manufacture the carrier component according to FIG. 1
  • FIGS. 1 to 6 A first preferred embodiment of a carrier component according to the invention or a module according to the invention is explained in more detail below with reference to FIGS. 1 to 6. Corresponding components are identified by the same reference numerals.
  • a carrier component 1 has a first to fifth spherical lens cutout 2 25 to 25, a first to fourth interference filter cutout 3 ⁇ to 3 4 , a free beam area cutout 4, and a first to fifth fiber trench 5 ⁇ to 5s on.
  • a first to fifth ball lens 6 1 to 65 are stored in the first to fifth ball lens recess 2 1 to 2 s. Furthermore, a first to fourth interference filter 7 to 7 4 are introduced into the first to fourth interference filter recesses 31 to 34. A first to fifth optical fibers 8 1 to 8 5 or other light guide elements are introduced into the fiber trenches 5 ⁇ to 5s. As can be seen from FIG. 6, the ball lenses 6 1 to 6 5 , the interference filters 7 ⁇ to 7 4 and the light fibers 8 1 to 8 5 are in their height due to a first to third structural height S1 to S3 of the respective recesses of the carrier component 1 exactly aligned.
  • the first structural height S 1 corresponds to the surface of the carrier component 1
  • the second structural height S2 corresponds to the respective trench bottoms of the fiber trenches 5j to 5s
  • the third structural height S3 corresponds to the bottom of the ball lens recesses 2 to 2s, the interference filter recesses 3 ⁇ to 3 4 and the bottom of the free jet area recess 4.
  • a light beam 9 arriving in the first light fiber 5 ⁇ is expanded by the first ball lens 6 ⁇ into a collimated light beam 10.
  • the combined light beam 10 strikes the third interference filter lz, through which part of the light of the collimated light beam 10 is transmitted and a complementary part of the light is reflected toward the first interference filter 7j.
  • the transmitted part of the light is focused by the fourth spherical lens 6 4 and coupled into the fourth light fiber 84 as the first light output beam 10 ⁇ . This process continues analogously, so that a total of first to fourth light output beams 10 ⁇ to IO 4 are generated, each with light of a specific wavelength range.
  • the invention includes analog arrangements for generating more or less than four light output beams.
  • the molding tool 11 shown in FIG. 11 has to be adapted accordingly.
  • the invention thus enables the light input beam to be cascaded into a multiplicity of light output beams in a narrow space with only one integrated component.
  • graded index lenses or crossed cylindrical lenses can also be used.
  • partially transparent filters can also be used.
  • a light beam is broken down into a plurality of light beams with the same wavelength distribution and in each case a specific light intensity, or a plurality of input signals with light beams of the same and / or different wavelength ranges and / or light intensities are combined to form an output beam.
  • Such partially transparent filters can e.g. B. can be realized by partially transparent mirrors.
  • interference filters and partially transparent filters are of course also possible.
  • An alternative embodiment of a module 30 'or a carrier component 1' shown in FIGS. 7 to 10 differs from the first embodiment in that between the second and third spherical lenses 6 2 , 63 and the corresponding second and third optical fibers 82, 83 first and second waveguide or waveguide trench 12 ⁇ , 12 2 are arranged, which connects the light fibers 8 2 , 8 3 with the ball lenses 6 2 , 6 3 or the fiber trenches with the ball lens recesses.
  • the curvature of the waveguide makes it possible to align all of the light fibers or fiber trenches in parallel.
  • the two waveguides 12 x, 12 2 thus function as "adapters" to enable the parallel alignment of all light fibers.
  • the waveguides 12 ⁇ , 12 2 are preferably covered by a cover plate 13 in order to ensure a symmetrical propagation of the light within the waveguides 12 ⁇ , 12 2 . Otherwise, the functioning of this module 30 'is identical to that of the first embodiment.
  • the carrier components 1, 1 ' are preferably made of a polymer material.
  • Fig. 1 1 shows the mold 11 required for producing the carrier component 1 'of the second embodiment.
  • a first to fifth fiber trench web 14 ⁇ to 14s, a first to second waveguide web 15 ⁇ , 1 ⁇ 2 and a common "web" 16 for training are shown the ball lens recesses, the interference filter recesses and the free jet area.
  • a carrier component 1 'of the second embodiment can thus be produced, which can be used as a precise "optical bench” for light fibers, interference filters and the free radiation area.
  • the LIGA lithography, electroforming, impression
  • the ' embodiments described above had in common that only one light input channel 8' and a plurality of light output channels 8 2 to 8 5 were used. However, it is equally possible to use the light output channels 8 2 to 8 5 as light input channels for light of different wavelengths and / or different or the same intensity and to use the light input channel 8 ⁇ as a common light output channel.
  • the light beams entering through the light input channels 8 2 to 8 5 are superimposed or combined to form a common light output beam by means of the interference filters 7filter to 7 4 and / or the partially transparent filters.

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

Abstract

L'invention concerne un élément support (1, 1') pour un module (30, 30') servant à décomposer un faisceau lumineux d'entrée (9) en plusieurs faisceaux lumineux de sortie (101-104) constitués de lumière d'un domaine spectral défini ou de lumière d'une intensité définie ou servant à réunir plusieurs faisceaux lumineux d'entrée constitués de lumière d'un domaine spectral défini ou de lumière d'une intensité définie en un faisceau lumineux de sortie commun. L'élément support selon l'invention est réalisé en une pièce et permet le logement de lentilles (61-65) et de filtres (71-74). On obtient ainsi, lors du montage de lentilles (61-65) et de filtres (71-74) dans l'élément support (1, 1'), un dispositif de décomposition de rayons lumineux compact, relié à un conduit d'entrée de lumière pour l'entrée du faisceau lumineux d'entrée et à au moins un conduit de sortie de lumière pour la sortie des faisceaux lumineux de sortie. L'élément support (1, 1') réalisé sous forme de pièce moulée permet de produire le module (30, 30') à bon marché.
PCT/EP2002/007443 2001-07-05 2002-07-04 Element support pour un module optique et module optique WO2003005065A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002321175A AU2002321175A1 (en) 2001-07-05 2002-07-04 Support element for an optical module and an optical module

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001132665 DE10132665C2 (de) 2001-07-05 2001-07-05 Trägerkomponente für ein optisches Modul, und ein optisches Modul
DE10132665.3 2001-07-05

Publications (2)

Publication Number Publication Date
WO2003005065A2 true WO2003005065A2 (fr) 2003-01-16
WO2003005065A3 WO2003005065A3 (fr) 2003-11-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2002/007443 WO2003005065A2 (fr) 2001-07-05 2002-07-04 Element support pour un module optique et module optique

Country Status (3)

Country Link
AU (1) AU2002321175A1 (fr)
DE (1) DE10132665C2 (fr)
WO (1) WO2003005065A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007045213A1 (fr) * 2005-10-22 2007-04-26 Hochschule Harz (Fh) Recepteur demultiplexeur pour la transmission sur fibre polymere et procede de fabrication associe
WO2007098731A1 (fr) * 2006-03-01 2007-09-07 Hochschule Harz (Fh) Émetteur-récepteur multiplex pour transmission sur fibre polymère, et procédé de fabrication associé

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Publication number Priority date Publication date Assignee Title
JPS5768098A (en) * 1980-10-16 1982-04-26 Mitsubishi Electric Corp Semiconductor laser synthesizer
DE3801764A1 (de) * 1988-01-22 1989-08-03 Ant Nachrichtentech Wellenlaengenmultiplexer oder -demultiplexer, sowie verfahren zur herstellung des wellenlaengenmultiplexers oder -demultiplexers
JPH02254404A (ja) * 1989-03-28 1990-10-15 Konica Corp ハイブリット集積回路の基板
GB2245080B (en) * 1990-06-16 1993-11-10 Gec Ferranti Defence Syst Fibre optic waveguide coupler
JPH09292542A (ja) * 1996-04-26 1997-11-11 Hoya Corp 光部品実装用基板
US5894535A (en) * 1997-05-07 1999-04-13 Hewlett-Packard Company Optical waveguide device for wavelength demultiplexing and waveguide crossing
US6198864B1 (en) * 1998-11-24 2001-03-06 Agilent Technologies, Inc. Optical wavelength demultiplexer
GB9828330D0 (en) * 1998-12-22 1999-02-17 Northern Telecom Ltd Dielectric optical filter network
US6453083B1 (en) * 1999-05-28 2002-09-17 Anis Husain Micromachined optomechanical switching cell with parallel plate actuator and on-chip power monitoring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007045213A1 (fr) * 2005-10-22 2007-04-26 Hochschule Harz (Fh) Recepteur demultiplexeur pour la transmission sur fibre polymere et procede de fabrication associe
WO2007098731A1 (fr) * 2006-03-01 2007-09-07 Hochschule Harz (Fh) Émetteur-récepteur multiplex pour transmission sur fibre polymère, et procédé de fabrication associé

Also Published As

Publication number Publication date
DE10132665C2 (de) 2003-12-04
AU2002321175A1 (en) 2003-01-21
WO2003005065A3 (fr) 2003-11-20
DE10132665A1 (de) 2003-02-20

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